:root {
  --bg: #fcfaf7;
  --fg: #141312;
  --muted: #8a8784;
  --faint: #b3b0ac;
  --line: #e6e3df;
  --accent: #3772bb;
  --overlay: #ffffff;
  --iso-line: #1a1918;
  --iso-side: #f3f0ec;
  --iso-shade: #e9e5df;
  --code: #f3f0ec;
  --sans: "Geist Variable", system-ui, sans-serif;
  --mono: "Geist Mono Variable", ui-monospace, monospace;
  color-scheme: light;
}

:root.dark {
  --bg: #131110;
  --fg: #f4f2f0;
  --muted: #86827e;
  --faint: #5b5854;
  --line: #262422;
  --accent: #69a1e8;
  --overlay: #1b1917;
  --iso-line: #d9d5d0;
  --iso-side: #1a1816;
  --iso-shade: #201e1c;
  --code: #1b1917;
  color-scheme: dark;
}

* { box-sizing: border-box; scrollbar-width: none; }
*::-webkit-scrollbar { display: none; }

html, body { margin: 0; background: var(--bg); color: var(--fg); }

body { font: 300 16px/26px var(--sans); -webkit-font-smoothing: antialiased; }

h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -0.02em; }

p { margin: 0; color: var(--muted); }

a { color: inherit; text-decoration: none; }

button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.skip { position: absolute; left: 16px; top: -64px; padding: 8px 12px; background: var(--fg); color: var(--bg); border-radius: 8px; z-index: 60; }
.skip:focus { top: 12px; }

.icon { display: inline-flex; width: 24px; height: 24px; flex: none; }
.icon svg { width: 24px; height: 24px; }

.tool { width: 36px; height: 36px; display: inline-flex; align-items: center; justify-content: center; border-radius: 8px; color: var(--muted); transition: color 160ms ease-out; }
.tool:hover { color: var(--fg); }

.text { color: var(--fg); text-decoration: underline; text-underline-offset: 3px; margin-left: 8px; }

.button { display: inline-flex; align-items: center; gap: 10px; height: 48px; padding: 0 22px; border-radius: 999px; background: var(--fg); color: var(--bg); font-weight: 500; font-size: 15px; transition: opacity 160ms ease-out; }
.button:hover { opacity: 0.86; }

/* Header */
.bar { position: fixed; inset: 0 0 auto; z-index: 40; height: 64px; display: flex; align-items: center; gap: 32px; padding: 0 32px; background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(18px); }
.brand { font-weight: 800; font-size: 20px; letter-spacing: -0.03em; }
.bar nav { display: flex; gap: 24px; }
.link { font-size: 14px; font-weight: 400; color: var(--muted); transition: color 160ms ease-out; }
.link:hover, .link[aria-current="page"] { color: var(--fg); }
.bar .end { margin-left: auto; display: flex; gap: 4px; }

main { min-height: 100vh; }

/* Pages */
.hero { position: relative; min-height: 100vh; display: grid; align-content: end; justify-items: start; gap: 24px; padding: 96px 64px; }
.hero-iso { position: absolute; top: 64px; right: 0; width: 64%; height: calc(100% - 64px); cursor: crosshair; }
.iso { display: block; padding: 0; border: 1px solid transparent; }
.iso canvas { display: block; width: 100%; height: 100%; }
.iso:focus-visible { outline: none; border-color: var(--accent); }
.hero > :not(.iso) { position: relative; z-index: 1; max-width: 44%; }
.hero h1 { font-size: clamp(40px, 6vw, 112px); line-height: 0.95; font-weight: 800; letter-spacing: -0.045em; }
.hero p { font-size: 20px; line-height: 30px; }
.hero h1, .hero p, .hero .button { animation: up 900ms cubic-bezier(0.2, 0.7, 0.2, 1) both; }
.hero p { animation-delay: 120ms; }
.hero .button { animation-delay: 240ms; }

.feature { min-height: 100vh; display: grid; grid-template-columns: 5fr 7fr; grid-template-rows: auto 1fr; gap: 0 64px; padding: 160px 64px 64px; }
.feature-words { grid-area: 1 / 1; }
.feature-iso { grid-area: 2 / 1; width: 100%; height: 100%; min-height: 280px; }
.feature-live { grid-area: 1 / 2 / 3; height: calc(100vh - 224px); min-height: 520px; }
.feature-live .live { height: 100%; min-height: 0; }
.feature:nth-of-type(odd) { grid-template-columns: 7fr 5fr; }
.feature:nth-of-type(odd) .feature-words, .feature:nth-of-type(odd) .feature-iso { grid-column: 2; }
.feature:nth-of-type(odd) .feature-live { grid-column: 1; }
.feature h2, .city h2, .close h2 { font-size: clamp(48px, 7vw, 112px); line-height: 0.95; font-weight: 800; letter-spacing: -0.045em; }
.feature p { margin-top: 24px; font-size: 18px; line-height: 28px; max-width: 30ch; }

.tally { min-height: 100vh; display: grid; grid-template-columns: repeat(3, 1fr); align-content: center; gap: 64px; padding: 128px 64px; }
.tally p { display: grid; gap: 8px; font-size: 18px; }
.tally p > span:first-child { font-size: clamp(64px, 11vw, 176px); line-height: 0.9; font-weight: 800; letter-spacing: -0.05em; color: var(--fg); font-variant-numeric: tabular-nums; }

.city { height: 100vh; min-height: 720px; display: grid; grid-template-columns: 7fr 5fr; grid-template-rows: auto 1fr; gap: 48px 64px; padding: 160px 64px 96px; }
.city h2 { grid-column: 1 / 3; }
.city > * { min-width: 0; }
.city-iso { width: 100%; height: 100%; min-height: 420px; }
.city-names { list-style: none; margin: 0; padding: 0; columns: 3; column-gap: 24px; font-size: 13px; line-height: 24px; align-self: end; }
.city-names a { color: var(--muted); transition: color 160ms ease-out; }
.city-names a:hover, .city-names a:focus-visible, .city-names .on a { color: var(--fg); }

.close { min-height: 100vh; display: grid; align-content: center; justify-items: start; gap: 40px; padding: 128px 64px; }
.close code { font: 400 15px/24px var(--mono); color: var(--muted); overflow-wrap: anywhere; }

@keyframes up { from { opacity: 0; transform: translateY(32px); } }
@supports (animation-timeline: view()) {
  .rise { animation: up linear both; animation-timeline: view(); animation-range: entry 0% entry 80%; }
}
main > :first-child { animation: enter 480ms ease-out both; }
@keyframes enter { from { opacity: 0; } }

.chapters { padding: 160px 64px 128px; }
.chapters h1 { font-size: clamp(48px, 7vw, 112px); line-height: 0.95; font-weight: 800; letter-spacing: -0.045em; }
.find { display: block; width: 100%; margin: 56px 0 72px; padding: 12px 0; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; background: none; color: var(--fg); font: 300 24px/32px var(--sans); outline: none; transition: border-color 160ms ease-out; }
.find::placeholder { color: var(--faint); }
.find:focus-visible { border-color: var(--accent); }
.find.small { margin: 0 0 24px; font-size: 15px; line-height: 24px; padding: 8px 0; }
.none { font-size: 18px; }
.chapters ol { list-style: none; margin: 0; padding: 0; }
.chapters li { display: grid; grid-template-columns: 64px minmax(160px, 1fr) 2fr; gap: 0 24px; align-items: baseline; padding: 22px 0; border-top: 1px solid var(--line); }
.chapters .n { font: 400 13px/20px var(--mono); color: var(--faint); }
.chapters .name { font-size: 28px; line-height: 36px; font-weight: 700; letter-spacing: -0.02em; }
.chapters .titles { display: flex; flex-wrap: wrap; gap: 4px 20px; font-size: 14px; line-height: 22px; min-width: 0; }
.titles a, .side a { color: var(--muted); transition: color 160ms ease-out; overflow-wrap: anywhere; }
.titles a:hover, .side a:hover, .side a[aria-current="page"], .side-chapter[data-on] { color: var(--fg); }

.reader { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 64px; padding: 0 64px; }
.side { position: sticky; top: 64px; height: calc(100vh - 64px); overflow-y: auto; padding: 32px 8px 64px 0; overscroll-behavior: contain; scroll-padding-block: 64px; }
.side nav > div { margin-bottom: 4px; }
.side-chapter { display: block; padding: 4px 0; font-size: 15px; font-weight: 500; }
.side ol { list-style: none; margin: 4px 0 12px; padding: 0 0 0 14px; border-left: 1px solid var(--line); font-size: 13px; line-height: 20px; }
.side li { padding: 4px 0; }
.story { padding: 96px 0 96px; min-width: 0; }
.crumb { font-size: 14px; color: var(--muted); }
.story h1 { font-size: clamp(28px, 3vw, 44px); line-height: 1.05; letter-spacing: -0.035em; font-weight: 800; margin: 8px 0 32px; overflow-wrap: anywhere; }

.live { position: relative; height: 72vh; min-height: 520px; background: var(--bg); }
.live iframe { display: block; width: 100%; height: 100%; border: 0; background: var(--bg); }
.live-state { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; gap: 10px; font-size: 14px; color: var(--muted); background: var(--bg); }
.live-tools { position: absolute; top: 8px; right: 8px; display: flex; gap: 2px; opacity: 0; transition: opacity 160ms ease-out; }
.live:hover .live-tools, .live:focus-within .live-tools { opacity: 1; }
.live.full { position: fixed; inset: 0; z-index: 70; height: auto; }
.spin { width: 16px; height: 16px; border: 1.5px solid var(--line); border-top-color: var(--muted); border-radius: 50%; animation: spin 800ms linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.skip-live { position: absolute; left: -9999px; }
.skip-live:focus { position: static; display: inline-block; margin-bottom: 12px; color: var(--accent); }

.capture { margin: 0; }
.capture figcaption { margin-top: 16px; font: 400 12px/18px var(--mono); color: var(--faint); }
img.shot { display: block; max-width: 100%; height: auto; }
.windows { margin-top: 96px; }
.shots { display: flex; flex-wrap: wrap; align-items: flex-start; gap: 32px; }

.pager { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; margin-top: 96px; font-size: 18px; font-weight: 600; }
.pager a { max-width: 100%; color: var(--muted); overflow-wrap: anywhere; transition: color 160ms ease-out; }
.pager a:hover { color: var(--fg); }
.pager .next { margin-left: auto; text-align: right; }

.docs { display: grid; grid-template-columns: 200px minmax(0, 720px) 200px; justify-content: center; gap: 64px; padding: 0 64px; }
.docs-rail, .doc-toc { position: sticky; top: 64px; height: calc(100vh - 64px); overflow-y: auto; padding: 96px 8px 64px; margin: 0 -8px; }
.docs-rail ol, .doc-toc ol { list-style: none; margin: 0; padding: 0; }
.docs-rail li { padding: 5px 0; font-size: 15px; }
.doc-toc li { padding: 4px 0; font-size: 13px; line-height: 20px; }
.docs-rail a, .doc-toc a { color: var(--muted); transition: color 160ms ease-out; }
.doc-toc a { color: var(--faint); }
.docs-rail a:hover, .doc-toc a:hover, .docs-rail a[aria-current="page"] { color: var(--fg); }
.docs-rail a[aria-current="page"] { font-weight: 500; }
.doc { padding: 96px 0 128px; min-width: 0; }
.doc h1 { font-size: clamp(36px, 4vw, 56px); line-height: 1.05; font-weight: 800; letter-spacing: -0.035em; margin-bottom: 40px; hyphens: auto; overflow-wrap: break-word; }
.prose { font-size: 17px; line-height: 30px; overflow-wrap: anywhere; }
.prose p, .prose li { color: color-mix(in srgb, var(--fg) 82%, var(--bg)); }
.prose p { margin: 0 0 20px; }
.prose h2 { font-size: 28px; line-height: 36px; font-weight: 700; letter-spacing: -0.02em; margin: 64px 0 16px; scroll-margin-top: 96px; }
.prose h3 { font-size: 20px; line-height: 28px; font-weight: 600; margin: 40px 0 12px; scroll-margin-top: 96px; }
.prose a { color: var(--fg); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line); }
.prose a:hover { text-decoration-color: var(--fg); }
.prose ul, .prose ol { margin: 0 0 20px; padding-left: 22px; }
.prose code { font: 400 0.86em/1 var(--mono); background: var(--code); padding: 3px 6px; border-radius: 6px; }
.prose table { width: 100%; border-collapse: collapse; margin: 8px 0 28px; font-size: 15px; line-height: 24px; }
.prose th, .prose td { text-align: left; vertical-align: top; padding: 12px 16px 12px 0; border-top: 1px solid var(--line); }
.prose th { font-weight: 600; }
.prose td { color: color-mix(in srgb, var(--fg) 82%, var(--bg)); }
.prose th, .prose td { overflow-wrap: break-word; }
.prose td code { overflow-wrap: anywhere; }
.code { position: relative; margin: 28px 0; background: var(--code); border-radius: 12px; }
.code figcaption { padding: 14px 88px 0 20px; font: 400 12px/18px var(--mono); color: var(--faint); overflow-wrap: anywhere; }
.code pre { margin: 0; padding: 16px 20px 20px; overflow-x: auto; }
.code code { display: block; font: 400 13.5px/22px var(--mono); background: none; padding: 0; color: var(--fg); }
.code .copy { position: absolute; top: 10px; right: 12px; padding: 4px 8px; font-size: 12px; color: var(--muted); transition: color 160ms ease-out; }
.code .copy:hover { color: var(--fg); }

.missing { min-height: 70vh; display: grid; align-content: center; justify-items: start; gap: 24px; padding: 160px 64px; }
.missing h1 { font-size: 64px; letter-spacing: -0.04em; }

.foot { display: flex; flex-wrap: wrap; gap: 8px 28px; padding: 48px 64px; font-size: 13px; color: var(--faint); }
.foot a { text-decoration: underline; text-underline-offset: 3px; }

@media (max-width: 1279px) {
  .docs { grid-template-columns: 200px minmax(0, 720px); }
  .doc-toc { display: none; }
}

@media (max-width: 1023px) {
  .docs { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .docs-rail { position: static; height: auto; overflow: visible; padding: 96px 0 0; margin: 0; }
  .docs-rail ol { display: flex; flex-wrap: wrap; gap: 4px 20px; }
  .doc { padding-top: 48px; }
  .reader { grid-template-columns: minmax(0, 1fr); }
  .side { display: none; }
  .feature, .feature:nth-of-type(odd), .city { grid-template-columns: minmax(0, 1fr); grid-template-rows: none; gap: 32px; }
  .feature-words, .feature-iso, .feature-live, .feature:nth-of-type(odd) .feature-words, .feature:nth-of-type(odd) .feature-iso, .feature:nth-of-type(odd) .feature-live, .city h2 { grid-area: auto; }
  .feature-iso { min-height: 280px; }
  .feature-live { height: 70vh; min-height: 420px; }
  .city { height: auto; }
}

@media (max-width: 767px) {
  .bar { padding: 0 16px; gap: 12px; }
  .bar .end { gap: 0; }
  .hero, .chapters, .missing { padding-left: 20px; padding-right: 20px; }
  .reader, .docs { padding: 0 20px; }
  .chapters li { grid-template-columns: 40px minmax(0, 1fr); }
  .chapters .titles { grid-column: 2; margin-top: 8px; }
  .foot { padding: 32px 20px; }
  .chapters .name { font-size: 22px; }
  .hero-iso { width: 100%; height: 55%; }
  .hero > :not(.iso) { max-width: none; }
  .hero h1, .chapters h1 { font-size: 13vw; }
  .feature h2, .city h2, .close h2 { font-size: 10vw; }
  .feature, .city { padding: 112px 20px 48px; }
  .feature-iso { min-height: 220px; }
  .tally { grid-template-columns: 1fr; padding: 112px 20px; }
  .city-iso { min-height: 260px; }
  .city-names { columns: 2; }
  .close { padding: 112px 20px; }
}

@media (max-width: 359px) {
  .bar { padding: 0 12px; gap: 10px; }
  .bar nav { gap: 14px; }
  .bar .tool { width: 32px; }
  .bar .sound { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}