@font-face{font-family:Instrument Sans;font-style:normal;font-weight:400 700;font-display:swap;src:url(./instrument-sans-subset.woff2)format("woff2")}@font-face{font-family:Instrument Serif;font-style:normal;font-weight:400;font-display:swap;src:url(./instrument-serif-subset.woff2)format("woff2")}@font-face{font-family:JetBrains Mono;font-style:normal;font-weight:400 600;font-display:swap;src:url(./jetbrains-mono-subset.woff2)format("woff2")}@font-face{font-family:Caveat;font-style:normal;font-weight:600;font-display:swap;src:url(./caveat-subset.woff2)format("woff2")}@font-face{font-family:Newsreader;font-style:normal;font-weight:200 800;font-display:swap;src:url(./newsreader-latin-wght.woff2)format("woff2")}@font-face{font-family:Newsreader;font-style:italic;font-weight:200 800;font-display:swap;src:url(./newsreader-latin-wght-italic.woff2)format("woff2")}@font-face{font-family:IBM Plex Mono;font-style:normal;font-weight:400;font-display:swap;src:url(./ibm-plex-mono-latin-400.woff2)format("woff2")}@font-face{font-family:IBM Plex Mono;font-style:normal;font-weight:500;font-display:swap;src:url(./ibm-plex-mono-latin-500.woff2)format("woff2")}@font-face{font-family:Fraunces;font-style:normal;font-weight:200 800;font-display:swap;src:url(./newsreader-latin-wght.woff2)format("woff2")}@font-face{font-family:Fraunces;font-style:italic;font-weight:200 800;font-display:swap;src:url(./newsreader-latin-wght-italic.woff2)format("woff2")}@font-face{font-family:Figtree;font-style:normal;font-weight:400 700;font-display:swap;src:url(./instrument-sans-subset.woff2)format("woff2")}:root,[data-theme]{--glass-blur:18px;--glass-dark:#091329a3;--glass-dark-strong:#091329cc;--glass-dark-line:#ffffff38;--glass-dark-hover:#ffffff1f;--glass-ink:#fff;--glass-ink-2:#ffffffdb;--glass-shadow:0 1px 0 #ffffff24 inset, 0 20px 56px #050c1e5c;--text-hero:clamp(2.5rem, 1.3rem + 4.6vw, 4.75rem);--text-title:clamp(1.75rem, 1.4rem + 1.2vw, 2.25rem);--leading-hero:1.04;--tracking-hero:-.035em;--nav-h:56px;--nav-inset:12px;--nav-total:calc(var(--nav-h) + var(--nav-inset) * 2);--hero-h:clamp(540px, 66vh, 660px);--space-10:128px;--dur-ambient:90s;--ease-glide:cubic-bezier(.22, .8, .24, 1)}:root,[data-theme=light]{--glass:#fffc;--glass-line:#14213d1a;--glass-hover:#14213d0f;--wash-sky:#edf4fc;--wash-sky-2:#dfeaf8;--world-sky-top:#3a82e6;--world-sky-mid:#82bdf1;--world-sky-low:#dcf0fb;--world-sun:#fff4cf;--world-cloud:#fff;--world-far:#8fb3dc;--world-far-2:#6f97cc;--world-snow:#f5f9ff;--world-haze:#d6e9f7;--world-hill-1:#86b894;--world-hill-2:#4f9a62;--world-hill-3:#2f7a4e;--world-tree-1:#2f8a52;--world-tree-2:#1f6b43;--world-tree-3:#43ab68;--world-water-1:#7ccbe8;--world-water-2:#2f98d0;--world-water-3:#1c6fb2;--world-path:#f1e7d2;--world-path-edge:#d2c09c;--world-tower:#e9f2fb;--world-glass:#fff3;--world-glass-line:#ffffffb3;--world-bio:#4fd16b;--world-chem:#22cbd6;--world-phys:#8f74ff;--world-window:#fff;--world-stars:0;--world-scrim-left:#0711289e}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--glass:#111a30c7;--glass-line:#ffffff1f;--glass-hover:#ffffff14;--wash-sky:#0f1a33;--wash-sky-2:#14224a;--world-sky-top:#090f2c;--world-sky-mid:#28307a;--world-sky-low:#f0937a;--world-sun:#ffd9a6;--world-cloud:#7f8dc7;--world-far:#2a3770;--world-far-2:#1f2b5c;--world-snow:#8ea2d8;--world-haze:#5a5a9c;--world-hill-1:#23495a;--world-hill-2:#16392f;--world-hill-3:#0e2a24;--world-tree-1:#1a5a3f;--world-tree-2:#0f3e2e;--world-tree-3:#24704b;--world-water-1:#4b6fa8;--world-water-2:#223f78;--world-water-3:#112a55;--world-path:#5a5a7e;--world-path-edge:#3d3d62;--world-tower:#3a4687;--world-glass:#a0beff24;--world-glass-line:#bed2ff8c;--world-bio:#7bf08a;--world-chem:#4ae8f0;--world-phys:#b6a2ff;--world-window:#ffd98a;--world-stars:1;--world-scrim-left:#050a1c8c}}:root[data-theme=dark],[data-theme=dark]{--glass:#111a30c7;--glass-line:#ffffff1f;--glass-hover:#ffffff14;--wash-sky:#0f1a33;--wash-sky-2:#14224a;--world-sky-top:#090f2c;--world-sky-mid:#28307a;--world-sky-low:#f0937a;--world-sun:#ffd9a6;--world-cloud:#7f8dc7;--world-far:#2a3770;--world-far-2:#1f2b5c;--world-snow:#8ea2d8;--world-haze:#5a5a9c;--world-hill-1:#23495a;--world-hill-2:#16392f;--world-hill-3:#0e2a24;--world-tree-1:#1a5a3f;--world-tree-2:#0f3e2e;--world-tree-3:#24704b;--world-water-1:#4b6fa8;--world-water-2:#223f78;--world-water-3:#112a55;--world-path:#5a5a7e;--world-path-edge:#3d3d62;--world-tower:#3a4687;--world-glass:#a0beff24;--world-glass-line:#bed2ff8c;--world-bio:#7bf08a;--world-chem:#4ae8f0;--world-phys:#b6a2ff;--world-window:#ffd98a;--world-stars:1;--world-scrim-left:#050a1c8c}@media (prefers-reduced-motion:reduce){:root,[data-theme]{--dur-ambient:0s}}:root{--navy:#14213d;--navy-2:#24365f;--navy-3:#0c1528;--cream:#fbf7ef;--hl:#ffc83d;--hl-ink:#14213d;--grey-0:#fff;--grey-25:#fafafa;--grey-50:#f6f6f5;--grey-100:#eeeeed;--grey-150:#e3e3e2;--grey-200:#c2c9d4;--grey-400:#9aa3b5;--grey-600:#5a6578;--grey-700:#3e4a62;--night-950:#0e1629;--night-900:#111a30;--night-850:#152039;--night-800:#1b2846;--night-700:#223050;--night-600:#3a4a6e;--night-500:#5d6880;--night-400:#9aa3b5;--night-300:#c8cdd8;--green-600:#1a7f50;--green-700:#146c43;--red-600:#c4261d;--red-700:#a91f17;--amber-600:#9a6200;--violet-600:#6d48d8;--violet-700:#5a37c2;--teal-600:#0b7f86;--teal-700:#086a70;--leaf-600:#4a7d16;--leaf-700:#3d6812;--cobalt-600:#1458e9;--cobalt-300:#8fb2ff;--moss-700:#2f6a3f;--moss-200:#a9d6a6;--verdigris-700:#0f6b66;--verdigris-200:#8fd6cf;--indigo-700:#3d3391;--indigo-200:#bfb6ff;--sage-50:#eef2e7;--oak-50:#f6eee2;--night-band:#0e1630;--night-band-deep:#070c1c;--night-type:#f3efe6;--paper-warm:#fbf8f2;--cobalt-700:#0f47c4;--cobalt-800:#0b3aa3;--sky-50:#eef4ff;--sky-100:#dce8ff;--sky-200:#bcd2fb;--mint-50:#edf8f0;--mint-100:#d8f0de;--mint-200:#b9e1c3;--lilac-50:#f5f0ff;--lilac-100:#e9dffd;--lilac-200:#d4c3fa;--green-v5:#2c7a3e;--purple-v5:#6a3fcf;--blue-v5:#1d56c9;--bunsen-400:#7d93ff;--bunsen-600:#2847e0;--bunsen-950:#0b1020}:root,[data-theme=light]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--canvas:var(--grey-0);--surface-1:var(--grey-0);--surface-2:var(--grey-50);--surface-3:var(--grey-100);--surface-raised:var(--grey-0);--surface-inverse:var(--navy);--scrim:#14213d66;--wash:var(--cream);--wash-line:#ece5d6;--ink:var(--navy);--ink-2:var(--grey-700);--ink-3:var(--grey-600);--ink-4:var(--grey-400);--ink-inverse:var(--grey-0);--line-subtle:var(--grey-100);--line:var(--grey-150);--line-strong:var(--grey-200);--rule:var(--grey-150);--rule-strong:var(--navy);--accent:var(--cobalt-600);--accent-hover:var(--cobalt-700);--accent-pressed:var(--cobalt-800);--accent-ink:#fff;--accent-soft:var(--sky-50);--accent-softer:#f7faff;--accent-text:var(--cobalt-600);--link-line:color-mix(in srgb, currentColor 32%, transparent);--hl-soft:#fff4d6;--marker:var(--hl);--marker-ink:var(--hl-ink);--highlight:var(--bunsen-600);--highlight-ink:#fff;--success:var(--green-600);--success-soft:#e6f2ec;--success-text:var(--green-700);--danger:var(--red-600);--danger-soft:#fbeae8;--danger-text:var(--red-700);--danger-ink:#fff;--warning:#b7790a;--warning-soft:#fbf3e2;--warning-text:var(--amber-600);--info:var(--grey-700);--info-soft:var(--grey-50);--info-text:var(--grey-700);--heat:#c2410c;--heat-soft:#fdeee4;--scene-bg:#dfe4ea;--page:var(--grey-0);--page-line:var(--grey-100);--bench-bay:var(--grey-0);--graph-minor:var(--grey-100);--graph-major:#d5dae3;--margin-rule:transparent;--pen:var(--red-600);--pen-soft:#f8e4df;--pencil:var(--grey-600);--physics:#2f6fe6;--physics-soft:var(--sky-50);--physics-text:var(--blue-v5);--chemistry:#8257e0;--chemistry-soft:var(--lilac-50);--chemistry-text:var(--purple-v5);--biology:#3d9a55;--biology-soft:var(--mint-50);--biology-text:var(--green-v5);--tint-bio:var(--mint-50);--tint-bio-line:var(--mint-200);--tint-chem:var(--lilac-50);--tint-chem-line:var(--lilac-200);--tint-phys:var(--sky-50);--tint-phys-line:var(--sky-200);--tint-blue:var(--sky-50);--blob-bio:#dff3e4;--blob-chem:#ece2fd;--blob-phys:#dbe7ff;--art-leaf-1:#8fd49a;--art-leaf-2:#2f8f49;--art-glass-1:#f3ecff;--art-glass-2:#b89af2;--art-liquid-1:#b08cf5;--art-liquid-2:#7244d6;--art-orb-1:#9cc0ff;--art-orb-2:#2c66e0;--art-paper:#fff;--art-paper-2:#eef1f7;--art-line:#c9d1df;--scribble:#6f9cf5;--cover-mat:#eef1f6;--page-paper:var(--paper-warm);--yours:var(--cobalt-600);--bio-ink:var(--green-v5);--bio-paper:var(--sage-50);--chem-ink:var(--purple-v5);--chem-paper:var(--oak-50);--phys-ink:var(--blue-v5);--phys-paper:var(--night-band);--phys-type:var(--night-type);--phys-ink-night:var(--indigo-200);--focus-ring-color:var(--navy);--shadow-color:28 48 104;--shadow-strength:1}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--canvas:var(--night-950);--surface-1:var(--night-900);--surface-2:var(--night-850);--surface-3:var(--night-800);--surface-raised:#16213a;--surface-inverse:var(--cream);--scrim:#0009;--wash:#121b31;--wash-line:var(--night-700);--ink:var(--cream);--ink-2:var(--night-300);--ink-3:var(--night-400);--ink-4:var(--night-500);--ink-inverse:var(--night-950);--line-subtle:#172238;--line:var(--night-700);--line-strong:var(--night-600);--rule:#1f2b47;--rule-strong:var(--night-300);--accent:var(--cobalt-300);--accent-hover:#adc6ff;--accent-pressed:#7aa0f5;--accent-ink:var(--navy);--accent-soft:#16264a;--accent-softer:#121f3c;--accent-text:#9dbcff;--hl-soft:#3a3320;--highlight:var(--bunsen-400);--highlight-ink:var(--bunsen-950);--success:#4cc38a;--success-soft:#10291f;--success-text:#6fd3a2;--danger:#ff8577;--danger-soft:#3a1a18;--danger-text:#ff9a8e;--danger-ink:#1a0605;--warning:#e6ae3a;--warning-soft:#33270f;--warning-text:#f0c060;--info:var(--night-300);--info-soft:var(--night-850);--info-text:var(--night-300);--heat:#ff9257;--heat-soft:#3a2216;--scene-bg:#1a212b;--page:var(--night-950);--page-line:#1c2743;--bench-bay:var(--night-950);--graph-minor:#1b2743;--graph-major:#2a3a5e;--margin-rule:transparent;--pen:#ff8577;--pen-soft:#3a1a18;--pencil:var(--night-400);--physics:#84adff;--physics-soft:#142446;--physics-text:#a8c4ff;--chemistry:#b89cff;--chemistry-soft:#231a44;--chemistry-text:#cbb6ff;--biology:#7fd38f;--biology-soft:#12281a;--biology-text:#a2e2ad;--tint-bio:#12281a;--tint-bio-line:#24502f;--tint-chem:#211a40;--tint-chem-line:#3d3170;--tint-phys:#13233f;--tint-phys-line:#28457a;--tint-blue:#13233f;--blob-bio:#163322;--blob-chem:#251d4a;--blob-phys:#172b52;--art-leaf-1:#79c987;--art-leaf-2:#2b7a3f;--art-glass-1:#3a3166;--art-glass-2:#9a7fe0;--art-liquid-1:#a07ff0;--art-liquid-2:#6038c4;--art-orb-1:#8fb4ff;--art-orb-2:#2a5fd0;--art-paper:#e9edf6;--art-paper-2:#c9d1e2;--art-line:#8d98ad;--scribble:#7ea7ff;--cover-mat:#1d2940;--page-paper:var(--canvas);--yours:var(--cobalt-300);--bio-ink:var(--moss-200);--bio-paper:#121b15;--chem-ink:#cbb6ff;--chem-paper:#1a1610;--phys-ink:#a8c4ff;--phys-paper:var(--night-band-deep);--phys-type:var(--night-type);--phys-ink-night:var(--indigo-200);--focus-ring-color:#ffd566;--shadow-color:0 0 0;--shadow-strength:3}}:root[data-theme=dark],[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--canvas:var(--night-950);--surface-1:var(--night-900);--surface-2:var(--night-850);--surface-3:var(--night-800);--surface-raised:#16213a;--surface-inverse:var(--cream);--scrim:#0009;--wash:#121b31;--wash-line:var(--night-700);--ink:var(--cream);--ink-2:var(--night-300);--ink-3:var(--night-400);--ink-4:var(--night-500);--ink-inverse:var(--night-950);--line-subtle:#172238;--line:var(--night-700);--line-strong:var(--night-600);--rule:#1f2b47;--rule-strong:var(--night-300);--accent:var(--cobalt-300);--accent-hover:#adc6ff;--accent-pressed:#7aa0f5;--accent-ink:var(--navy);--accent-soft:#16264a;--accent-softer:#121f3c;--accent-text:#9dbcff;--hl-soft:#3a3320;--highlight:var(--bunsen-400);--highlight-ink:var(--bunsen-950);--success:#4cc38a;--success-soft:#10291f;--success-text:#6fd3a2;--danger:#ff8577;--danger-soft:#3a1a18;--danger-text:#ff9a8e;--danger-ink:#1a0605;--warning:#e6ae3a;--warning-soft:#33270f;--warning-text:#f0c060;--info:var(--night-300);--info-soft:var(--night-850);--info-text:var(--night-300);--heat:#ff9257;--heat-soft:#3a2216;--scene-bg:#1a212b;--page:var(--night-950);--page-line:#1c2743;--bench-bay:var(--night-950);--graph-minor:#1b2743;--graph-major:#2a3a5e;--margin-rule:transparent;--pen:#ff8577;--pen-soft:#3a1a18;--pencil:var(--night-400);--physics:#84adff;--physics-soft:#142446;--physics-text:#a8c4ff;--chemistry:#b89cff;--chemistry-soft:#231a44;--chemistry-text:#cbb6ff;--biology:#7fd38f;--biology-soft:#12281a;--biology-text:#a2e2ad;--tint-bio:#12281a;--tint-bio-line:#24502f;--tint-chem:#211a40;--tint-chem-line:#3d3170;--tint-phys:#13233f;--tint-phys-line:#28457a;--tint-blue:#13233f;--blob-bio:#163322;--blob-chem:#251d4a;--blob-phys:#172b52;--art-leaf-1:#79c987;--art-leaf-2:#2b7a3f;--art-glass-1:#3a3166;--art-glass-2:#9a7fe0;--art-liquid-1:#a07ff0;--art-liquid-2:#6038c4;--art-orb-1:#8fb4ff;--art-orb-2:#2a5fd0;--art-paper:#e9edf6;--art-paper-2:#c9d1e2;--art-line:#8d98ad;--scribble:#7ea7ff;--cover-mat:#1d2940;--page-paper:var(--canvas);--yours:var(--cobalt-300);--bio-ink:var(--moss-200);--bio-paper:#121b15;--chem-ink:#cbb6ff;--chem-paper:#1a1610;--phys-ink:#a8c4ff;--phys-paper:var(--night-band-deep);--phys-type:var(--night-type);--phys-ink-night:var(--indigo-200);--focus-ring-color:#ffd566;--shadow-color:0 0 0;--shadow-strength:3}:root,[data-theme]{--font-display:"Newsreader", "Iowan Old Style", Georgia, serif;--font-head:var(--font-display);--font-body:"Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--font-data:"IBM Plex Mono", "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;--font-hand:"Caveat", "Segoe Print", "Bradley Hand", cursive;--text-xs:.75rem;--text-sm:.875rem;--text-md:1rem;--text-lg:1.25rem;--text-xl:1.5rem;--text-display:clamp(2.5rem, 1.6rem + 2.8vw, 3.5rem);--text-h1:clamp(2rem, 1.6rem + 1.25vw, 2.5rem);--text-h2:clamp(1.5rem, 1.1rem + 1.25vw, 2rem);--text-h3:1.25rem;--text-world:clamp(4.5rem, 2rem + 9vw, 11rem);--text-practical:clamp(3rem, 1.8rem + 4.5vw, 6.5rem);--text-close:clamp(3rem, 1.6rem + 5vw, 6rem);--tracking-world:-.04em;--leading-world:.86;--rise:28px;--ease-out-soft:cubic-bezier(.2, .7, .2, 1);--text-kicker:var(--text-sm);--leading-body:1.55;--leading-ui:1.3;--leading-snug:1.3;--leading-head:1.15;--leading-tight:1.05;--measure-narrow:52ch;--measure:68ch;--measure-max:75ch;--tracking-display:-.02em;--tracking-label:0;--tracking-overline:0;--overline-case:none;--overline-tracking:0;--overline-size:var(--text-sm);--overline-ink:var(--ink-3);--weight-regular:400;--weight-medium:600;--weight-semibold:600;--weight-bold:700;--weight-display:500;--weight-h1:500;--weight-h2:500;--weight-head:500;--link-weight:1px;--space-0:2px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--space-7:48px;--space-8:64px;--space-9:96px;--radius-0:4px;--radius-1:8px;--radius-2:12px;--radius-3:16px;--radius-xs:var(--radius-0);--radius-s:6px;--radius-m:var(--radius-1);--radius-l:var(--radius-2);--radius-xl:var(--radius-3);--radius-pill:999px;--elev-0:none;--elev-1:0 1px 2px rgb(var(--shadow-color) / calc(.05 * var(--shadow-strength)));--elev-2:0 1px 2px rgb(var(--shadow-color) / calc(.05 * var(--shadow-strength))), 0 4px 12px rgb(var(--shadow-color) / calc(.06 * var(--shadow-strength)));--elev-3:0 2px 6px rgb(var(--shadow-color) / calc(.07 * var(--shadow-strength))), 0 16px 40px rgb(var(--shadow-color) / calc(.12 * var(--shadow-strength)));--elev-soft:0 1px 2px rgb(var(--shadow-color) / calc(.05 * var(--shadow-strength))), 0 4px 14px rgb(var(--shadow-color) / calc(.05 * var(--shadow-strength)));--elev-4:0 4px 12px rgb(var(--shadow-color) / calc(.1 * var(--shadow-strength))), 0 32px 80px rgb(var(--shadow-color) / calc(.2 * var(--shadow-strength)));--focus-ring-width:2px;--focus-ring-offset:2px;--focus-ring:0 0 0 2px var(--canvas), 0 0 0 4px var(--focus-ring-color);--focus-halo:0 0 0 3px color-mix(in srgb, var(--focus-ring-color) 22%, transparent);--dur-instant:.12s;--dur-fast:.12s;--dur-base:.2s;--dur-slow:.32s;--dur-slower:.32s;--ease:cubic-bezier(.2, .7, .2, 1);--ease-out:cubic-bezier(.16, 1, .3, 1);--ease-in:cubic-bezier(.5, 0, .75, 0);--ease-in-out:cubic-bezier(.65, 0, .35, 1);--ease-spring:var(--ease-out);--ease-arrive:cubic-bezier(.2, .8, .2, 1);--ease-move:cubic-bezier(.4, 0, .2, 1);--dur-pen:.18s;--dur-page-out:.16s;--dur-page-in:.22s;--dur-reward:.6s;--margin-offset:32px;--ruled-gap:28px;--graph-cell:8px;--bench-epoxy:#1d2229;--bench-oak:#b9926a;--bench-steel:#8a9199;--bench-glass:#cfe3ea;--z-base:0;--z-raised:1;--z-sticky:20;--z-header:30;--z-dropdown:40;--z-overlay:50;--z-drawer:60;--z-modal:70;--z-toast:80;--z-tooltip:90;--tap:44px;--icon:20px;--icon-sm:16px;--container:1184px;--gutter:clamp(16px, 3.2vw, 40px);--panel-w:420px;--rail-w:232px;--text-2xs:var(--text-xs);--text-2xl:2rem;--text-3xl:2.5rem;--step--1:var(--text-sm);--step-0:var(--text-md);--step-1:var(--text-lg);--step-2:var(--text-xl);--step-3:var(--text-2xl);--step-4:var(--text-3xl);--paper:var(--canvas);--surface:var(--surface-1);--site-wash:var(--wash);--site-wash-line:var(--wash-line);--site-link-line:var(--link-line);--cobalt:var(--focus-ring-color);--good:var(--success);--good-soft:var(--success-soft);--warn:var(--warning);--warn-soft:var(--warning-soft);--bad:var(--danger);--bad-soft:var(--danger-soft);--shadow:var(--elev-2)}[data-subject=physics]{--subject:var(--physics);--subject-soft:var(--physics-soft);--subject-text:var(--physics-text)}[data-subject=chemistry]{--subject:var(--chemistry);--subject-soft:var(--chemistry-soft);--subject-text:var(--chemistry-text)}[data-subject=biology]{--subject:var(--biology);--subject-soft:var(--biology-soft);--subject-text:var(--biology-text)}@media (prefers-reduced-motion:reduce){:root,[data-theme]{--dur-instant:0s;--dur-fast:0s;--dur-base:0s;--dur-slow:0s;--dur-slower:0s;--dur-pen:0s;--dur-page-out:0s;--dur-page-in:0s;--dur-reward:0s}}:-webkit-any(input[type=radio],input[type=checkbox],input[type=range],progress){accent-color:var(--accent)}:-moz-any(input[type=radio],input[type=checkbox],input[type=range],progress){accent-color:var(--accent)}:is(input[type=radio],input[type=checkbox],input[type=range],progress){accent-color:var(--accent)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) svg[data-brand] rect[fill=\#14213D i]{stroke:#fbf7ef52;stroke-width:4px}}:root[data-theme=dark] svg[data-brand] rect[fill=\#14213D i]{stroke:#fbf7ef52;stroke-width:4px}@font-face{font-family:JetBrains Mono Website;font-style:normal;font-weight:400 600;font-display:swap;src:url(./jetbrains-science.woff2)format("woff2")}@font-face{font-family:Caveat Website;font-style:normal;font-weight:600;font-display:swap;src:url(./caveat-notes.woff2)format("woff2")}:root,[data-theme]{--font-data:"JetBrains Mono Website", ui-monospace, SFMono-Regular, Consolas, monospace;--font-hand:"Caveat Website", "Segoe Print", "Bradley Hand", cursive}.sh-kicker{color:var(--ink-3);font:400 var(--text-kicker) / 1.35 var(--font-body);letter-spacing:0;text-transform:none;margin:0 0 12px;display:block}.sh-kicker--subject:before{content:"";vertical-align:1px;background:var(--subject,var(--ink));width:8px;height:8px;margin-right:8px;display:inline-block}.sh-kicker__sep{color:var(--ink-4);font-weight:400}.sh-fig{margin:0}.sh-fig__plate{border-radius:var(--radius-xs);outline:1px solid color-mix(in srgb, var(--ink) 10%, transparent);outline-offset:-1px;width:100%;height:auto;display:block}.sh-fig__cap{margin-top:var(--space-3);color:var(--ink-2);font:400 var(--text-sm) / 1.45 var(--font-body);text-wrap:pretty;display:block}.sh-fig__n{color:var(--ink);margin-right:.45em;font-weight:700}.sh-fig__code{color:var(--ink-3);font:400 .92em / 1 var(--font-data);font-variant-numeric:tabular-nums;margin-left:.35em}.sh-masthead{padding-bottom:var(--space-5);border-bottom:1px solid var(--rule-strong)}.ink-notes{--in-navy:#14213d;--in-paper:#fbf8f2;--in-line:var(--in-navy);--in-halo:#fbf8f2d9;z-index:1;pointer-events:none;position:absolute;top:0;bottom:0;left:0;right:0;container-type:inline-size}.ink-notes--paper{--in-line:var(--in-paper);--in-halo:#0a1022bf}.ink-notes--height{height:100%;top:0;bottom:0;left:0;right:auto}.ink-notes--cover{--in-w:max(100cqw, 100cqh * var(--in-ratio));--in-h:max(100cqw / var(--in-ratio), 100cqh);top:auto;bottom:auto;left:auto;right:auto;top:calc((100cqh - var(--in-h)) * var(--in-fy,.5));left:calc((100cqw - var(--in-w)) * var(--in-fx,.5));width:var(--in-w)}.ink-notes__lines{width:100%;height:100%;position:absolute;top:0;bottom:0;left:0;right:0;overflow:visible}.ink-notes__leader{fill:none;stroke:var(--in-line);stroke-width:1.25px;stroke-linecap:round;filter:drop-shadow(0 0 1px var(--in-halo))}.ink-notes__dot{background:var(--in-line);outline:1.5px solid var(--in-halo);border-radius:50%;width:6px;height:6px;margin:-3px 0 0 -3px;position:absolute}.ink-notes__labels{margin:0;padding:0;list-style:none}.ink-notes__label{padding-inline:var(--space-1);color:var(--in-line);font:var(--weight-semibold) var(--text-xs) / 1 var(--font-body);letter-spacing:.06em;text-transform:uppercase;white-space:nowrap;text-shadow:0 0 2px var(--in-halo), 0 0 6px var(--in-halo);position:absolute;transform:translateY(-50%)}.ink-notes__label[data-align=end]{transform:translate(-100%,-50%)}@container (width<=480px){.ink-notes__lines,.ink-notes__dot,.ink-notes__labels{display:none}}@media (prefers-reduced-motion:no-preference){@supports (animation-timeline:view()){.ink-notes{view-timeline:--ink-notes block}.ink-notes__leader{--dash:calc(var(--len,100) * 1cqw);stroke-dasharray:var(--dash);animation:linear both ink-notes-draw;animation-timeline:--ink-notes;animation-range:entry calc(30% + var(--i,0) * 12%) cover calc(40% + var(--i,0) * 6%)}.ink-notes__dot,.ink-notes__label{animation:linear both ink-notes-show;animation-timeline:--ink-notes;animation-range:entry calc(60% + var(--i,0) * 12%) cover calc(42% + var(--i,0) * 6%)}}}@keyframes ink-notes-draw{0%{stroke-dashoffset:var(--dash)}to{stroke-dashoffset:0}}@keyframes ink-notes-show{0%{opacity:0}to{opacity:1}}:root[data-reduced-motion=true] .ink-notes__leader,:root[data-reduced-motion=true] .ink-notes__dot,:root[data-reduced-motion=true] .ink-notes__label{animation:none}.dh-tes{gap:2px;margin:0;display:grid}.dh-tes a{width:-webkit-fit-content;width:-moz-fit-content;width:fit-content;color:inherit;text-underline-offset:2px;font-weight:600;text-decoration:underline}.dh-tes__note{font-size:var(--b-text-xs,.8125rem);line-height:1.4}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .ta{--ta-strength:16%}}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .ta--img .ta__ground{opacity:.92;background:radial-gradient(circle at 38% 32%, #f4f6fb, color-mix(in srgb, var(--ta-hue) 22%, #dfe5f0) 72%)}}@media (max-width:719.98px){.ta__glow{inset:calc(var(--space-5,24px) * -1) 0}}@media (forced-colors:active){.ta__ground,.ta__glow,.ta__shadow{display:none}.ta__obj{forced-color-adjust:none}}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:16px}body{background:var(--canvas);color:var(--ink);font:400 var(--text-md)/1.6 var(--font-body);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0}img,svg{max-width:100%}h1,h2,h3,h4{text-wrap:balance;margin:0}p{margin:0 0 12px}a{color:var(--accent-text);-webkit-text-decoration-color:var(--site-link-line);text-decoration-color:var(--site-link-line);text-underline-offset:3px;text-decoration-thickness:1px}a:hover{text-decoration-color:currentColor}:focus-visible{outline:var(--focus-ring-width) solid var(--focus-ring-color);outline-offset:2px;border-radius:var(--radius-xs)}button,input,select,textarea{font:inherit;color:inherit}[hidden]{display:none!important}.hub-sr{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;position:absolute!important}.hub-skip{z-index:10;background:var(--accent);color:var(--accent-ink);border-radius:var(--radius-s);padding:12px 16px;font-weight:600;position:absolute;top:-60px;left:12px}.hub-skip:focus{top:12px}.hub-header{z-index:var(--z-header);border-bottom:1px solid var(--line);background:var(--canvas);position:-webkit-sticky;position:sticky;top:0}.hub-header__in,.hub-crumbs,.hub-main,.hub-footer__in{max-width:var(--container);padding-left:var(--gutter);padding-right:var(--gutter);margin:0 auto}.hub-header__in{align-items:center;gap:var(--space-2) var(--space-4);min-height:64px;display:flex;position:relative}.hub-nav__lab{flex:none;min-height:40px}.hub-brand{border-radius:var(--radius-1);min-height:var(--tap);color:var(--ink);align-items:center;text-decoration:none;display:inline-flex}.hub-brand svg,.hub-footer__word svg{flex:none;display:block}.hub-nav>ul{align-items:center;gap:var(--space-1);margin:0;padding:0;list-style:none;display:flex}.hub-nav>ul>li>a,.hub-menu__sum{align-items:center;gap:var(--space-1);min-height:var(--tap);padding:0 var(--space-3);border-radius:var(--radius-1);color:var(--ink-2);font:400 var(--text-md) / 1 var(--font-body);white-space:nowrap;cursor:pointer;transition:color var(--dur-fast) var(--ease);text-decoration:none;display:inline-flex;position:relative}.hub-nav>ul>li>a:hover,.hub-menu__sum:hover,.hub-menu[open] .hub-menu__sum{color:var(--ink)}.hub-nav>ul>li>a.is-here,.hub-menu__sum.is-here{color:var(--ink);font-weight:600}.hub-nav>ul>li>a.is-here:after,.hub-menu__sum.is-here:after{content:"";left:var(--space-3);right:var(--space-3);background:var(--hl);height:2px;position:absolute;bottom:-10px}.hub-menu__sum::-webkit-details-marker{display:none}.hub-menu__sum{list-style:none}.hub-menu__chev{fill:none;stroke:currentColor;stroke-width:1.5px;stroke-linecap:round;stroke-linejoin:round}.hub-menu[open] .hub-menu__chev{transform:rotate(180deg)}.hub-menu__panel{z-index:calc(var(--z-header) + 1);width:400px;padding:var(--space-2);border:1px solid var(--line);border-radius:var(--radius-2);background:var(--canvas);box-shadow:var(--elev-3);position:absolute;top:calc(100% - 4px)}.hub-menu__list{margin:0;padding:0;list-style:none}.hub-menu__a{padding:var(--space-3);border-radius:var(--radius-1);color:var(--ink);transition:background var(--dur-fast) var(--ease);gap:2px;text-decoration:none;display:grid}.hub-menu__a:hover,.hub-menu__a[aria-current=page]{background:var(--surface-2)}.hub-menu__name{font:600 var(--text-md) / 1.3 var(--font-body)}.hub-menu__line{font-size:var(--text-sm);color:var(--ink-3);line-height:1.45}.hub-menu__more{gap:0 var(--space-4);margin:var(--space-2) 0 0;padding:var(--space-2) var(--space-3) var(--space-1);border-top:1px solid var(--line);font-size:var(--text-sm);flex-wrap:wrap;display:flex}.hub-menu__more a{min-height:36px;color:var(--ink-2);align-items:center;display:inline-flex}.hub-continue{flex:none}.hub-continue[hidden]{display:none}.hub-continue__a{align-items:center;gap:var(--space-1);min-height:40px;color:var(--ink);font-size:var(--text-sm);white-space:nowrap;font-weight:600;display:inline-flex}.hub-crumbs ol{font-size:var(--text-sm);color:var(--ink-3);flex-wrap:wrap;gap:4px 0;margin:0;padding:16px 0 0;list-style:none;display:flex}.hub-crumbs li+li:before{content:"/";color:var(--line-strong);margin:0 8px}.hub-crumbs a{color:var(--ink-2)}.hub-study-paths{border-top:1px solid var(--line-strong);border-bottom:1px solid var(--line);grid-template-columns:auto repeat(3,1fr);align-items:center;gap:16px 32px;margin-bottom:48px;padding:24px 0;display:grid}.hub-study-paths__label{color:var(--ink-2);font-size:var(--text-sm);margin:0}.hub-study-paths a{justify-content:space-between;align-items:center;gap:12px;min-height:44px;font-weight:600;display:flex}@media (max-width:760px){.hub-study-paths{grid-template-columns:1fr;gap:0;margin-bottom:32px;padding:12px 0}.hub-study-paths__label{padding:8px 0}.hub-study-paths a+a{border-top:1px solid var(--line)}}.hub-sec{scroll-margin-top:90px}@media (max-width:760px){.hub-sec{scroll-margin-top:16px}}.hub-main{outline:none;padding-top:24px;padding-bottom:64px}.hub-sheet{min-width:0;padding:24px 0 8px;position:relative}.hub-404{max-width:820px}.hub-404__scene{width:min(100%,200px);margin-bottom:var(--space-4)}.hub-faq{position:relative}.hub-prose>.hub-faq__scene.ta{width:112px;margin-bottom:var(--space-3,16px);grid-column:1/-1}@media (min-width:1000px){.hub-prose>.hub-faq__scene.ta{width:220px;margin:0;position:absolute;top:0;right:0}.hub-prose.hub-faq>.hub-lede{max-width:min(64ch,100% - 240px)}}.hub-404 .hub-lede{padding-bottom:var(--space-4)}.hub-404__popular{gap:var(--space-1) var(--space-5);margin:0 0 var(--space-5);grid-template-columns:repeat(auto-fill,minmax(14rem,1fr));padding:0;list-style:none;display:grid}.hub-404__popular a{align-items:center;min-height:44px;display:inline-flex}.hub-404__table{margin-top:8px}.hub-404__table th[scope=row]{white-space:nowrap}.hub-prose{grid-template-columns:minmax(0,15rem) minmax(0,66ch);align-items:start;column-gap:64px;max-width:none;margin:0;display:grid}.hub-prose>*{grid-column:2;min-width:0}.hub-prose>.hub-overline,.hub-prose>.hub-h1,.hub-prose>.hub-lede{grid-column:1/-1}.hub-prose>.hub-lede{border-bottom:1px solid var(--rule-strong,var(--ink));max-width:none;margin-bottom:16px;padding:0 max(0px,100% - 64ch) 24px 0}.hub-prose p{max-width:66ch}.hub-prose .hub-h2{border-top:1px solid var(--line);grid-column:1;margin:0;padding-top:32px;font-size:1.375rem;line-height:1.2}.hub-prose .hub-h2+*{border-top:1px solid var(--line);margin-top:0;padding-top:32px}.hub-prose>.hub-h2~*{margin-top:0}.hub-prose>:not(.hub-h2):not(.hub-overline):not(.hub-h1):not(.hub-lede)+:not(.hub-h2){margin-top:16px}.hub-prose>.hub-cta{margin-top:24px}.hub-prose>.hub-lede+.hub-h2,.hub-prose>.hub-lede+.hub-h2+*{border-top:0;padding-top:12px}@media (max-width:900px){.hub-prose{display:block}.hub-prose>.hub-lede{padding-right:0}.hub-prose .hub-h2{border-top:1px solid var(--line);margin-top:32px;padding-top:24px}.hub-prose .hub-h2+*{border-top:0;margin-top:12px;padding-top:0}}.hub-overline{font:600 var(--text-kicker,.875rem) / 1.35 var(--font-body);letter-spacing:0;text-transform:none;color:var(--ink-2);margin:0 0 12px;display:block}.hub-h1{font:var(--weight-h1,700) var(--text-h1) / 1.05 var(--font-head);letter-spacing:var(--tracking-display);margin:4px 0 16px}.hub-h2{font:var(--weight-h2,650) var(--text-h2) / 1.12 var(--font-head);letter-spacing:-.015em;align-items:baseline;gap:16px;margin:0 0 16px;display:flex}.hub-h2__n{min-width:2ch;font:400 var(--text-sm) / 1 var(--font-body);font-variant-numeric:tabular-nums;color:var(--ink-3);flex:none;transform:translateY(-3px)}.hub-h3{font:600 var(--text-lg) / 1.3 var(--font-body);margin:32px 0 12px}.hub-lede{font-size:var(--text-lg);color:var(--ink-2);max-width:var(--measure);line-height:1.5}.hub-lede--small{margin-top:var(--space-3);font-size:var(--text-md)}@media (max-width:640px){.hub-lede,.hp-lede{font-size:var(--text-md)}}.hub-meta,.hub-note{font-size:var(--text-sm);color:var(--ink-3)}.hub-note{max-width:72ch}.hub-cta{flex-wrap:wrap;gap:12px;margin:24px 0 4px;display:flex}.hub-btn{min-height:var(--tap);border-radius:var(--radius-1);font:600 var(--text-md)/1.2 var(--font-body);cursor:pointer;transition:background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);border:1px solid #0000;justify-content:center;align-items:center;gap:8px;padding:0 16px;text-decoration:none;display:inline-flex}.hub-btn--primary{background:var(--accent);color:var(--accent-ink)}.hub-btn--primary:hover{background:var(--accent-hover)}.hub-btn--quiet{color:var(--ink);border-color:var(--line-strong);background:0 0}.hub-btn--quiet:hover{border-color:var(--ink-3)}.hub-btn--block{width:100%}.hub-practical{grid-template-columns:minmax(0,1fr) 272px;align-items:start;gap:32px;display:grid}.hub-aside{gap:16px;display:grid;position:-webkit-sticky;position:sticky;top:20px}.hub-aside__card{border-top:1px solid var(--rule-strong,var(--ink));padding:16px 0 4px}.hub-aside__launch{min-height:var(--tap);color:var(--ink);text-decoration:underline;-webkit-text-decoration-color:var(--link-line);text-decoration-color:var(--link-line);text-underline-offset:4px;border:0;justify-content:flex-start;padding:0}.hub-aside__launch:hover{text-decoration-color:currentColor}.sp-tesline{font-size:var(--text-sm);color:var(--ink-2);margin:0}.sp-tesline a{color:inherit;-webkit-text-decoration-color:var(--link-line);text-decoration-color:var(--link-line);text-underline-offset:4px}.hub-aside__tes{margin:4px 0 16px}.hub-aside__card p{font-size:var(--text-sm);color:var(--ink-2)}.hub-aside__h{font:var(--weight-h2,600) var(--text-lg)/1.2 var(--font-head)!important;color:var(--ink)!important;margin-bottom:8px!important}.hub-aside__list{margin:0;padding:0;list-style:none}.hub-aside__list a{min-height:var(--tap);border-top:1px solid var(--page-line);color:var(--ink);font-size:var(--text-sm);align-items:baseline;gap:12px;padding:12px 0;text-decoration:none;display:flex}.hub-aside__list a:hover{color:var(--accent-text)}.hub-aside__n{font-family:var(--font-data);color:var(--ink-3);min-width:2ch}.hub-hero .hub-lede{max-width:64ch}.hub-hero .hub-meta{margin-bottom:0}.hub-launch{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);align-items:start;gap:32px;margin:32px 0 0;display:grid}.hub-launch--plain{grid-template-columns:minmax(0,1fr)}.hub-launch__still{margin:0;position:relative}.hub-launch__still img{aspect-ratio:16/10;object-fit:cover;background:var(--scene-bg)}.hub-launch__body{flex-direction:column;gap:16px;min-width:0;padding:0;display:flex}.hub-launch__head{justify-content:space-between;align-items:baseline;gap:12px;display:flex}.hub-launch__h{font:var(--weight-h2,650) 1.625rem/1.05 var(--font-head);letter-spacing:-.015em}.hub-launch__time{font-size:var(--text-sm);color:var(--ink-3);flex:none;margin:0}.hub-launch__steps{counter-reset:launch;border-top:1px solid var(--line);font-size:var(--text-sm);color:var(--ink-2);gap:0;margin:0;padding:0;line-height:1.45;list-style:none;display:grid}.hub-launch__steps li{border-bottom:1px solid var(--line);counter-increment:launch;padding:9px 0 9px 32px;position:relative}.hub-launch__steps li:before{content:counter(launch);color:var(--ink-3);font:400 var(--text-xs) / 1.45 var(--font-data);position:absolute;top:10px;left:0}.hub-launch__steps strong{color:var(--ink);font-weight:600}.hub-launch__note{font-size:var(--text-xs);color:var(--ink-3);margin:0;line-height:1.5}.hub-launch__cta{flex-wrap:wrap;align-items:center;gap:8px 16px;margin:2px 0 0;display:flex}.hub-btn--launch{min-height:52px;font-size:var(--text-md);padding:0 24px}.hub-btn--launch:after{content:"";border-top:1.6px solid;border-right:1.6px solid;width:7px;height:7px;margin-left:4px;transform:rotate(45deg)}.hub-launch__alt{font-size:var(--text-sm);color:var(--ink-2)}.hub-boundary{font-size:var(--text-sm);color:var(--ink);background:0 0;border:0;border-radius:0;max-width:76ch;margin:24px 0 0;padding:12px 16px}.hub-toc{border-top:1px solid var(--line);border-bottom:0;margin:32px 0 0;padding:16px 0 4px}.hub-toc__h{font:600 var(--text-sm) / 1.4 var(--font-body);color:var(--ink);margin-bottom:8px}.hub-toc ol{columns:3 200px;counter-reset:toc;column-gap:24px;margin:0;padding:0;list-style:none}.hub-toc li{counter-increment:toc;break-inside:avoid}.hub-toc a{min-height:36px;color:var(--ink);font-size:var(--text-sm);align-items:baseline;gap:12px;padding:8px 0;text-decoration:none;display:flex}.hub-toc a:before{content:counter(toc);font:400 var(--text-xs) / 1 var(--font-body);font-variant-numeric:tabular-nums;color:var(--ink-3);min-width:2ch}.hub-toc a:hover{text-decoration:underline}.hub-sec{border-top:1px solid var(--line);margin-top:48px;padding-top:32px}.hub-sec>p{max-width:72ch}.hub-eq{font:400 1.375rem/1.4 var(--font-body);letter-spacing:.02em;word-spacing:.12em;color:var(--ink);margin:0 0 16px;padding:8px 0;display:block}.hub-eq--inline{border:0;margin:0;padding:0;font-size:1.05em;display:inline}.hub-mono{font-family:var(--font-data);font-variant-numeric:tabular-nums;white-space:normal;overflow-wrap:anywhere}.hub-measure{grid-template-columns:minmax(0,1fr) minmax(0,300px);align-items:start;gap:24px 40px;display:grid}.hub-measure--eye{grid-template-columns:minmax(0,1fr)}.hub-measure__text>p{max-width:66ch;margin:0 0 12px}.hub-measure__ways{border-top:1px solid var(--line);max-width:66ch;margin:0 0 16px;padding:0;list-style:none}.hub-measure__ways li{border-bottom:1px solid var(--line);padding:12px 0}.hub-measure__how{font-size:var(--text-sm);color:var(--ink-2)}.hub-measure__k{color:var(--ink);font-weight:600}.hub-measure__pair{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;display:grid}.hub-closeup{min-width:0}.hub-closeup__plate{max-width:420px}.hub-measure__pair .hub-closeup__plate{max-width:none}.hub-practise{border-top:1px solid var(--rule-strong,var(--ink));margin-top:32px;padding:24px 0 4px}.hub-practise>p:not(.hub-cta),.hub-practise__facts{max-width:72ch}.hub-practise__h{font:var(--weight-h2,650) 1.375rem/1.2 var(--font-head);letter-spacing:-.01em;margin:0 0 12px}.hub-practise p{margin:0 0 12px}.hub-practise__facts{color:var(--ink-2);font-size:var(--text-sm);margin:0 0 8px;padding-left:1.2em}.hub-practise__facts li{padding:3px 0}.hub-practise .hub-cta{align-items:center}.hub-practise__more{font-size:var(--text-sm);margin-left:8px}@media (max-width:900px){.hub-measure{grid-template-columns:minmax(0,1fr)}}@media (max-width:640px){.hub-measure__pair{grid-template-columns:minmax(0,1fr)}}.hub-tablewrap{-webkit-overflow-scrolling:touch;background:linear-gradient(to right, var(--canvas), var(--canvas)) left center / 24px 100% no-repeat local, linear-gradient(to left, var(--canvas), var(--canvas)) right center / 24px 100% no-repeat local, linear-gradient(to right, color-mix(in srgb, var(--ink) 16%, transparent), transparent) left center / 16px 100% no-repeat scroll, linear-gradient(to left, color-mix(in srgb, var(--ink) 16%, transparent), transparent) right center / 16px 100% no-repeat scroll;margin:0 0 16px;position:relative;overflow-x:auto}.hub-tablewrap:focus-visible{outline-offset:4px}.hub-table{border-collapse:collapse;width:100%;font-size:var(--text-md);line-height:1.45}.hub-table caption{text-align:left;font:600 var(--text-sm) / 1.4 var(--font-body);color:var(--ink-2);padding:0 0 8px}.hub-table th,.hub-table td{border-bottom:1px solid var(--line);text-align:left;vertical-align:top;padding:12px 12px 12px 0}.hub-table thead th{font:600 var(--text-sm) / 1.35 var(--font-body);color:var(--ink-2);border-top:1px solid var(--rule-strong,var(--ink));border-bottom:1px solid var(--rule-strong,var(--ink));vertical-align:bottom}.hub-table tbody tr:last-child>*{border-bottom:1px solid var(--rule-strong,var(--ink))}.hub-table tbody th{font-weight:600}.hub-num{font-family:var(--font-data);font-variant-numeric:tabular-nums;white-space:nowrap;text-align:right!important}.hub-table thead th.hub-num{font-family:var(--font-body);white-space:normal}.hub-table--results td.hub-num,.hub-table--results th.hub-num{padding-left:16px}.hub-table--results td.hub-word{font-size:var(--text-sm)}.is-derived{color:var(--ink-2)}.is-ringed .hub-v{border:1.5px solid var(--pen);border-radius:50%;padding:0 7px;display:inline-block}.hub-was{color:var(--pencil);-webkit-text-decoration-color:var(--pen);text-decoration-color:var(--pen);text-decoration-thickness:1.5px}.is-marked td,.is-marked th{background:var(--accent-softer)}.hub-figure{margin:0 0 24px}.hub-figure figcaption{font-size:var(--text-sm);color:var(--ink-3);margin-top:8px}.hub-graph{max-width:720px}.hg{width:100%;height:auto;display:block}.hg-paper{fill:var(--page)}.hg-minor line{stroke:var(--graph-minor);stroke-width:.6px}.hg-major line{stroke:var(--graph-major);stroke-width:.9px}.hg-axis{stroke:var(--ink);stroke-width:1.4px}.hg-pt{stroke:var(--ink);stroke-width:1.8px;fill:none;stroke-linecap:round}.hg-line{stroke:var(--accent);stroke-width:2px;fill:none}.hg-tangent{stroke:var(--ink-2);stroke-width:1.6px;stroke-dasharray:6 4;fill:none}.hg-ring{stroke:var(--pen);stroke-width:1.6px;fill:none}.hg-bar{fill:var(--subject-soft,var(--accent-soft));stroke:var(--subject,var(--accent));stroke-width:1.4px}.hg-tick{fill:var(--ink-2);font:400 var(--text-xs) var(--font-data)}.hg-label{fill:var(--ink);font:600 var(--text-sm) var(--font-body)}.hg-key{flex-wrap:wrap;gap:4px 16px;margin:4px 0 0;padding:0;list-style:none;display:flex}.hg-key__mark{font-family:var(--font-data);color:var(--ink)}.hub-provenance{border:1px dashed var(--line-strong);border-radius:var(--radius-s);font-size:var(--text-sm);color:var(--ink-2);margin:0 0 24px;padding:16px}.hub-provenance p{margin-bottom:12px}.hub-provenance__facts{grid-template-columns:repeat(auto-fit,minmax(118px,1fr));gap:8px 16px;margin:0;display:grid}.hub-provenance__facts dt{font:600 var(--text-xs) / 1.3 var(--font-body);letter-spacing:0;text-transform:none;color:var(--ink-3)}.hub-provenance__facts dd{font-family:var(--font-data);color:var(--ink);margin:2px 0 0}.hub-pen-note{color:var(--pen);font-size:var(--text-sm)}.hub-pen-note strong{color:var(--ink)}.hub-results,.hub-values{gap:0;margin:0 0 24px;display:grid}.hub-results>div,.hub-values>div{border-bottom:1px solid var(--page-line);grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:16px;padding:12px 0;display:grid}.hub-results dt,.hub-values dt{color:var(--ink-2);font-size:var(--text-sm)}.hub-results dd,.hub-values dd{font-family:var(--font-data);font-size:var(--text-md);margin:0}.hub-results dd.hub-results__words{font-family:var(--font-body)}.hub-method{counter-reset:step;margin:0;padding:0;list-style:none}.hub-method>li{counter-increment:step;max-width:72ch;padding:0 0 16px 40px;position:relative}.hub-method>li:before{content:counter(step);border:1px solid var(--line-strong);border-radius:var(--radius-xs);width:26px;height:26px;font:400 var(--text-sm) / 1 var(--font-body);font-variant-numeric:tabular-nums;color:var(--ink-2);place-items:center;display:grid;position:absolute;top:1px;left:0}.hub-method--technique>li:before{content:"•";border:0}.hub-method p{margin-bottom:4px}.hub-method__t{font-weight:600}.hub-method__do{border-left:2px solid var(--accent);padding-left:12px}.hub-why{color:var(--ink-2);font-size:var(--text-sm)}.hub-why__k{font-variant:small-caps;letter-spacing:.04em;color:var(--ink-3);font-weight:600}.hub-tag{border:1px solid var(--warning);border-radius:var(--radius-xs);font:600 var(--text-xs) / 1.5 var(--font-body);color:var(--warning-text);vertical-align:2px;margin-left:8px;padding:1px 8px;display:inline-block}.hub-vars{margin:0}.hub-vars>div{border-bottom:1px solid var(--page-line);grid-template-columns:220px minmax(0,1fr);gap:16px;padding:12px 0;display:grid}.hub-vars dt{font-weight:600}.hub-vars dd{margin:0}.hub-vars ul{margin:0;padding-left:16px}.hub-vars li+li{margin-top:8px}.hub-mistakes{margin:0;padding:0;list-style:none}.hub-mistakes>li{border-bottom:1px solid var(--page-line);max-width:76ch;padding:16px 0}.hub-mistakes p{margin:0 0 4px}.hub-mistakes__what{font-weight:600}.hub-mistakes__where{color:var(--ink-3);font-weight:400;font-size:var(--text-sm)}.hub-mistakes__effect{color:var(--ink-2);font-size:var(--text-sm);padding-left:32px}.hub-mistakes__fix{padding-left:32px;position:relative}.hub-cross,.hub-tick{width:20px;color:var(--pen);font:700 1.05rem/1 var(--font-body);margin-right:8px;display:inline-block}.hub-mistakes__fix .hub-tick{position:absolute;top:2px;left:0}.hub-qs{margin:0;padding:0;list-style:none}.hub-q{border-top:1px solid var(--ink);margin:0 0 32px;padding-top:16px}.hub-q__head{align-items:baseline;gap:12px;margin-bottom:12px;display:flex}.hub-q__num{border:1.5px solid var(--ink);min-width:36px;height:32px;font:600 var(--text-md)/1 var(--font-data);place-items:center;padding:0 8px;display:inline-grid}.hub-q__topic{font-size:var(--text-sm);color:var(--ink-3);flex:1}.hub-q__marks{white-space:nowrap;font-weight:700}.hub-q__p{max-width:72ch}.hub-q__stem{font-weight:600}.hub-q__instr{font-size:var(--text-sm);color:var(--ink-2)}.hub-q__options{margin:0 0 12px;padding:0;list-style:none}.hub-q__options li{align-items:flex-start;gap:12px;padding:8px 0;display:flex}.hub-box{border:1.5px solid var(--ink);flex:none;width:20px;height:20px;margin-top:2px}.hub-q__answerline{margin:12px 0;font-weight:600}.hub-q__blank{border-bottom:1px dotted var(--ink-2);width:9em;display:inline-block}.hub-q__fig{margin:0 0 12px}.hub-q__svg svg{max-width:100%;height:auto}.hub-table--q{width:auto;min-width:50%}.hub-q__worked{border:1px solid var(--line);border-radius:var(--radius-s);background:var(--surface-1);margin-top:8px}.hub-q__worked>summary{min-height:var(--tap);color:var(--accent-text);cursor:pointer;align-items:center;gap:12px;padding:0 16px;font-weight:600;list-style:none;display:flex}.hub-q__worked>summary::-webkit-details-marker{display:none}.hub-q__worked>summary:before{content:"";width:8px;height:8px;transition:transform var(--dur-fast) var(--ease);border-bottom:2px solid;border-right:2px solid;transform:rotate(-45deg)}.hub-q__worked[open]>summary:before{transform:rotate(45deg)}.hub-q__answer{border-top:1px solid var(--line-subtle);padding:4px 16px 16px 24px}.hub-q__answer h4{font:600 var(--text-xs) / 1.4 var(--font-body);letter-spacing:0;text-transform:none;color:var(--ink-3);margin:16px 0 8px}.hub-scheme,.hub-slips,.hub-scheme__extra{margin:0 0 8px;padding:0;list-style:none}.hub-scheme li{gap:4px;padding:4px 0;display:flex}.hub-scheme__role,.hub-scheme__note{color:var(--ink-3);font-size:var(--text-sm)}.hub-scheme__extra li,.hub-slips li{font-size:var(--text-sm);color:var(--ink-2);padding:3px 0}.hub-slips__what{color:var(--ink);font-weight:600}.hub-q__lead{font-size:var(--text-sm);margin:0 0 4px;font-weight:600}.hub-levels td,.hub-levels th{font-size:var(--text-sm)}.hub-list,.hub-links{margin:0;padding-left:24px}.hub-list li,.hub-links li{max-width:72ch;padding:4px 0}.hub-links li{padding:8px 0}.hub-pager{border-top:1px solid var(--line);justify-content:space-between;gap:16px;margin-top:48px;padding-top:24px;display:flex}.hub-pager a{min-height:var(--tap);border:1px solid var(--line);border-radius:var(--radius-s);background:var(--page);color:var(--ink);flex-direction:column;gap:2px;max-width:48%;padding:12px 16px;text-decoration:none;display:flex}.hub-pager a:hover{border-color:var(--accent)}.hub-pager__next{text-align:right;margin-left:auto}.hub-pager__k{font-size:var(--text-xs);letter-spacing:0;text-transform:none;color:var(--ink-3)}.hub-pagehead{border-bottom:1px solid var(--rule-strong,var(--ink));padding:16px 0 24px}.hub-pagehead>*{max-width:820px}.hub-pagehead .hub-lede{margin-bottom:0}.hub-band{margin-top:64px}.hub-band__head{gap:4px;max-width:820px;margin-bottom:24px;display:grid}.hub-band__head p{color:var(--ink-2)}.hub-band--split{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);align-items:start;gap:32px;display:grid}.hub-band--split p{max-width:64ch}.hub-groups{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));align-items:start;gap:24px 40px;margin-top:32px;display:grid}.hub-groups--two{grid-template-columns:repeat(auto-fit,minmax(340px,1fr))}.hub-group{border-top:1px solid var(--ink);padding:16px 0 0}.hub-group__h{font:var(--weight-h2,650) 1.5rem/1.1 var(--font-head);letter-spacing:-.015em;margin:0 0 12px}.hub-group__h a{color:var(--ink);text-decoration:none}.hub-group__h a:hover{text-decoration:underline}.hub-plist{margin:0;padding:0;list-style:none}.hub-plist__a{min-height:var(--tap);border-top:1px solid var(--line);color:var(--ink);align-items:center;gap:12px;padding:8px 0;text-decoration:none;display:flex}.hub-plist__still{border-radius:var(--radius-xs);background:var(--surface-2);outline:1px solid color-mix(in srgb, var(--ink) 8%, transparent);outline-offset:-1px;flex:none;width:64px;height:40px;overflow:hidden}.hub-plist__still img{object-fit:cover;width:100%;height:100%;display:block}.hub-plist__a:hover .hub-plist__t{color:var(--accent-text);text-decoration:underline}.hub-plist__n{min-width:2ch;font:400 var(--text-sm) / 1 var(--font-body);font-variant-numeric:tabular-nums;color:var(--ink-3);flex:none}.hub-plist__t{flex:1}.hub-plist__m{font-size:var(--text-xs);color:var(--ink-3);white-space:nowrap}.hub-tools{margin:32px 0 0;padding:0;list-style:none}.hub-tools__a{border-bottom:1px solid var(--line);color:var(--ink);grid-template-columns:2.5rem minmax(0,1fr) minmax(0,.9fr);align-items:baseline;gap:4px 24px;padding:24px 0;text-decoration:none;display:grid}.hub-tools__n{font:400 var(--text-sm) / 1 var(--font-body);font-variant-numeric:tabular-nums;color:var(--ink-3)}.hub-tools__text{gap:4px;display:grid}.hub-tools__t{font:600 var(--text-lg) / 1.3 var(--font-body)}.hub-tools__a:hover .hub-tools__t{text-decoration:underline;-webkit-text-decoration-color:var(--link-line,currentColor);text-decoration-color:var(--link-line,currentColor);text-underline-offset:4px;text-decoration-thickness:1px}.hub-tools__d{max-width:46ch;font-size:var(--text-sm);color:var(--ink-2)}.hub-tools__eg{border-radius:var(--radius-1);background:var(--surface-2);font:400 var(--text-md)/1.4 var(--font-data);font-variant-numeric:tabular-nums;color:var(--ink);justify-self:start;padding:8px 12px}.hub-tools__eg s,.hub-tools__to{color:var(--ink-3)}@media (max-width:760px){.hub-tools__a{grid-template-columns:2rem minmax(0,1fr)}.hub-tools__eg{grid-column:2;margin-top:8px}}.hub-chips ul{gap:0 var(--space-5);margin:var(--space-4) 0 0;border-bottom:1px solid var(--line);flex-wrap:wrap;padding:0;list-style:none;display:flex}.hub-chips a{min-height:var(--tap);color:var(--ink-2);font-size:var(--text-md);border-bottom:2px solid #0000;align-items:center;margin-bottom:-1px;text-decoration:none;display:inline-flex}.hub-chips a:hover{color:var(--ink)}.hub-chips a[aria-current=page]{color:var(--ink);border-bottom-color:var(--ink);font-weight:600}.hub-tool .hub-sec{margin-top:32px}.hub-form{border-top:1px solid var(--line);flex-wrap:wrap;align-items:flex-end;gap:12px 16px;max-width:760px;margin:32px 0 8px;padding:24px 0 0;display:flex}.hub-form__h{font:600 1.25rem/1.2 var(--font-head);flex-basis:100%;margin:12px 0 0}.hub-field{flex:260px;gap:8px;min-width:0;display:grid}.hub-field--short{flex:130px;max-width:220px}.hub-field label,.hub-pt legend,.hub-radios legend,.hub-picks legend{font-weight:600;font-size:var(--text-sm)}.hub-field input,.hub-field select,.hub-field textarea{width:100%;min-height:var(--tap);background:var(--surface-1);border:1px solid var(--line-strong);border-radius:var(--radius-m);transition:border-color var(--dur-fast) var(--ease);padding:9px 12px}.hub-field input:hover,.hub-field select:hover,.hub-field textarea:hover{border-color:var(--ink-3)}.hub-field textarea{resize:vertical;line-height:1.5}.hub-field input[inputmode=decimal],.hub-field textarea{font-family:var(--font-data)}.hub-field input:focus-visible{outline:var(--focus-ring-width) solid var(--focus-ring-color);outline-offset:2px;border-color:var(--ink-3)}.hub-field select:focus-visible{outline:var(--focus-ring-width) solid var(--focus-ring-color);outline-offset:2px;border-color:var(--ink-3)}.hub-field textarea:focus-visible{outline:var(--focus-ring-width) solid var(--focus-ring-color);outline-offset:2px;border-color:var(--ink-3)}.hub-hint{font-size:var(--text-sm);color:var(--ink-3);margin:0}.hub-pt,.hub-radios,.hub-picks{border:0;flex-wrap:wrap;gap:12px;min-width:0;margin:0;padding:0;display:flex}.hub-pt legend,.hub-radios legend,.hub-picks legend{float:left;width:100%;margin:0 0 2px;padding:0}.hub-pt{flex:260px}.hub-radios{flex-direction:column;flex:260px;gap:4px}.hub-radios label,.hub-pick{min-height:var(--tap);cursor:pointer;align-items:center;gap:8px;display:inline-flex}.hub-radios input,.hub-pick input{width:20px;height:20px;accent-color:var(--accent)}.hub-picks{border-top:1px solid var(--line);max-width:760px;margin-top:16px;padding-top:16px}.hub-picks__list{flex-wrap:wrap;gap:4px 24px;display:flex}.hub-pick__v{font-family:var(--font-data)}.hub-out{max-width:760px;display:block}.hub-out.is-shown{border-top:1px solid var(--rule-strong,var(--ink));margin:16px 0 24px;padding:16px 0 4px}.hub-out.is-error{border-top-color:var(--danger);color:var(--danger-text)}.hub-out p:last-child,.hub-out ul:last-child{margin-bottom:0}.hub-out__big{flex-wrap:wrap;align-items:baseline;gap:8px 12px;display:flex}.hub-out__k{color:var(--ink-2)}.hub-out__v{font:600 1.6rem/1.2 var(--font-data);color:var(--ink);background:linear-gradient(to bottom, transparent 50%, var(--hl,transparent) 50%, var(--hl,transparent) 92%, transparent 92%);padding:0 .12em}:root[data-theme=dark] .hub-out__v{background:linear-gradient(to bottom, transparent 50%, color-mix(in srgb, var(--hl) 50%, transparent) 50%, color-mix(in srgb, var(--hl) 50%, transparent) 92%, transparent 92%)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .hub-out__v{background:linear-gradient(to bottom, transparent 50%, color-mix(in srgb, var(--hl) 50%, transparent) 50%, color-mix(in srgb, var(--hl) 50%, transparent) 92%, transparent 92%)}}.hub-working,.hub-notes{margin:4px 0 8px;padding-left:24px}.hub-working li{font-family:var(--font-data);font-size:var(--text-md);padding:2px 0}.hub-notes li{font-size:var(--text-sm);color:var(--ink-2);padding:2px 0}.hub-digits{flex-wrap:wrap;gap:2px;margin:8px 0 12px;display:flex}.hub-digit{text-align:center;min-width:.9em;font:400 2rem/1.2 var(--font-data);border-bottom:3px solid #0000;padding:0 3px 2px;display:inline-block}.hub-digit--significant,.hub-digit--captive-zero,.hub-digit--trailing-zero{color:var(--ink);border-bottom-color:var(--accent)}.hub-digit--leading-zero{color:var(--ink-3);border-bottom:3px dotted var(--ink-3)}.hub-digit--trailing-zero-ambiguous{color:var(--warning-text);border-bottom:3px dashed var(--warning)}.hub-digit--point,.hub-digit--sign{color:var(--ink-3);min-width:.5em}.hub-legend{font-size:var(--text-sm);color:var(--ink-2);flex-wrap:wrap;gap:4px 24px;margin:0 0 8px;padding:0;list-style:none;display:flex}.hub-legend .hub-digit{margin-right:4px;font-size:1.1rem}.hub-cards{grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:24px;margin-top:16px;display:grid}.hub-card{background:var(--page);border:1px solid var(--line);border-top:3px solid var(--subject,var(--accent));border-radius:var(--radius-s);font-size:var(--text-sm);padding:16px 24px;position:relative}.hub-card p{margin-bottom:8px}.hub-card__t{font:600 1.3125rem/1.1 var(--font-head);margin-bottom:8px}.hub-card__t a{color:var(--ink);text-decoration:none}.hub-card__aim{color:var(--ink-2)}.hub-card__eqline{display:block}.hub-card__vars{margin:0 0 8px}.hub-card__vars>div{border-bottom:1px solid var(--page-line);grid-template-columns:110px 1fr;gap:8px;padding:4px 0;display:grid}.hub-card__vars dt{font-weight:600}.hub-card__vars dd{margin:0}.hub-card__steps{margin:8px 0;padding-left:24px}.hub-printable__intro{margin:8px 0 16px}.hub-printable .rp-viewer--inline{border-radius:var(--radius-m);border:1px solid var(--line)}.hub-boundary--print{max-width:210mm;margin:16px auto 0}.hub-footer{margin-top:var(--space-8);border-top:1px solid var(--line);padding:var(--space-8) 0 var(--space-7);font-size:var(--text-sm);color:var(--ink-2);line-height:1.5}.hub-footer p{max-width:76ch}.hub-footer__in{gap:var(--space-6) var(--space-8);grid-template-columns:minmax(0,1fr) minmax(0,2fr);display:grid}.hub-footer__word{margin-bottom:var(--space-3);color:var(--ink)}.hub-footer__cols{gap:var(--space-5) var(--space-6);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.hub-footer__head{margin:0 0 var(--space-2);font:600 var(--text-sm) / 1.4 var(--font-body);color:var(--ink)}.hub-footer__cols ul{margin:0;padding:0;list-style:none}.hub-footer__cols li{align-items:center;gap:0 var(--space-2);flex-wrap:wrap;min-height:36px;display:flex}.hub-footer__cols a{color:var(--ink-2);text-decoration:none}.hub-footer__cols a:hover{color:var(--ink);text-decoration:underline}.hub-footer__note{color:var(--ink-3)}.hub-footer__small{padding-top:var(--space-5);border-top:1px solid var(--line);font-size:var(--text-xs);color:var(--ink-3);grid-column:1/-1}.hub-footer__small p{margin-bottom:var(--space-2)}.hub-note--status{max-width:64ch;color:var(--ink-2);background:0 0;border:0;align-items:baseline;gap:12px;margin:8px 0 0;padding:0;display:inline-flex}.hub-note--status:before{content:"";background:var(--hl,var(--warning));flex:none;width:8px;height:8px;transform:translateY(-1px)}.hub-book{--book:#14213d;--edge:var(--book);--paper-ink:#14213d;--w:132px;width:var(--w);aspect-ratio:210/297;padding:calc(var(--w) * .1) calc(var(--w) * .09) calc(var(--w) * .08) calc(var(--w) * .15);color:var(--paper-ink);transition:transform var(--dur-fast) var(--ease);background:#fbf7ef;border-radius:1px 3px 3px 1px;flex-direction:column;flex:none;display:flex;position:relative;overflow:hidden;box-shadow:inset 0 0 0 1px #14213d1a,0 1px 1px #14213d1f,0 10px 22px -14px #14213d73;container-type:inline-size}.hub-book[data-subject=physics]{--edge:var(--violet-600)}.hub-book[data-subject=chemistry]{--edge:var(--teal-600)}.hub-book[data-subject=biology]{--edge:var(--leaf-600)}.hub-book:before{content:"";background:var(--edge);pointer-events:none;width:max(3px,4cqw);position:absolute;top:0;bottom:0;left:0}.hub-book__kind{font:600 6.4cqw / 1.25 var(--font-body);color:#3e4a62}.hub-book__title{font:750 11.5cqw / 1.02 var(--font-head);letter-spacing:-.02em;-webkit-line-clamp:4;text-wrap:balance;-webkit-box-orient:vertical;margin-top:4cqw;display:-webkit-box;overflow:hidden}.hub-book__grid{background-color:#fff;background-image:linear-gradient(90deg,#14213d29 1px,#0000 1px),linear-gradient(#14213d29 1px,#0000 1px),linear-gradient(90deg,#14213d0f 1px,#0000 1px),linear-gradient(#14213d0f 1px,#0000 1px);background-position:-1px -1px;background-size:20cqw 20cqw,20cqw 20cqw,4cqw 4cqw,4cqw 4cqw;flex:1;min-height:0;margin:8cqw 0 7cqw;position:relative;box-shadow:inset 1.5px -1.5px #14213d}.hub-book__plot{fill:none;stroke:#14213d;stroke-width:1.6px;vector-effect:non-scaling-stroke;width:84%;height:84%;position:absolute;top:8%;bottom:8%;left:8%;right:8%}.hub-book__grid:before,.hub-book__grid:after{color:#14213d;position:absolute}.hub-book[data-kind=paper] .hub-book__grid{box-shadow:none;background-image:repeating-linear-gradient(#0000 0,#0000 8.5cqw,#14213d47 8.5cqw,#14213d47 calc(8.5cqw + 1px));background-size:auto}.hub-book[data-kind=paper] .hub-book__grid:after{content:"[4]";font:400 7.5cqw / 1 var(--font-data);color:#14213d;background:0 0;top:auto;bottom:6%;left:auto;right:4%}.hub-book[data-kind=paper] .hub-book__grid:before{content:"01.2";font:600 7.5cqw / 1 var(--font-data);top:2%;left:0}.hub-book[data-kind=revision] .hub-book__grid,.hub-book[data-kind=tutor] .hub-book__grid{background-image:linear-gradient(90deg,#0000 0,#0000 46%,#14213d80 46%,#14213d80 calc(46% + 1px),#0000 calc(46% + 1px)),repeating-linear-gradient(#0000 0,#0000 7cqw,#14213d24 7cqw,#14213d24 calc(7cqw + 1px));background-repeat:no-repeat,repeat;background-size:100% 34%,auto;box-shadow:inset 0 0 0 1px #14213d59}.hub-book[data-kind=revision] .hub-book__grid:after,.hub-book[data-kind=tutor] .hub-book__grid:after{content:"";background:#14213d59;height:1px;top:34%;bottom:auto;left:0;right:0}.hub-book[data-kind=revision] .hub-book__grid:before,.hub-book[data-kind=tutor] .hub-book__grid:before{content:"→";font:400 9cqw / 1 var(--font-data);top:9%;left:40%}.hub-book[data-kind=teacher-pack] .hub-book__grid{box-shadow:none;background-image:linear-gradient(#14213d 0,#14213d 1.5px,#0000 1.5px),repeating-linear-gradient(#0000 0,#0000 9cqw,#14213d33 9cqw,#14213d33 calc(9cqw + 1px)),linear-gradient(90deg,#0000 0,#0000 40%,#14213d33 40%,#14213d33 calc(40% + 1px),#0000 calc(40% + 1px));background-position:0 9cqw,0 0,0 0;background-repeat:no-repeat,repeat,no-repeat;background-size:100% 100%,auto,100% 100%}.hub-book__foot{font:400 5.6cqw / 1.2 var(--font-data);color:#3e4a62}.hub-book--s{--w:76px;padding:calc(var(--w) * .1) calc(var(--w) * .08) calc(var(--w) * .08) calc(var(--w) * .17)}.hub-book--s .hub-book__kind,.hub-book--s .hub-book__foot{display:none}.hub-book--s .hub-book__title{-webkit-line-clamp:3;margin-top:0;font-size:15cqw}.hub-book--s .hub-book__grid{margin:8cqw 0 2cqw}.hub-book--m{--w:132px}.hub-book--l{--w:300px;border-radius:1px 4px 4px 1px}.hub-book--img{background:#fff;padding:0}.hub-book--img img{object-fit:contain;object-position:top;width:100%;height:100%;padding:7% 6% 6% 10%;display:block}.hub-book--img:before{z-index:1}.hub-shelf{border-top:1px solid var(--line);margin-top:32px;padding-top:24px}.hub-band__head+.hub-shelf{margin-top:8px}.hub-shelf>.hub-h3{font:600 1.4375rem/1.1 var(--font-head);letter-spacing:var(--tracking-display);margin:0 0 4px}.hub-shelf>.hub-note{margin-bottom:16px}.hub-products{grid-template-columns:repeat(auto-fill,minmax(min(330px,100%),1fr));gap:0 40px;margin:0;padding:0;list-style:none;display:grid}.hub-product__a{border-top:1px solid var(--line);height:100%;color:var(--ink);align-items:flex-start;gap:24px;padding:24px 0;text-decoration:none;display:flex}.hub-product__a:hover .hub-book{transform:translateY(-2px)}.hub-product__a:hover .hub-product__t{text-decoration:underline;-webkit-text-decoration-color:var(--link-line,currentColor);text-decoration-color:var(--link-line,currentColor);text-underline-offset:4px;text-decoration-thickness:1px}.hub-product__body{flex-direction:column;gap:4px;min-width:0;display:flex}.hub-product__kind{font:600 var(--text-sm) / 1.4 var(--font-body);color:var(--ink-2)}.hub-product__t{font:var(--weight-h2,650) 1.25rem/1.15 var(--font-head);letter-spacing:-.012em}.hub-product__d{font-size:var(--text-sm);color:var(--ink-2);line-height:1.5}.hub-plist--products li>.hub-plist__a{flex-direction:column;align-items:stretch;gap:1px;padding:9px 0 9px 24px;position:relative}.hub-plist--products li>.hub-plist__a:before{content:"";background:linear-gradient(90deg, var(--subject,var(--ink)) 0 2px, #fbf7ef 2px);border-radius:1px;width:11px;height:15px;position:absolute;top:13px;left:2px;box-shadow:inset 0 0 0 1px #14213d40}.hub-plist--products .hub-plist__m{white-space:normal}.hub-productpage{grid-template-columns:300px minmax(0,1fr);align-items:start;gap:48px;display:grid}.hub-productpage__cover{padding:8px 0 24px;position:-webkit-sticky;position:sticky;top:24px}.hub-productpage__cover:after{content:none}.hub-productpage__main{min-width:0;max-width:68ch}.hub-productpage__main>.hub-h3{border-top:1px solid var(--page-line);margin-top:32px;padding-top:16px}.hub-buybox{border:1px solid var(--line);border-radius:var(--radius-2);background:var(--canvas);justify-items:start;gap:12px;margin:24px 0 8px;padding:16px 24px;display:grid}.hub-buybox p{margin:0}.hub-buybox__status{font-size:var(--text-sm);color:var(--ink-2);align-items:baseline;gap:12px;display:flex}.hub-buybox__status:before{content:"";background:var(--hl,var(--warning));flex:none;width:8px;height:8px;transform:translateY(-1px)}.hub-dl{border-top:1px solid var(--page-line);margin:0 0 16px}.hub-dl>div{border-bottom:1px solid var(--page-line);grid-template-columns:9rem minmax(0,1fr);gap:4px 24px;padding:12px 0;display:grid}.hub-dl dt{font:600 var(--text-sm) / 1.6 var(--font-body);color:var(--ink-2)}.hub-dl dd{margin:0}.hub-dl__line{display:block}.hub-dl__line+.hub-dl__line{margin-top:4px}.hub-list{padding-left:0;list-style:none}.hub-list>li{padding:5px 0 5px 24px;position:relative}ul.hub-list>li:before{content:"";background:var(--ink-3);width:10px;height:1.5px;position:absolute;top:.95em;left:2px}ol.hub-list{counter-reset:hub-list}ol.hub-list>li{counter-increment:hub-list}ol.hub-list>li:before{content:counter(hub-list) ".";font:400 var(--text-sm) / 1.6rem var(--font-body);font-variant-numeric:tabular-nums;color:var(--ink-3);position:absolute;top:5px;left:0}.hub-list--steps{gap:16px;margin:8px 0;display:grid}ol.hub-list--steps>li{border:0;border-bottom:1px solid var(--line);background:0 0;border-radius:0;max-width:none;padding:16px 0 16px 32px}ol.hub-list--steps>li:first-child{border-top:1px solid var(--line)}.hub-prose>.hub-h2+ol.hub-list--steps{padding-top:var(--space-4);gap:0}.hub-prose>.hub-h2+ol.hub-list--steps>li:first-child{border-top:0}.hub-prose>.hub-h2+ol.hub-list--steps>li:last-child{border-bottom:0}ol.hub-list--steps>li:before{content:counter(hub-list);font:600 var(--text-md) / 1.55 var(--font-body);font-variant-numeric:tabular-nums;color:var(--ink);top:16px;left:0}ol.hub-list--steps>li strong{font:600 var(--text-md) / 1.4 var(--font-body);margin-bottom:2px;display:block}.hub-list--links>li{border-bottom:1px solid var(--page-line);padding:12px 0 12px 24px}.hub-list--links>li:first-child{border-top:1px solid var(--page-line)}ul.hub-list--links>li:before{top:1.3em}.hub-pack{color:var(--ink);align-items:flex-start;gap:16px;padding:4px 0 2px;text-decoration:none;display:flex}.hub-pack .hub-book{--w:64px}.hub-pack:hover .hub-book{transform:translateY(-2px)rotate(-1.5deg)}.hub-pack__body{flex-direction:column;gap:4px;min-width:0;display:flex}.hub-pack__t{font-weight:600;line-height:1.3}.hub-pack:hover .hub-pack__t{color:var(--accent-text);text-decoration:underline}.hub-pack__d{font-size:var(--text-sm);color:var(--ink-2);line-height:1.45}.hub-aside__card .hub-pack__more{border-top:1px solid var(--page-line);margin:12px 0 0;padding-top:12px}.hub-hero__go{margin:var(--space-5) 0 0;display:none}@media (max-width:1100px){.hub-hero__go{display:block}.hub-practical{grid-template-columns:minmax(0,1fr)}.hub-aside{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));position:static}}@media (max-width:900px){.hub-band--split,.hub-footer__in{grid-template-columns:minmax(0,1fr)}.hub-productpage{grid-template-columns:minmax(0,1fr);gap:8px}.hub-productpage__cover{padding:0 0 8px;position:static}.hub-productpage__cover .hub-book--l{--w:180px}.hub-productpage__cover:after{width:192px}}@media (max-width:760px){.hub-header{position:static}.hub-header__in{gap:0 var(--space-3);min-height:0;padding-top:var(--space-2);grid-template-columns:minmax(0,1fr) auto;display:grid}.hub-header__in>.hub-nav{margin:var(--space-1) calc(var(--gutter) * -1) 0;padding:0 calc(var(--gutter) - var(--space-3));border-top:1px solid var(--line);grid-area:2/1/auto/-1}.hub-nav>ul{justify-content:space-between;gap:0}.hub-nav>ul>li>a.is-here:after,.hub-menu__sum.is-here:after{bottom:0}.hub-nav__lab{grid-area:1/2}.hub-menu__panel{top:100%;left:var(--space-2);right:var(--space-2);width:auto;max-height:75vh;overflow-y:auto}.hub-continue{margin:0 calc(var(--gutter) * -1);padding:0 var(--gutter);border-top:1px solid var(--line);grid-area:3/1/auto/-1}}@media (max-width:640px){.hub-nav>ul{flex-wrap:wrap;justify-content:flex-start}.hub-sheet{padding:16px 0 8px}.hub-brand__sub{display:none}.hub-nav>ul>li>a,.hub-menu__sum{padding:0 var(--space-2)}.hub-vars>div,.hub-results>div,.hub-values>div{grid-template-columns:minmax(0,1fr);gap:4px}.hub-sec{margin-top:32px;padding-top:24px}.hub-table{font-size:var(--text-sm)}.hub-table--risk thead{display:none}.hub-table--risk tr{border-bottom:1px solid var(--page-line);padding:12px 0;display:block}.hub-table--risk th,.hub-table--risk td{border:0;padding:2px 0;display:block}.hub-table--risk td:first-of-type:before{content:"Harm: ";color:var(--ink-3);font-weight:600}.hub-table--risk td:nth-of-type(2):before{content:"Control: ";color:var(--ink-3);font-weight:600}.hub-pager{flex-direction:column}.hub-pager a{max-width:none}.hub-pager__next{text-align:left;margin-left:0}.hub-cards,.hub-groups,.hub-groups--two{grid-template-columns:minmax(0,1fr)}.hub-q__head{flex-wrap:wrap}.hub-footer__cols{grid-template-columns:repeat(2,minmax(0,1fr))}.hub-launch{grid-template-columns:minmax(0,1fr);margin-top:16px}.hub-launch__still img{aspect-ratio:16/7;min-height:0}.hub-launch__body{gap:12px;padding:0}.hub-launch__h{font-size:1.5rem}.hub-launch__steps{grid-template-columns:1fr 1fr;gap:0 16px}.hub-launch__steps li{padding-left:24px}.hub-launch__more{display:none}.hub-launch__cta{order:1}.hub-launch__steps{order:2}.hub-launch__note{order:3}.hub-launch__cta .hub-btn--launch{width:100%}.hub-launch__alt{display:none}.hub-product__a{gap:16px;padding:16px}.hub-product__a .hub-book--s{--w:64px}.hub-product__t{font-size:1.25rem}.hub-dl>div{grid-template-columns:minmax(0,1fr);gap:0}ol.hub-list--steps>li{padding:12px 0 12px 40px}ol.hub-list--steps>li:before{left:0}.hub-note--status{display:flex}}@media (forced-colors:active){.hub-btn{border:1px solid buttontext}.hub-book{border:1px solid canvastext}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}@media print{body{color:#000;background:#fff;font-size:10.5pt}.hub-header,.hub-footer,.hub-crumbs,.hub-aside,.hub-cta,.hub-toc,.hub-pager,.hub-noprint,.hub-buybox,.hub-launch,.hub-skip,.hub-q__worked>summary{display:none!important}.hub-main{max-width:none;padding:0}.hub-practical{display:block}.hub-sheet{padding:0}.hub-sec,.hub-q,.hub-figure,.hub-card{break-inside:avoid}.hub-cards{display:block}.hub-card{border:1px solid #999;margin:0 0 8mm}a{color:inherit;text-decoration:none}}.hub-draft{border:1px solid var(--warning);border-radius:var(--radius-1);max-width:72ch;color:var(--ink);border-left-width:6px;margin:16px 0;padding:12px 16px}.hub-quote{color:var(--ink-2);margin:16px 0;padding:4px 0;font-style:italic}.hub-pass-code{border:1px solid var(--line-strong);border-radius:var(--radius-1);font:600 var(--text-md)/1.6 var(--font-data);letter-spacing:.02em;word-break:break-all;-webkit-user-select:all;-moz-user-select:all;user-select:all;margin:8px 0 16px;padding:16px}.hub-pricing__head .hub-h1{max-width:24ch}.hub-prices{gap:var(--space-5) var(--space-6);margin:var(--space-6) 0 0;grid-template-columns:repeat(3,minmax(0,1fr));padding:0;list-style:none;display:grid}.hub-prices>li{padding-top:var(--space-4);border-top:1px solid var(--ink)}.hub-prices__name{margin:0 0 var(--space-2);font:600 var(--text-md) / 1.4 var(--font-body)}.hub-prices__amount{margin:0 0 var(--space-2);font:600 var(--text-h1) / 1.1 var(--font-head);letter-spacing:-.02em;font-variant-numeric:lining-nums tabular-nums}.hub-prices__per{font:400 var(--text-md) / 1.4 var(--font-body);letter-spacing:0;color:var(--ink-3)}.hub-prices__line{max-width:34ch;font-size:var(--text-sm);color:var(--ink-2);margin:0}.hub-prices__note{margin:var(--space-4) 0 0;font-size:var(--text-sm);color:var(--ink-3)}.hub-pricing__h2{margin-top:var(--space-8)}.hub-pricing__more{margin-top:var(--space-7)}@media (max-width:760px){.hub-prices{grid-template-columns:minmax(0,1fr)}}.hub-founding__status{margin:0;font-weight:600}.hub-founding__code{font-size:var(--text-xl,1.5rem);letter-spacing:.06em;word-break:normal;margin:8px 0 16px;padding:12px 24px;display:inline-block}.hub-founding__codes{max-width:28rem;margin-top:16px}.hub-founding__codes caption{color:var(--ink-3);font-weight:400}.hub-founding__codes tr.is-now th,.hub-founding__codes tr.is-now td{font-weight:700}.hub-founding__codes tr.is-now th:after{content:" (now)";color:var(--ink-3);font-weight:400}.hub-fixes{margin:0;padding:0;list-style:none}.hub-fix{padding:0 0 24px}.hub-fix+.hub-fix{border-top:1px solid var(--line);padding-top:24px}.hub-fix__meta{font-size:var(--text-sm);color:var(--ink-3);flex-wrap:wrap;gap:4px 12px;margin:0 0 4px;display:flex}.hub-fix__meta time{font-family:var(--font-data);font-variant-numeric:tabular-nums}.hub-fix__area:before{content:"·";margin-right:12px}.hub-fix__t{font:600 var(--text-lg) / 1.3 var(--font-body);margin:0 0 4px}.hub-fix__d{margin:0}.hub-plate{margin:0 0 var(--space-6);position:relative}.hub-plate img{border-radius:var(--radius-0);width:100%;height:auto;display:block}.hub-prose>.hub-plate{grid-column:1/-1}.hub-plate--scene img{aspect-ratio:5/2;object-fit:cover;height:auto}@media (max-width:799px){.hub-plate--scene img{aspect-ratio:4/3}}.sh-cover{object-fit:cover;object-position:50% 50%}:root[data-theme=dark] .sh-cover{filter:brightness(.86)saturate(.94)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .sh-cover{filter:brightness(.86)saturate(.94)}}.hub-practical__fine{max-width:72ch;margin:var(--space-6,32px) auto 0;padding:0 var(--space-4,16px);color:var(--ink-3);font-size:var(--text-sm,.875rem);text-align:center}@media (pointer:coarse){.hub-table :-webkit-any(td,th)>a{align-items:center;min-height:44px;display:inline-flex}.hub-table :-moz-any(td,th)>a{align-items:center;min-height:44px;display:inline-flex}.hub-table :is(td,th)>a{align-items:center;min-height:44px;display:inline-flex}}.hub-header__in{gap:12px 24px;min-height:76px}.hub-header__in>.hub-nav{margin-left:auto;margin-right:auto}.hub-nav>ul{gap:4px}.hub-nav>ul>li>a,.hub-menu__sum{padding-left:12px;padding-right:12px;font-size:13px;font-weight:550}.hub-nav>ul>li>a[aria-current=page]{font-weight:700}.hub-nav>ul>li>a[aria-current=page]:after{content:"";background:var(--hl);height:2px;position:absolute;bottom:-10px;left:12px;right:12px}.hub-nav__lab{min-height:var(--tap);padding-inline:var(--space-4);gap:var(--space-4);background:var(--surface-1);border-color:var(--line);border-radius:var(--radius-1);color:var(--ink);font-size:13px}.hub-nav__lab:hover{background:var(--surface-2);border-color:var(--line-strong);color:var(--ink)}.hub-menu__panel{border-radius:8px;max-height:calc(100dvh - 100px);padding:12px;top:calc(100% - 8px);overflow-y:auto;box-shadow:0 16px 40px #0a162a1f}.hub-subjects__panel,.hub-resources__panel{width:330px}.hub-menu__heading{letter-spacing:.035em;color:var(--ink-3);margin:0;padding:12px 14px;font-size:11px;font-weight:600}.hub-menu__a{border-radius:4px;min-height:46px;padding:13px 14px}.hub-menu__name{justify-content:space-between;gap:12px;font-size:15px;display:flex}.hub-menu__name>span{color:var(--ink-3);font-weight:400}.hub-menu__line{margin-top:3px;font-size:12px}.hub-subject-links{border-top:1px solid var(--line);margin-top:8px;padding:14px 14px 4px}.hub-subject-links>span{color:var(--ink-3);font-size:11px}.hub-subject-links>div{flex-wrap:wrap;gap:8px 20px;margin-top:2px;display:flex}.hub-subject-links a{min-height:44px;color:var(--ink);text-underline-offset:4px;align-items:center;font-size:13px;display:inline-flex}.hub-continue{min-width:0}.hub-continue__a{white-space:normal;min-width:0;max-width:100%}.hub-continue .hub-continue__a{max-width:160px}.hub-continue__a [data-continue-label]{text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;overflow:hidden}.hub-workspace-strip{background:var(--surface-1);border-bottom:1px solid var(--line)}.hub-workspace-strip>div{max-width:var(--container);padding:0 var(--gutter);align-items:center;gap:32px;margin:auto;display:flex}.hub-workspace-strip>div>span{color:var(--ink-3);margin-right:auto;font-size:12px}.hub-workspace-strip a{min-height:52px;color:var(--ink-2);border-bottom:2px solid #0000;align-items:center;font-size:14px;text-decoration:none;display:inline-flex}.hub-workspace-strip a[aria-current=page]{border-color:var(--ink);color:var(--ink);font-weight:600}.hub-footer{background:var(--surface-1);margin-top:16px;padding-top:56px;padding-bottom:32px}.hub-footer__in{gap:40px 64px}.hub-footer__brand p{max-width:30ch}.hub-footer__head{margin-bottom:12px}.hub-footer__cols a{align-items:center;min-height:36px;display:inline-flex}.hub-footer__future{color:var(--ink-3);margin-top:24px}.hub-footer__small{padding-top:24px}@media (min-width:961px) and (max-width:1100px){.hub-header__in{gap:12px}.hub-header__in>.hub-nav{margin:0 auto}.hub-continue{display:none}.hub-nav>ul>li>a,.hub-menu__sum{padding-left:8px;padding-right:8px;font-size:13px}.hub-brand svg{max-width:162px}.hub-resources__panel{right:var(--gutter)}}@media (max-width:960px){.hub-header{position:static}.hub-header__in{gap:0 var(--space-3);min-height:0;padding-top:var(--space-3);grid-template-columns:minmax(0,1fr) auto;display:grid}.hub-header__in>.hub-nav{margin:var(--space-3) calc(var(--gutter) * -1) 0;padding:0 calc(var(--gutter) - var(--space-3));border-top:1px solid var(--line);grid-area:2/1/auto/-1}.hub-nav>ul{justify-content:space-between;gap:0}.hub-nav>ul>li>a,.hub-menu__sum{min-height:48px;padding-left:10px;padding-right:10px}.hub-nav__lab{padding-inline:var(--space-3);min-height:var(--tap);gap:var(--space-3);grid-area:1/2;font-size:12px}.hub-brand svg{max-width:142px;height:auto!important}.hub-subjects__panel,.hub-resources__panel{width:auto;max-height:min(65vh,430px);top:100%;left:8px;right:8px}.hub-continue .hub-continue__a{max-width:100%}.hub-workspace-strip>div{gap:24px}.hub-workspace-strip>div>span{display:none}.hub-workspace-strip a{min-height:48px;font-size:13px}.hub-footer{padding-top:40px}.hub-footer__in{gap:32px}.hub-footer__cols a{min-height:44px}}@media (max-width:380px){.hub-nav>ul>li>a,.hub-menu__sum{padding-left:7px;padding-right:7px;font-size:12px}.hub-nav__lab{padding-left:10px;padding-right:10px;font-size:11px}.hub-brand svg{max-width:130px}}@media print{.hub-header,.hub-workspace-strip,.hub-footer{display:none}}:root{--sw-bar-h:64px;--sw-tab-h:56px;--sw-action:var(--workspace-action,var(--cobalt-600));--sw-action-ink:var(--workspace-action-ink,var(--grey-0))}@media (max-width:1023.98px){:root{--sw-bar-h:56px}}.sw-bar{z-index:60;border-bottom:1px solid var(--line);background:var(--canvas);position:-webkit-sticky;position:sticky;top:0}.sw-bar__in{align-items:center;gap:var(--space-4);height:var(--sw-bar-h);padding:0 var(--gutter);display:flex}.sw-bar__logo{min-height:var(--tap);border-radius:var(--radius-xs);flex:none;align-items:center;display:inline-flex}.sw-bar__logo svg{display:block}.sw-nav{margin-left:var(--space-5);align-self:stretch}.sw-nav>ul{gap:var(--space-2);height:100%;margin:0;padding:0;list-style:none;display:flex}.sw-nav>ul>li{display:flex}.sw-nav__item{align-items:center;gap:var(--space-2);min-height:var(--sw-bar-h);padding:0 var(--space-3);color:var(--ink-2);font:600 var(--text-sm) / 1 var(--font-body);transition:color var(--dur-fast) var(--ease);text-decoration:none;display:inline-flex;position:relative}.sw-nav__item:hover,.sw-nav__item[aria-current=page]{color:var(--ink)}.sw-nav__item:after{content:"";left:var(--space-3);right:var(--space-3);background:0 0;height:2px;position:absolute;bottom:-1px}.sw-bar__end{align-items:center;gap:var(--space-2);margin-left:auto;display:flex}.sw-bar__btn{align-items:center;gap:var(--space-2);min-height:40px;padding:0 var(--space-3);border-radius:var(--radius-1);color:var(--ink-2);font:600 var(--text-sm) / 1 var(--font-body);cursor:pointer;text-decoration:none;list-style:none;display:inline-flex}.sw-bar__btn::-webkit-details-marker{display:none}.sw-bar__btn:hover,details[open]>.sw-bar__btn{background:var(--surface-2);color:var(--ink)}.sw-board{position:relative}.sw-chip{align-items:center;gap:var(--space-1);min-height:40px;padding:0 var(--space-3);border:1px solid var(--line);border-radius:var(--radius-1);background:var(--canvas);color:var(--ink);font:600 var(--text-sm) / 1 var(--font-body);white-space:nowrap;cursor:pointer;list-style:none;display:inline-flex}.sw-chip::-webkit-details-marker{display:none}.sw-chip:hover,.sw-board[open]>.sw-chip{border-color:var(--line-strong)}.sw-chip__k{color:var(--ink-3);font-weight:400}.sw-chip .hub-menu__chev{margin-left:var(--space-1);fill:none;stroke:currentColor;stroke-width:1.5px;transition:transform var(--dur-fast) var(--ease)}.sw-board[open] .hub-menu__chev{transform:rotate(180deg)}.sw-board__panel{top:calc(100% + var(--space-2));z-index:70;box-sizing:border-box;width:min(360px, calc(100vw - var(--gutter) * 2));padding:var(--space-4);border:1px solid var(--line-strong);border-radius:var(--radius-1);background:var(--canvas);box-shadow:var(--elev-2);position:absolute;right:0}.sw-board__panel ul{margin:0 0 var(--space-4);padding:0;list-style:none}.sw-board__a{justify-content:space-between;align-items:baseline;gap:0 var(--space-3);min-height:var(--tap);padding:var(--space-2) var(--space-2);border-bottom:1px solid var(--line-subtle);color:var(--ink);box-sizing:border-box;flex-wrap:wrap;text-decoration:none;display:flex}.sw-board__a:hover{background:var(--surface-1)}.sw-board__a[data-board-on],.sw-board__a[aria-current=page]{box-shadow:inset 2px 0 0 var(--sw-action)}.sw-board__name{font:600 var(--text-sm) / 1.3 var(--font-body)}.sw-board__n{color:var(--ink-3);font:400 var(--text-xs) / 1.3 var(--font-data)}.sw-board__note{color:var(--ink-3);font-size:var(--text-xs);margin:0;line-height:1.45}.sw-menu__head{margin:0 0 var(--space-2);color:var(--ink-3);font:400 var(--text-xs) / 1.3 var(--font-data);letter-spacing:.06em;text-transform:uppercase}.sw-menu__group ul{margin:0;padding:0;list-style:none}.sw-menu__a{min-height:36px;color:var(--ink-2);font-size:var(--text-sm);align-items:center;text-decoration:none;display:flex}.sw-menu__a:hover,.sw-menu__a[aria-current=page]{color:var(--ink);text-underline-offset:.2em;text-decoration:underline}.sw-menu__a[aria-current=page]{font-weight:600}.hub-site-menu>.sw-menu__panel{top:calc(var(--sw-bar-h) + var(--space-2));right:var(--gutter);z-index:70;box-sizing:border-box;gap:var(--space-5) var(--space-6);width:min(720px, calc(100vw - var(--gutter) * 2));max-height:calc(100vh - var(--sw-bar-h) - var(--space-6));padding:var(--space-5);border:1px solid var(--line-strong);border-radius:var(--radius-1);background:var(--canvas);box-shadow:var(--elev-2);grid-template-columns:repeat(3,minmax(0,1fr));display:grid;position:fixed;overflow:auto}.sw-bar>.hub-continue:not([hidden]){box-sizing:border-box;width:100%;min-width:0;max-width:none;padding:0 var(--gutter);border-top:1px solid var(--line-subtle);background:var(--surface-1);font-size:var(--text-sm);align-items:center;margin:0;display:flex}.sw-bar>.hub-continue .hub-continue__a{align-items:center;gap:var(--space-1);min-width:0;max-width:100%;min-height:var(--tap);color:var(--ink);font-weight:600;display:inline-flex}.sw-bar>.hub-continue [data-continue-label]{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.sw-tabbar{display:none}@media (max-width:1023.98px){.sw-nav,.hub-site-menu{display:none}.sw-bar__in{gap:var(--space-2)}.sw-bar__account>span{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.sw-bar__account{min-width:var(--tap);min-height:var(--tap);justify-content:center;padding:0}.sw-chip{min-height:var(--tap)}body{padding-bottom:calc(var(--sw-tab-h) + env(safe-area-inset-bottom,0px))}.sw-tabbar{z-index:60;padding-bottom:env(safe-area-inset-bottom,0px);border-top:1px solid var(--line);background:var(--canvas);display:block;position:fixed;top:auto;bottom:0;left:0;right:0}.sw-tabbar>ul{grid-template-columns:repeat(5,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}.sw-tabbar__tab{justify-content:center;align-items:center;gap:var(--space-1);height:var(--sw-tab-h);color:var(--ink-2);font:600 var(--text-xs) / 1 var(--font-body);cursor:pointer;flex-direction:column;text-decoration:none;list-style:none;display:flex;position:relative}.sw-tabbar__tab::-webkit-details-marker{display:none}.sw-tabbar__tab[aria-current=page],details[open]>.sw-tabbar__tab{color:var(--ink)}.sw-tabbar__tab[aria-current=page]:before,details[open]>.sw-tabbar__tab:before{content:"";background:var(--ink);height:2px;position:absolute;top:-1px;left:25%;right:25%}.sw-menu__panel--sheet{left:0;right:0;bottom:calc(var(--sw-tab-h) + env(safe-area-inset-bottom,0px));z-index:59;box-sizing:border-box;gap:var(--space-5) var(--space-4);max-height:calc(100dvh - var(--sw-bar-h) - var(--sw-tab-h) - var(--space-4));padding:var(--space-5) var(--gutter);border-top:1px solid var(--line-strong);background:var(--canvas);box-shadow:var(--elev-2);grid-template-columns:repeat(2,minmax(0,1fr));display:grid;position:fixed;overflow:auto}.sw-menu__panel--sheet .sw-menu__a{min-height:var(--tap)}}@media (max-width:359.98px){.sw-chip__k{display:none}.sw-menu__panel--sheet{grid-template-columns:minmax(0,1fr)}}.hub-footer__head{color:var(--ink-3);font:400 var(--text-xs) / 1.3 var(--font-data);text-transform:uppercase;letter-spacing:.06em}.sw-foot__start{margin-top:var(--space-5)}@media (min-width:1024px){.hub-footer__cols{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (max-width:1023.98px){.hub-footer__cols{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}}@media print{.sw-bar,.sw-tabbar{display:none}}.sw-bar{border-bottom-color:var(--line-subtle)}.sw-nav>ul{gap:var(--space-1)}.sw-nav__item{padding:0 var(--space-4);color:var(--ink-3);font-size:var(--text-sm);transition:color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease)}.sw-nav__item svg{width:calc(var(--icon) - var(--space-0));height:calc(var(--icon) - var(--space-0))}.sw-nav__item:hover{color:var(--ink);background:0 0}.sw-nav__item[aria-current=page]{color:var(--accent-text);background:0 0}.sw-nav__item:after{left:var(--space-4);right:var(--space-4);border-radius:var(--radius-pill) var(--radius-pill) 0 0;height:3px}.sw-nav__item[aria-current=page]:after{background:var(--accent)}.sw-chip,.sw-bar__btn{border-radius:var(--radius-pill)}.sw-chip{color:var(--ink-2);background:0 0;border-color:#0000}.sw-chip:hover,.sw-board[open]>.sw-chip{border-color:var(--line-strong);background:var(--canvas)}@media (max-width:1023.98px){.sw-tabbar{border-top-color:var(--line-subtle)}.sw-tabbar__tab[aria-current=page],details[open]>.sw-tabbar__tab{color:var(--accent-text)}.sw-tabbar__tab[aria-current=page]:before,details[open]>.sw-tabbar__tab:before{border-radius:0 0 var(--radius-pill) var(--radius-pill);background:var(--accent);height:3px;left:34%;right:34%}}.plc,.plc-trust,.plc-band{--plc-action:var(--cobalt-600);--plc-action-text:var(--cobalt-600);--plc-action-hover:color-mix(in srgb, var(--cobalt-600) 84%, var(--navy));--plc-action-ink:var(--grey-0);--plc-border:color-mix(in srgb, var(--ink) 18%, transparent)}:root[data-theme=dark] :-webkit-any(.plc,.plc-trust,.plc-band){--plc-action:var(--cobalt-300);--plc-action-text:var(--cobalt-300);--plc-action-hover:color-mix(in srgb, var(--cobalt-300) 82%, white);--plc-action-ink:var(--navy);--plc-border:color-mix(in srgb, var(--ink) 20%, transparent)}:root[data-theme=dark] :-moz-any(.plc,.plc-trust,.plc-band){--plc-action:var(--cobalt-300);--plc-action-text:var(--cobalt-300);--plc-action-hover:color-mix(in srgb, var(--cobalt-300) 82%, white);--plc-action-ink:var(--navy);--plc-border:color-mix(in srgb, var(--ink) 20%, transparent)}:root[data-theme=dark] :is(.plc,.plc-trust,.plc-band){--plc-action:var(--cobalt-300);--plc-action-text:var(--cobalt-300);--plc-action-hover:color-mix(in srgb, var(--cobalt-300) 82%, white);--plc-action-ink:var(--navy);--plc-border:color-mix(in srgb, var(--ink) 20%, transparent)}[data-theme=dark] :-webkit-any(.plc,.plc-trust,.plc-band){--plc-action:var(--cobalt-300);--plc-action-text:var(--cobalt-300);--plc-action-hover:color-mix(in srgb, var(--cobalt-300) 82%, white);--plc-action-ink:var(--navy);--plc-border:color-mix(in srgb, var(--ink) 20%, transparent)}[data-theme=dark] :-moz-any(.plc,.plc-trust,.plc-band){--plc-action:var(--cobalt-300);--plc-action-text:var(--cobalt-300);--plc-action-hover:color-mix(in srgb, var(--cobalt-300) 82%, white);--plc-action-ink:var(--navy);--plc-border:color-mix(in srgb, var(--ink) 20%, transparent)}[data-theme=dark] :is(.plc,.plc-trust,.plc-band){--plc-action:var(--cobalt-300);--plc-action-text:var(--cobalt-300);--plc-action-hover:color-mix(in srgb, var(--cobalt-300) 82%, white);--plc-action-ink:var(--navy);--plc-border:color-mix(in srgb, var(--ink) 20%, transparent)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) :-webkit-any(.plc,.plc-trust,.plc-band){--plc-action:var(--cobalt-300);--plc-action-text:var(--cobalt-300);--plc-action-hover:color-mix(in srgb, var(--cobalt-300) 82%, white);--plc-action-ink:var(--navy);--plc-border:color-mix(in srgb, var(--ink) 20%, transparent)}:root:not([data-theme=light]) :-moz-any(.plc,.plc-trust,.plc-band){--plc-action:var(--cobalt-300);--plc-action-text:var(--cobalt-300);--plc-action-hover:color-mix(in srgb, var(--cobalt-300) 82%, white);--plc-action-ink:var(--navy);--plc-border:color-mix(in srgb, var(--ink) 20%, transparent)}:root:not([data-theme=light]) :is(.plc,.plc-trust,.plc-band){--plc-action:var(--cobalt-300);--plc-action-text:var(--cobalt-300);--plc-action-hover:color-mix(in srgb, var(--cobalt-300) 82%, white);--plc-action-ink:var(--navy);--plc-border:color-mix(in srgb, var(--ink) 20%, transparent)}}.plc-sr{clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.plc-glyph{width:var(--space-5);height:var(--space-5);fill:none;stroke:currentColor;stroke-width:1.5px;stroke-linecap:round;stroke-linejoin:round;flex:none}.plc{gap:var(--space-5);padding:var(--space-3) 0 0;grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch;margin:0;list-style:none;display:grid}.plc__card{gap:var(--space-4);min-width:0;padding:var(--space-5) var(--space-5) var(--space-5);border:1px solid var(--plc-border);border-radius:var(--radius-2);background:var(--surface-1);color:var(--ink);flex-direction:column;display:flex;position:relative}.plc__card--lead{--accent:var(--plc-action);--accent-hover:var(--plc-action-hover);--accent-pressed:var(--plc-action-hover);--accent-ink:var(--plc-action-ink);border:2px solid color-mix(in srgb, var(--plc-action) 62%, transparent);background:color-mix(in srgb, var(--plc-action) 4%, var(--surface-1))}.plc__no{color:var(--ink-3);font:var(--weight-regular) var(--text-xs) / var(--leading-ui) var(--font-data);font-variant-numeric:tabular-nums;margin:0}.plc__pill{padding:var(--space-1) var(--space-3);border:1px solid color-mix(in srgb, var(--plc-action) 40%, transparent);border-radius:var(--radius-pill);background:color-mix(in srgb, var(--plc-action) 10%, var(--surface-1));color:var(--plc-action-text);font:var(--weight-semibold) var(--text-xs) / var(--leading-ui) var(--font-body);white-space:nowrap;margin:0;position:absolute;top:0;left:50%;transform:translate(-50%,-50%)}.plc__name{margin:calc(-1 * var(--space-2)) 0 0;color:var(--ink);font:var(--weight-semibold) var(--text-xl) / var(--leading-head) var(--font-display);letter-spacing:var(--tracking-display)}.plc__price{padding-bottom:var(--space-4);border-bottom:1px solid var(--line);margin:0}.plc__amount{color:var(--ink);font:var(--weight-semibold) var(--text-display) / var(--leading-tight) var(--font-display);letter-spacing:-.03em;font-variant-numeric:lining-nums;display:block}.plc__per{margin-top:var(--space-1);color:var(--ink-2);font:var(--weight-regular) var(--text-sm) / var(--leading-ui) var(--font-body);display:block}.plc-when{display:none}.plc-when[data-opt="0"]{display:block}.plc__card--lead:has(input[data-opt="1"]:checked) .plc-when[data-opt="0"]{display:none}.plc__card--lead:has(input[data-opt="2"]:checked) .plc-when[data-opt="0"]{display:none}.plc__card--lead:has(input[data-opt="1"]:checked) .plc-when[data-opt="1"]{display:block}.plc__card--lead:has(input[data-opt="2"]:checked) .plc-when[data-opt="2"]{display:block}.plc__parent{align-items:center;gap:0 var(--space-2);color:var(--ink-2);font:var(--weight-regular) var(--text-sm) / var(--leading-body) var(--font-body);flex-wrap:wrap;margin:0;display:flex}.plc__parent a{color:var(--plc-action-text);font-weight:var(--weight-semibold)}.plc__parent .sh-btn{min-height:var(--space-6);color:var(--plc-action-text)}.plc-years{gap:var(--space-1);padding:var(--space-1);border:1px solid var(--line);border-radius:var(--radius-1);background:var(--surface-2);grid-auto-columns:minmax(0,1fr);grid-auto-flow:column;margin:0;display:grid}.plc-years__opt{min-height:var(--tap);border-radius:var(--radius-0);color:var(--ink-2);font:var(--weight-semibold) var(--text-sm) / var(--leading-ui) var(--font-body);cursor:pointer;transition:background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);border:1px solid #0000;justify-content:center;align-items:center;display:flex;position:relative}.plc-years__opt input{opacity:0;cursor:pointer;width:100%;height:100%;margin:0;position:absolute;top:0;bottom:0;left:0;right:0}.plc-years__opt:hover{color:var(--ink)}.plc-years__opt:has(input:checked){border-color:color-mix(in srgb, var(--plc-action) 45%, transparent);background:var(--surface-1);color:var(--plc-action-text)}.plc-years__opt:has(input:focus-visible){outline:var(--focus-ring-width) solid var(--focus-ring-color);outline-offset:var(--focus-ring-offset)}.plc__points{gap:var(--space-3);margin:0;padding:0;list-style:none;display:grid}.plc__points li{align-items:flex-start;gap:var(--space-3);color:var(--ink);font:var(--weight-regular) var(--text-md) / var(--leading-snug) var(--font-body);display:flex}.plc-tick{width:var(--space-5);height:var(--space-5);margin-top:calc(-1 * var(--space-0));fill:none;stroke:var(--ink);stroke-width:1.5px;stroke-linecap:round;stroke-linejoin:round;flex:none}.plc-tick .plc-glyph__disc{fill:color-mix(in srgb, var(--ink) 5%, transparent);stroke:color-mix(in srgb, var(--ink) 24%, transparent);stroke-width:1px}.plc__card--lead .plc-tick{stroke:var(--plc-action-text)}.plc__card--lead .plc-tick .plc-glyph__disc{fill:color-mix(in srgb, var(--plc-action) 10%, transparent);stroke:color-mix(in srgb, var(--plc-action) 40%, transparent)}.plc__foot{gap:var(--space-3);padding-top:var(--space-2);margin-top:auto;display:grid}.plc__foot>.sh-btn,.plc__foot>.hub-btn{width:100%}.plc__foot>.hub-btn--quiet{border-color:color-mix(in srgb, var(--ink) 40%, transparent)}.plc__small{color:var(--ink-3);font:var(--weight-regular) var(--text-sm) / var(--leading-body) var(--font-body);margin:0}.plc-arrow{width:var(--icon-sm);height:var(--icon-sm)}.plc-note{align-items:flex-start;gap:var(--space-3);padding:var(--space-3) var(--space-4);border:1px solid color-mix(in srgb, var(--plc-action) 20%, transparent);border-radius:var(--radius-1);background:color-mix(in srgb, var(--plc-action) 8%, var(--surface-1));color:var(--ink-2);display:flex}.plc-note .plc-glyph{color:var(--plc-action-text)}.plc-note p{font:var(--weight-regular) var(--text-sm) / var(--leading-snug) var(--font-body);margin:0}.plc-note strong{color:var(--plc-action-text);font-weight:var(--weight-semibold);display:block}.plc-trust{gap:var(--space-4);grid-template-columns:repeat(4,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}.plc-trust li{align-items:flex-start;gap:var(--space-3);min-width:0;padding:var(--space-4);border:1px solid var(--plc-border);border-radius:var(--radius-1);background:var(--surface-1);display:flex}.plc-trust .plc-glyph{width:var(--space-6);height:var(--space-6);color:var(--ink);stroke-width:1.25px}.plc-trust p{color:var(--ink-2);font:var(--weight-regular) var(--text-sm) / var(--leading-snug) var(--font-body);margin:0}.plc-trust strong{margin-bottom:var(--space-1);color:var(--ink);font-weight:var(--weight-semibold);display:block}.plc-band{gap:var(--space-6);padding-top:var(--space-7);border-top:1px solid var(--line);grid-template-columns:minmax(0,1fr) minmax(0,26rem);align-items:end;display:grid}.plc-band__copy{gap:var(--space-3);max-width:34rem;padding-bottom:var(--space-4);justify-items:start;display:grid}.plc-band__title{color:var(--ink);font:var(--weight-semibold) var(--text-h2) / var(--leading-head) var(--font-display);letter-spacing:var(--tracking-display);text-wrap:balance;margin:0}.plc-band__copy p{color:var(--ink-2);font:var(--weight-regular) var(--text-md) / var(--leading-body) var(--font-body);margin:0}.plc-band__act{--accent:var(--plc-action);--accent-hover:var(--plc-action-hover);--accent-pressed:var(--plc-action-hover);--accent-ink:var(--plc-action-ink);padding-top:var(--space-2)}.plc-band__art{width:100%;height:auto;display:block}.plc-band__ink{fill:none;stroke:var(--ink);stroke-width:1.5px;stroke-linecap:round;stroke-linejoin:round}.plc-band__fill{fill:color-mix(in srgb, var(--ink) 8%, transparent);stroke:none}@media (max-width:1080px){.plc-trust{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:960px){.plc{gap:var(--space-6);grid-template-columns:minmax(0,1fr)}.plc-band{gap:var(--space-5);grid-template-columns:minmax(0,1fr)}.plc-band__art{max-width:22rem}}@media (max-width:560px){.plc__card{padding:var(--space-5) var(--space-4) var(--space-4)}.plc-trust{gap:var(--space-3);grid-template-columns:minmax(0,1fr)}}@media (prefers-reduced-motion:reduce){.plc-years__opt{transition:none}}@media (forced-colors:active){.plc-years__opt:has(input:checked){border-color:highlight;outline:2px solid highlight}.plc-tick,.plc-band__ink{stroke:canvastext}}.product-pricing{max-width:1080px;margin-left:auto;margin-right:auto;padding-top:max(24px,min(4vw,56px))}.product-pricing__head{max-width:46rem;padding-bottom:max(28px,min(4vw,48px))}.product-pricing__top .hub-plate{margin:0 0 var(--space-7)}@media (min-width:1000px){.product-pricing__top[data-picture]{gap:var(--space-8);grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);align-items:center;padding-bottom:max(28px,min(4vw,48px));display:grid}.product-pricing__top[data-picture] .product-pricing__head{padding-bottom:0}.product-pricing__top .hub-plate{margin:0}.product-pricing__top .hub-plate--scene img{aspect-ratio:4/3}}.product-pricing__eyebrow{margin:0 0 var(--space-4);color:var(--ink-2);font:var(--weight-semibold) var(--text-sm) / var(--leading-ui) var(--font-body)}.product-pricing__head .hub-h1{letter-spacing:-.025em;text-wrap:balance;max-width:18ch;margin:0 0 22px;font-size:max(36px,min(4.6vw,56px));line-height:1.06}.product-pricing__head .hub-lede{max-width:46ch;margin:0 0 20px}.product-pricing__notice{font-size:var(--text-sm);color:var(--ink-2);margin:0}.product-pricing__notice strong{color:var(--ink);font-weight:600}.product-pricing .plc-trust{margin-top:var(--space-5)}.product-pricing .plc-band{margin-top:var(--space-8)}.product-pricing__scope{max-width:65ch;color:var(--ink-2);font-size:var(--text-sm);margin:32px 0 0}.product-pricing__scope a{white-space:nowrap;font-weight:600}.product-pricing__details{border-top:1px solid var(--line);margin-top:48px}.product-pricing__disclosure{border-bottom:1px solid var(--line)}.product-pricing__disclosure>summary{cursor:pointer;font-weight:600;font-size:var(--text-md);padding:20px 28px 20px 0;list-style:none;position:relative}.product-pricing__disclosure>summary::-webkit-details-marker{display:none}.product-pricing__disclosure>summary:after{content:"+";font-size:22px;font-weight:400;position:absolute;top:18px;right:2px}.product-pricing__disclosure[open]>summary:after{content:"−"}.product-pricing__disclosure>summary:focus-visible{outline:2px solid var(--ink);outline-offset:3px}.product-pricing__comparison{grid-template-columns:1fr 1fr;gap:48px;padding:12px 0 32px;display:grid}.product-pricing__comparison h2{font:600 20px / 1.3 var(--font-body);margin:0 0 20px}.product-pricing__features{margin:0;padding:0;list-style:none}.product-pricing__features li{margin:0 0 20px}.product-pricing__features h3,.product-pricing__building>h3{font:600 var(--text-sm) / 1.45 var(--font-body);margin:0 0 4px}.product-pricing__features p,.product-pricing__building>p{font-size:var(--text-sm);color:var(--ink-2);margin:0}.product-pricing__building{border-top:1px solid var(--line);padding-top:20px}.product-pricing__building>p{margin-bottom:16px}.product-pricing__answer{max-width:74ch;padding:0 0 24px}.product-pricing__answer p{margin:0 0 16px}.product-pricing__answer p:last-child{margin-bottom:0}.product-pricing__review{color:var(--ink-3);font-size:var(--text-sm);max-width:88ch;margin:28px 0 16px}@media (max-width:760px){.product-pricing__head .hub-h1{max-width:18ch}.product-pricing__comparison{grid-template-columns:minmax(0,1fr);gap:24px}.product-pricing__comparison>section+section{border-top:1px solid var(--line);padding-top:24px}.product-pricing__details{margin-top:36px}}@media print{.product-pricing__disclosure>:not(summary){display:block!important}}.product-pricing__cta{gap:var(--space-3);margin:var(--space-4) 0;flex-wrap:wrap;display:flex}.product-pricing .sp-payline{margin-bottom:var(--space-3)}:root{--sw-serif:"Newsreader", "Iowan Old Style", Georgia, serif;--sw-h1:clamp(2.25rem, 1.5rem + 3vw, 3.75rem);--sw-h2:clamp(1.625rem, 1.2rem + 1.6vw, 2.375rem);--sw-grid:color-mix(in srgb, var(--ink) 5%, transparent);--sw-grid-major:color-mix(in srgb, var(--ink) 9%, transparent)}html body{background:var(--page);overflow-x:clip}html body .hub-crumbs ol{padding-top:var(--space-4);font:400 var(--text-xs) / 1.4 var(--font-data);letter-spacing:.06em;text-transform:uppercase}html body .hub-crumbs a{color:var(--ink-2)}html body .hub-h1,html body .sw-h1,html body .ph h1,html body .ap-head h1,html body .sh-subject-home .hub-h1{margin:0 0 var(--space-5);color:var(--ink);font-family:var(--sw-serif);font-size:var(--sw-h1);letter-spacing:-.02em;text-wrap:balance;font-weight:600;line-height:1.04}html body .sw-h2,html body .hub-h2,html body .ph h2,html body .sh-subject-home h2{color:var(--ink);font-family:var(--sw-serif);font-size:var(--sw-h2);letter-spacing:-.015em;text-wrap:balance;font-weight:600;line-height:1.1}html body .ph h3,html body .hub-h3{font:600 var(--text-lg) / 1.3 var(--font-body);letter-spacing:-.01em}html body .hub-lede,html body .sw-lede,html body .ap-lede{max-width:58ch;color:var(--ink-2);font-size:var(--text-lg);line-height:1.55}html body .sw-mark,html body .ph .ph-eyebrow,html body .hub-overline,html body .product-pricing__eyebrow{margin:0 0 var(--space-4);color:var(--ink-3);font:400 var(--text-xs) / 1.4 var(--font-data);letter-spacing:.08em;text-transform:uppercase}html body .sw-mark__n{color:var(--ink)}html body .sw-small,html body .ph .ph-note{color:var(--ink-3);font-size:var(--text-sm);line-height:1.55}html body .hub-btn,html body .ph-open-workspace,html body .ph-secondary{box-sizing:border-box;justify-content:center;align-items:center;gap:var(--space-2);min-height:var(--tap);padding:0 var(--space-5);border-radius:var(--radius-1);font:600 var(--text-md) / 1.2 var(--font-body);transition:background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);border:1px solid #0000;text-decoration:none;display:inline-flex}html body .ap .ap-actions .ph-open-workspace{border-radius:var(--radius-1)}html body .hub-btn--primary,html body .ph-open-workspace{border-color:var(--sw-action);background:var(--sw-action);color:var(--sw-action-ink)}html body .hub-btn--primary:hover,html body .ph-open-workspace:hover{border-color:color-mix(in srgb, var(--sw-action) 84%, black);background:color-mix(in srgb, var(--sw-action) 84%, black)}html body .hub-btn--quiet{border-color:var(--line-strong);background:var(--canvas);color:var(--ink)}html body .hub-btn--quiet:hover{border-color:var(--ink-3);background:var(--canvas)}html body .ph-secondary{color:var(--ink);text-decoration:underline;-webkit-text-decoration-color:var(--line-strong);text-decoration-color:var(--line-strong);text-underline-offset:.25em;background:0 0;border:0;padding:0}html body .ph-secondary:hover{background:0 0;text-decoration-color:currentColor}html body .sw-link{color:var(--ink);text-decoration:underline;-webkit-text-decoration-color:var(--line-strong);text-decoration-color:var(--line-strong);text-underline-offset:.25em;font-weight:600}html body .sw-link:hover{text-decoration-color:currentColor}html body .sw-actions,html body .ap-actions{align-items:center;gap:var(--space-3) var(--space-5);margin:var(--space-6) 0 var(--space-3);flex-wrap:wrap;display:flex}html body .sw-head,html body .ap-head,html body .hub-pagehead,html body .sh-subject-opening{isolation:isolate;padding-block:var(--space-7) var(--space-8);position:relative}html body .sw-head:before,html body .ap-head:before,html body .hub-pagehead:before,html body .sh-subject-opening:before{content:"";inset:calc(var(--space-8) * -1) calc(50% - 50vw) 0;z-index:-1;border-bottom:1px solid var(--line);background-image:linear-gradient(to right, var(--sw-grid-major) 1px, transparent 1px), linear-gradient(to bottom, var(--sw-grid-major) 1px, transparent 1px), linear-gradient(to right, var(--sw-grid) 1px, transparent 1px), linear-gradient(to bottom, var(--sw-grid) 1px, transparent 1px);background-size:calc(var(--space-5) * 5) calc(var(--space-5) * 5), calc(var(--space-5) * 5) calc(var(--space-5) * 5), var(--space-5) var(--space-5), var(--space-5) var(--space-5);pointer-events:none;background-position:top;position:absolute;-webkit-mask-image:linear-gradient(#000 0%,#000 60%,#0000 100%);mask-image:linear-gradient(#000 0%,#000 60%,#0000 100%)}@media (max-width:599.98px){html body .sw-head,html body .ap-head,html body .hub-pagehead,html body .sh-subject-opening,html body .hx-hero{padding-block:var(--space-5) var(--space-7)}}html body .ap-head{max-width:none}html body .ap-head__copy{max-width:50rem}html body .ap-head--visual{gap:var(--space-7);grid-template-columns:minmax(0,1fr);display:grid}@media (min-width:1000px){html body .ap-head--visual{align-items:center;gap:var(--space-8);grid-template-columns:minmax(0,1.1fr) minmax(0,1fr)}}html body .sw-page{max-width:var(--container);margin-left:auto;margin-right:auto}html body .sw-section,html body .ap-section,html body .ap-split,html body .ap-end{margin-top:var(--space-8)}html body .sw-section>.sw-h2{margin:0 0 var(--space-6);max-width:24ch}html body .sw-close,html body .ap-end{margin-top:var(--space-9);padding-top:var(--space-7);border-top:1px solid var(--line)}html body .sw-close>.sw-h2{margin:0}html body .ap-steps>li{padding-top:var(--space-4);border-top:1px solid var(--ink)}html body .ap-steps__k{color:var(--ink-3);font:400 var(--text-xs) / 1.3 var(--font-data);letter-spacing:.08em}html body .ap-cards{gap:0 var(--space-7)}html body .ap-cards>li{padding:var(--space-5) 0;border:0;border-top:1px solid var(--line);background:0 0;border-radius:0}html body .ap-notice{margin-top:var(--space-8);padding:var(--space-5) var(--space-6);border:1px solid var(--line-strong);background:var(--canvas);border-radius:0}html body .ap-notice h2{margin:0 0 var(--space-3);font:400 var(--text-xs) / 1.4 var(--font-data);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}html body .ap-bench img,html body .ap-visual img,html body .hub-plate img{border:1px solid var(--line-strong);border-radius:var(--radius-xs);box-shadow:none}html body .ap-bench figcaption{font-size:var(--text-sm)}html body .sw-boards{margin:var(--space-5) 0 0;border-block:1px solid var(--line);grid-template-columns:repeat(auto-fit,minmax(min(100%,12rem),1fr));padding:0;list-style:none;display:grid}html body .sw-boards>li{gap:var(--space-1);padding:var(--space-4) var(--space-4) var(--space-4) 0;flex-direction:column;display:flex}html body .sw-boards>li+li{padding-left:var(--space-4);border-left:1px solid var(--line)}html body .sw-boards__name{color:var(--ink-3);font:400 var(--text-xs) / 1.3 var(--font-data);letter-spacing:.08em;text-transform:uppercase}html body .sw-boards__n{color:var(--ink);font:400 var(--text-2xl) / 1 var(--font-data)}html body .sw-boards__unit{color:var(--ink-2);font-size:var(--text-sm)}@media (max-width:599.98px){html body .sw-boards>li+li{border-left:0;border-top:1px solid var(--line);padding-left:0}}html body .sw-head--split{gap:var(--space-7);grid-template-columns:minmax(0,1fr);display:grid}@media (min-width:1000px){html body .sw-head--split{align-items:start;gap:var(--space-8);grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr)}}html body .product-pricing__notice{max-width:58ch;margin:var(--space-5) 0 0;color:var(--ink-2);font-size:var(--text-sm)}html body .sw-receipt{box-sizing:border-box;padding:var(--space-5);border:1px solid var(--line-strong);border-radius:var(--radius-1);background:var(--canvas)}html body .sw-receipt__head{margin:0 0 var(--space-4);padding-bottom:var(--space-3);border-bottom:1px solid var(--line);color:var(--ink-2);font:400 var(--text-xs) / 1.4 var(--font-data);letter-spacing:.08em;text-transform:uppercase;justify-content:space-between;display:flex}html body .sw-receipt dl{margin:0}html body .sw-receipt dl>div{justify-content:space-between;align-items:baseline;gap:var(--space-4);padding:var(--space-2) 0;border-bottom:1px dashed var(--line);display:flex}html body .sw-receipt dt{color:var(--ink-3);font:400 var(--text-xs) / 1.4 var(--font-data);letter-spacing:.06em;text-transform:uppercase}html body .sw-receipt dd{color:var(--ink);font:400 var(--text-sm) / 1.4 var(--font-data);text-align:right;margin:0}html body .sw-receipt__big{color:var(--yours);font-size:var(--text-2xl)}html body .sw-receipt__foot{margin:var(--space-4) 0 0;color:var(--ink-3);font-size:var(--text-sm)}html body .sw-prices,html body .sw-includes{border-collapse:collapse;border-top:1px solid var(--ink);width:100%}html body .sw-prices th,html body .sw-prices td,html body .sw-includes th,html body .sw-includes td{padding:var(--space-4) var(--space-3) var(--space-4) 0;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;color:var(--ink-2);font-size:var(--text-sm);line-height:1.45}html body .sw-prices thead th,html body .sw-includes thead th{padding-block:var(--space-3);color:var(--ink-3);font:400 var(--text-xs) / 1.3 var(--font-data);letter-spacing:.08em;text-transform:uppercase}html body .sw-prices tbody th{width:24%}html body .sw-prices tr[data-mark]>*{background:color-mix(in srgb, var(--yours) 5%, transparent)}html body .sw-prices tr[data-mark]>th{box-shadow:inset 2px 0 0 var(--yours);padding-left:var(--space-3)}html body .sw-prices__plan{color:var(--ink);font:600 var(--text-md) / 1.3 var(--font-body);display:block}html body .sw-prices__note{margin-top:var(--space-1);color:var(--ink-3);font:400 var(--text-xs) / 1.4 var(--font-data);letter-spacing:.04em;display:block}html body .sw-prices__amount{color:var(--ink);font:400 var(--text-xl) / 1.1 var(--font-data)}html body .sw-prices tr[data-mark] .sw-prices__amount{color:var(--yours)}html body .sw-prices__per{color:var(--ink-3);font-size:var(--text-sm)}html body .sw-prices__go{text-align:right;white-space:nowrap}@media (max-width:759.98px){html body .sw-prices thead{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}html body .sw-prices,html body .sw-prices tbody,html body .sw-prices tr,html body .sw-prices th,html body .sw-prices td{width:auto;display:block}html body .sw-prices tr{gap:0 var(--space-4);padding:var(--space-4) var(--space-3);border-bottom:1px solid var(--line);grid-template-columns:minmax(0,1fr) auto;display:grid}html body .sw-prices th,html body .sw-prices td{border:0;padding:0}html body .sw-prices tbody th{width:auto}html body .sw-prices tr[data-mark]>*{background:0 0}html body .sw-prices tr[data-mark]{background:color-mix(in srgb, var(--yours) 5%, transparent);box-shadow:inset 2px 0 0 var(--yours)}html body .sw-prices tr[data-mark]>th{box-shadow:none;padding-left:0}html body .sw-prices__price{text-align:right;grid-area:1/2}html body .sw-prices td[data-label]{margin-top:var(--space-2);grid-column:1/-1}html body .sw-prices__go{margin-top:var(--space-3);text-align:left;grid-column:1/-1}}html body .sw-includes th[scope=row]{color:var(--ink);font-weight:400}html body .sw-includes td,html body .sw-includes thead th+th{text-align:center;width:14%}html body .sw-includes__soon{color:var(--ink-3);font:400 var(--text-xs) / 1.3 var(--font-data);letter-spacing:.04em}html body .sw-yes{color:var(--yours)}html body .sw-yes .sh-icon{vertical-align:-3px}html body .sw-no{color:var(--ink-4)}@media (max-width:599.98px){html body .sw-includes thead th+th{letter-spacing:.02em;width:auto}html body .sw-includes td{width:18%}}html body .sw-facts{gap:var(--space-3) var(--space-6);margin:var(--space-6) 0 0;color:var(--ink-3);font-size:var(--text-sm);grid-template-columns:repeat(auto-fit,minmax(min(100%,15rem),1fr));padding:0;line-height:1.5;list-style:none;display:grid}html body .sw-facts strong{color:var(--ink);font-weight:600}html body .product-pricing__disclosure{border-color:var(--line)}html body .sh-subject-opening .hub-pagehead{padding-top:0;padding-bottom:0}html body .sh-subject-opening .hub-pagehead:before{display:none}html body .sh-subject-opening h2,html body .sh-subject-preview h2{font:600 var(--text-lg) / 1.3 var(--font-body);letter-spacing:-.01em}html body .sh-subject-course a,html body .sh-subject-courses a{border-color:var(--line-strong);border-radius:var(--radius-xs);background:var(--canvas)}html body .sh-subject-course,html body .sh-subject-preview,html body .hub-aside__card{border-radius:var(--radius-xs);box-shadow:none}html body .hx-hero{isolation:isolate;padding-block:var(--space-7) var(--space-8);position:relative}html body .hx-hero:before{content:"";inset:calc(var(--space-8) * -1) calc(50% - 50vw) 0;z-index:-1;border-bottom:1px solid var(--line);background-image:linear-gradient(to right, var(--sw-grid-major) 1px, transparent 1px), linear-gradient(to bottom, var(--sw-grid-major) 1px, transparent 1px), linear-gradient(to right, var(--sw-grid) 1px, transparent 1px), linear-gradient(to bottom, var(--sw-grid) 1px, transparent 1px);background-size:calc(var(--space-5) * 5) calc(var(--space-5) * 5), calc(var(--space-5) * 5) calc(var(--space-5) * 5), var(--space-5) var(--space-5), var(--space-5) var(--space-5);pointer-events:none;position:absolute;-webkit-mask-image:linear-gradient(#000 0%,#000 60%,#0000 100%);mask-image:linear-gradient(#000 0%,#000 60%,#0000 100%)}html body .hx-tagline{margin:0 0 var(--space-4);color:var(--ink-3);font:400 var(--text-xs) / 1.4 var(--font-data);letter-spacing:.08em;text-transform:uppercase}html body .hx-h1{font-family:var(--sw-serif);font-size:var(--sw-h1);letter-spacing:-.02em;font-weight:600}html body .hx-worlds{min-width:0;margin:0}html body .hx-worlds__list{gap:var(--space-3);grid-template-columns:repeat(3,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}html body .hx-world__a{color:var(--ink);text-decoration:none;display:block}html body .hx-world__a img{aspect-ratio:3/4;object-fit:cover;border:1px solid var(--line-strong);border-radius:var(--radius-xs);width:100%;height:auto;display:block}html body .hx-world__name{margin-top:var(--space-2);font:400 var(--text-xs) / 1.4 var(--font-data);letter-spacing:.08em;text-transform:uppercase;justify-content:space-between;display:flex}html body .hx-world__a:hover img{border-color:var(--ink-3)}@media (max-width:599.98px){html body .hx-world__a img{aspect-ratio:4/5}}html body .sw-foot{margin-top:var(--space-9);border-top:1px solid var(--line);background:var(--canvas)}html body .sw-foot .hub-footer__cols a{color:var(--ink-2);text-decoration:none}html body .sw-foot .hub-footer__cols a:hover{color:var(--ink);text-decoration:underline}@media (prefers-reduced-motion:reduce){html body .hub-btn,html body .ph-open-workspace,html body .ph-secondary{transition:none}}@media (max-width:599.98px){html body .sw-head:before,html body .ap-head:before,html body .hub-pagehead:before,html body .sh-subject-opening:before,html body .hx-hero:before{opacity:.6;-webkit-mask-image:linear-gradient(to bottom, black 0, transparent calc(var(--space-8) + var(--space-6)));-webkit-mask-image:linear-gradient(to bottom, black 0, transparent calc(var(--space-8) + var(--space-6)));mask-image:linear-gradient(to bottom, black 0, transparent calc(var(--space-8) + var(--space-6)))}}.faq{gap:var(--space-6);min-width:0;display:grid}.faq__jump ul{gap:var(--space-2) var(--space-5);flex-wrap:wrap;margin:0;padding:0;list-style:none;display:flex}.faq__jump a{color:var(--ink-2);font:var(--weight-regular) var(--text-sm) / var(--leading-ui) var(--font-body);text-underline-offset:3px;text-decoration:underline;-webkit-text-decoration-color:color-mix(in srgb, var(--ink) 28%, transparent);text-decoration-color:color-mix(in srgb, var(--ink) 28%, transparent)}.faq__jump a:hover{color:var(--ink)}.faq__group{gap:var(--space-2);min-width:0;scroll-margin-top:var(--space-6);display:grid}.faq__title{color:var(--ink);font:var(--weight-semibold) var(--text-md) / var(--leading-snug) var(--font-body);letter-spacing:0;margin:0}.faq__list{border-top:1px solid var(--line)}.faq__item{border-bottom:1px solid var(--line);scroll-margin-top:var(--space-6)}.faq__q{justify-content:space-between;align-items:center;gap:var(--space-4);min-height:44px;padding:var(--space-3) 0;color:var(--ink);font:var(--weight-semibold) var(--text-md) / var(--leading-snug) var(--font-body);cursor:pointer;list-style:none;display:flex}.faq__q::-webkit-details-marker{display:none}.faq__q:focus-visible{outline:var(--focus-ring-width,2px) solid var(--focus-ring-color,currentColor);outline-offset:var(--focus-ring-offset,2px)}.faq__qtext{overflow-wrap:anywhere;min-width:0}.faq__chev{fill:none;stroke:currentColor;stroke-width:1.5px;stroke-linecap:round;stroke-linejoin:round;color:var(--ink-3);flex:none}.faq__item[open] .faq__chev{transform:rotate(180deg)}@media (prefers-reduced-motion:no-preference){.faq__chev{transition:transform .15s}}.faq__a{gap:var(--space-3);max-width:68ch;padding:0 0 var(--space-5);color:var(--ink-2);font:var(--weight-regular) var(--text-md) / var(--leading-body) var(--font-body);display:grid}.faq__a p{margin:0}.faq__a a{color:var(--ink);text-underline-offset:3px}.faq__perma{font-size:var(--text-xs)}.faq__perma a,.faq__perma button{color:var(--ink-3);font:inherit;text-underline-offset:3px;cursor:pointer;background:0 0;border:0;padding:0;text-decoration:underline}.faq__perma a:hover,.faq__perma button:hover{color:var(--ink)}.faq__inline{color:var(--ink);font:inherit;text-underline-offset:3px;cursor:pointer;background:0 0;border:0;padding:0;text-decoration:underline}.sp-payline{max-width:62ch;color:var(--ink-2);font:var(--weight-regular) var(--text-sm) / var(--leading-body) var(--font-body);margin:0}.sp-payline__free{color:var(--ink);font-weight:var(--weight-semibold)}.sp-steps{gap:var(--space-4);padding:var(--space-5) 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:grid}.sp-steps__title,.sp-tes__title{color:var(--ink);font:var(--weight-semibold) var(--text-md) / var(--leading-snug) var(--font-body);margin:0}.sp-steps__list{gap:var(--space-5);grid-template-columns:repeat(4,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}.sp-steps__item{align-content:start;gap:var(--space-1);min-width:0;display:grid}.sp-steps__no{color:var(--ink-3);font:var(--weight-regular) var(--text-xs) / var(--leading-ui) var(--font-data);font-variant-numeric:tabular-nums}.sp-steps__name{color:var(--ink);font:var(--weight-semibold) var(--text-md) / var(--leading-snug) var(--font-body);margin:0}.sp-steps__body{color:var(--ink-2);font:var(--weight-regular) var(--text-sm) / var(--leading-body) var(--font-body);margin:0}@media (max-width:880px){.sp-steps__list{gap:var(--space-4);grid-template-columns:minmax(0,1fr)}.sp-steps__item{grid-template-columns:var(--space-5) minmax(0, 1fr);column-gap:var(--space-3)}.sp-steps__item>.sp-steps__name,.sp-steps__item>.sp-steps__body{grid-column:2}.sp-steps__no{grid-area:1/1;align-self:baseline}}.sp-tes{gap:var(--space-2);max-width:68ch;padding:var(--space-5) 0;border-top:1px solid var(--line);color:var(--ink-2);font:var(--weight-regular) var(--text-sm) / var(--leading-body) var(--font-body);display:grid}.sp-tes p{margin:0}.sp-tes__link a{color:var(--ink);text-underline-offset:3px}.sp-tesline{color:var(--ink-2);font:var(--weight-regular) var(--text-sm) / var(--leading-body) var(--font-body);margin:0}.sp-tesline a{color:inherit;text-decoration:underline;-webkit-text-decoration-color:var(--line);text-decoration-color:var(--line);text-underline-offset:.2em}.sp-tesline a:hover{color:var(--ink);text-decoration-color:currentColor}.sp-sr{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}:root,[data-theme=light]{--b-cobalt:#1f4fd8;--b-cobalt-deep:#173ea8;--b-cobalt-ink:#1d47c4;--b-cobalt-soft:#e8eefc;--b-teal:#14a3a0;--b-teal-ink:#0b7f7c;--b-teal-soft:#e3f5f4;--b-lime:#7ac943;--b-lime-ink:#3f7d14;--b-lime-soft:#eef8e4;--b-bg:#fff;--b-bg-soft:#f3f6fb;--b-surface:#fff;--b-surface-2:#f7f9fd;--b-ink:#0f1a33;--b-ink-2:#44506a;--b-ink-3:#5d6984;--b-line:#e3e8f2;--b-line-strong:#cfd7e6;--b-on-cobalt:#fff;--b-on-cobalt-2:#ffffffd1;--b-band:linear-gradient(135deg, #2457e6 0%, #1f4fd8 45%, #173ea8 100%);--b-band-card:#ffffff14;--b-band-card-hover:#ffffff24;--b-band-line:#fff3;--b-band-deep:linear-gradient(120deg, #0f1f5c 0%, #15338f 42%, #0f6e86 100%);--b-purple:#7b4fd6;--b-tint-lab:linear-gradient(160deg, #eaf1ff 0%, #d8e5ff 55%, #c7d9ff 100%);--b-tint-practise:linear-gradient(160deg, #f6fbe9 0%, #e7f6cf 55%, #d7efb4 100%);--b-tint-course:linear-gradient(160deg, #eefaf6 0%, #d9f3ea 55%, #c4ecdf 100%);--b-tint-line:#0f1a330f;--b-bio:#2f9e5b;--b-chem:#7b4fd6;--b-phys:#2d7ff0;--b-bio-ink:#237a46;--b-chem-ink:#6a3fc4;--b-phys-ink:#1b64c9;--b-bio-soft:#e6f5ec;--b-chem-soft:#efe9fb;--b-phys-soft:#e6f0fe;--b-radius:20px;--b-radius-md:16px;--b-radius-sm:12px;--b-radius-pill:999px;--b-shadow:0 1px 2px #1018280f, 0 8px 24px #10182814;--b-shadow-lift:0 2px 4px #1018280f, 0 16px 40px #1018281f;--b-shadow-cta:0 1px 2px #173ea833, 0 8px 20px #1f4fd847;--b-focus:0 0 0 2px var(--b-bg), 0 0 0 4px var(--b-cobalt);--b-font:"Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--b-font-serif:"Newsreader", "Iowan Old Style", Georgia, serif;--b-font-hand:"Caveat", "Segoe Print", "Bradley Hand", cursive;--b-font-num:"IBM Plex Mono", "JetBrains Mono", ui-monospace, Menlo, monospace;--b-h1:clamp(2.5rem, 1.6rem + 3.6vw, 4.5rem);--b-h2:clamp(1.75rem, 1.35rem + 1.6vw, 2.5rem);--b-h3:1.375rem;--b-text-lg:1.1875rem;--b-text:1rem;--b-text-sm:.875rem;--b-text-xs:.8125rem;--b-ease:cubic-bezier(.2, .7, .2, 1);--b-dur:.18s;--dh-navy-950:#050f28;--dh-navy-900:#081738;--dh-navy-800:#0c2149;--dh-navy-700:#12305f;--dh-blue:#1a66f0;--dh-blue-hover:#2f78ff;--dh-glow:#2d8cff;--dh-lime:#c5f24b;--dh-lime-hover:#d6f875;--dh-on-lime:#081738;--dh-on-dark:#fff;--dh-on-dark-2:#ffffffd6;--dh-on-dark-3:#ffffffb3;--dh-line-on-dark:#ffffff29;--dh-hero-fallback:radial-gradient(60% 70% at 78% 18%, #1c5bb8 0%, transparent 70%), radial-gradient(40% 50% at 12% 88%, #1673d9 0%, transparent 72%), linear-gradient(180deg, #081738 0%, #0a1f4a 58%, #0c2a5e 100%);--dh-hero-scrim:linear-gradient(90deg, #050f28db 0%, #050f2894 42%, #050f281f 100%), linear-gradient(180deg, #050f2880 0%, transparent 26%, transparent 70%, #081738db 100%);--dh-hero-scrim-phone:linear-gradient(180deg, #050f28c7 0%, #050f28b3 60%, #081738e6 100%);--dh-band:linear-gradient(115deg, #081738 0%, #0c2a5e 56%, #0e3a7c 100%);--dh-strip:#081a40;--dh-glass:linear-gradient(160deg, #2848849e 0%, #0e2048bd 100%);--dh-glass-line:#ffffff47;--dh-tick:#5fd35f;--dh-teal-hero:linear-gradient(100deg, #061a33 0%, #07263f 46%, #0a3a4f 100%);--dh-teal-scrim:linear-gradient(90deg, #061d36 0%, #061d36d1 34%, #061d3600 62%);--dh-chip-biology:#c5f24b;--dh-chip-chemistry:#2bd9d6;--dh-chip-physics:#7a55f0;--dh-chip-on:#081738;--dh-chip-on-physics:#fff;--dh-metal:linear-gradient(180deg, #2b3243 0%, #151a26 100%);--dh-metal-base:linear-gradient(180deg, #c5cbd8 0%, #8c94a6 62%, #6a7284 100%);--dh-screen:#0a0f1c;--dh-device-drop:0 24px 40px #0208188c;--dh-radius-tick:6px;--dh-radius-screen:4px;--dh-radius-tablet:8px;--dh-ground:#f6f8fc;--dh-card:#fff;--dh-card-line:#e3e8f2;--dh-card-ink:#0d1b3e;--dh-card-ink-2:#48546e;--dh-teal-ink:#0a7a77;--dh-blue-ink:#1558d6;--dh-purple-ink:#6535c4;--dh-wash-teal:linear-gradient(180deg, #bdeee8 0%, #dcf6f2 62%, #fff 100%);--dh-wash-blue:linear-gradient(180deg, #bfdcff 0%, #deecff 62%, #fff 100%);--dh-wash-purple:linear-gradient(180deg, #d8c9fb 0%, #ece4fd 62%, #fff 100%);--dh-lens-glass:#eef6fb;--dh-lens-ink:#0d1b3e;--dh-lens-liquid:#2a8fe0;--elev-dh-card:0 1px 2px #0d1b3e0a, 0 8px 24px #0d1b3e0f;--elev-dh-card-lift:0 2px 4px #0d1b3e0f, 0 20px 48px #0d1b3e26;--elev-dh-lime:0 6px 24px #c5f24b52;--elev-dh-device:0 24px 64px #02081899;--elev-dh-glass:0 24px 56px #02081880, inset 0 1px 0 #fff3;--elev-dh-lens:0 8px 24px #0d1b3e38;--focus-dh:0 0 0 2px var(--dh-navy-900), 0 0 0 5px var(--dh-lime);--focus-dh-card:0 0 0 2px var(--dh-ground), 0 0 0 5px var(--dh-blue);--dh-h1:clamp(2.5rem, min(4.2vw, 8vh), 4.5rem);--dh-h1-page:clamp(2.25rem, min(4.2vw, 7.6vh), 4rem);--dh-h1-sub:clamp(2.25rem, min(3.6vw, 7vh), 3.5rem);--dh-sheet-radius:32px;--dh-h3-section:2rem;--dh-h2:clamp(1.75rem, 1.3rem + 1.7vw, 2.75rem);--dh-h3:clamp(1.375rem, 1.25rem + .4vw, 1.625rem);--dh-bar-h:56px;--dh-bar:color-mix(in srgb, var(--dh-navy-900) 90%, transparent);--dh-column:1360px;--dh-gutter:clamp(16px, 4.4vw, 64px);--dh-edge:max(var(--dh-gutter), calc((100% - var(--dh-column)) / 2 + var(--dh-gutter)))}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--b-cobalt:#3a64e6;--b-cobalt-deep:#2f55cc;--b-cobalt-ink:#8eabff;--b-cobalt-soft:#17244a;--b-teal:#3cc7c3;--b-teal-ink:#5fd6d2;--b-teal-soft:#0f2d33;--b-lime:#93db5f;--b-lime-ink:#a6e47a;--b-lime-soft:#1a2a17;--b-bg:#0b1220;--b-bg-soft:#0e1628;--b-surface:#121a2b;--b-surface-2:#172036;--b-ink:#eef2fb;--b-ink-2:#c3cbe0;--b-ink-3:#9aa5c0;--b-line:#222d45;--b-line-strong:#2f3b57;--b-on-cobalt:#fff;--b-on-cobalt-2:#fffc;--b-band:linear-gradient(135deg, #12235a 0%, #0f1d4b 50%, #0b1638 100%);--b-band-card:#ffffff0f;--b-band-card-hover:#ffffff1a;--b-band-line:#ffffff24;--b-band-deep:linear-gradient(120deg, #0a1438 0%, #0f2366 45%, #0b4d5e 100%);--b-purple:#a585f0;--b-tint-lab:linear-gradient(160deg, #15224a 0%, #142350 55%, #13265a 100%);--b-tint-practise:linear-gradient(160deg, #18261a 0%, #1b2f1c 55%, #1e371f 100%);--b-tint-course:linear-gradient(160deg, #0f2a29 0%, #11312f 55%, #133936 100%);--b-tint-line:#ffffff14;--b-bio-ink:#6fd396;--b-chem-ink:#b99bf5;--b-phys-ink:#7fb2ff;--b-bio-soft:#13291d;--b-chem-soft:#221a3a;--b-phys-soft:#13223d;--b-shadow:0 1px 2px #0006, 0 8px 24px #00000059;--b-shadow-lift:0 2px 4px #0006, 0 16px 40px #00000073;--b-shadow-cta:0 1px 2px #0006, 0 8px 20px #4f7bff4d;--b-focus:0 0 0 2px var(--b-bg), 0 0 0 4px #ffd566;--dh-ground:#081738;--dh-card:#0f2149;--dh-card-line:#ffffff1f;--dh-card-ink:#fff;--dh-card-ink-2:#ffffffc7;--dh-teal-ink:#6fe0da;--dh-blue-ink:#8fbcff;--dh-purple-ink:#c3adff;--dh-wash-teal:linear-gradient(180deg, #125a63 0%, #103f55 62%, #0f2149 100%);--dh-wash-blue:linear-gradient(180deg, #17498f 0%, #13346f 62%, #0f2149 100%);--dh-wash-purple:linear-gradient(180deg, #41308f 0%, #2a2569 62%, #0f2149 100%);--elev-dh-card:0 12px 32px #02081866;--elev-dh-card-lift:0 20px 48px #0208188c;--focus-dh-card:0 0 0 2px var(--dh-ground), 0 0 0 5px var(--dh-lime)}}:root[data-theme=dark],[data-theme=dark]{--b-cobalt:#3a64e6;--b-cobalt-deep:#2f55cc;--b-cobalt-ink:#8eabff;--b-cobalt-soft:#17244a;--b-teal:#3cc7c3;--b-teal-ink:#5fd6d2;--b-teal-soft:#0f2d33;--b-lime:#93db5f;--b-lime-ink:#a6e47a;--b-lime-soft:#1a2a17;--b-bg:#0b1220;--b-bg-soft:#0e1628;--b-surface:#121a2b;--b-surface-2:#172036;--b-ink:#eef2fb;--b-ink-2:#c3cbe0;--b-ink-3:#9aa5c0;--b-line:#222d45;--b-line-strong:#2f3b57;--b-on-cobalt:#fff;--b-on-cobalt-2:#fffc;--b-band:linear-gradient(135deg, #12235a 0%, #0f1d4b 50%, #0b1638 100%);--b-band-card:#ffffff0f;--b-band-card-hover:#ffffff1a;--b-band-line:#ffffff24;--b-band-deep:linear-gradient(120deg, #0a1438 0%, #0f2366 45%, #0b4d5e 100%);--b-purple:#a585f0;--b-tint-lab:linear-gradient(160deg, #15224a 0%, #142350 55%, #13265a 100%);--b-tint-practise:linear-gradient(160deg, #18261a 0%, #1b2f1c 55%, #1e371f 100%);--b-tint-course:linear-gradient(160deg, #0f2a29 0%, #11312f 55%, #133936 100%);--b-tint-line:#ffffff14;--b-bio-ink:#6fd396;--b-chem-ink:#b99bf5;--b-phys-ink:#7fb2ff;--b-bio-soft:#13291d;--b-chem-soft:#221a3a;--b-phys-soft:#13223d;--b-shadow:0 1px 2px #0006, 0 8px 24px #00000059;--b-shadow-lift:0 2px 4px #0006, 0 16px 40px #00000073;--b-shadow-cta:0 1px 2px #0006, 0 8px 20px #4f7bff4d;--b-focus:0 0 0 2px var(--b-bg), 0 0 0 4px #ffd566;--dh-ground:#081738;--dh-card:#0f2149;--dh-card-line:#ffffff1f;--dh-card-ink:#fff;--dh-card-ink-2:#ffffffc7;--dh-teal-ink:#6fe0da;--dh-blue-ink:#8fbcff;--dh-purple-ink:#c3adff;--dh-wash-teal:linear-gradient(180deg, #125a63 0%, #103f55 62%, #0f2149 100%);--dh-wash-blue:linear-gradient(180deg, #17498f 0%, #13346f 62%, #0f2149 100%);--dh-wash-purple:linear-gradient(180deg, #41308f 0%, #2a2569 62%, #0f2149 100%);--elev-dh-card:0 12px 32px #02081866;--elev-dh-card-lift:0 20px 48px #0208188c;--focus-dh-card:0 0 0 2px var(--dh-ground), 0 0 0 5px var(--dh-lime)}.b-page{background:var(--b-bg);color:var(--b-ink);font-family:var(--b-font)}.b-wrap{width:min(100% - 32px,1240px);margin-left:auto;margin-right:auto}.b-h1{font-family:var(--b-font);font-size:var(--b-h1);letter-spacing:-.035em;color:var(--b-ink);text-wrap:balance;margin:0;font-weight:700;line-height:1.02}.b-h2{font-family:var(--b-font);font-size:var(--b-h2);letter-spacing:-.025em;color:var(--b-ink);text-wrap:balance;margin:0;font-weight:700;line-height:1.1}.b-lede{font-size:var(--b-text-lg);color:var(--b-ink-2);text-wrap:pretty;margin:0;line-height:1.5}.b-kicker{font-size:var(--b-text-sm);letter-spacing:.02em;color:var(--b-cobalt-ink);margin:0;font-weight:600}.b-hl{color:var(--b-teal-ink)}.b-serif{font-family:var(--b-font-serif);letter-spacing:-.02em;color:var(--b-cobalt-ink);font-style:italic;font-weight:600}.b-hand{font-family:var(--b-font-hand);color:var(--b-ink-2);font-size:1.375rem;font-weight:600;line-height:1.1}.b-num{font-family:var(--b-font-num);font-variant-numeric:tabular-nums}@media screen{html:root,html [data-theme]{--font-data:var(--b-font);--b-font-num:var(--b-font)}html .rx-data{font-family:var(--b-font);font-variant-numeric:tabular-nums}html .ph{--ph-mono:var(--b-font)}html .rx{--rx-mono:var(--b-font)}}.b-card{background:var(--b-surface);color:var(--b-ink);border:1px solid var(--b-line);border-radius:var(--b-radius);box-shadow:var(--b-shadow)}.b-card--hover{transition:transform var(--b-dur) var(--b-ease), box-shadow var(--b-dur) var(--b-ease)}.b-card--hover:hover{box-shadow:var(--b-shadow-lift);transform:translateY(-2px)}.b-band{background:var(--b-band);color:var(--b-on-cobalt)}.b-band--deep{isolation:isolate;background:var(--b-band-deep);position:relative}.b-lines{z-index:-1;fill:none;stroke:#ffffff24;stroke-width:1.25px;pointer-events:none;width:100%;height:100%;position:absolute;top:0;bottom:0;left:0;right:0}.b-band__card{background:var(--b-band-card);border:1px solid var(--b-band-line);border-radius:var(--b-radius);color:var(--b-on-cobalt);transition:background var(--b-dur) var(--b-ease), transform var(--b-dur) var(--b-ease)}.b-band__card:hover{background:var(--b-band-card-hover)}.b-tint{border:1px solid var(--b-tint-line);border-radius:var(--b-radius);color:var(--b-ink);background:var(--b-tint-lab)}.b-tint--lab{background:var(--b-tint-lab)}.b-tint--practise{background:var(--b-tint-practise)}.b-tint--course{background:var(--b-tint-course)}.b-tab{border-radius:var(--b-radius) var(--b-radius) 0 0;background:var(--b-cobalt);min-height:56px;color:var(--b-on-cobalt);font-size:var(--b-text-sm);letter-spacing:.06em;text-transform:uppercase;align-items:center;gap:12px;padding:8px 20px 8px 12px;font-weight:700;display:flex}.b-tab .b-icon{background:#fff;width:40px;height:40px}.b-tab .b-icon svg{width:20px;height:20px}.b-tab--teal{background:#0c7d7a}.b-tab--teal .b-icon{color:#0b7f7c}.b-tab--cobalt{background:#1f4fd8}.b-tab--cobalt .b-icon{color:#1d47c4}.b-tab--purple{background:#6a3fc4}.b-tab--purple .b-icon{color:#6a3fc4}.b-ticks{gap:8px;margin:0;padding:0;list-style:none;display:grid}.b-ticks>*{padding-left:28px;line-height:1.4;position:relative}.b-ticks>:before{content:"";background:var(--b-bio) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5.5 10.5l3 3 6-7' fill='none' stroke='white' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 20px no-repeat;border-radius:50%;width:20px;height:20px;position:absolute;top:.1em;left:0}.b-btn{border-radius:var(--b-radius-pill);min-height:44px;font:inherit;font-size:var(--b-text);cursor:pointer;transition:background var(--b-dur) var(--b-ease), transform var(--b-dur) var(--b-ease), box-shadow var(--b-dur) var(--b-ease), border-color var(--b-dur) var(--b-ease);border:1px solid #0000;justify-content:center;align-items:center;gap:10px;padding:0 24px;font-weight:600;line-height:1;text-decoration:none;display:inline-flex}.b-btn:focus-visible{box-shadow:var(--b-focus);outline:none}.b-btn svg{transition:transform var(--b-dur) var(--b-ease);flex:none}.b-btn:hover svg{transform:translate(2px)}.b-btn--lg{min-height:56px;font-size:var(--b-text-lg);padding:0 32px}.b-btn--cta{background:var(--b-cobalt);color:var(--b-on-cobalt);box-shadow:var(--b-shadow-cta)}.b-btn--cta:hover{background:var(--b-cobalt-deep);transform:translateY(-1px)}.b-btn--cta:focus-visible{box-shadow:var(--b-focus), var(--b-shadow-cta)}.b-band .b-btn--cta{background:var(--b-lime);color:#10230a;box-shadow:0 1px 2px #0003,0 8px 20px #7ac9434d}.b-band .b-btn--cta:hover{background:#8bd655}.b-band .b-card .b-btn--cta{background:var(--b-cobalt);color:var(--b-on-cobalt);box-shadow:var(--b-shadow-cta)}.b-band .b-card .b-btn--cta:hover{background:var(--b-cobalt-deep)}.b-btn--ghost{background:var(--b-surface);color:var(--b-cobalt-ink);border-color:var(--b-cobalt)}.b-btn--ghost:hover{background:var(--b-cobalt-soft)}.b-btn--round{background:var(--b-surface);width:44px;height:44px;min-height:44px;color:var(--b-cobalt-ink);border-color:var(--b-line);box-shadow:var(--b-shadow);padding:0}.b-band .b-btn--round{color:var(--b-cobalt-deep);background:#fff;border-color:#0000}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .b-btn--round{background:var(--b-cobalt);color:#fff;border-color:#0000}}:root[data-theme=dark] .b-btn--round{background:var(--b-cobalt);color:#fff;border-color:#0000}.b-chip{border-radius:var(--b-radius-pill);background:var(--b-cobalt-soft);min-height:28px;color:var(--b-cobalt-ink);font-size:var(--b-text-xs);align-items:center;gap:8px;padding:0 12px;font-weight:600;line-height:1;display:inline-flex}.b-icon{background:var(--b-cobalt-soft);width:56px;height:56px;color:var(--b-cobalt-ink);border-radius:50%;flex:none;place-items:center;display:inline-grid}.b-icon svg{width:26px;height:26px}.b-chip--cobalt,.b-icon--cobalt{background:var(--b-cobalt-soft);color:var(--b-cobalt-ink)}.b-chip--teal,.b-icon--teal{background:var(--b-teal-soft);color:var(--b-teal-ink)}.b-chip--lime,.b-icon--lime{background:var(--b-lime-soft);color:var(--b-lime-ink)}.b-chip--bio,.b-icon--bio{background:var(--b-bio-soft);color:var(--b-bio-ink)}.b-chip--chem,.b-icon--chem{background:var(--b-chem-soft);color:var(--b-chem-ink)}.b-chip--phys,.b-icon--phys{background:var(--b-phys-soft);color:var(--b-phys-ink)}[data-subject=biology]{--b-subject:var(--b-bio);--b-subject-ink:var(--b-bio-ink);--b-subject-soft:var(--b-bio-soft)}[data-subject=chemistry]{--b-subject:var(--b-chem);--b-subject-ink:var(--b-chem-ink);--b-subject-soft:var(--b-chem-soft)}[data-subject=physics]{--b-subject:var(--b-phys);--b-subject-ink:var(--b-phys-ink);--b-subject-soft:var(--b-phys-soft)}@media (prefers-reduced-motion:reduce){.b-card--hover,.b-band__card,.b-btn,.b-btn svg{transition:none}.b-card--hover:hover,.b-btn--cta:hover,.b-btn:hover svg{transform:none}}html body.sw-bright{--sw-serif:var(--b-font);--font-display:var(--b-font);--font-head:var(--b-font);color:var(--b-ink)}html body.sw-bright .hub-h1,html body.sw-bright .sw-h1,html body.sw-bright .ph h1,html body.sw-bright .ap-head h1,html body.sw-bright .sh-subject-home .hub-h1{font-family:var(--b-font);letter-spacing:-.035em;color:var(--b-ink);font-weight:700;line-height:1.04}html body.sw-bright .sw-h2,html body.sw-bright .hub-h2,html body.sw-bright .ph h2,html body.sw-bright .sh-subject-home h2,html body.sw-bright main h2,html body.sw-bright main h3{font-family:var(--b-font);letter-spacing:-.02em;font-weight:700}html body.sw-bright .hub-lede,html body.sw-bright .sw-lede,html body.sw-bright .ap-lede{color:var(--b-ink-2)}html body.sw-bright .sw-mark,html body.sw-bright .ph .ph-eyebrow,html body.sw-bright .hub-overline,html body.sw-bright .product-pricing__eyebrow{color:var(--b-cobalt-ink);font:600 var(--b-text-sm) / 1.4 var(--b-font);letter-spacing:.02em;text-transform:none}html body.sw-bright .sw-mark__n{color:var(--b-cobalt-ink)}html body.sw-bright .hub-crumbs ol{font:400 var(--b-text-sm) / 1.4 var(--b-font);letter-spacing:0;text-transform:none;color:var(--b-ink-3)}html body.sw-bright .hub-crumbs a{color:var(--b-cobalt-ink);font-weight:600;text-decoration:none}html body.sw-bright .hub-crumbs a:hover{text-underline-offset:3px;text-decoration:underline}html body.sw-bright .hub-crumbs [aria-current=page]{color:var(--b-ink-2);font-weight:600}html body.sw-bright{background:linear-gradient(to bottom, var(--b-bg-soft) 0, var(--b-bg) 32rem) top / 100% 32rem no-repeat, var(--b-bg)}html body.sw-bright .sw-head:before,html body.sw-bright .ap-head:before,html body.sw-bright .hub-pagehead:before,html body.sw-bright .sh-subject-opening:before,html body.sw-bright .hx-hero:before{opacity:1;border-bottom:1px solid var(--b-line);background:radial-gradient(40% 90% at 100% 0%, color-mix(in srgb, var(--b-teal) 12%, transparent), transparent 70%), radial-gradient(40% 90% at 0% 100%, color-mix(in srgb, var(--b-cobalt) 9%, transparent), transparent 70%), var(--b-bg-soft);-webkit-mask-image:none;mask-image:none}html body.sw-bright .hub-btn,html body.sw-bright .ph-open-workspace,html body.sw-bright .sh-subject-preview a{border-radius:var(--b-radius-pill);font-family:var(--b-font)}html body.sw-bright .ap .ap-actions .ph-open-workspace{border-radius:var(--b-radius-pill)}html body.sw-bright .hub-btn--primary,html body.sw-bright .ph-open-workspace,html body.sw-bright .sh-subject-preview a{border-color:var(--b-cobalt);background:var(--b-cobalt);color:var(--b-on-cobalt);box-shadow:var(--b-shadow-cta)}html body.sw-bright .hub-btn--primary:hover,html body.sw-bright .ph-open-workspace:hover,html body.sw-bright .sh-subject-preview a:hover{border-color:var(--b-cobalt-deep);background:var(--b-cobalt-deep)}html body.sw-bright .hub-btn--quiet{border:1.5px solid var(--b-cobalt);background:var(--b-surface);color:var(--b-cobalt-ink)}html body.sw-bright .hub-btn--quiet:hover{background:var(--b-cobalt-soft)}html body.sw-bright .sw-link,html body.sw-bright .ph-secondary{color:var(--b-cobalt-ink)}html body.sw-bright .ap-notice,html body.sw-bright .sw-receipt,html body.sw-bright .sh-subject-preview,html body.sw-bright .sh-subject-courses nav a{border:1px solid var(--b-line);border-radius:var(--b-radius);background:var(--b-surface);box-shadow:var(--b-shadow)}html body.sw-bright .ap-notice{padding:var(--space-5) var(--space-6)}html body.sw-bright .sh-subject-courses nav a{border-radius:var(--b-radius-sm)}html body.sw-bright .sh-subject-courses nav a:hover{border-color:var(--b-cobalt);background:var(--b-cobalt-soft)}html body.sw-bright .ap-section>h2+p{margin-top:var(--space-3)}html body.sw-bright .ap-notice h2,html body.sw-bright .sw-receipt__head,html body.sw-bright .sw-receipt dt,html body.sw-bright .sw-boards__name,html body.sw-bright .ap-steps__k{color:var(--b-cobalt-ink);font:600 var(--b-text-sm) / 1.4 var(--b-font);letter-spacing:0;text-transform:none}html body.sw-bright .ap-steps>li{border-top-color:var(--b-cobalt)}html body.sw-bright .ap-bench img,html body.sw-bright .ap-visual img,html body.sw-bright .hub-plate img{border-color:var(--b-line);border-radius:var(--b-radius-md);box-shadow:var(--b-shadow)}html body .sw-foot{border-top-color:var(--b-line);background:var(--b-bg-soft)}html body .sw-foot .hub-footer__head{color:var(--b-ink);font:700 var(--b-text-sm) / 1.4 var(--b-font);letter-spacing:0;text-transform:none}html body .sw-foot .hub-footer__cols a{color:var(--b-ink-2)}html body .sw-foot .hub-footer__cols a:hover{color:var(--b-cobalt-ink)}html body:not(.sw-bright) .sw-foot{margin-top:0}@media (min-width:1000px){html body:not(.sw-bright) .sw-foot .hub-footer__in{max-width:1240px;padding-inline:var(--space-6)}}.bp-faq{gap:var(--space-6);font-family:var(--b-font);display:grid}.bp-faq .faq{gap:var(--space-7)}.bp-faq .faq__jump ul{gap:var(--space-2)}.bp-faq .faq__jump a{min-height:40px;padding:0 var(--space-4);border:1.5px solid var(--b-line-strong);border-radius:var(--b-radius-pill);background:var(--b-surface);color:var(--b-ink);font:600 var(--b-text-sm) / 1.2 var(--b-font);align-items:center;text-decoration:none;display:inline-flex}.bp-faq .faq__jump a:hover{border-color:var(--b-cobalt);color:var(--b-cobalt-ink)}.bp-faq .faq__jump a:focus-visible{box-shadow:var(--b-focus);outline:none}.bp-faq .faq__group{gap:var(--space-4)}.bp-faq .faq__title{color:var(--b-ink);font:700 var(--b-h3) / 1.2 var(--b-font);letter-spacing:-.015em}.bp-faq .faq__list{border:1px solid var(--b-line);border-radius:var(--b-radius);background:var(--b-surface);box-shadow:var(--b-shadow);overflow:hidden}.bp-faq .faq__item{border-bottom:1px solid var(--b-line)}.bp-faq .faq__item:last-child{border-bottom:0}.bp-faq .faq__q{min-height:56px;padding:var(--space-4) var(--space-5);color:var(--b-ink);font:600 var(--b-text) / 1.4 var(--b-font)}.bp-faq .faq__q:hover{color:var(--b-cobalt-ink)}.bp-faq .faq__q:focus-visible{box-shadow:inset 0 0 0 2px var(--b-cobalt);outline:none}.bp-faq .faq__chev{box-sizing:content-box;padding:var(--space-2);border-radius:var(--b-radius-pill);background:var(--b-cobalt-soft);color:var(--b-cobalt-ink)}.bp-faq .faq__a{padding:0 var(--space-5) var(--space-5);color:var(--b-ink-2);font:400 var(--b-text) / 1.6 var(--b-font)}.bp-faq .faq__a a,.bp-faq .faq__inline{color:var(--b-cobalt-ink);font-weight:600}.bp-faq .faq__perma a,.bp-faq .faq__perma button{color:var(--b-ink-3)}.bp-faq__tes{padding:var(--space-5) var(--space-6)}.bp-faq__tes .sp-tes{color:var(--b-ink-2);font-family:var(--b-font);border-top:0;padding:0}.bp-faq__tes .sp-tes__title{color:var(--b-ink);font:700 var(--b-text-lg) / 1.3 var(--b-font)}.bp-faq__tes .sp-tes__link a{color:var(--b-cobalt-ink);font-weight:600}.bp-faq__art.ta{justify-self:center;width:min(100%,320px)}.bp-faq__pay{color:var(--b-ink-2)}.bp-faq__pay .sp-payline__free{color:var(--b-ink)}@media (max-width:640px){.bp-faq .faq__q{padding:var(--space-3) var(--space-4)}.bp-faq .faq__a{padding:0 var(--space-4) var(--space-4)}.bp-faq__tes{padding:var(--space-4)}.bp-faq__art.ta{display:none}}.dh-wrap{box-sizing:border-box;width:min(100%, var(--dh-column));padding-inline:var(--dh-gutter);margin-left:auto;margin-right:auto}.dh-h1{color:var(--dh-on-dark);font:700 var(--dh-h1) / 1.04 var(--b-font);letter-spacing:-.035em;margin:0}.dh-h1__line{display:block}.dh-lime{color:var(--dh-lime)}.dh-h2{color:var(--dh-on-dark);font:700 var(--dh-h2) / 1.12 var(--b-font);letter-spacing:-.025em;margin:0}.dh-note{color:var(--dh-on-dark-2);font-size:var(--b-text-sm);margin:0}.dh-btn{border-radius:var(--b-radius-pill);min-height:48px;font:700 var(--b-text) / 1.2 var(--b-font);cursor:pointer;transition:background-color var(--b-dur) var(--b-ease), transform var(--b-dur) var(--b-ease);border:0;justify-content:center;align-items:center;gap:12px;padding:12px 32px;text-decoration:none;display:inline-flex}.dh-btn--lime{background:var(--dh-lime);min-height:56px;box-shadow:var(--elev-dh-lime);color:var(--dh-on-lime);font-size:var(--b-text-lg)}.dh-btn--lime:hover{background:var(--dh-lime-hover);color:var(--dh-on-lime);transform:translateY(-1px)}.dh-btn--blue{background:var(--dh-blue);color:var(--dh-on-dark)}.dh-btn--blue:hover{background:var(--dh-blue-hover);color:var(--dh-on-dark)}.dh-btn:focus-visible{box-shadow:var(--focus-dh);outline:0}.dh-link:focus-visible{box-shadow:var(--focus-dh);outline:0}.dh-arrow{flex:none}.dh-art{background:var(--dh-hero-fallback);position:absolute;top:0;bottom:0;left:0;right:0;overflow:hidden}.dh-art picture{display:contents}.dh-art img{object-fit:cover;width:100%;height:100%;position:absolute;top:0;bottom:0;left:0;right:0}.dh-art__scrim{background:var(--dh-hero-scrim);position:absolute;top:0;bottom:0;left:0;right:0}@media (max-width:999.98px){.dh-art__scrim{background:var(--dh-hero-scrim-phone)}}.dh-art--cta .dh-art__scrim{background:linear-gradient(90deg, var(--dh-navy-950) 0%, var(--dh-navy-950) 24%, transparent 62%);opacity:.8}.dh-hero{isolation:isolate;margin-top:calc(-1 * var(--dh-bar-h));padding-top:var(--dh-bar-h);background:var(--dh-navy-900);color:var(--dh-on-dark);position:relative;overflow:hidden}.dh-hero__in{grid-template-rows:auto 1fr;grid-template-columns:minmax(0,5fr) minmax(0,8fr);padding-top:max(16px,min(3.4vh,32px));padding-bottom:max(24px,min(4vh,48px));display:grid;position:relative}.dh-hero__head{z-index:2;grid-area:1/1/auto/-1;position:relative}.dh-hero__copy{z-index:2;grid-area:2/1;align-self:start;max-width:34rem;padding-top:16px;position:relative}.dh-hero__stage{z-index:1;margin-top:calc(2.4 * 1.04 * var(--dh-h1));grid-area:1/2/span 2;position:relative}.dh-hero__lede{color:var(--dh-on-dark);font-size:clamp(var(--b-text), .9rem + .35vw, 1.25rem);margin:0 0 24px;line-height:1.45}.dh-hero__note{color:var(--dh-on-dark-2);font-size:var(--b-text-sm);margin:12px 0 0}@media (max-width:999.98px){.dh-hero__in{flex-direction:column;display:flex}.dh-hero__stage{margin-top:32px}}.dh-screen{background:var(--dh-screen);position:relative;overflow:hidden}.dh-screen img,.dh-screen video{object-fit:cover;object-position:top left;width:100%;height:100%;display:block}.dh-screen video{opacity:0;transition:opacity .4s var(--b-ease);position:absolute;top:0;bottom:0;left:0;right:0}[data-playing] .dh-screen video{opacity:1}.dh-laptop{filter:drop-shadow(var(--dh-device-drop))}.dh-laptop__lid{border-radius:var(--b-radius-md) var(--b-radius-md) 0 0;background:var(--dh-metal);padding:2% 2% 2.4%}.dh-screen--laptop{aspect-ratio:16/10;border-radius:var(--dh-radius-screen)}.dh-laptop__base{border-radius:0 0 var(--b-radius-md) var(--b-radius-md);background:var(--dh-metal-base);width:112%;height:max(8px,min(1.2vw,16px));margin-left:-6%;display:block}.dh-tablet{border-radius:var(--b-radius-md);background:var(--dh-metal);box-shadow:var(--elev-dh-device);padding:1.8%}.dh-screen--tablet{aspect-ratio:16/10;border-radius:var(--dh-radius-tablet)}.dh-glass{border:1px solid var(--dh-glass-line);border-radius:var(--b-radius);background:var(--dh-navy-800);box-shadow:var(--elev-dh-glass);color:var(--dh-on-dark)}@supports ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){.dh-glass{background:var(--dh-glass);-webkit-backdrop-filter:blur(16px)saturate(1.3);backdrop-filter:blur(16px)saturate(1.3)}}.dh-strip{background:var(--dh-strip);color:var(--dh-on-dark)}.dh-strip__list{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:0;margin-bottom:0;padding-top:16px;padding-bottom:16px;list-style:none;display:grid}.dh-strip__item{justify-content:center;align-items:center;gap:16px;padding:8px 16px;display:flex}.dh-strip__item+.dh-strip__item{border-left:1px solid var(--dh-line-on-dark)}.dh-strip__icon{color:var(--dh-on-dark);flex:none;display:flex}.dh-strip__text{font-size:var(--b-text-lg);line-height:1.25;display:grid}.dh-strip__lead{font-weight:700}.dh-strip__rest{color:var(--dh-on-dark-2);font-size:var(--b-text)}@media (max-width:759.98px){.dh-strip__list{grid-template-columns:1fr}.dh-strip__item{justify-content:flex-start;padding-left:0;padding-right:0}.dh-strip__item+.dh-strip__item{border-top:1px solid var(--dh-line-on-dark);border-left:0}}.dh-offers{background:var(--dh-ground);padding-top:max(32px,min(4vw,48px));padding-bottom:max(32px,min(4vw,48px))}.dh-offers__grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:max(16px,min(2vw,24px));margin-top:0;margin-bottom:0;list-style:none;display:grid}.dh-offers__grid>li{min-width:0}.dh-offer{--dh-tone:var(--dh-teal-ink);--dh-wash:var(--dh-wash-teal);grid-row:span 2;grid-template-rows:subgrid;border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);box-shadow:var(--elev-dh-card);transition:transform var(--b-dur) var(--b-ease), box-shadow var(--b-dur) var(--b-ease);row-gap:0;display:grid;overflow:hidden}.dh-offer:hover{box-shadow:var(--elev-dh-card-lift);transform:translateY(-2px)}.dh-offer--blue{--dh-tone:var(--dh-blue-ink);--dh-wash:var(--dh-wash-blue)}.dh-offer--purple{--dh-tone:var(--dh-purple-ink);--dh-wash:var(--dh-wash-purple)}.dh-offer__hit{width:100%;color:var(--dh-card-ink);font:inherit;text-align:left;cursor:pointer;background:0 0;border:0;flex-direction:column;flex:1;padding:0;text-decoration:none;display:flex}.dh-offer__hit:hover{color:var(--dh-card-ink)}.dh-offer__hit:focus-visible{outline:0}.dh-offer:has(.dh-offer__hit:focus-visible){outline:3px solid var(--dh-blue);outline-offset:3px}.dh-offer__after{border-top:1px solid var(--dh-card-line);color:var(--dh-card-ink-2);font-size:var(--b-text-sm);padding:12px 24px 16px}.dh-offer__after a{color:var(--dh-tone)}.dh-offer__after a:focus-visible{outline:3px solid var(--dh-blue);outline-offset:2px}.dh-offer__art{background:var(--dh-wash);height:max(220px,min(19vw,280px));display:block;position:relative;overflow:hidden}.dh-offer__art img{object-fit:contain;display:block;position:absolute}.dh-offer__body{flex:1;align-content:start;gap:8px;padding:16px 24px 24px;display:grid}.dh-offer__title{font:700 var(--dh-h3) / 1.2 var(--b-font);letter-spacing:-.02em}.dh-offer__text{color:var(--dh-card-ink-2);font-size:var(--b-text);line-height:1.45}.dh-offer__more{color:var(--dh-tone);align-items:center;gap:8px;margin-top:8px;font-weight:700;display:inline-flex}.dh-offer__hit:hover .dh-arrow{transform:translate(3px)}.dh-arrow{transition:transform var(--b-dur) var(--b-ease)}@media (max-width:859.98px){.dh-offers__grid{grid-template-columns:1fr}}.dh-loop{background:var(--dh-band);color:var(--dh-on-dark);padding-top:max(32px,min(4vw,48px));padding-bottom:max(32px,min(4vw,48px))}.dh-loop__head{text-align:center;margin-bottom:max(24px,min(3vw,32px))}.dh-loop__lede{color:var(--dh-on-dark-2);font-size:var(--b-text-lg);margin:8px 0 0}.dh-loop__steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:max(24px,min(4vw,64px));margin:0;padding:0;list-style:none;display:grid}.dh-step{grid-template-columns:auto auto minmax(0,1fr);align-items:start;gap:16px;display:grid;position:relative}.dh-step+.dh-step:before{content:"";background:var(--dh-on-dark-3);width:calc(max(24px,min(4vw,64px)) - 16px);height:1px;position:absolute;top:24px;left:calc(-1*max(24px,min(4vw,64px)) + 8px)}.dh-step+.dh-step:after{content:"";border-top:1px solid var(--dh-on-dark-3);border-right:1px solid var(--dh-on-dark-3);width:7px;height:7px;position:absolute;top:21px;left:-14px;transform:rotate(45deg)}.dh-step__n{background:var(--dh-on-dark);width:48px;height:48px;color:var(--dh-blue);font:700 var(--b-text-lg) / 1 var(--b-font);border-radius:50%;place-items:center;display:grid}.dh-step__icon{color:var(--dh-on-dark);display:flex}.dh-step__words{gap:4px;display:grid}.dh-step__title{font-size:var(--b-text-lg);font-weight:700;line-height:1.25}.dh-step__text{color:var(--dh-on-dark-2);font-size:var(--b-text-sm);line-height:1.45}@media (max-width:899.98px){.dh-loop__steps{grid-template-columns:1fr}.dh-step+.dh-step:before,.dh-step+.dh-step:after{display:none}}.dh-cta{isolation:isolate;background:var(--dh-navy-900);color:var(--dh-on-dark);position:relative;overflow:hidden}.dh-cta__in{text-align:center;justify-items:center;gap:16px;padding-top:max(48px,min(7vw,96px));padding-bottom:max(48px,min(7vw,96px));display:grid;position:relative}.dh-cta__title{max-width:18em}@media (min-width:1000px){.dh-cta__in{text-align:left;justify-items:start}.dh-cta__title{max-width:12em}}@media (max-width:999.98px){.dh-art--cta .dh-art__scrim{background:radial-gradient(60% 90% at 50% 50%, var(--dh-navy-950) 0%, transparent 100%);opacity:.74}}@media (min-width:1024px){html:root body:has(.dh-hero) .ap-rail{border-bottom-color:var(--dh-line-on-dark);background:var(--dh-bar)}html:root body:has(.dh-hero) .ap-rail .ap-nav>ul>li>.ap-nav__item{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-rail .ap-nav>ul>li>.ap-nav__item .gn-lab__chev{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-rail .ap-nav>ul>li>.ap-nav__item:hover{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-rail .ap-nav>ul>li>.ap-nav__item[aria-expanded=true]{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-rail .ap-nav>ul>li>.ap-nav__item[aria-current]:after{background:var(--dh-lime)}html:root body:has(.dh-hero) .ap-rail>.ap-search{border-color:var(--dh-line-on-dark);color:var(--dh-on-dark);background:0 0}html:root body:has(.dh-hero) .ap-rail .ap-rail__foot .ap-course{border-color:var(--dh-line-on-dark);color:var(--dh-on-dark);background:0 0}html:root body:has(.dh-hero) .ap-rail>.ap-search:hover{border-color:var(--dh-on-dark-2);background:var(--dh-line-on-dark)}html:root body:has(.dh-hero) .ap-rail .ap-rail__foot .ap-course:hover{border-color:var(--dh-on-dark-2);background:var(--dh-line-on-dark)}html:root body:has(.dh-hero) .ap-rail .ap-search__label{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-rail .ap-nav__icon{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-rail .ap-course__icon{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-rail .ap-course__value{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-rail .ap-course__chev{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-rail .ap-rail-settings{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-rail .ap-search__keys{border-color:var(--dh-line-on-dark);background:var(--dh-line-on-dark);color:var(--dh-on-dark)}}html:root body:has(.dh-hero) .ap-top{border-bottom-color:var(--dh-line-on-dark);background:var(--dh-bar);-webkit-backdrop-filter:saturate(1.4)blur(12px);backdrop-filter:saturate(1.4)blur(12px)}html:root body:has(.dh-hero) .ap-top__icon{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-top .ap-account{color:var(--dh-on-dark)}body:has(.dh-hero) .sw-bar{border-bottom-color:var(--dh-line-on-dark);background:var(--dh-bar);-webkit-backdrop-filter:saturate(1.4)blur(12px);backdrop-filter:saturate(1.4)blur(12px)}body:has(.dh-hero) .sw-bar .sw-nav__item{color:var(--dh-on-dark)}body:has(.dh-hero) .sw-bar .sw-nav__item:hover{color:var(--dh-on-dark)}body:has(.dh-hero) .sw-bar .sw-chip{color:var(--dh-on-dark)}body:has(.dh-hero) .sw-bar .sw-chip__k{color:var(--dh-on-dark)}body:has(.dh-hero) .sw-bar .sw-chip__icon{color:var(--dh-on-dark)}body:has(.dh-hero) .sw-bar .hub-menu__chev{color:var(--dh-on-dark)}body:has(.dh-hero) .sw-bar .sw-bar__btn{color:var(--dh-on-dark)}@media (min-width:1024px){body:has(.dh-hero) .sw-bar .sw-nav__item svg{display:none}}body:has(.dh-hero) .sw-bar .sw-chip{border-color:var(--dh-line-on-dark);background:0 0}body:has(.dh-hero) .sw-bar .sw-chip:hover{background:var(--dh-line-on-dark);color:var(--dh-on-dark)}body:has(.dh-hero) .sw-bar .sw-board[open]>.sw-chip{background:var(--dh-line-on-dark);color:var(--dh-on-dark)}body:has(.dh-hero) .sw-bar .sw-bar__btn:hover{background:var(--dh-line-on-dark);color:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-rail .shb-w{fill:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-top .shb-w{fill:var(--dh-on-dark)}html:root body:has(.dh-hero) .sw-bar .shb-w{fill:var(--dh-on-dark)}html:root body:has(.dh-hero) .sw-foot .shb-w{fill:var(--dh-on-dark)}html:root body:has(.dh-hero) .ap-rail :focus-visible{outline:3px solid var(--dh-lime);outline-offset:2px;box-shadow:none}html:root body:has(.dh-hero) .ap-top :focus-visible{outline:3px solid var(--dh-lime);outline-offset:2px;box-shadow:none}body:has(.dh-hero) .sw-bar :focus-visible{outline:3px solid var(--dh-lime);outline-offset:2px;box-shadow:none}html:root body:has(.dh-hero) .gn-footer{border-top:1px solid var(--dh-line-on-dark);background:var(--dh-navy-950);color:var(--dh-on-dark-2)}body:has(.dh-hero) .sw-foot{border-top:1px solid var(--dh-line-on-dark);background:var(--dh-navy-950);color:var(--dh-on-dark-2)}html:root body:has(.dh-hero) .gn-footer__mark{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .gn-footer__head{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .gn-footer__mark b{color:var(--dh-on-dark)}body:has(.dh-hero) .sw-foot .hub-footer__head{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .gn-footer .sh-footer__link{color:var(--dh-on-dark-2)}html:root body:has(.dh-hero) .gn-footer p{color:var(--dh-on-dark-2)}html:root body:has(.dh-hero) .gn-footer strong{color:var(--dh-on-dark-2)}html body:has(.dh-hero) .sw-foot .hub-footer__cols a{color:var(--dh-on-dark-2)}html body:has(.dh-hero) .sw-foot a{color:var(--dh-on-dark-2)}html body:has(.dh-hero) .sw-foot p{color:var(--dh-on-dark-2)}html body:has(.dh-hero) .sw-foot .dh-tes{color:var(--dh-on-dark-2)}html:root body:has(.dh-hero) .gn-footer .sh-footer__link:hover{color:var(--dh-on-dark)}html body:has(.dh-hero) .sw-foot .hub-footer__cols a:hover{color:var(--dh-on-dark)}html body:has(.dh-hero) .sw-foot a:hover{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .gn-footer .sh-footer__line{border-top-color:var(--dh-line-on-dark);color:var(--dh-on-dark-2)}html:root body:has(.dh-hero) .gn-footer .sh-footer__name{color:var(--dh-on-dark)}html:root body:has(.dh-hero) .gn-footer__art svg{stroke:var(--dh-on-dark-3)}html:root body:has(.dh-hero) .gn-footer :focus-visible{outline:3px solid var(--dh-lime);outline-offset:2px;box-shadow:none}body:has(.dh-hero) .sw-foot :focus-visible{outline:3px solid var(--dh-lime);outline-offset:2px;box-shadow:none}body:has(>#root:empty){background:var(--dh-navy-900)}.dh-load__band{min-height:100vh;min-height:100dvh}.dh-load__in{justify-items:start;gap:16px;padding-top:max(32px,min(6vh,64px));padding-bottom:max(32px,min(6vh,64px));display:grid}.dh-load__bar{border-radius:var(--b-radius-pill);background:var(--dh-line-on-dark);height:16px;display:block}.dh-load__bar--head{width:min(100%,560px);height:var(--dh-h1-sub);margin-bottom:8px}.dh-load__bar--line{width:min(100%,440px)}.dh-load__bar--short{width:min(100%,300px)}.dh-load__label{color:var(--dh-on-dark-2);font-size:var(--b-text-sm);margin:8px 0 0}@media (prefers-reduced-motion:no-preference){:root:not([data-reduced-motion=true]) .dh-load__in{animation:dh-load-in .3s var(--b-ease) .16s both}}@keyframes dh-load-in{0%{opacity:0}}@media (prefers-reduced-motion:no-preference){:root:not([data-reduced-motion=true]) .dh-home[data-motion] [data-reveal]{transition:opacity .5s var(--b-ease), transform .5s var(--b-ease), box-shadow var(--b-dur) var(--b-ease);transition-delay:calc(var(--reveal-i,0) * 70ms)}:root:not([data-reduced-motion=true]) .dh-home[data-motion] [data-reveal]:not([data-shown]){opacity:0;transform:translateY(12px)}}.dh-returning{background:var(--dh-ground);padding-top:max(24px,min(3vw,32px));padding-bottom:0}@media (prefers-reduced-motion:reduce){.dh-btn,.dh-offer,.dh-arrow,.dh-screen video{transition:none}.dh-btn--lime:hover,.dh-offer:hover,.dh-offer__hit:hover .dh-arrow{transform:none}}:root[data-reduced-motion=true] .dh-btn,:root[data-reduced-motion=true] .dh-offer,:root[data-reduced-motion=true] .dh-arrow{transition:none;transform:none}html:root{--nav-h:var(--dh-bar-h);--sw-bar-h:var(--dh-bar-h)}.sw-bar__in{height:calc(var(--sw-bar-h) - 1px)}@media (min-width:1024px){.sw-bar__in{padding-inline:var(--dh-edge)}.sw-nav{margin-left:32px}.sw-nav__item{font-size:1rem}html:root body .ap-rail{padding-inline:var(--dh-edge)}html:root body:has(.ws-chrome[data-rail-hidden=true]) .ap-rail{padding-inline:var(--dh-edge)}}html:root body .gn-footer{padding-left:0;padding-right:0}html:root body .gn-footer .sh-footer__inner,html:root body .sw-foot.hub-footer .hub-footer__in{box-sizing:border-box;width:min(100%, var(--dh-column));max-width:none;padding-inline:var(--dh-gutter);margin-left:auto;margin-right:auto}html body:has(.dh-hero):has(.sw-bar>.hub-continue:not([hidden])) .sw-bar{background:var(--dh-navy-900)}html body:has(.dh-hero) .sw-bar>.hub-continue:not([hidden]){padding-inline:var(--dh-edge);border-color:var(--dh-line-on-dark);background:var(--dh-navy-900)}html body:has(.dh-hero) .sw-bar>.hub-continue .hub-continue__a{color:var(--dh-on-dark)}html body:has(.dh-hero) .sw-bar>.hub-continue .hub-continue__k{color:var(--dh-on-dark)}html body:has(.dh-hero) .sw-bar>.hub-continue [data-continue-label]{color:var(--dh-on-dark)}html body:has(.dh-hero) .sw-bar>.hub-continue .hub-continue__a:focus-visible{box-shadow:var(--focus-dh)}html:root .ds-hero--tall .dh-h1,html:root .ds-hero--tall .ds-hero__in--stage .dh-h1,html:root .dp-hero:not(.dp-hero--compact) .dp-h1,html:root .lb-pp__hero .dh-h1,html:root .la .lb-pp .la-pp__title,html:root .dl-hero .dh-h1,html:root .dl-pptitle{font-size:var(--dh-h1-page)}html:root .ds-hero--compact .dh-h1,html:root .dp-hero--compact .dp-h1{font-size:var(--dh-h1-sub)}.dh-hero+.dh-strip{padding-bottom:var(--dh-sheet-radius);position:relative}.ds-hero:not(:has(+.dh-strip)) .ds-hero__in{padding-bottom:calc(var(--dh-sheet-radius) + clamp(32px, 5vh, 56px))}.dh-hero+.dh-strip:after{content:"";left:0;right:0;z-index:2;height:var(--dh-sheet-radius);border-radius:var(--dh-sheet-radius) var(--dh-sheet-radius) 0 0;background:var(--dh-ground);pointer-events:none;position:absolute;bottom:0}.ds-hero:not(:has(+.dh-strip)):after{content:"";left:0;right:0;z-index:2;height:var(--dh-sheet-radius);border-radius:var(--dh-sheet-radius) var(--dh-sheet-radius) 0 0;background:var(--dh-ground);pointer-events:none;position:absolute;bottom:0}body:has(.ds-hero) .hub-crumbs:not(:has(li:nth-child(3))){display:none}.ds-hero__crumbs:not(:has(li:nth-child(3))){display:none}body:has(.ds-hero):has(.sw-bar>.hub-continue:not([hidden])) .hub-crumbs{top:calc(var(--dh-bar-h) + 45px)}html:root .hub-aside__card,html:root .hub-provenance,html:root .la-path{border-radius:var(--b-radius)}html:root body:has(.dp-hero) .rx-btn{border-radius:var(--b-radius-pill)}html:root .bk-filters__h{font-weight:700}html:root .la .la-sec__title,html:root .la .lb-pp .la-sec__title{font-size:var(--dh-h3-section)}html:root body:has(.dh-hero) .hub-main .hub-h2{font-size:var(--dh-h2)}html body .hub-footer .dh-tes a{text-decoration:underline}html:root .pg.qb{background:var(--dh-ground)}html:root .pg:has(.dh-hero){background:var(--dh-ground)}html:root .rx-ledger:has(.dp-page){background:var(--dh-ground);padding-bottom:0}html:root .pg.qb .qb-card,html:root .pg.qb .bk-filters,html body .lh-book .lh-continue--empty{background:var(--dh-card)}@media (pointer:coarse){html body .dh-tes>a,html body .ds-quiet,html body .ds-link{padding-block:var(--space-3)}}.ta{--ta-hue:#9fb4cc;--ta-strength:34%;--ta-ground:color-mix(in srgb, var(--ta-hue) var(--ta-strength), var(--page,#fff));--ta-hue-1:color-mix(in oklab, var(--ta-hue) 80%, #fff);--ta-hue-2:color-mix(in oklab, var(--ta-hue) 78%, #000);isolation:isolate;aspect-ratio:1;place-items:center;width:100%;display:grid;position:relative}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .ta{--ta-strength:16%}}:root[data-theme=dark] .ta,[data-theme=dark] .ta{--ta-strength:16%}.ta--glassware{--ta-hue:#9fb4cc}.ta--quickfire{--ta-hue:#ff9b85}.ta--questionBank{--ta-hue:#6cc7bd}.ta--labBook{--ta-hue:#e9cf98}.ta--plans{--ta-hue:#b7a3ec}.ta--success{--ta-hue:#f2c14e}.ta--empty,.ta--lost{--ta-hue:#bfc7d4}.ta--help,.ta--search{--ta-hue:#a9c1ea}.ta--progress{--ta-hue:#a8d5a0}.ta--biology{--ta-hue:var(--art-leaf-1)}.ta--chemistry{--ta-hue:var(--art-liquid-1)}.ta--physics{--ta-hue:var(--art-orb-1)}.ta[data-tone=biology]{--ta-hue:var(--art-leaf-1)}.ta[data-tone=chemistry]{--ta-hue:var(--art-liquid-1)}.ta[data-tone=physics]{--ta-hue:var(--art-orb-1)}.ta>*{grid-area:1/1}.ta__ground{aspect-ratio:1;z-index:-2;background:radial-gradient(circle at 38% 32%, color-mix(in srgb, var(--ta-ground) 55%, var(--page,#fff)), var(--ta-ground) 70%);border-radius:50%;width:86%}.ta__shadow{z-index:-1;background:rgb(var(--shadow-color,15 23 42) / .12);filter:blur(3px);border-radius:50%;align-self:end;width:54%;height:5%;margin-bottom:15%}.ta__obj,.ta__img{width:76%;height:auto;display:block;overflow:visible}.ta__img{object-fit:contain;width:80%}.ta--sm{width:120px}.ta--img .ta__shadow{display:none}.ta--img .ta__ground{opacity:0}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .ta--img .ta__ground{opacity:.92;background:radial-gradient(circle at 38% 32%, #f4f6fb, color-mix(in srgb, var(--ta-hue) 22%, #dfe5f0) 72%)}}:root[data-theme=dark] .ta--img .ta__ground,[data-theme=dark] .ta--img .ta__ground{opacity:.92;background:radial-gradient(circle at 38% 32%, #f4f6fb, color-mix(in srgb, var(--ta-hue) 22%, #dfe5f0) 72%)}.ta--back{aspect-ratio:auto}.ta--back>:not(.ta__glow){width:100%;min-width:0;position:relative}.ta__glow{inset:calc(var(--space-6,32px) * -1);z-index:-2;pointer-events:none;background:radial-gradient(ellipse 50% 50% at 50% var(--ta-cy,50%), var(--ta-ground), color-mix(in srgb, var(--ta-ground) 40%, transparent) 62%, transparent);position:absolute}@media (max-width:719.98px){.ta__glow{inset:calc(var(--space-5,24px) * -1) 0}}@media (forced-colors:active){.ta__ground,.ta__glow,.ta__shadow{display:none}.ta__obj{forced-color-adjust:none}}.ds-page{background:var(--dh-ground);color:var(--dh-card-ink);font-family:var(--b-font)}.ds-hero__in{z-index:1;grid-template-columns:minmax(0,1fr);align-items:center;gap:max(24px,min(3vw,56px));display:grid;position:relative}.ds-hero--tall .ds-hero__in{min-height:clamp(420px, calc(72vh - var(--dh-bar-h)), 640px);padding-top:max(56px,min(8vh,88px));padding-bottom:max(40px,min(6vh,72px))}.ds-hero--compact .ds-hero__in{min-height:max(220px,min(34vh,340px));padding-top:max(56px,min(8vh,80px));padding-bottom:max(32px,min(5vh,56px))}html:root .ds-hero--text .ds-hero__in{min-height:0;padding-block:clamp(40px, 6vh, 56px) calc(var(--dh-sheet-radius) + clamp(16px, 3vh, 24px))}html:root .ds-hero--text .dh-h1{font-size:var(--dh-h1-sub)}.ds-hero--text .dh-h1__line{display:inline}.ds-hero--text .ds-hero__lede{font-size:var(--b-text);margin-top:8px}.ds-hero__in--stage{grid-template-columns:minmax(0,6fr) minmax(0,7fr)}.ds-hero--tall .ds-hero__in--stage .dh-h1{font-size:max(2.5rem,min(min(4.2vw,8vh),4.25rem))}.ds-hero--compact .ds-hero__in--stage{grid-template-columns:minmax(0,1fr) auto}.ds-hero--compact .dh-h1{font-size:max(2.25rem,min(min(3.6vw,7vh),3.5rem))}.ds-hero__copy{min-width:0}.ds-hero__crumbs{margin-bottom:16px}.ds-hero__crumbs .bp-crumbs ol,.ds-hero__crumbs .bp-crumbs a,.ds-hero__crumbs .bp-crumbs__link,.ds-hero__crumbs .bp-crumbs [aria-current]{color:var(--dh-on-dark-2)}.ds-hero__crumbs :focus-visible{box-shadow:var(--focus-dh);outline:0}.ds-eyebrow{color:var(--dh-on-dark-2);font-size:var(--b-text-sm);letter-spacing:.01em;margin:0 0 12px;font-weight:600}.ds-hero__lede{max-width:38rem;color:var(--dh-on-dark);font-size:clamp(var(--b-text), .9rem + .35vw, 1.25rem);margin:max(14px,min(2vh,22px)) 0 0;line-height:1.5}.ds-actions{flex-wrap:wrap;align-items:center;gap:12px 28px;margin-top:max(20px,min(3vh,32px));display:flex}.ds-hero__note{color:var(--dh-on-dark-2);font-size:var(--b-text-sm);margin:12px 0 0}.ds-quiet{color:var(--dh-on-dark);text-decoration:underline;-webkit-text-decoration-color:var(--dh-on-dark-3);text-decoration-color:var(--dh-on-dark-3);text-underline-offset:4px;font-weight:600}.ds-quiet:hover{color:var(--dh-on-dark);-webkit-text-decoration-color:var(--dh-lime);text-decoration-color:var(--dh-lime)}.ds-quiet:focus-visible{box-shadow:var(--focus-dh);border-radius:4px;outline:0}.ds-lines{z-index:0;width:100%;height:100%;color:var(--dh-line-on-dark);pointer-events:none;position:absolute;top:0;bottom:0;left:0;right:0}.ds-hero__stage{min-width:0}.ds-hero__object{width:max(120px,min(14vw,200px));height:auto}.ds-cap{color:var(--dh-on-dark-2);font-size:var(--b-text-xs);text-align:right;margin-top:12px}.ds-projector__screen{border:1px solid var(--dh-glass-line);background:var(--dh-screen);box-shadow:var(--elev-dh-device);aspect-ratio:16/10;border-radius:10px;overflow:hidden}.ds-projector__screen picture{display:contents}.ds-projector__screen img{object-fit:cover;width:100%;height:100%;display:block}.ds-band{padding-top:max(48px,min(7vh,88px));padding-bottom:0}.ds-band--tight{padding-top:max(40px,min(6vh,72px))}.ds-band:last-child{padding-bottom:max(48px,min(7vh,88px))}.ds-band:has(+.dh-cta){padding-bottom:max(48px,min(7vh,88px))}.ds-band:has(+.dh-loop){padding-bottom:max(48px,min(7vh,88px))}.ds-head{max-width:44rem;margin-bottom:max(20px,min(3vh,32px))}.ds-h2{color:var(--dh-card-ink);font:700 var(--dh-h2) / 1.12 var(--b-font);letter-spacing:-.025em;margin:0}.ds-h3{color:var(--dh-card-ink);font:700 var(--dh-h3) / 1.2 var(--b-font);letter-spacing:-.015em;margin:0}.ds-lede{color:var(--dh-card-ink-2);font-size:var(--b-text-lg);margin:10px 0 0;line-height:1.5}.ds-after{color:var(--dh-card-ink-2);margin:24px 0 0}.ds-link,.ds-after a,.ds-article a,.ds-answer__a a,.ds-why a{color:var(--dh-blue-ink);text-underline-offset:2px;font-weight:600;text-decoration:underline}.ds-link:hover,.ds-after a:hover,.ds-article a:hover,.ds-answer__a a:hover{color:var(--dh-card-ink)}.ds-page a:focus-visible{box-shadow:var(--focus-dh-card);border-radius:4px;outline:0}.ds-page summary:focus-visible{box-shadow:var(--focus-dh-card);border-radius:4px;outline:0}.ds-page button:focus-visible{box-shadow:var(--focus-dh-card);border-radius:4px;outline:0}.ds-page select:focus-visible{box-shadow:var(--focus-dh-card);border-radius:4px;outline:0}.ds-page input:focus-visible{box-shadow:var(--focus-dh-card);border-radius:4px;outline:0}.ds-page .dh-hero a:focus-visible{box-shadow:var(--focus-dh)}.ds-page .dh-cta a:focus-visible{box-shadow:var(--focus-dh)}.ds-page .ds-stages a:focus-visible{box-shadow:var(--focus-dh)}.ds-page .dh-loop a:focus-visible{box-shadow:var(--focus-dh)}.ds-offer__pic--tall,.ds-offer__pic--wide{width:auto;height:100%}.ds-sheets{grid-template-columns:repeat(4,minmax(0,1fr));gap:max(16px,min(2vw,28px));margin:0;padding:0;list-style:none;display:grid}.ds-sheets__a{color:var(--dh-card-ink);gap:8px;text-decoration:none;display:grid}.ds-sheet{box-sizing:border-box;border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-wash-blue);width:100%;height:auto;transition:transform var(--b-dur) var(--b-ease), box-shadow var(--b-dur) var(--b-ease);margin-bottom:8px;padding:max(16px,min(2vw,28px)) max(28px,min(4vw,56px));display:block}.ds-sheets__item:nth-child(2) .ds-sheet{background:var(--dh-wash-teal)}.ds-sheets__item:nth-child(3) .ds-sheet{background:var(--dh-wash-purple)}.ds-sheets__a:hover .ds-sheet{box-shadow:var(--elev-dh-card);transform:translateY(-2px)}.ds-sheet__page{fill:var(--dh-card);stroke:var(--dh-card-line)}.ds-sheet__ink{fill:none;stroke:var(--dh-card-ink-2);stroke-width:1.5px;stroke-linecap:round;stroke-linejoin:round}.ds-sheet__plot{stroke:var(--dh-blue-ink);stroke-width:2px}.ds-sheets__t{font-size:var(--b-text-lg);font-weight:700;line-height:1.25}.ds-sheets__d{color:var(--dh-card-ink-2);font-size:var(--b-text-sm);line-height:1.5}.ds-tesline{border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);color:var(--dh-card-ink-2);flex-wrap:wrap;align-items:baseline;gap:8px 24px;margin-top:max(24px,min(3vh,36px));padding:18px 22px;display:flex}.ds-tesline__lead{color:var(--dh-card-ink);margin:0;font-weight:600}.ds-page .dh-tes a{color:var(--dh-blue-ink)}.ds-page .dh-tes__note{color:var(--dh-card-ink-2)}.ds-worlds{grid-template-columns:repeat(3,minmax(0,1fr));gap:max(14px,min(1.6vw,24px));margin:0;padding:0;list-style:none;display:grid}.ds-world__a{border-radius:var(--b-radius);background:var(--dh-navy-800);box-shadow:var(--elev-dh-card);color:var(--dh-on-dark);aspect-ratio:16/9;transition:transform var(--b-dur) var(--b-ease), box-shadow var(--b-dur) var(--b-ease);text-decoration:none;display:block;position:relative;overflow:hidden}.ds-world__a:hover{color:var(--dh-on-dark);box-shadow:var(--elev-dh-card-lift);transform:translateY(-2px)}.ds-world__pic picture{display:contents}.ds-world__pic img{object-fit:cover;width:100%;height:100%;position:absolute;top:0;bottom:0;left:0;right:0}.ds-world__words{background:linear-gradient(to top, var(--dh-navy-950), transparent);align-items:baseline;gap:10px;padding:40px 18px 14px;display:flex;position:absolute;top:auto;bottom:0;left:0;right:0}.ds-world__t{font-size:var(--b-text-lg);font-weight:700}.ds-world__n{color:var(--dh-on-dark-2);font-size:var(--b-text-sm)}.ds-world__words .dh-arrow{align-self:center}.ds-world__words .dh-arrow:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:auto}.ds-world__words .dh-arrow:not(:-moz-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:auto}.ds-world__words .dh-arrow:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:auto}.ds-world__words .dh-arrow:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:auto}.ds-world__words .dh-arrow:-moz-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:auto}.ds-world__words .dh-arrow:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:auto}.ds-limits{border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:16px max(24px,min(4vw,64px));padding:max(22px,min(3vw,36px));display:grid}.ds-limits__head p{color:var(--dh-card-ink-2);margin:8px 0 0}.ds-limits__list{gap:10px;margin:0;padding-left:18px;line-height:1.55;display:grid}.ds-limits__more{color:var(--dh-card-ink-2);font-size:var(--b-text-sm);grid-column:2;margin:0;line-height:1.55}.ds-share{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:max(16px,min(2vw,28px));display:grid}.ds-share__form,.ds-share__pack{border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);box-shadow:var(--elev-dh-card);align-content:start;gap:10px;padding:max(20px,min(2.4vw,32px));display:grid}.ds-share__h{font-size:var(--b-text-lg);margin:0}.ds-share__pack p{color:var(--dh-card-ink-2);margin:0}.ds-label{color:var(--dh-card-ink);font-size:var(--b-text-sm);font-weight:600}.ds-select,.ds-copy__link{box-sizing:border-box;border:1px solid var(--dh-card-line);background:var(--dh-ground);width:100%;min-height:48px;color:var(--dh-card-ink);font:inherit;border-radius:10px;padding:0 14px}.ds-copy{gap:8px;display:flex}.ds-copy__link{flex:1;min-width:0}.ds-copy__btn{flex:none}.ds-status{min-height:1.3em;color:var(--dh-card-ink-2);font-size:var(--b-text-sm);margin:0}.ds-why{grid-template-columns:minmax(0,7fr) minmax(0,4fr);align-items:start;gap:max(24px,min(4vw,72px));display:grid}.ds-why__words p{max-width:40rem;color:var(--dh-card-ink-2);font-size:var(--b-text-lg);margin:16px 0 0;line-height:1.6}.ds-maker{border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);box-shadow:var(--elev-dh-card);gap:12px;padding:max(20px,min(2.4vw,32px));display:grid}.ds-maker p{color:var(--dh-card-ink-2);margin:0;line-height:1.5}.ds-maker__small{border-top:1px solid var(--dh-card-line);font-size:var(--b-text-xs);padding-top:12px}.ds-stages{background:var(--dh-band);color:var(--dh-on-dark);margin-top:max(48px,min(7vh,88px));padding-top:max(40px,min(6vh,72px));padding-bottom:max(40px,min(6vh,72px))}.ds-stages__head p{color:var(--dh-on-dark-2);font-size:var(--b-text-lg);margin:10px 0 0}.ds-stages__list{grid-template-columns:repeat(8,minmax(0,1fr));gap:12px;margin:max(24px,min(4vh,40px)) 0 0;padding:0;list-style:none;display:grid;position:relative}.ds-stages__list:before{content:"";top:16px;background:var(--dh-lime);opacity:.55;height:2px;position:absolute;left:6%;right:6%}.ds-stage{text-align:center;align-content:start;justify-items:center;gap:8px;display:grid;position:relative}.ds-stage__n{background:var(--dh-lime);width:34px;height:34px;color:var(--dh-on-lime);font-size:var(--b-text-sm);border-radius:50%;place-items:center;font-weight:700;display:grid;position:relative}.ds-stage__icon{color:var(--dh-on-dark);margin-top:6px}.ds-stage__t{font-size:var(--b-text)}.ds-stage__d{color:var(--dh-on-dark-2);font-size:var(--b-text-sm);line-height:1.4}.ds-facts{grid-template-columns:repeat(3,minmax(0,1fr));gap:max(14px,min(1.6vw,24px));margin:0;padding:0;list-style:none;display:grid}.ds-fact{border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);box-shadow:var(--elev-dh-card);padding:max(20px,min(2.2vw,28px))}.ds-fact__icon{border-radius:50%;place-items:center;width:48px;height:48px;display:grid}.ds-fact__icon--teal{background:var(--dh-wash-teal);color:var(--dh-teal-ink)}.ds-fact__icon--blue{background:var(--dh-wash-blue);color:var(--dh-blue-ink)}.ds-fact__icon--purple{background:var(--dh-wash-purple);color:var(--dh-purple-ink)}.ds-fact__t{font-size:var(--b-text-lg);margin:14px 0 6px}.ds-fact p{color:var(--dh-card-ink-2);margin:0;line-height:1.55}.ds-answers{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:10px max(14px,min(1.6vw,24px));display:grid}.ds-answer{border:1px solid var(--dh-card-line);background:var(--dh-card);border-radius:12px}.ds-answer summary{cursor:pointer;justify-content:space-between;align-items:center;gap:16px;min-height:52px;padding:10px 18px;font-weight:600;list-style:none;display:flex}.ds-answer summary::-webkit-details-marker{display:none}.ds-answer svg{fill:none;stroke:currentColor;stroke-width:1.6px;stroke-linecap:round;stroke-linejoin:round;transition:transform var(--b-dur) var(--b-ease);flex:none}.ds-answer[open] svg{transform:rotate(180deg)}.ds-answer__a{color:var(--dh-card-ink-2);padding:0 18px 14px;line-height:1.6}.ds-answer__a p{margin:0 0 8px}.ds-read{grid-template-columns:minmax(180px,240px) minmax(0,44rem);gap:max(32px,min(6vw,96px));padding-top:max(36px,min(6vh,64px));padding-bottom:max(56px,min(9vh,96px));display:grid}.ds-toc{top:calc(var(--dh-bar-h) + 24px);align-self:start;position:-webkit-sticky;position:sticky}.ds-toc__h{color:var(--dh-card-ink-2);font-size:var(--b-text-xs);margin:0 0 8px;font-weight:600}.ds-toc ul{border-left:2px solid var(--dh-card-line);gap:2px;margin:0;padding:0 0 0 12px;list-style:none;display:grid}.ds-toc a{color:var(--dh-card-ink-2);font-size:var(--b-text-sm);padding:5px 0;line-height:1.35;text-decoration:none;display:block}.ds-toc a:hover{color:var(--dh-card-ink);text-underline-offset:2px;text-decoration:underline}.ds-article{min-width:0;color:var(--dh-card-ink);font-size:var(--b-text);line-height:1.65}.ds-article--solo{grid-column:1/-1;max-width:44rem}.ds-sec{border-top:1px solid var(--dh-card-line);scroll-margin-top:calc(var(--dh-bar-h) + 16px);padding-top:22px;padding-bottom:22px}.ds-sec:first-of-type{border-top:0;padding-top:0}.ds-sec__h{color:var(--dh-card-ink);font:700 var(--dh-h3) / 1.25 var(--b-font);letter-spacing:-.012em;scroll-margin-top:calc(var(--dh-bar-h) + 16px);margin:0 0 10px}.ds-article p{margin:0 0 12px}.ds-article ul,.ds-article ol{gap:8px;margin:0 0 12px;padding-left:22px;display:grid}.ds-faq__body{padding-top:max(36px,min(6vh,64px));padding-bottom:max(56px,min(9vh,96px))}.ds-faq .faq{grid-template-columns:minmax(180px,240px) minmax(0,52rem);align-items:start;gap:0 max(32px,min(6vw,96px));display:grid}.ds-faq .faq__jump{top:calc(var(--dh-bar-h) + 24px);background:0 0;border:0;grid-area:1/1/span 12;margin:0;padding:0;position:-webkit-sticky;position:sticky}.ds-faq .faq__jump ul{border-left:2px solid var(--dh-card-line);gap:2px;margin:0;padding:0 0 0 12px;list-style:none;display:grid}.ds-faq .faq__jump a{color:var(--dh-card-ink-2);font-size:var(--b-text-sm);background:0 0;border:0;padding:5px 0;line-height:1.35;text-decoration:none;display:block}.ds-faq .faq__jump a:hover{color:var(--dh-card-ink);text-underline-offset:2px;text-decoration:underline}.ds-faq .faq__group{scroll-margin-top:calc(var(--dh-bar-h) + 16px);grid-column:2;margin:0 0 32px}.ds-faq .faq__title{color:var(--dh-card-ink);font:700 var(--dh-h3) / 1.25 var(--b-font);letter-spacing:-.012em;scroll-margin-top:calc(var(--dh-bar-h) + 16px);margin:0 0 12px}.ds-faq .faq__list{background:0 0;border:0;gap:10px;display:grid}.ds-faq .faq__item{border:1px solid var(--dh-card-line);background:var(--dh-card);scroll-margin-top:calc(var(--dh-bar-h) + 16px);border-radius:12px}.ds-faq .faq__q{min-height:52px;color:var(--dh-card-ink);padding:10px 18px;font-weight:600}.ds-faq .faq__a{padding:0 18px 14px}.ds-faq .faq__a,.ds-faq .faq__a p{color:var(--dh-card-ink-2);line-height:1.65}.ds-faq .faq__a a,.ds-faq .faq__inline{color:var(--dh-blue-ink)}.ds-faq .faq__chev{color:var(--dh-card-ink-2)}.ds-faq__tes{border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);max-width:52rem;padding:max(20px,min(2.4vw,28px))}.ds-faq__tes:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:calc(min(240px,20vw) + max(32px,min(6vw,96px)))}.ds-faq__tes:not(:-moz-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:calc(min(240px,20vw) + max(32px,min(6vw,96px)))}.ds-faq__tes:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:calc(min(240px,20vw) + max(32px,min(6vw,96px)))}.ds-faq__tes:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:calc(min(240px,20vw) + max(32px,min(6vw,96px)))}.ds-faq__tes:-moz-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:calc(min(240px,20vw) + max(32px,min(6vw,96px)))}.ds-faq__tes:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:calc(min(240px,20vw) + max(32px,min(6vw,96px)))}.ds-faq__tes .sp-tes{color:var(--dh-card-ink-2);background:0 0;border:0;margin:0;padding:0}.ds-faq__tes .sp-tes__title{color:var(--dh-card-ink);font:700 var(--dh-h3) / 1.25 var(--b-font)}.ds-faq__body>.ds-after:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:calc(min(240px,20vw) + max(32px,min(6vw,96px)))}.ds-faq__body>.ds-after:not(:-moz-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:calc(min(240px,20vw) + max(32px,min(6vw,96px)))}.ds-faq__body>.ds-after:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:calc(min(240px,20vw) + max(32px,min(6vw,96px)))}.ds-faq__body>.ds-after:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:calc(min(240px,20vw) + max(32px,min(6vw,96px)))}.ds-faq__body>.ds-after:-moz-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:calc(min(240px,20vw) + max(32px,min(6vw,96px)))}.ds-faq__body>.ds-after:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:calc(min(240px,20vw) + max(32px,min(6vw,96px)))}.ds-spill{width:min(100%,520px);height:auto;margin-left:auto;margin-right:auto;display:block}.ds-spill__glow{fill:var(--dh-glow);opacity:.35}.ds-spill__puddle,.ds-spill__liquid{fill:var(--dh-lime);opacity:.85}.ds-spill__glass{fill:none;stroke:var(--dh-on-dark);stroke-width:2.5px;stroke-linejoin:round;stroke-linecap:round}.ds-spill__mark{fill:none;stroke:var(--dh-on-dark-2);stroke-width:1.5px;stroke-linecap:round}.ds-places{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:max(12px,min(1.4vw,20px));margin:0;padding:0;list-style:none;display:grid}.ds-places__a{box-sizing:border-box;border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);height:100%;box-shadow:var(--elev-dh-card);color:var(--dh-card-ink);transition:transform var(--b-dur) var(--b-ease), box-shadow var(--b-dur) var(--b-ease);align-content:start;gap:6px;padding:18px 20px;text-decoration:none;display:grid}.ds-places__a:hover{box-shadow:var(--elev-dh-card-lift);transform:translateY(-2px)}.ds-places__t{justify-content:space-between;align-items:center;gap:10px;font-weight:700;display:flex}.ds-places__t .dh-arrow{color:var(--dh-blue-ink)}.ds-places__d{color:var(--dh-card-ink-2);font-size:var(--b-text-sm);line-height:1.45}.ds-popular{margin-top:max(28px,min(4vh,44px))}.ds-popular ul{flex-wrap:wrap;gap:8px 12px;margin:12px 0 0;padding:0;list-style:none;display:flex}.ds-popular a{border:1px solid var(--dh-card-line);border-radius:var(--b-radius-pill);background:var(--dh-card);min-height:40px;color:var(--dh-card-ink);font-size:var(--b-text-sm);align-items:center;padding:0 16px;font-weight:600;text-decoration:none;display:inline-flex}.ds-popular a:hover{border-color:var(--dh-blue-ink)}@media (max-width:999.98px){.ds-hero__in--stage,.ds-hero--compact .ds-hero__in--stage{grid-template-columns:minmax(0,1fr)}.ds-hero--compact .ds-hero__stage{display:none}.ds-sheets{grid-template-columns:repeat(2,minmax(0,1fr))}.ds-worlds,.ds-answers,.ds-facts,.ds-why,.ds-share,.ds-limits{grid-template-columns:minmax(0,1fr)}.ds-limits__more{grid-column:1}.ds-stages__list{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 12px}.ds-stages__list:before{display:none}.ds-read,.ds-faq .faq{grid-template-columns:minmax(0,1fr)}.ds-toc,.ds-faq .faq__jump{grid-area:auto/1;margin-bottom:8px;position:static}.ds-faq .faq__group{grid-column:1}.ds-faq__tes:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:0}.ds-faq__tes:not(:-moz-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:0}.ds-faq__tes:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:0}.ds-faq__body>.ds-after:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:0}.ds-faq__body>.ds-after:not(:-moz-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:0}.ds-faq__body>.ds-after:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){margin-left:0}.ds-faq__tes:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:0}.ds-faq__tes:-moz-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:0}.ds-faq__tes:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:0}.ds-faq__body>.ds-after:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:0}.ds-faq__body>.ds-after:-moz-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:0}.ds-faq__body>.ds-after:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){margin-right:0}}@media (max-width:560px){.ds-sheet{padding:14px 24px}.ds-sheets__d{font-size:var(--b-text-xs)}.ds-copy{flex-direction:column}.ds-world__a{aspect-ratio:2}}@media (prefers-reduced-motion:reduce){.ds-sheet,.ds-world__a,.ds-places__a,.ds-answer svg{transition:none}.ds-sheets__a:hover .ds-sheet,.ds-world__a:hover,.ds-places__a:hover{transform:none}}:root[data-reduced-motion=true] .ds-sheet,:root[data-reduced-motion=true] .ds-world__a,:root[data-reduced-motion=true] .ds-places__a,:root[data-reduced-motion=true] .ds-answer svg{transition:none;transform:none}@media print{.ds-hero .dh-art,.ds-lines,.ds-toc{display:none}.ds-read{display:block}}.ds-tour{--font-data:var(--b-font);--font-display:var(--b-font);padding-bottom:max(32px,min(5vh,56px))}.ds-tour .hf-section{background:0 0;padding-top:max(56px,min(8vh,80px))}html body .ds-tour .hf-kicker,html body .ds-tour .hf-tour__len,html body .ds-tour .hf-lede{color:var(--dh-on-dark-2)}html body .ds-tour .hf-h2{color:var(--dh-on-dark);font:700 var(--dh-h1-sub) / 1.08 var(--b-font);letter-spacing:-.03em}.ds-tour .hf-player{box-shadow:var(--elev-dh-device)}.ds-tour .hf-map,.ds-tour .hf-transcript{border-radius:var(--b-radius);background:var(--dh-card);padding:max(16px,min(2vw,28px))}.ds-tour .hf-map{margin-top:max(20px,min(3vh,32px))}.ds-tour .hf-transcript{margin-top:12px}.ds-tour .hf-wrap{box-sizing:border-box;width:min(100%,1360px);max-width:none;margin-left:auto;margin-right:auto;padding-left:max(16px,min(4.4vw,64px));padding-right:max(16px,min(4.4vw,64px))}html:root body:has(.ds-tour) .ap-rail{background:var(--dh-navy-900);-webkit-backdrop-filter:none;backdrop-filter:none}html:root body:has(.ds-tour) .ap-top{background:var(--dh-navy-900);-webkit-backdrop-filter:none;backdrop-filter:none}.hub-main:has(>.ds-page){max-width:none;padding:0}body:has(.ds-hero){background:var(--dh-ground)}body:has(.ds-hero) .hub-crumbs{z-index:3;left:0;right:0;top:var(--dh-bar-h);box-sizing:border-box;width:min(100%,1360px);max-width:none;padding-left:max(16px,min(4.4vw,64px));padding-right:max(16px,min(4.4vw,64px));position:absolute}body:has(.ds-hero) .hub-crumbs ol{color:var(--dh-on-dark-2);padding-top:14px}html body:has(.ds-hero) .hub-crumbs a{color:var(--dh-on-dark-2)}html body:has(.ds-hero) .hub-crumbs a:hover{color:var(--dh-on-dark)}html body:has(.ds-hero) .hub-crumbs a:focus-visible{box-shadow:var(--focus-dh);outline:0}body:has(.ds-hero) .hub-crumbs li+li:before{color:var(--dh-on-dark-3)}html body:has(.ds-hero) .hub-crumbs [aria-current]{color:var(--dh-on-dark-2)}html body:has(.dh-hero) .sw-foot a.hub-btn--primary{color:var(--dh-on-dark)}html body:has(.dh-hero) .sw-foot a.hub-btn--primary:hover{color:var(--dh-on-dark)}body:has(.ds-hero) .hub-footer{margin-top:0}.ds-shelves,.ds-tool,.ds-ap{padding-top:max(24px,min(4vh,48px));padding-bottom:max(56px,min(9vh,96px))}.ds-tool .hub-sheet{max-width:46.25rem;margin-left:auto;margin-right:auto}.ds-shelves .hub-h2{color:var(--dh-card-ink)}.ds-board .ds-actions .hub-chips{margin:0}html body .ds-hero .hub-chips ul{gap:8px}html body .ds-hero .hub-chips a{border-color:var(--dh-line-on-dark);border-radius:var(--b-radius-pill);color:var(--dh-on-dark);background:0 0}html body .ds-hero .hub-chips a:hover{border-color:var(--dh-on-dark-2);color:var(--dh-on-dark)}html body .ds-hero .hub-chips a[aria-current=page]{border-color:var(--dh-on-dark);background:var(--dh-on-dark);color:var(--dh-navy-900)}.ds-board__body,.sh-subject-body{padding-top:max(32px,min(5vh,48px));padding-bottom:max(56px,min(9vh,96px))}.ds-board__body .hub-groups,.sh-subject-body .hub-groups{gap:16px;margin:0}.ds-board__body .hub-group,.sh-subject-body .hub-group{border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);box-shadow:var(--elev-dh-card);padding:24px}.ds-board__body .hub-group__h,.sh-subject-body .hub-group__h{color:var(--dh-card-ink);font:700 var(--b-text-lg) / 1.3 var(--b-font);letter-spacing:0;text-transform:none}.ds-board__body .hub-plist__t,.sh-subject-body .hub-plist__t{color:var(--dh-card-ink)}.ds-board__body .hub-plist__n,.ds-board__body .hub-plist__m,.sh-subject-body .hub-plist__n,.sh-subject-body .hub-plist__m{color:var(--dh-card-ink-2);font-family:var(--b-font)}.ds-board__body .hub-band{border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);margin-top:32px;padding:24px}.ds-board__body .hub-band .hub-h3{color:var(--dh-card-ink)}.sh-subject-home{padding-bottom:0}.sh-subject-home .sh-subject-opening{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start;gap:32px;padding:0 0 32px}.sh-subject-home .sh-subject-preview{border-color:var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);box-shadow:var(--elev-dh-card)}.sh-subject-home .sh-subject-preview__label,.sh-subject-home .sh-subject-preview figcaption p{color:var(--dh-card-ink-2);font-size:var(--b-text-sm)}.sh-subject-home .sh-subject-preview figcaption h2{font:700 var(--b-h3) / 1.25 var(--b-font);letter-spacing:-.02em}html body .sh-subject-home .sh-subject-preview a{border-radius:var(--b-radius-pill);background:var(--dh-blue);color:var(--dh-on-dark);font:700 var(--b-text-sm) / 1.2 var(--b-font)}html body .sh-subject-home .sh-subject-preview a:hover{background:var(--dh-blue-hover)}.sh-subject-home .sh-subject-activities{border-top:0;padding:0;display:block}.sh-subject-home .sh-subject-activities>h2{color:var(--dh-card-ink);font:700 var(--b-h3) / 1.25 var(--b-font);letter-spacing:-.02em;margin-bottom:16px}.sh-subject-home .sh-subject-activities dl{grid-template-columns:minmax(0,1fr);gap:12px}.sh-subject-home .sh-subject-activities dl>div{border:1px solid var(--dh-card-line);border-radius:var(--b-radius-md);background:var(--dh-card);padding:16px 24px}.sh-subject-home .sh-subject-activities dt{color:var(--dh-card-ink);font:700 var(--b-text) / 1.3 var(--b-font)}.sh-subject-home .sh-subject-activities dd,.sh-subject-home .sh-subject-scope{color:var(--dh-card-ink-2);font-size:var(--b-text-sm);line-height:1.5}.sh-subject-home .sh-subject-guides{border-color:var(--dh-card-line)}.sh-subject-home .sh-subject-guides>summary{color:var(--dh-card-ink);font:700 var(--b-text) / 1.4 var(--b-font)}@media (max-width:800px){.sh-subject-home .sh-subject-opening{grid-template-columns:minmax(0,1fr)}}html body .ds-hero .hub-chips a{align-items:center;min-height:44px;padding:8px 24px;font-weight:600;text-decoration:none;display:inline-flex}html body .ds-hero .hub-chips a:focus-visible{box-shadow:var(--focus-dh);outline:0}html body .sh-subject-home,html body .sh-subject-home .sh-subject-opening{background:0 0}.sh-subject-home .ds-hero__object{width:min(100%,22rem)}html body .sh-subject-home .sh-subject-opening:before{display:none}.pg-sheet{z-index:1;margin-top:calc(var(--dh-sheet-radius) * -1);border-radius:var(--dh-sheet-radius) var(--dh-sheet-radius) 0 0;background:var(--dh-ground);position:relative}.pg-page .dh-strip{padding-bottom:var(--dh-sheet-radius)}.pg-sheet>.dh-offers{background:0 0;padding-top:max(32px,min(5vh,56px));padding-bottom:0}.pg-page .ds-hero__stage .dh-laptop{width:100%}.pg-device{margin:0}.pg-device .ds-cap{margin-top:16px}.pg-frame,.pg-specimen{margin:0}.pg-frame__screen{border:1px solid var(--dh-card-line);border-radius:var(--b-radius-md);background:var(--dh-card);box-shadow:var(--elev-dh-card-lift);display:block;overflow:hidden}.pg-frame__screen picture{display:contents}.pg-frame__screen img{width:100%;height:auto;display:block}.pg-frame__cap{color:var(--dh-card-ink-2);font-size:var(--b-text-sm);margin-top:12px;line-height:1.45}.pg-features{gap:max(48px,min(8vh,96px));padding-top:max(56px,min(9vh,104px));padding-bottom:max(56px,min(9vh,104px));display:grid}.pg-feature{grid-template-columns:minmax(0,5fr) minmax(0,7fr);align-items:center;gap:max(24px,min(4vw,72px));display:grid}.pg-feature--flip{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}.pg-feature--flip .pg-feature__words{order:2}.pg-feature__h{font-size:var(--dh-h2);letter-spacing:-.025em;line-height:1.12}.pg-feature__words>p{margin:16px 0 0}.pg-feature__p{color:var(--dh-card-ink-2);font-size:var(--b-text-lg);line-height:1.5}.pg-chips{flex-wrap:wrap;gap:8px;margin:20px 0 0;padding:0;list-style:none;display:flex}.pg-chips li{border:1px solid var(--dh-card-line);border-radius:var(--b-radius-pill);background:var(--dh-card);color:var(--dh-card-ink-2);font-size:var(--b-text-sm);padding:8px 12px}.pg-chips strong{color:var(--dh-card-ink);font-family:var(--b-font-num)}.pg-ticks{gap:10px;margin:20px 0 0;padding:0;list-style:none;display:grid}.pg-ticks li{padding-left:28px;line-height:1.45;position:relative}.pg-ticks li:before{content:"";border-bottom:2px solid var(--dh-teal-ink);border-left:2px solid var(--dh-teal-ink);width:14px;height:7px;position:absolute;top:.32em;left:2px;transform:rotate(-45deg)translate(1px)}.pg-page .hp-card{max-height:none;display:block;overflow:visible;-webkit-mask-image:none;mask-image:none}.pg-specimen .hub-card{box-shadow:var(--elev-dh-card-lift);margin:0}.pg-band{background:var(--dh-band);color:var(--dh-on-dark);padding-top:max(48px,min(8vh,88px));padding-bottom:max(48px,min(8vh,88px))}.pg-band__head{max-width:44rem;margin-bottom:max(24px,min(4vh,40px))}.pg-band__lede{color:var(--dh-on-dark-2);font-size:var(--b-text-lg);margin:12px 0 0;line-height:1.5}.pg-paper{border-radius:var(--b-radius);background:var(--dh-card);color:var(--dh-card-ink);box-shadow:var(--elev-dh-device);padding:max(16px,min(2.4vw,36px))}.pg-paper .hx-fig{background:0 0;border:0;margin:0;padding:0}.pg-worlds .ds-world__a{aspect-ratio:21/9}.pg-benches{grid-template-columns:repeat(3,minmax(0,1fr));gap:max(14px,min(1.6vw,24px));margin:max(14px,min(1.6vw,24px)) 0 0;padding:0;list-style:none;display:grid}.pg-bench__a{box-sizing:border-box;border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);height:100%;box-shadow:var(--elev-dh-card);color:var(--dh-card-ink);transition:transform var(--b-dur) var(--b-ease), box-shadow var(--b-dur) var(--b-ease);grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:6px 12px;padding-bottom:16px;text-decoration:none;display:grid;position:relative;overflow:hidden}.pg-bench__a:hover{color:var(--dh-card-ink);box-shadow:var(--elev-dh-card-lift);transform:translateY(-2px)}.pg-bench__pic{aspect-ratio:16/10;background:var(--dh-wash-blue);grid-column:1/-1;margin-bottom:8px;display:block;overflow:hidden}.pg-bench__pic picture{display:contents}.pg-bench__pic img{object-fit:cover;width:100%;height:100%;display:block}.pg-bench__a>.pg-pill{position:absolute;top:12px;left:12px}.pg-bench__words{gap:4px;padding-left:16px;display:grid}.pg-bench__t{font-size:var(--b-text-lg);letter-spacing:-.01em;font-weight:700;line-height:1.2}.pg-bench__d{color:var(--dh-card-ink-2);font-size:var(--b-text-sm);line-height:1.45}.pg-bench__a>.dh-arrow{color:var(--dh-blue-ink);margin-right:16px}.pg-pill{border-radius:var(--b-radius-pill);font-size:var(--b-text-xs);padding:4px 12px;font-weight:700;line-height:1.4;display:inline-block}.pg-pill[data-subject=biology]{background:var(--dh-wash-teal);color:var(--dh-teal-ink)}.pg-pill[data-subject=chemistry]{background:var(--dh-wash-blue);color:var(--dh-blue-ink)}.pg-pill[data-subject=physics]{background:var(--dh-wash-purple);color:var(--dh-purple-ink)}.pg-all{margin:max(20px,min(3vh,32px)) 0 0}.pg-sheet>.ds-band:last-child{padding-bottom:max(48px,min(7vh,88px))}.pg-page .ds-band:has(+.pg-band){padding-bottom:max(48px,min(7vh,88px))}.pg-steps{grid-template-columns:repeat(9,minmax(0,1fr));gap:12px;margin:0;padding:0;list-style:none;display:grid}.pg-steps__item{align-content:start;justify-items:start;gap:12px;display:grid;position:relative}.pg-steps__item:not(:last-child):after{content:"";border-top:1px solid var(--dh-line-on-dark);position:absolute;top:20px;left:48px;right:-6px}.pg-steps__n{background:var(--dh-on-dark);width:40px;height:40px;color:var(--dh-navy-900);border-radius:50%;place-items:center;font-weight:700;display:grid}.pg-steps__t{font-weight:600;line-height:1.3}.pg-courses{grid-template-columns:repeat(2,minmax(0,1fr));gap:max(14px,min(1.6vw,24px));margin:0;padding:0;list-style:none;display:grid}.pg-course{box-sizing:border-box;border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);height:100%;box-shadow:var(--elev-dh-card);color:var(--dh-card-ink);transition:transform var(--b-dur) var(--b-ease), box-shadow var(--b-dur) var(--b-ease);grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:20px;padding:max(18px,min(2vw,28px));text-decoration:none;display:grid}.pg-course:hover{color:var(--dh-card-ink);box-shadow:var(--elev-dh-card-lift);transform:translateY(-2px)}.pg-course__n{font:700 var(--dh-h2) / 1 var(--b-font);letter-spacing:-.03em}.pg-course__words{gap:4px;display:grid}.pg-course__t{font-weight:700}.pg-course__d{color:var(--dh-card-ink-2);font-size:var(--b-text-sm);line-height:1.45}.pg-course .dh-arrow{color:var(--dh-blue-ink)}.pg-part{padding-top:max(48px,min(8vh,88px));padding-bottom:0}.pg-part--first{padding-top:max(40px,min(6vh,72px))}.pg-part--measure{padding-bottom:max(48px,min(8vh,88px))}.pg-sheet>.pg-part:last-child{padding-bottom:0}html body .pg-page .hx-h2,html body .pg-page .hx-show__h{color:var(--dh-card-ink);font:700 var(--dh-h2) / 1.12 var(--b-font);letter-spacing:-.025em}html body .pg-page .hx-show__part--measure .hx-show__h,html body .pg-page .hx-show__part--question .hx-show__h,html body .pg-page .hx-show__part--paper .hx-show__h{font-size:var(--dh-h3);line-height:1.2}.pg-page .hx-loop,.pg-page .hx-show{border:0;margin:0;padding-top:0;padding-bottom:0}.pg-page .hx-loop__k,.pg-page .hx-show .hx-loop__k,.pg-page .hx-show__more a{color:var(--dh-blue-ink)}.pg-after{color:var(--dh-card-ink-2);margin:max(16px,min(2vh,24px)) 0 0;line-height:1.55}.pg-after strong{color:var(--dh-card-ink)}.pg-purposes{grid-template-columns:repeat(5,minmax(0,1fr));gap:max(12px,min(1.2vw,16px));margin:0;padding:0;list-style:none;display:grid}.pg-purpose{border:1px solid var(--dh-card-line);border-radius:var(--b-radius-md);background:var(--dh-card);box-shadow:var(--elev-dh-card);padding:max(16px,min(1.6vw,22px))}.pg-purpose__n{background:var(--dh-wash-blue);width:32px;height:32px;color:var(--dh-blue-ink);border-radius:50%;place-items:center;font-weight:700;display:grid}.pg-purpose__t{color:var(--dh-card-ink);font-size:var(--b-text);margin:12px 0 4px;font-weight:700;line-height:1.25}.pg-purpose__d{color:var(--dh-card-ink-2);font-size:var(--b-text-sm);margin:0;line-height:1.45}.pg-tables{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:max(14px,min(1.6vw,24px));display:grid}.pg-table{border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);min-width:0;box-shadow:var(--elev-dh-card);padding:max(14px,min(1.6vw,24px))}.pg-page .pg-table .hub-tablewrap{border:0;margin:0}.pg-page .pg-table caption{color:var(--dh-card-ink);text-align:start;padding-bottom:8px;font-weight:700}.pg-notes{grid-template-columns:repeat(2,minmax(0,1fr));gap:max(14px,min(1.6vw,24px));display:grid}.pg-note{border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);box-shadow:var(--elev-dh-card);padding:max(20px,min(2.2vw,32px))}.pg-note .ds-fact__t{margin-top:0}.pg-note p{color:var(--dh-card-ink-2);margin:12px 0 0;line-height:1.6}.pg-page .pg-note a,.pg-page .ds-limits a{color:var(--dh-blue-ink)}.pg-template{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:max(14px,min(1.6vw,24px));display:grid}.pg-linklist{gap:16px;margin:16px 0 0;padding:0;list-style:none;display:grid}.pg-linklist p{font-size:var(--b-text-sm);margin:4px 0 0}.pg-jump{background:var(--dh-strip)}.pg-jump__list{padding-block:12px calc(var(--b-radius) + 12px);flex-wrap:wrap;gap:8px 32px;margin-top:0;margin-bottom:0;list-style:none;display:flex}.pg-jump__a{min-height:44px;color:var(--dh-on-dark-2);font-size:var(--b-text-sm);align-items:center;gap:10px;text-decoration:none;display:inline-flex}.pg-jump__a:hover{color:var(--dh-on-dark)}html body .pg-page .pg-jump__a:focus-visible{box-shadow:var(--focus-dh);border-radius:4px}.pg-cardset{margin-top:calc(var(--b-radius) * -1);border-radius:var(--b-radius) var(--b-radius) 0 0;background:var(--dh-ground);gap:max(40px,min(6vh,72px));padding-top:max(32px,min(5vh,56px));padding-bottom:max(56px,min(9vh,96px));display:grid;position:relative}.pg-cardgroup{scroll-margin-top:80px}.pg-cardgroup .hub-cards{grid-template-columns:repeat(auto-fill,minmax(min(100%,400px),1fr));gap:max(14px,min(1.6vw,24px));margin-top:20px}.pg-page .hub-card{border:1px solid var(--dh-card-line);border-radius:var(--b-radius);background:var(--dh-card);box-shadow:var(--elev-dh-card);color:var(--dh-card-ink);padding:max(18px,min(2vw,26px))}.pg-page .hub-card p,.pg-page .hub-card li,.pg-page .hub-card dd{color:var(--dh-card-ink-2)}.pg-page .hub-card strong,.pg-page .hub-card dt,.pg-page .hub-card a{color:var(--dh-card-ink)}.pg-page .hub-card__t{color:var(--dh-card-ink);font:700 var(--dh-h3) / 1.2 var(--b-font);letter-spacing:-.015em}.pg-pack .ds-hero__in--stage{grid-template-columns:minmax(0,1fr) auto}.pg-pack .dh-h1{font-size:max(2.25rem,min(min(3.8vw,7vh),3.5rem))}.pg-pack__cover{margin-top:8px;margin-bottom:8px;display:block;transform:rotate(2deg)}.pg-pack__cover .hub-book--l{--w:clamp(150px, 15vw, 210px);box-shadow:var(--elev-dh-device)}.pg-pack__body{grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:start;gap:max(24px,min(3vw,48px));padding-top:max(32px,min(5vh,56px));padding-bottom:max(56px,min(9vh,96px));display:grid}.pg-pack__main,.pg-pack__aside{gap:max(16px,min(2vh,24px));min-width:0;display:grid}.pg-pack__short{color:var(--dh-card-ink);font-size:var(--b-text-lg);margin:0;line-height:1.5}.pg-pack__long p{color:var(--dh-card-ink-2);margin:0 0 12px;line-height:1.6}.pg-pack__practicals>p{margin:16px 0 0}.pg-packlinks{gap:8px;margin:16px 0 0;padding:0;list-style:none;display:grid}.pg-packlink{border:1px solid var(--dh-card-line);border-radius:var(--b-radius-sm);background:var(--dh-card);min-height:44px;color:var(--dh-card-ink);grid-template-columns:auto minmax(0,1fr) auto auto;align-items:center;gap:12px;padding:8px 16px;font-weight:600;text-decoration:none;display:grid}.pg-packlink:hover{color:var(--dh-card-ink);box-shadow:var(--elev-dh-card)}.pg-packlink__m{color:var(--dh-card-ink-2);font-size:var(--b-text-sm);font-weight:400}.pg-dl{margin:12px 0 0;display:grid}.pg-dl>div{border-top:1px solid var(--dh-card-line);grid-template-columns:5.5rem minmax(0,1fr);gap:12px;padding-top:12px;padding-bottom:12px;display:grid}.pg-dl>div:first-child{border-top:0}.pg-dl dt{color:var(--dh-card-ink);font-weight:600}.pg-dl dd{color:var(--dh-card-ink-2);margin:0;line-height:1.5}.pg-pack__fine{font-size:var(--b-text-sm)}.pg-pack__where p:first-child{margin-top:0}.pg-pack__where .dh-tes{gap:2px;margin-top:8px;display:grid}@media (max-width:1100px){.pg-steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px 16px}.pg-steps__item{grid-template-columns:auto minmax(0,1fr);align-items:center}.pg-steps__item:after{display:none}.pg-purposes{grid-template-columns:repeat(3,minmax(0,1fr))}.pg-benches{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:999px){.pg-feature,.pg-feature--flip,.pg-tables,.pg-notes,.pg-template,.pg-courses,.pg-pack__body{grid-template-columns:minmax(0,1fr)}.pg-feature--flip .pg-feature__words{order:0}.pg-pack .ds-hero__in--stage{grid-template-columns:minmax(0,1fr)}}@media (max-width:640px){.pg-benches,.pg-steps,.pg-purposes{grid-template-columns:minmax(0,1fr)}.pg-worlds .ds-world__a{aspect-ratio:16/9}.pg-pack__cover{transform:none}body:has(.pg-pack) .hub-crumbs ol{white-space:nowrap;flex-wrap:nowrap}body:has(.pg-pack) .hub-crumbs li:last-child{text-overflow:ellipsis;min-width:0;overflow:hidden}.pg-page .ds-lines{display:none}}@media (prefers-reduced-motion:reduce){.pg-bench__a,.pg-course{transition:none}.pg-bench__a:hover,.pg-course:hover{transform:none}}:root[data-reduced-motion] .pg-bench__a:hover,:root[data-reduced-motion] .pg-course:hover{transform:none}@media print{.pg-page,.pg-cardset{background:0 0;border-radius:0;margin:0;padding:0}.pg-cardgroup .hub-cards{margin:0}.pg-page .hub-card{box-shadow:none;color:inherit;background:0 0;border-radius:0}.pg-page .hub-card p,.pg-page .hub-card li,.pg-page .hub-card dd,.pg-page .hub-card strong,.pg-page .hub-card dt,.pg-page .hub-card a,.pg-page .hub-card__t{color:inherit}}