/* Developer Docs · type pairing · Designed using Design Lounge (https://www.designlounge.live) */
@import url("https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500&display=swap");

/* Night Desk · full palette · Designed using Design Lounge (https://www.designlounge.live) */
:root {
  --primary: #e0a34b;
  --primary-ink: #141210;
  --primary-soft: #45361f;
  --secondary: #8fbf7a;
  --secondary-ink: #141210;
  --secondary-soft: #323c2a;
  --tertiary: #c48a8a;
  --tertiary-ink: #141210;
  --tertiary-soft: #3e302e;

  --bg: #141311;
  --surface: #1b1a17;
  --surface-2: #242320;
  --surface-3: #383733;
  --ink: #ece7dc;
  --ink-2: #a7a196;
  --ink-3: #928d83;
  --line: #2b2925;
  --line-strong: #74716b;

  --success: #8fbf7a;
  --success-soft: #323c2a;
  --success-on-soft: #8fbf7a;
  --warning: #e08a3a;
  --warning-soft: #45301b;
  --danger: #e07060;
  --danger-soft: #452924;
  --danger-on-soft: #e48173;
  --info: #8ab4c8;

  --focus: #e0a34b;
  --link: #e0a34b;
  --overlay: #070605;
  --inverse: #ece7dc;
  --inverse-ink: #141311;
  --accent: var(--primary);
  --accent-ink: var(--primary-ink);
}

/* Developer Docs fonts */
:root {
  --font-display: "Geist", "Helvetica Neue", Arial, sans-serif;
  --font-text: "Geist", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* Motion tokens · Designed using Design Lounge (https://www.designlounge.live) */
:root {
  --ease-standard: cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-expo-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-expo-in: cubic-bezier(0.7, 0, 0.84, 0);
  --t-micro: 120ms;
  --t-fast: 160ms;
  --t-ui: 200ms;
  --t-layout: 320ms;
  --t-sheet: 400ms;
  --t-hero: 640ms;
}

/* Sharp family: radius 0, 1px rules, no shadows, uppercase 11px labels */
:root {
  --radius: 0px;
  --frame: 1200px;
  --edge: 40px;
  --pad: 48px;
  --nav-h: 64px;
  --gap: 24px;
  --gap-half: 12px;
  --section: 136px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-text);
  font-weight: 400;
  font-size: 18px;
  line-height: 1.55;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1;
  margin: 0;
}
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
code, kbd, samp, .mono, .num { font-family: var(--font-mono); font-weight: 400; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.preload *, .preload *::before, .preload *::after { transition: none !important; }

.ico {
  width: 16px; height: 16px; flex: none;
  fill: none; stroke: currentColor; stroke-width: 1.75;
  stroke-linecap: round; stroke-linejoin: round;
}
.btn-ico svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }

.skip {
  position: absolute; left: 12px; top: -60px; z-index: 40;
  background: var(--primary); color: var(--primary-ink);
  padding: 10px 14px; font-size: 14px;
}
.skip:focus { top: 12px; }

.frame {
  position: relative;
  width: min(100% - 2 * var(--edge), var(--frame));
  margin-inline: auto;
  padding-inline: var(--pad);
}

.label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-2);
  line-height: 1;
}

.example {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  line-height: 1.4;
}

.body { font-size: 18px; color: var(--ink-2); max-width: 46ch; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 14px;
  min-height: 48px; padding: 0 20px;
  border: 1px solid transparent; border-radius: var(--radius);
  font-size: 15px; font-weight: 500; line-height: 1; white-space: nowrap;
  transition: background-color var(--t-fast) var(--ease-standard),
              color var(--t-fast) var(--ease-standard),
              border-color var(--t-fast) var(--ease-standard),
              transform var(--t-ui) var(--ease-standard);
}
.btn:active { transform: scale(0.98); }
.btn-sm { min-height: 40px; padding: 0 16px; font-size: 14px; }
.btn-block { width: 100%; }
.btn-primary { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); padding-right: 10px; }
.btn-primary:hover { background: transparent; color: var(--primary); }
.btn-outline { border-color: var(--line-strong); color: var(--ink); }
.btn-outline:hover { background: var(--surface-2); border-color: var(--ink-2); }
.btn-ink { background: var(--primary-ink); color: var(--primary); border-color: var(--primary-ink); padding-right: 10px; }
.btn-ink:hover { background: transparent; color: var(--primary-ink); }
.btn-ink-outline { border-color: var(--primary-ink); color: var(--primary-ink); }
.btn-ink-outline:hover { background: color-mix(in srgb, var(--primary-ink) 10%, transparent); }
.btn-ico {
  display: grid; place-items: center; width: 28px; height: 28px;
  background: var(--primary-ink); color: var(--primary);
  transition: transform var(--t-ui) var(--ease-standard), background-color var(--t-fast) var(--ease-standard), color var(--t-fast) var(--ease-standard);
}
.btn-primary:hover .btn-ico { transform: translate(2px, -2px) scale(1.06); background: var(--primary); color: var(--primary-ink); }
.btn-ink .btn-ico { background: var(--primary); color: var(--primary-ink); }
.btn-ink:hover .btn-ico { transform: translate(2px, -2px) scale(1.06); background: var(--primary-ink); color: var(--primary); }

.text-link { font-size: 14px; color: var(--ink-2); padding: 10px 4px; transition: color var(--t-fast) var(--ease-standard); }
.text-link:hover { color: var(--ink); }

.copy-btn {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 40px; padding: 0 12px;
  border: 1px solid var(--line); color: var(--ink-2);
  font-size: 13px; font-weight: 500;
  transition: color var(--t-fast) var(--ease-standard), border-color var(--t-fast) var(--ease-standard);
}
.copy-btn:hover { color: var(--ink); border-color: var(--line-strong); }
.copy-btn.copied { color: var(--primary); border-color: var(--primary); }

/* ---------- Header: navbar-hide-on-scroll ---------- */
.top {
  position: fixed; inset: 0 0 auto 0; z-index: 30;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: transform 280ms var(--ease-standard), background-color var(--t-layout) var(--ease-standard), border-color var(--t-layout) var(--ease-standard);
}
.top.hidden { transform: translateY(-100%); }
.top.raised { border-bottom-color: var(--line-strong); }
.bar {
  height: var(--nav-h);
  display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 40px;
}
.logo {
  display: inline-flex; align-items: baseline;
  font-family: var(--font-display); font-weight: 600; font-size: 20px; letter-spacing: -0.04em;
  color: var(--ink); padding: 8px 0;
  transition: color 240ms var(--ease-standard);
}
.logo-dot { width: 6px; height: 6px; background: var(--primary); margin-left: 2px; }
.links ul { display: flex; gap: 4px; }
.links a {
  position: relative; display: inline-flex; align-items: center; min-height: 40px; padding: 8px 12px;
  font-size: 14px; font-weight: 500; color: var(--ink-2);
  transition: color var(--t-fast) var(--ease-standard);
}
.links a:hover, .links a[aria-current="true"] { color: var(--ink); }
.links a::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 4px; height: 2px;
  background: var(--primary); transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-ui) var(--ease-standard);
}
.links a[aria-current="true"]::after { transform: scaleX(1); }
.actions { display: flex; align-items: center; gap: 16px; }

.burger {
  display: none; position: relative; width: 44px; height: 44px;
  border: 1px solid var(--line-strong);
  transition: border-color 300ms var(--ease-standard), background-color 300ms var(--ease-standard);
}
.burger span {
  position: absolute; left: 11px; width: 20px; height: 2px; background: var(--ink);
  transition: transform 300ms var(--ease-expo-out), opacity 160ms var(--ease-standard), background-color 300ms var(--ease-standard);
}
.burger span:nth-child(1) { top: 14px; }
.burger span:nth-child(2) { top: 20px; }
.burger span:nth-child(3) { top: 26px; }

/* ---------- Phone menu: hamburger-circle-reveal ---------- */
.menu {
  position: fixed; inset: 0; z-index: 20;
  background: var(--primary); color: var(--primary-ink);
  overflow-y: auto;
  clip-path: circle(0px at var(--cx, calc(100% - 42px)) var(--cy, 32px));
  visibility: hidden;
  transition: clip-path 500ms var(--ease-expo-in) 160ms, visibility 0s linear 660ms;
}
.menu-inner {
  min-height: 100%;
  display: flex; flex-direction: column;
  padding: calc(var(--nav-h) + 24px) 20px max(28px, env(safe-area-inset-bottom));
}
.menu-kicker { color: var(--primary-ink); opacity: .72; padding-bottom: 14px; border-bottom: 1px solid color-mix(in srgb, var(--primary-ink) 22%, transparent); }
.menu-links li { overflow: hidden; border-bottom: 1px solid color-mix(in srgb, var(--primary-ink) 22%, transparent); }
.menu-links a {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 72px;
  font-family: var(--font-display); font-weight: 600; font-size: 40px; letter-spacing: -0.045em; line-height: 1;
  white-space: nowrap;
  transform: translateY(105%);
  transition: transform 240ms var(--ease-expo-in) calc((3 - var(--i)) * 30ms);
}
.menu-links .ico { width: 24px; height: 24px; opacity: 0; transform: translateX(-8px); transition: opacity var(--t-ui) var(--ease-expo-out), transform var(--t-ui) var(--ease-expo-out); }
.menu-links a:hover .ico, .menu-links a:focus-visible .ico { opacity: 1; transform: none; }
.menu-links a:focus-visible { outline: 2px solid var(--primary-ink); outline-offset: -2px; }
.menu-foot {
  margin-top: auto; padding-top: 40px; display: grid; gap: 16px;
  opacity: 0; transform: translateY(12px);
  transition: opacity 160ms var(--ease-standard), transform 160ms var(--ease-standard);
}
.menu-social { display: flex; flex-wrap: wrap; gap: 0 24px; }
.menu-social a { display: inline-flex; align-items: center; min-height: 44px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.menu-foot :focus-visible { outline-color: var(--primary-ink); }

.menu-open .menu {
  clip-path: circle(var(--r, 1200px) at var(--cx, calc(100% - 42px)) var(--cy, 32px));
  visibility: visible;
  transition: clip-path 500ms var(--ease-expo-out), visibility 0s;
}
.menu-open .menu-links a { transform: none; transition: transform 520ms var(--ease-expo-out) calc(180ms + var(--i) * 50ms); }
.menu-open .menu-foot { opacity: 1; transform: none; transition: opacity 420ms var(--ease-standard) 460ms, transform 520ms var(--ease-expo-out) 460ms; }
.menu-open .top { background: transparent; border-bottom-color: transparent; -webkit-backdrop-filter: none; backdrop-filter: none; }
.menu-open .top .logo { color: var(--primary-ink); transition-delay: 0s; }
.menu-open .top .logo-dot { background: var(--primary-ink); }
.menu-open .burger { border-color: var(--primary-ink); }
.menu-open .burger span { background: var(--primary-ink); }
.menu-open .burger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-open .burger span:nth-child(2) { opacity: 0; transform: scaleX(.2); }
.menu-open .burger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.menu-open .burger:focus-visible { outline-color: var(--primary-ink); }
.top .logo { transition-delay: 380ms; }
.menu-open { overflow: hidden; }

/* ---------- Hero: landing-devtool-dark + webgl-shader-hero ---------- */
.hero {
  position: relative; isolation: isolate; overflow: hidden;
  min-height: 100dvh;
  display: flex; flex-direction: column;
  padding-top: var(--nav-h);
}
.fallback {
  position: absolute; inset: 0; z-index: -3;
  background:
    radial-gradient(55% 65% at 80% 38%, color-mix(in srgb, var(--primary) 30%, transparent), transparent 62%),
    radial-gradient(50% 60% at 64% 74%, color-mix(in srgb, var(--primary-soft) 90%, transparent), transparent 70%),
    linear-gradient(160deg, var(--surface-2) 0%, var(--bg) 70%);
}
#gl {
  position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; display: block;
  opacity: 0; transition: opacity 800ms var(--ease-standard);
}
#gl.on { opacity: 1; }
.scrim {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--bg) 90%, transparent) 0%, color-mix(in srgb, var(--bg) 72%, transparent) 36%, transparent 60%),
    linear-gradient(0deg, color-mix(in srgb, var(--bg) 80%, transparent) 0%, transparent 22%);
}
.hero-grid {
  flex: 1;
  display: grid; grid-template-columns: minmax(0, 1fr) 540px; gap: 56px; align-items: center;
  padding-top: 56px; padding-bottom: 56px;
  border-inline: 1px solid var(--line);
}
.hero-copy { max-width: 560px; }
.hero-copy .label { margin-bottom: 28px; }
h1 {
  font-size: 72px; line-height: .98; letter-spacing: -0.045em;
  text-wrap: balance;
}
h1 em { font-style: normal; color: var(--primary); }
.lede { margin-top: 28px; font-size: 18px; line-height: 1.5; color: var(--ink-2); max-width: 470px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.chip {
  display: inline-flex; align-items: stretch; margin-top: 24px;
  border: 1px solid var(--line); background: var(--surface);
  max-width: 100%;
}
.chip code { display: flex; align-items: center; padding: 0 16px; font-size: 14px; color: var(--ink); white-space: nowrap; overflow-x: auto; }
.chip .prompt { color: var(--ink-3); margin-right: 10px; user-select: none; }
.chip-copy {
  display: grid; place-items: center; width: 44px; min-height: 44px;
  border-left: 1px solid var(--line); color: var(--ink-2);
  transition: color var(--t-fast) var(--ease-standard);
}
.chip-copy:hover { color: var(--ink); }
.chip-copy .i-check, .chip-copy.copied .i-copy { display: none; }
.chip-copy.copied .i-check { display: block; }
.chip-copy.copied { color: var(--primary); }

/* Trace card */
.tracecard {
  margin: 0; min-width: 0;
  background: var(--surface);
  border: 1px solid var(--line-strong);
}
.tc-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 8px 8px 8px 0; border-bottom: 1px solid var(--line); }
.tc-tabs { display: flex; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.tc-tabs::-webkit-scrollbar { display: none; }
.tc-tabs button, .deck-tabs button {
  flex: none; min-height: 40px; padding: 0 14px;
  font-family: var(--font-mono); font-size: 12px; color: var(--ink-3);
  border-right: 1px solid var(--line);
  transition: color var(--t-fast) var(--ease-standard), background-color var(--t-fast) var(--ease-standard);
}
.tc-tabs button:hover, .deck-tabs button:hover { color: var(--ink); }
.tc-tabs button[aria-selected="true"], .deck-tabs button[aria-selected="true"] { background: var(--surface-2); color: var(--ink); }
.tc-tabs button:focus-visible, .deck-tabs button:focus-visible { outline-offset: -2px; }
.tc-panel { animation: panelIn 280ms var(--ease-expo-out); }
@keyframes panelIn { from { opacity: 0; transform: translateY(4px); } }
.tc-meta { display: flex; justify-content: space-between; padding: 14px 16px 6px; font-size: 12px; color: var(--ink-3); }
.wf { padding: 4px 16px 12px; }
.wf li {
  display: grid; grid-template-columns: 92px 96px minmax(0, 1fr) 34px; align-items: center; gap: 10px;
  min-height: 32px;
  font-family: var(--font-mono); font-size: 12px;
}
.wf .svc { color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.wf .op { color: var(--ink-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.wf .dur { color: var(--ink-2); text-align: right; }
.wf .slow .svc, .wf .slow .dur { color: var(--primary); }
.track {
  position: relative; height: 10px;
  background-image: linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 25% 100%;
}
.track i {
  position: absolute; inset: 0;
  transform-origin: left;
  transform: translateX(var(--s)) scaleX(var(--w));
  animation: grow 700ms var(--ease-expo-out) both;
  animation-delay: calc(var(--i) * 60ms);
}
@keyframes grow { from { transform: translateX(var(--s)) scaleX(0); } }
.c-ink { background: var(--line-strong); }
.c-ter { background: var(--tertiary); }
.c-sec { background: var(--secondary); }
.c-pri { background: var(--primary); }
.tc-detail { margin: 0; padding: 12px 16px; border-top: 1px solid var(--line); display: grid; gap: 6px; }
.tc-detail div { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 10px; font-size: 12px; line-height: 1.5; }
.tc-detail dt { font-family: var(--font-mono); color: var(--ink-3); }
.tc-detail dd { margin: 0; color: var(--ink-2); overflow-wrap: anywhere; }
.tc-detail .hint { color: var(--primary); }
.tc-timing {
  display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 12px;
  padding: 12px 16px; border-top: 1px solid var(--line);
  font-size: 12px; color: var(--ink-3);
}
.tc-bar { height: 4px; background: var(--surface-3); position: relative; overflow: hidden; }
.tc-bar i {
  position: absolute; inset: 0; background: var(--primary);
  transform-origin: left; transform: scaleX(var(--f, .551));
  animation: bar 700ms var(--ease-expo-out) both;
}
@keyframes bar { from { transform: scaleX(0); } }
.tc-slow { color: var(--primary); }
.tracecard .example { padding: 10px 16px 12px; border-top: 1px solid var(--line); }

.hero-band {
  display: flex; align-items: center; gap: 40px;
  min-height: 72px;
  border-top: 1px solid var(--line);
  border-inline: 1px solid var(--line);
  font-size: 12px; letter-spacing: .06em; color: var(--ink-2);
}
.pause {
  display: inline-flex; align-items: center; gap: 10px;
  min-height: 44px; padding: 0 14px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em; color: var(--ink);
  transition: border-color var(--t-ui) var(--ease-standard), background-color var(--t-ui) var(--ease-standard);
}
.pause:hover { border-color: var(--primary); }
.pause .i-play, .pause[aria-pressed="true"] .i-pause { display: none; }
.pause[aria-pressed="true"] .i-play { display: block; }
.no-gl .pause { display: none; }

/* ---------- Install: code-snippet-tabs ---------- */
.install { background: var(--surface); border-top: 1px solid var(--line); }
.install-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) 600px; gap: 72px; align-items: start;
  padding-top: var(--section); padding-bottom: var(--section);
  border-inline: 1px solid var(--line);
}
.install-copy .label, .how-intro .label { margin-bottom: 24px; }
h2 { font-size: 52px; line-height: 1.02; letter-spacing: -0.04em; text-wrap: balance; }
h2 + .body { margin-top: 24px; }
.ticks { margin-top: 32px; display: grid; gap: var(--gap-half); }
.ticks li { display: flex; align-items: center; gap: 12px; font-size: 16px; color: var(--ink-2); }
.ticks .ico { color: var(--ink-3); }

.deck { min-width: 0; background: var(--bg); border: 1px solid var(--line-strong); }
.deck-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding: 10px 12px 10px 0; border-bottom: 1px solid var(--line); }
.deck-tabs { display: flex; }
.deck-tabs button { font-family: var(--font-text); font-size: 13px; font-weight: 500; min-height: 40px; }
.deck-tabs button:first-child { border-left: 0; }
.deck-file { padding: 10px 20px; border-bottom: 1px solid var(--line); font-size: 12px; color: var(--ink-3); }
.deck-panel {
  margin: 0; padding: 20px;
  min-height: 236px;
  font-family: var(--font-mono); font-size: 14px; line-height: 1.7; color: var(--ink);
  white-space: pre; overflow-x: auto; tab-size: 2;
}
.deck-panel:focus-visible { outline-offset: -2px; }
.deck-panel code { font-family: inherit; }
.k-com { color: var(--ink-3); }
.k-key { color: var(--tertiary); }
.k-str { color: var(--secondary); }
.k-num { color: var(--ink); font-weight: 500; }
.k-fn { color: var(--ink); font-weight: 500; }
.mark { background: var(--primary-soft); color: var(--primary); padding: 1px 3px; }
.deck-example { padding: 10px 20px 12px; border-top: 1px solid var(--line); }

/* ---------- How it works: features-sticky-scroll-steps ---------- */
.how { border-top: 1px solid var(--line); }
.how-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) 560px; gap: 72px;
  padding-top: var(--section);
  border-inline: 1px solid var(--line);
}
.how-intro { padding-bottom: 72px; }
.steps { position: relative; }
.steps::before { content: ""; position: absolute; left: 19px; top: 40px; bottom: 0; width: 1px; background: var(--line); }
.step {
  position: relative; min-height: 62vh; padding: 40px 0 0 72px;
  opacity: .38; transition: opacity 560ms var(--ease-standard);
}
.step:last-child { min-height: 86vh; }
.step.on { opacity: 1; }
.num-btn {
  position: absolute; left: 0; top: 34px;
  display: grid; place-items: center; width: 40px; height: 40px;
  border: 1px solid var(--line-strong); background: var(--bg);
  font-size: 14px; color: var(--ink-2);
  transition: background-color 180ms var(--ease-standard), color 180ms var(--ease-standard), border-color 180ms var(--ease-standard);
}
.step.on .num-btn { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.step h3 { font-size: 32px; letter-spacing: -0.03em; line-height: 1.08; }
.step p { margin-top: 16px; font-size: 18px; color: var(--ink-2); max-width: 44ch; }
.step-facts { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 8px; }
.step-facts li { font-family: var(--font-mono); font-size: 12px; color: var(--ink-2); border: 1px solid var(--line); padding: 7px 10px; }

.how-aside { min-width: 0; }
.sticky { position: sticky; top: 104px; padding-bottom: 96px; }
.viz { margin: 0; background: var(--surface); border: 1px solid var(--line-strong); }
.vh { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.vh-title { font-family: var(--font-mono); font-size: 14px; font-weight: 500; }
.vh-meta { font-size: 12px; color: var(--ink-3); }
.plot { padding: 20px 20px 16px; }
.ruler {
  display: flex; justify-content: space-between;
  margin-left: calc(176px + 16px); padding-bottom: 10px;
  font-size: 11px; color: var(--ink-3);
  transition: opacity 560ms var(--ease-standard);
}
.vrows li {
  display: grid; grid-template-columns: 176px minmax(0, 1fr); gap: 16px; align-items: center;
  min-height: 48px;
  transition: opacity 560ms var(--ease-standard);
}
.vl { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: color 560ms var(--ease-standard); }
.vl b { font-weight: 500; color: var(--ink); }
.vt {
  position: relative; height: 14px;
  background-image: linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 25% 100%;
}
.vt .bar {
  position: absolute; inset: 0; transform-origin: left;
  transform: translateX(var(--s)) scaleX(var(--w));
  transition: transform 560ms var(--ease-expo-out), background-color 560ms var(--ease-standard), opacity 560ms var(--ease-standard);
}
.vt .ghost {
  position: absolute; top: -3px; bottom: -3px;
  left: var(--gs); width: calc(var(--gw) * 100%);
  border: 1px dashed var(--ink-3);
  opacity: 0; transition: opacity 560ms var(--ease-standard);
}
.vt .tag, .vt .delta {
  position: absolute; left: var(--s); bottom: calc(100% + 6px);
  font-size: 11px; line-height: 1; padding: 3px 5px;
  opacity: 0; transform: translateY(4px);
  transition: opacity 560ms var(--ease-standard), transform 560ms var(--ease-expo-out);
}
.vt .tag { background: var(--primary-soft); color: var(--primary); }
.vt .delta { background: var(--danger-soft); color: var(--danger-on-soft); }

.viz[data-step="1"] .ruler { opacity: 0; }
.viz[data-step="1"] .vt .bar { transform: translateX(var(--x)) scaleX(.12); background: var(--surface-3); }
.viz[data-step="1"] .vl b { color: var(--ink-2); }
.viz[data-step="3"] .vrows li:not(.crit) { opacity: .28; }
.viz[data-step="3"] .vrows li.crit:not(.hot) .bar { opacity: .55; }
.viz[data-step="3"] .hot .tag { opacity: 1; transform: none; }
.viz[data-step="4"] .ghost { opacity: 1; }
.viz[data-step="4"] .hot .delta { opacity: 1; transform: none; }
.viz[data-step="4"] .vrows li:not(.hot) .bar { opacity: .6; }

.foot { position: relative; height: 92px; border-top: 1px solid var(--line); }
.panel {
  position: absolute; inset: 0; padding: 18px 20px;
  display: grid; align-content: center; gap: 6px;
  opacity: 0; transform: translateY(12px);
  transition: opacity 560ms var(--ease-standard), transform 560ms var(--ease-expo-out);
}
.panel b { font-size: 28px; font-weight: 500; letter-spacing: -0.03em; line-height: 1; color: var(--ink); }
.panel span { font-size: 15px; color: var(--ink-2); }
.p3 b { color: var(--primary); }
.p4 b { color: var(--danger-on-soft); }
.viz[data-step="1"] .p1, .viz[data-step="2"] .p2, .viz[data-step="3"] .p3, .viz[data-step="4"] .p4 { opacity: 1; transform: none; }
.viz .example { padding: 10px 20px 12px; border-top: 1px solid var(--line); }

/* ---------- Footer: footer-sitemap-columns ---------- */
.site-footer { border-top: 1px solid var(--line); }
.pre { background: var(--primary); color: var(--primary-ink); }
.pre-inner {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 48px; flex-wrap: wrap;
  padding-top: 112px; padding-bottom: 112px;
  border-inline: 1px solid color-mix(in srgb, var(--primary-ink) 18%, transparent);
}
.pre-statement {
  font-family: var(--font-display); font-weight: 600;
  font-size: 56px; line-height: 1; letter-spacing: -0.045em;
  max-width: 16ch; text-wrap: balance;
}
.pre-statement .scr-g { color: var(--primary-ink); opacity: .4; }
.pre-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.pre :focus-visible { outline-color: var(--primary-ink); }

.foot-body { padding-top: 72px; padding-bottom: 32px; border-inline: 1px solid var(--line); }
.ftop { display: grid; grid-template-columns: minmax(0, 2.1fr) repeat(5, minmax(0, 1fr)); gap: 32px; }
.brand .logo { font-size: 22px; }
.mission { margin-top: 16px; font-size: 15px; line-height: 1.5; color: var(--ink-2); max-width: 34ch; }
.news { margin-top: 28px; }
.news .label { display: block; margin-bottom: 10px; }
.news-row { display: flex; gap: 8px; max-width: 380px; }
.news input {
  flex: 1; min-width: 0; min-height: 44px; padding: 0 12px;
  background: var(--surface-2); border: 1px solid var(--line-strong); border-radius: 0;
  font-size: 15px; color: var(--ink);
  transition: border-color var(--t-fast) var(--ease-standard);
}
.news input::placeholder { color: var(--ink-3); }
.news input:hover { border-color: var(--ink-2); }
.news input:focus-visible { border-color: var(--primary); outline-offset: 1px; }
.news input[aria-invalid="true"] { border-color: var(--danger); }
.news .btn { min-height: 44px; }
.hint-line { margin-top: 10px; font-size: 13px; color: var(--ink-3); }
.hint-line.err { color: var(--danger-on-soft); }
.hint-line.ok { color: var(--success-on-soft); }

.col h2 { font-size: inherit; letter-spacing: 0; line-height: 1; }
.col h2 button {
  display: flex; width: 100%; align-items: center; justify-content: space-between;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-3); cursor: default; padding: 4px 0 18px; text-align: left;
}
.col .chev { display: none; transition: transform 260ms var(--ease-standard); }
.col ul { display: grid; gap: 12px; }
.col li { display: flex; align-items: center; gap: 8px; }
.col li a {
  font-size: 15px; color: var(--ink-2); white-space: nowrap;
  text-decoration: underline; text-decoration-color: transparent; text-underline-offset: 4px; text-decoration-thickness: 1px;
  transition: color var(--t-fast) var(--ease-standard), text-decoration-color var(--t-fast) var(--ease-standard);
}
.col li a:hover { color: var(--ink); text-decoration-color: var(--line-strong); }
.badge { font-family: var(--font-mono); font-size: 10px; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; color: var(--primary); border: 1px solid var(--primary); padding: 2px 5px; line-height: 1.2; }

.mid {
  display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: end; gap: 32px;
  margin-top: 72px; padding-bottom: 24px; border-bottom: 1px solid var(--line);
}
.status {
  justify-self: start; display: inline-flex; align-items: center; gap: 10px;
  min-height: 44px; padding: 0 14px; border: 1px solid var(--line);
  font-size: 14px; color: var(--ink);
  transition: border-color var(--t-fast) var(--ease-standard);
}
.status:hover { border-color: var(--line-strong); }
.status-meta { font-size: 12px; color: var(--ink-3); }
.dot { position: relative; width: 8px; height: 8px; border-radius: 50%; background: var(--success); flex: none; }
.dot::after { content: ""; position: absolute; inset: 0; border-radius: 50%; background: var(--success); animation: pulse 2.8s var(--ease-standard) infinite; }
@keyframes pulse { 0% { transform: scale(1); opacity: .55; } 70%, 100% { transform: scale(2.6); opacity: 0; } }
.selects { display: flex; gap: 12px; }
.sel { display: grid; gap: 8px; }
.sel select {
  min-height: 44px; padding: 0 36px 0 12px; min-width: 140px;
  background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a7a196' stroke-width='1.75' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right 10px center / 16px;
  border: 1px solid var(--line-strong); border-radius: 0;
  font-size: 14px; color: var(--ink);
  -webkit-appearance: none; appearance: none;
}
.social { display: flex; flex-wrap: wrap; gap: 0 20px; }
.social a {
  display: inline-flex; align-items: center; gap: 6px; min-height: 44px;
  font-size: 14px; color: var(--ink-2);
  transition: color var(--t-fast) var(--ease-standard);
}
.social a .ico { width: 12px; height: 12px; }
.social a:hover { color: var(--primary); }
.legal { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 24px; font-size: 12px; color: var(--ink-3); }
.legal .num { font-size: 12px; }
.credit { font-size: 12px; }
.credit a { color: var(--ink-2); text-decoration: underline; text-underline-offset: 3px; }
.credit a:hover { color: var(--link); }

/* ---------- Entry and scramble ---------- */
.js .reveal { opacity: 0; transform: translateY(20px); transition: opacity 700ms var(--ease-expo-out), transform 700ms var(--ease-expo-out); }
.js .reveal.in { opacity: 1; transform: none; }
.scr-w { display: inline-block; white-space: nowrap; }
.scr-c { display: inline-block; text-align: center; }
.scr-g { color: var(--ink-3); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

[data-spy] { scroll-margin-top: var(--nav-h); }

/* ---------- Responsive ---------- */
@media (max-width: 1180px) {
  :root { --edge: 24px; --pad: 40px; }
  .hero-grid { grid-template-columns: minmax(0, 1fr) 480px; gap: 40px; }
  h1 { font-size: 60px; }
  .install-grid { grid-template-columns: minmax(0, 1fr) 520px; gap: 48px; }
  .how-grid { grid-template-columns: minmax(0, 1fr) 480px; gap: 48px; }
  .vrows li { grid-template-columns: 150px minmax(0, 1fr); }
  .ruler { margin-left: calc(150px + 16px); }
  .ftop { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .brand { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0 32px; align-items: end; padding-bottom: 24px; }
  .brand .news { margin-top: 0; grid-row: 1 / span 2; grid-column: 2; }
  .mid { grid-template-columns: minmax(0, 1fr) auto; }
  .social { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  :root { --section: 104px; }
  .links, .hide-sm { display: none; }
  .burger { display: block; }
  .bar { grid-template-columns: minmax(0, 1fr) auto; }
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 48px; padding-top: 40px; }
  .hero-copy { max-width: 620px; }
  .scrim {
    background:
      linear-gradient(180deg, color-mix(in srgb, var(--bg) 88%, transparent) 0%, color-mix(in srgb, var(--bg) 70%, transparent) 45%, color-mix(in srgb, var(--bg) 40%, transparent) 100%);
  }
  h1 { font-size: 56px; }
  h2 { font-size: 42px; }
  .install-grid { grid-template-columns: minmax(0, 1fr); gap: 48px; }
  .how-grid { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .how-copy { display: contents; }
  .how-intro { order: 1; padding-bottom: 40px; }
  .how-aside { order: 2; position: sticky; top: 12px; z-index: 1; padding-bottom: 8px; background: var(--bg); }
  .steps { order: 3; }
  .sticky { position: static; padding-bottom: 0; }
  .foot { display: none; }
  .vh { padding: 10px 14px; }
  .plot { padding: 8px 14px 8px; }
  .vrows li { min-height: 30px; }
  .vt { height: 10px; }
  .vt .tag, .vt .delta { bottom: auto; top: -1px; left: auto; right: 0; transform: none; }
  .ruler { display: none; }
  .viz .example { padding: 6px 14px 8px; }
  .step { min-height: 56vh; padding-top: 32px; }
  .step:last-child { min-height: 70vh; }
  .num-btn { top: 26px; }
  .ftop { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .pre-statement { font-size: 44px; }
}

@media (max-width: 639px) {
  :root { --edge: 0px; --pad: 20px; --section: 88px; }
  body { font-size: 17px; }
  .hero-grid, .hero-band, .install-grid, .how-grid, .foot-body, .pre-inner { border-inline: 0; }
  .hero-grid { padding-top: 32px; padding-bottom: 40px; }
  .hero-copy .label { margin-bottom: 20px; }
  h1 { font-size: 44px; }
  h2 { font-size: 34px; }
  .body, .lede, .step p { font-size: 17px; }
  .cta-row .btn { flex: 1 1 auto; }
  .chip { display: flex; }
  .chip code { flex: 1; font-size: 13px; }
  .wf { padding: 4px 12px 10px; }
  .wf li { grid-template-columns: 78px minmax(0, 1fr) 30px; gap: 8px; font-size: 11px; }
  .wf .op { display: none; }
  .tc-meta, .tc-detail, .tc-timing, .tracecard .example { padding-left: 12px; padding-right: 12px; }
  .tc-detail div { grid-template-columns: 84px minmax(0, 1fr); font-size: 11px; }
  .hero-band { gap: 20px; min-height: 64px; }
  .deck-panel { font-size: 13px; padding: 16px; min-height: 0; }
  .deck-file, .deck-example { padding-left: 16px; padding-right: 16px; }
  .vrows li { grid-template-columns: 112px minmax(0, 1fr); gap: 10px; }
  .vl { font-size: 11px; }
  .step { padding-left: 60px; }
  .step h3 { font-size: 26px; }
  .pre-inner { padding-top: 80px; padding-bottom: 80px; gap: 32px; }
  .pre-statement { font-size: 36px; }
  .pre-actions { width: 100%; }
  .pre-actions .btn { flex: 1 1 auto; }
  .foot-body { padding-top: 48px; }
  .ftop { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .brand { display: block; padding-bottom: 32px; }
  .brand .news { margin-top: 28px; }
  .news-row { max-width: none; }
  .col { border-top: 1px solid var(--line); }
  .col:last-of-type { border-bottom: 1px solid var(--line); }
  .col h2 button { min-height: 52px; padding: 0; cursor: pointer; }
  .col .chev { display: block; }
  .col h2 button[aria-expanded="true"] .chev { transform: rotate(180deg); }
  .panel-wrap { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 260ms var(--ease-standard); }
  .panel-wrap.open { grid-template-rows: 1fr; }
  .panel-wrap > div { overflow: hidden; }
  .col ul { gap: 0; padding-bottom: 8px; }
  .col li a { display: flex; align-items: center; min-height: 40px; }
  .mid { grid-template-columns: minmax(0, 1fr); margin-top: 32px; gap: 20px; }
  .selects .sel { flex: 1; }
  .sel select { min-width: 0; width: 100%; }
  .legal { flex-direction: column; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 1ms !important; animation-delay: 0ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; transition-delay: 0ms !important; }
  .dot::after { display: none; }
  .js .reveal { opacity: 1; transform: none; }
  .menu, .menu-open .menu { clip-path: none; opacity: 0; transition: opacity 150ms linear, visibility 0s linear 150ms !important; }
  .menu-open .menu { opacity: 1; transition: opacity 150ms linear, visibility 0s !important; }
  .menu-links a, .menu-foot { transform: none; opacity: 1; }
}