:root {
  color-scheme: dark;
  --bg: #16191d;
  --surface: #20242a;
  --ink: #f8fafc;
  --muted: #abb4be;
  --primary: #f2a900;
  --primary-dark: #c98c00;
  --accent: #d94c4c;
  --line: #3d444d;
  --panel: #0c0e11;
  --panel-ink: #f8fafc;
  --soft: #2b3037;
  --button-ink: #081018;
  --focus: #f2a900;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.24);
  --radius: 22px;
  --page: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body.test-is-open { overflow: hidden; }
a { color: inherit; }
button, input { font: inherit; }
button { color: inherit; }
img, svg { display: block; }
::selection { background: var(--accent); color: #101014; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 12000;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--bg);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: relative;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(18px);
}
.site-header__inner {
  width: min(calc(100% - 40px), var(--page));
  min-height: 82px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.brand {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}
.brand img { flex: 0 0 auto; border-radius: 11px; }
.brand__words { display: grid; line-height: 1.15; }
.brand__words strong { font-size: 0.98rem; letter-spacing: -0.015em; }
.brand__words small { margin-top: 4px; color: var(--muted); font-size: 0.72rem; }
.primary-nav { display: flex; align-items: center; gap: 8px; }
.primary-nav a {
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
  text-decoration: none;
}
.primary-nav a:hover, .primary-nav a[aria-current="page"] { background: var(--soft); color: var(--ink); }

.home-main, .content-main, .legal-main {
  width: min(calc(100% - 40px), var(--page));
  margin: 0 auto;
}
.hero {
  min-height: 650px;
  padding: 76px 0 70px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.86fr);
  align-items: center;
  gap: clamp(38px, 7vw, 96px);
}
.eyebrow, .section-index, .panel-kicker {
  margin: 0 0 16px;
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  line-height: 1.3;
  text-transform: uppercase;
}
.hero__copy h1, .content-hero h1, .legal-hero h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(3.25rem, 7vw, 6.6rem);
  font-weight: 760;
  letter-spacing: -0.065em;
  line-height: 0.96;
}
.hero__lead {
  max-width: 680px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.7vw, 1.28rem);
  line-height: 1.65;
}
.hero__actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 12px; }
.button {
  min-height: 48px;
  padding: 12px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 760;
  line-height: 1.2;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}
.button:hover { transform: translateY(-2px); }
.button--primary { border-color: var(--primary); background: var(--primary); color: var(--button-ink); }
.button--primary:hover { border-color: var(--primary-dark); background: var(--primary-dark); }
.button--secondary { border-color: var(--line); background: transparent; color: var(--ink); }
.button--secondary:hover { border-color: var(--primary); }
.hero__microcopy { margin: 18px 0 0; color: var(--muted); font-size: 0.9rem; }
.hero__microcopy span { color: var(--primary); font-weight: 900; }

.hero-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4vw, 46px);
  border-radius: 34px;
  background: var(--panel);
  color: var(--panel-ink);
  box-shadow: var(--shadow);
}
.hero-panel::before {
  content: "";
  position: absolute;
  inset: -25% -30% auto auto;
  width: 70%;
  aspect-ratio: 1;
  border: 1px solid color-mix(in srgb, var(--accent) 60%, transparent);
  border-radius: 50%;
  opacity: 0.45;
}
.hero-panel__visual { position: relative; height: 190px; margin-bottom: 32px; }
.screen-map {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--panel-ink) 34%, transparent);
  border-radius: 18px;
}
.screen-map span { border: 0.5px solid color-mix(in srgb, var(--panel-ink) 20%, transparent); }
.screen-map span:nth-child(5) { background: var(--accent); box-shadow: 0 0 35px var(--accent); }
.scan-line {
  position: absolute;
  top: 11%;
  bottom: 11%;
  left: 50%;
  width: 1px;
  background: var(--primary);
  box-shadow: 0 0 18px var(--primary);
}
.hero-panel .panel-kicker { color: var(--accent); }
.hero-panel h2 { position: relative; max-width: 520px; margin: 0; font-size: clamp(1.7rem, 3vw, 2.6rem); line-height: 1.08; letter-spacing: -0.035em; }
.hero-panel > p:not(.panel-kicker) { position: relative; margin: 18px 0 0; color: color-mix(in srgb, var(--panel-ink) 82%, transparent); }
.panel-list { position: relative; margin: 30px 0 0; padding: 0; display: grid; gap: 0; list-style: none; }
.panel-list li {
  padding: 15px 0;
  display: grid;
  grid-template-columns: 52px 0.75fr 1.25fr;
  gap: 12px;
  align-items: baseline;
  border-top: 1px solid color-mix(in srgb, var(--panel-ink) 18%, transparent);
}
.panel-list li > span { color: var(--accent); font-family: ui-monospace, monospace; font-size: 0.75rem; font-weight: 800; }
.panel-list strong { font-size: 0.92rem; }
.panel-list small { color: color-mix(in srgb, var(--panel-ink) 82%, transparent); font-size: 0.78rem; }

.tool-workspace { padding: 110px 0; border-top: 1px solid var(--line); }
.section-heading { max-width: 760px; margin-bottom: 48px; }
.section-heading h2, .accuracy-note h2, .content-body h2, .content-aside h2, .legal-copy h2 {
  margin: 0;
  font-size: clamp(2.1rem, 4.5vw, 4.1rem);
  line-height: 1.04;
  letter-spacing: -0.05em;
}
.section-heading > p:not(.section-index) { max-width: 680px; margin: 18px 0 0; color: var(--muted); font-size: 1.05rem; }
.section-heading--compact h2 { font-size: clamp(2rem, 3.5vw, 3.3rem); }
.test-key { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 8px; }
.test-key span { padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 0.76rem; }
.test-safety { max-width: 620px !important; margin-top: 14px !important; color: var(--muted); font-size: 0.8rem !important; }
.test-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.test-card {
  width: 100%;
  min-height: 280px;
  padding: 24px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  text-align: left;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}
.test-card:hover { z-index: 2; border-color: var(--primary); box-shadow: var(--shadow); transform: translateY(-5px); }
.test-card__number { position: absolute; top: 20px; right: 22px; color: var(--muted); font-family: ui-monospace, monospace; font-size: 0.72rem; }
.test-card__icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--soft);
  color: var(--primary);
}
.test-card__icon svg { width: 25px; height: 25px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.test-card__icon svg path[d^="M4 4h6"] { fill: currentColor; stroke: none; }
.test-card__copy { margin-top: 30px; display: grid; }
.test-card__copy small { color: var(--primary); font-size: 0.7rem; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; }
.test-card__copy strong { margin-top: 5px; font-size: 1.3rem; line-height: 1.2; letter-spacing: -0.025em; }
.test-card__copy > span { margin-top: 12px; color: var(--muted); font-size: 0.9rem; line-height: 1.55; }
.test-card__launch { margin-top: auto; padding-top: 22px; color: var(--ink); font-size: 0.78rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; }
.test-card__launch span { color: var(--primary); }
.test-card--featured { background: var(--panel); color: var(--panel-ink); }
.test-card--featured .test-card__number, .test-card--featured .test-card__copy > span { color: color-mix(in srgb, var(--panel-ink) 82%, transparent); }
.test-card--featured .test-card__copy small, .test-card--featured .test-card__launch, .test-card--featured .test-card__launch span { color: var(--accent); }
.test-card--featured .test-card__icon { background: color-mix(in srgb, var(--panel-ink) 10%, transparent); color: var(--accent); }

.ad-placement { min-height: 120px; margin: 0 0 70px; display: grid; place-items: center; border: 1px dashed var(--line); color: var(--muted); }
.ad-placement > span { font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; }
.adsbygoogle { display: block; width: 100%; }

.method { padding: 100px 0; display: grid; grid-template-columns: minmax(240px, 0.7fr) minmax(0, 1.3fr); gap: clamp(50px, 9vw, 120px); border-top: 1px solid var(--line); }
.method__steps { margin: 0; padding: 0; list-style: none; counter-reset: method; }
.method__steps li { padding: 28px 0; display: grid; grid-template-columns: 54px 140px 1fr; gap: 22px; border-top: 1px solid var(--line); }
.method__steps li:last-child { border-bottom: 1px solid var(--line); }
.method__steps span { color: var(--primary); font-family: ui-monospace, monospace; font-size: 0.78rem; font-weight: 800; }
.method__steps h3 { margin: 0; font-size: 1.12rem; }
.method__steps p { margin: 0; color: var(--muted); font-size: 0.94rem; }

.accuracy-note {
  margin: 30px 0 120px;
  padding: clamp(30px, 5vw, 60px);
  display: grid;
  grid-template-columns: 70px 1fr auto;
  align-items: center;
  gap: 28px;
  border-radius: calc(var(--radius) + 8px);
  background: var(--panel);
  color: var(--panel-ink);
}
.accuracy-note__mark { width: 62px; height: 62px; display: grid; place-items: center; border: 1px solid var(--accent); border-radius: 50%; color: var(--accent); font-size: 1.8rem; }
.accuracy-note .section-index { margin-bottom: 9px; color: var(--accent); }
.accuracy-note h2 { font-size: clamp(1.75rem, 3.2vw, 2.8rem); }
.accuracy-note p:last-child { max-width: 720px; margin: 14px 0 0; color: color-mix(in srgb, var(--panel-ink) 82%, transparent); }
.accuracy-note a { color: var(--accent); font-weight: 800; text-decoration: none; white-space: nowrap; }

.faq { padding: 0 0 120px; display: grid; grid-template-columns: minmax(230px, 0.62fr) minmax(0, 1.38fr); gap: clamp(45px, 8vw, 110px); }
.faq__list { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { padding: 24px 0; display: flex; justify-content: space-between; gap: 28px; cursor: pointer; font-size: 1.05rem; font-weight: 750; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary span { color: var(--primary); font-size: 1.35rem; transition: transform 160ms ease; }
.faq details[open] summary span { transform: rotate(45deg); }
.faq details p { max-width: 720px; margin: -5px 0 24px; color: var(--muted); }

.site-footer { border-top: 1px solid var(--line); }
.site-footer__inner { width: min(calc(100% - 40px), var(--page)); margin: 0 auto; padding: 54px 0 34px; display: grid; grid-template-columns: 1fr auto; gap: 36px; }
.footer-brand strong { font-size: 1rem; }
.footer-brand p { max-width: 500px; margin: 6px 0 0; color: var(--muted); font-size: 0.84rem; }
.site-footer nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 20px; }
.site-footer nav a { color: var(--muted); font-size: 0.84rem; text-decoration: none; }
.site-footer nav a:hover { color: var(--primary); }
.footer-fineprint { grid-column: 1 / -1; margin: 12px 0 0; padding-top: 24px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.75rem; }

.content-main, .legal-main { padding-bottom: 110px; }
.content-hero, .legal-hero { padding: 88px 0 70px; border-bottom: 1px solid var(--line); }
.content-hero h1, .legal-hero h1 { max-width: 1050px; font-size: clamp(3.1rem, 6vw, 5.8rem); }
.content-hero > p:last-child, .legal-hero > p:not(.eyebrow) { max-width: 760px; margin: 28px 0 0; color: var(--muted); font-size: 1.14rem; }
.legal-hero > span { display: inline-block; margin-top: 22px; color: var(--muted); font-size: 0.8rem; }
.content-grid { padding-top: 80px; display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(270px, 0.55fr); gap: clamp(50px, 9vw, 120px); }
.content-body { min-width: 0; }
.content-body > section { padding: 0 0 76px; }
.content-body h2 { margin-bottom: 26px; font-size: clamp(2rem, 4vw, 3.4rem); }
.content-body section > p:not(.section-index) { max-width: 780px; margin: 0 0 18px; color: var(--muted); font-size: 1.03rem; }
.content-aside { align-self: start; position: sticky; top: 24px; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.content-aside h2 { font-size: 1.25rem; letter-spacing: -0.02em; }
.content-aside ul { margin: 18px 0 24px; padding: 0; display: grid; gap: 12px; list-style: none; }
.content-aside li { padding-left: 20px; position: relative; color: var(--muted); font-size: 0.9rem; }
.content-aside li::before { content: ""; position: absolute; top: 0.7em; left: 0; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.aside-callout { margin: 24px -4px; padding: 20px; border-radius: 14px; background: var(--soft); }
.aside-callout strong { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; }
.aside-callout p { margin: 8px 0 0; color: var(--muted); font-size: 0.82rem; }
.content-aside .button { width: 100%; }
.compact-test-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.compact-test-list > div { padding: 18px; display: flex; gap: 14px; align-items: flex-start; border: 1px solid var(--line); border-radius: 15px; background: var(--surface); }
.compact-test-list .test-card__icon { width: 38px; height: 38px; flex: 0 0 auto; border-radius: 11px; }
.compact-test-list .test-card__icon svg { width: 20px; height: 20px; }
.compact-test-list p { margin: 0 !important; display: grid; }
.compact-test-list strong { color: var(--ink); font-size: 0.9rem; }
.compact-test-list small { margin-top: 5px; color: var(--muted); font-size: 0.76rem; line-height: 1.45; }
.principle-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.principle-grid > div { padding: 22px; border-top: 3px solid var(--primary); background: var(--surface); }
.principle-grid h3 { margin: 0; font-size: 1rem; }
.principle-grid p { margin: 8px 0 0 !important; color: var(--muted); font-size: 0.86rem !important; }

.legal-document { padding-top: 70px; display: grid; grid-template-columns: 220px minmax(0, 800px); justify-content: space-between; gap: clamp(50px, 9vw, 120px); }
.legal-toc { align-self: start; position: sticky; top: 24px; display: grid; gap: 8px; }
.legal-toc strong { margin-bottom: 9px; font-size: 0.76rem; letter-spacing: 0.08em; text-transform: uppercase; }
.legal-toc a { padding: 6px 0; color: var(--muted); font-size: 0.87rem; text-decoration: none; }
.legal-toc a:hover { color: var(--primary); }
.legal-copy section { scroll-margin-top: 24px; padding: 0 0 42px; }
.legal-copy h2 { margin-bottom: 16px; font-size: clamp(1.35rem, 2.4vw, 1.85rem); letter-spacing: -0.03em; }
.legal-copy p { margin: 0 0 14px; color: var(--muted); }
.legal-copy a { color: var(--primary); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.error-main { width: min(calc(100% - 40px), 780px); min-height: 70vh; margin: 0 auto; padding: 100px 0; display: flex; flex-direction: column; justify-content: center; }
.error-code { margin: 0; color: var(--primary); font: 800 0.8rem ui-monospace, monospace; letter-spacing: 0.12em; }
.error-main h1 { margin: 10px 0 0; font-size: clamp(3rem, 8vw, 6rem); line-height: 1; letter-spacing: -0.06em; }
.error-main > p:not(.error-code) { max-width: 600px; margin: 24px 0 0; color: var(--muted); font-size: 1.08rem; }
.noscript-note { position: fixed; right: 16px; bottom: 16px; z-index: 100; max-width: 420px; padding: 14px 16px; border: 1px solid #f0a000; border-radius: 10px; background: #fff5cd; color: #302900; font-size: 0.84rem; }

/* Full-screen test workspace */
.test-stage { position: fixed; inset: 0; z-index: 10000; display: none; overflow: hidden; background: #000; color: #111; }
.test-stage.is-active { display: block; }
.test-stage__surface { position: absolute; inset: 0; overflow: hidden; background: #000; }
.test-stage__chrome { position: fixed; top: max(16px, env(safe-area-inset-top)); left: 50%; z-index: 10002; width: min(calc(100vw - 24px), 940px); transform: translateX(-50%); transition: opacity 180ms ease; }
.stage-controls { padding: 10px 12px 10px 18px; display: flex; align-items: center; justify-content: space-between; gap: 18px; border: 1px solid rgba(17, 24, 39, 0.16); border-radius: 18px; background: rgba(255, 255, 255, 0.94); color: #111827; box-shadow: 0 14px 44px rgba(0, 0, 0, 0.22); backdrop-filter: blur(14px); }
.stage-controls__heading { min-width: 116px; display: grid; line-height: 1.2; }
.stage-controls__heading strong { font-size: 0.88rem; }
.stage-controls__heading small { margin-top: 3px; color: #667085; font-size: 0.69rem; }
.stage-controls__options { display: flex; flex-wrap: wrap; justify-content: flex-end; align-items: center; gap: 7px; }
.stage-button { min-height: 36px; padding: 7px 12px; border: 1px solid #d1d5db; border-radius: 9px; background: #fff; color: #111827; cursor: pointer; font-size: 0.78rem; font-weight: 750; }
.stage-button:hover { border-color: #6b7280; background: #f3f4f6; }
.stage-button:focus-visible { outline: 3px solid #111827; outline-offset: 2px; box-shadow: 0 0 0 5px rgba(255, 255, 255, .92); }
.stage-button--next { border-color: #111827; background: #111827; color: #fff; }
.stage-button--close { border-color: #c92a2a; background: #d63333; color: #fff; }
.stage-value { min-width: 88px; color: #374151; font-size: 0.76rem; font-weight: 800; text-align: center; }
.test-stage__instruction { position: fixed; left: 50%; bottom: max(18px, env(safe-area-inset-bottom)); z-index: 10002; max-width: min(760px, calc(100vw - 24px)); margin: 0; padding: 11px 16px; border: 1px solid rgba(17, 24, 39, 0.14); border-radius: 12px; background: rgba(255, 255, 255, 0.94); color: #111827; box-shadow: 0 12px 36px rgba(0, 0, 0, 0.2); font-size: 0.82rem; text-align: center; transform: translateX(-50%); transition: opacity 180ms ease; backdrop-filter: blur(14px); }
.controls-idle { cursor: none; }
.controls-idle .test-stage__chrome, .controls-idle .test-stage__instruction { pointer-events: none; opacity: 0; }
.surface-solid, .surface-backlight { background: #000; }
.zone-overlay { position: absolute; inset: 0; display: grid; grid-template-columns: repeat(3, 1fr); opacity: 0; transition: opacity 120ms ease; }
.zone-overlay::before, .zone-overlay::after { content: ""; position: absolute; inset: 0; }
.zone-overlay::before { background-image: linear-gradient(90deg, transparent calc(33.333% - 1.5px), #fff calc(33.333% - 1.5px) calc(33.333% + 1.5px), transparent calc(33.333% + 1.5px), transparent calc(66.666% - 1.5px), #fff calc(66.666% - 1.5px) calc(66.666% + 1.5px), transparent calc(66.666% + 1.5px)), linear-gradient(0deg, transparent calc(33.333% - 1.5px), #fff calc(33.333% - 1.5px) calc(33.333% + 1.5px), transparent calc(33.333% + 1.5px), transparent calc(66.666% - 1.5px), #fff calc(66.666% - 1.5px) calc(66.666% + 1.5px), transparent calc(66.666% + 1.5px)); }
.zone-overlay::after { background-image: linear-gradient(90deg, transparent calc(33.333% - .5px), #000 calc(33.333% - .5px) calc(33.333% + .5px), transparent calc(33.333% + .5px), transparent calc(66.666% - .5px), #000 calc(66.666% - .5px) calc(66.666% + .5px), transparent calc(66.666% + .5px)), linear-gradient(0deg, transparent calc(33.333% - .5px), #000 calc(33.333% - .5px) calc(33.333% + .5px), transparent calc(33.333% + .5px), transparent calc(66.666% - .5px), #000 calc(66.666% - .5px) calc(66.666% + .5px), transparent calc(66.666% + .5px)); }
.zone-overlay.is-visible { opacity: 1; }
.sweep-layer { position: absolute; inset: 0; display: none; background: #fff; animation: luminance-sweep 3.2s ease-in-out infinite; }
.has-sweep .sweep-layer { display: block; }
.sweep-paused .sweep-layer { animation-play-state: paused; }
@keyframes luminance-sweep { 0%, 100% { opacity: .16; } 50% { opacity: .96; } }
.pattern-field { position: absolute; inset: 0; background-color: #fff; }
.pattern-horizontal { background: repeating-linear-gradient(0deg, #000 0 2px, #fff 2px 4px); }
.pattern-vertical { background: repeating-linear-gradient(90deg, #000 0 2px, #fff 2px 4px); }
.pattern-grid { background-color: #fff; background-image: repeating-linear-gradient(0deg, #000 0 1px, transparent 1px 20px), repeating-linear-gradient(90deg, #000 0 1px, transparent 1px 20px); }
.pattern-checker { background-image: repeating-conic-gradient(#000 0 25%, #fff 0 50%); background-size: 40px 40px; }
.surface-sharpness { background: #fff; }
.sharpness-canvas { position: absolute; inset: 0; }
.surface-contrast { display: grid; place-items: center; padding: 110px 24px 88px; background: #171717; }
.contrast-board { width: min(1100px, 100%); display: grid; gap: 26px; }
.contrast-group h2 { margin: 0 0 9px; color: #fff; font: 700 0.8rem ui-monospace, monospace; letter-spacing: 0.08em; text-transform: uppercase; }
.contrast-steps { display: grid; grid-template-columns: repeat(10, minmax(0, 1fr)); }
.contrast-steps span { min-height: clamp(80px, 15vh, 150px); display: grid; place-items: end center; padding: 7px 2px; font: 600 0.65rem ui-monospace, monospace; }
.surface-grayscale { display: grid; place-items: center; padding: 110px 24px 88px; background: #171717; }
.grayscale-board { width: min(1200px, 100%); color: #fff; }
.grayscale-board > p { margin: 16px 0 8px; font: 700 0.78rem ui-monospace, monospace; letter-spacing: 0.08em; text-transform: uppercase; }
.grayscale-steps { height: clamp(100px, 22vh, 210px); display: grid; grid-template-columns: repeat(32, 1fr); }
.grayscale-ramp { height: clamp(100px, 22vh, 210px); background: linear-gradient(90deg, #000, #fff); }
.surface-color-ramps { display: grid; place-items: center; padding: 105px 24px 82px; background: #111; }
.color-ramp-board { width: min(1100px, 100%); display: grid; gap: 10px; }
.color-ramp { display: grid; grid-template-columns: 82px 1fr; align-items: center; gap: 14px; }
.color-ramp > span { color: #fff; font: 700 0.72rem ui-monospace, monospace; text-align: right; text-transform: uppercase; }
.color-ramp__field { height: clamp(45px, 9vh, 90px); }
.surface-motion { display: grid; place-items: center; background: #0a0a0c; }
.motion-track { position: relative; width: min(1300px, 88vw); height: clamp(90px, 18vh, 170px); overflow: hidden; border-top: 1px solid #444; border-bottom: 1px solid #444; background: repeating-linear-gradient(90deg, transparent 0 99px, #232323 99px 100px); }
.motion-target { --motion-duration: 2.8s; position: absolute; top: 16%; bottom: 16%; left: 0; aspect-ratio: 1.25; display: grid; grid-template-columns: repeat(3, 1fr); border: 2px solid #fff; background: #fff; animation: motion-pass var(--motion-duration) linear infinite alternate; will-change: transform; }
.motion-target span:nth-child(1) { background: #ff2d2d; }
.motion-target span:nth-child(2) { background: #fff; }
.motion-target span:nth-child(3) { background: #2d7dff; }
.motion-target.is-paused { animation-play-state: paused; }
@keyframes motion-pass { from { transform: translateX(0); } to { transform: translateX(calc(min(1300px, 88vw) - 100%)); } }
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; border: 0 !important; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }


.layout-graywolf .site-header { border-bottom: 2px solid var(--primary); }
.layout-graywolf h1, .layout-graywolf h2 { text-transform: uppercase; }
.layout-graywolf .hero { grid-template-columns: minmax(0, 1.15fr) minmax(360px, .85fr); }
.layout-graywolf .hero-panel { border: 1px solid var(--line); border-radius: 4px; box-shadow: 16px 16px 0 #0b0d0f; clip-path: polygon(0 0, 94% 0, 100% 8%, 100% 100%, 6% 100%, 0 92%); }
.layout-graywolf .test-grid { grid-template-columns: repeat(12, 1fr); }
.layout-graywolf .test-card { grid-column: span 4; border-radius: 4px; clip-path: polygon(0 0, 96% 0, 100% 7%, 100% 100%, 0 100%); }
.layout-graywolf .test-card--featured { grid-column: span 8; min-height: 360px; }
.layout-graywolf .test-card:nth-child(4), .layout-graywolf .test-card:nth-child(7) { grid-column: span 8; }
.layout-graywolf .test-card__icon { border-radius: 2px; }
.layout-graywolf .test-card:focus-visible { outline-offset: -6px; }
.layout-graywolf .accuracy-note { border-radius: 4px; border-left: 7px solid var(--primary); }
@media (max-width: 980px) { .layout-graywolf .test-card, .layout-graywolf .test-card:nth-child(4), .layout-graywolf .test-card:nth-child(7) { grid-column: span 6; } .layout-graywolf .test-card--featured { grid-column: span 12; } }
@media (max-width: 680px) { .layout-graywolf .test-card, .layout-graywolf .test-card:nth-child(4), .layout-graywolf .test-card:nth-child(7), .layout-graywolf .test-card--featured { grid-column: 1 / -1; } }


@media (max-width: 980px) {
  .site-header__inner { min-height: 76px; }
  .brand__words small { display: none; }
  body[class*="layout-"] .hero { min-height: auto; grid-template-columns: 1fr; padding: 64px 0; }
  .hero__copy { max-width: 780px; }
  .hero-panel { max-width: 760px; }
  .test-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .method, .faq, .content-grid, .legal-document { grid-template-columns: 1fr; }
  .content-aside, .legal-toc { position: static; }
  .legal-toc { padding-bottom: 28px; display: flex; flex-wrap: wrap; gap: 6px 18px; border-bottom: 1px solid var(--line); }
  .legal-toc strong { width: 100%; }
  .accuracy-note { grid-template-columns: 64px 1fr; }
  .accuracy-note > a { grid-column: 2; justify-self: start; }
}

@media (max-width: 680px) {
  .site-header__inner, .home-main, .content-main, .legal-main, .site-footer__inner { width: min(calc(100% - 28px), var(--page)); }
  .site-header__inner { padding: 12px 0; align-items: flex-start; flex-direction: column; gap: 9px; }
  .brand img { width: 36px; height: 36px; }
  .brand__words small { display: block; }
  .primary-nav { width: 100%; overflow-x: auto; padding-bottom: 2px; }
  .primary-nav a { flex: 0 0 auto; padding: 6px 9px; font-size: 0.82rem; }
  body[class*="layout-"] .hero { padding: 50px 0 58px; gap: 42px; }
  .hero__copy h1, .content-hero h1, .legal-hero h1 { font-size: clamp(2.7rem, 14vw, 4.2rem); }
  .hero__lead { font-size: 1rem; }
  .hero__actions { align-items: stretch; flex-direction: column; }
  .hero__actions .button { width: 100%; }
  .hero-panel { padding: 24px; border-radius: 24px; }
  .hero-panel__visual { height: 145px; }
  .panel-list li { grid-template-columns: 42px 1fr; }
  .panel-list small { grid-column: 2; }
  .layout-enact .panel-list small { grid-column: 1; }
  .tool-workspace { padding: 76px 0; }
  .test-grid { grid-template-columns: 1fr; }
  .test-card { min-height: 250px; }
  .method { padding: 76px 0; gap: 30px; }
  .method__steps li { grid-template-columns: 36px 1fr; gap: 10px 14px; }
  .method__steps p { grid-column: 2; }
  .accuracy-note { margin-bottom: 86px; padding: 28px; grid-template-columns: 1fr; }
  .accuracy-note__mark { width: 52px; height: 52px; }
  .accuracy-note > a { grid-column: 1; white-space: normal; }
  .faq { padding-bottom: 86px; gap: 26px; }
  .site-footer__inner { grid-template-columns: 1fr; }
  .site-footer nav { justify-content: flex-start; }
  .content-hero, .legal-hero { padding: 58px 0 48px; }
  .content-grid, .legal-document { padding-top: 50px; gap: 34px; }
  .compact-test-list, .principle-grid { grid-template-columns: 1fr; }
  .content-body > section { padding-bottom: 56px; }
  .stage-controls { padding: 10px; align-items: stretch; flex-direction: column; gap: 8px; border-radius: 14px; }
  .stage-controls__heading { display: flex; justify-content: space-between; }
  .stage-controls__options { justify-content: flex-start; }
  .stage-button { min-height: 34px; padding: 6px 9px; }
  .stage-value { min-width: 64px; }
  .test-stage__instruction { font-size: 0.76rem; }
  .contrast-steps { grid-template-columns: repeat(5, 1fr); }
  .contrast-steps span { min-height: 54px; }
  .grayscale-steps { grid-template-columns: repeat(16, 1fr); }
  .grayscale-steps span { min-height: 42px; }
  .color-ramp { grid-template-columns: 58px 1fr; gap: 8px; }
  .color-ramp > span { font-size: 0.62rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, .test-card, .faq summary span, .zone-overlay { transition: none; }
  .layout-invoke .hero-panel::after { animation: none; }
}

@media (max-height: 500px) {
  .test-stage__chrome { top: 6px; }
  .stage-controls { padding: 6px 8px 6px 12px; gap: 8px; }
  .stage-controls__heading small { display: none; }
  .stage-button { min-height: 30px; padding: 4px 8px; }
  .test-stage__instruction { bottom: 6px; padding: 6px 10px; font-size: .7rem; }
  .surface-contrast, .surface-grayscale, .surface-color-ramps { padding: 62px 12px 42px; }
  .contrast-board { gap: 8px; }
  .contrast-group h2, .grayscale-board > p { margin: 4px 0; }
  .contrast-steps span { min-height: 34px; }
  .grayscale-steps, .grayscale-ramp { height: min(20vh, 54px); }
  .color-ramp-board { gap: 4px; }
  .color-ramp__field { height: min(8vh, 34px); }
}