/*
 * AtlasAR website design system (AR-172). One file: tokens, base, layout, components, pages.
 * Same brand as the plugin admin (--atlas-ar-brand #0e6b5c). Rules in SITE-DESIGN-SYSTEM.md.
 *
 *   Tokens   --ar-*  (colour, type, space, radius, shadow, motion). Legacy names (--ink, --line,
 *            --accent …) stay as aliases: docs.css, search.css and blog.css read them.
 *   Layout   .wrap .section .section-head .grid-2/3/4 .split
 *   Parts    .btn .chip .badge .card .stage .viewer-frame .qr-card .tile .model-card .filters
 *            .search-field .stat .steps .logo-row .cta .feedback .code .tabs .table
 */
:root {
  /* colour: neutrals */
  --ar-canvas: #f6f7f5; --ar-surface: #ffffff; --ar-surface-2: #f0f3f1; --ar-surface-3: #e7ece9;
  --ar-line: #e1e6e3; --ar-line-strong: #c9d2ce;
  --ar-ink: #0d1815; --ar-ink-2: #2f3d39; --ar-muted: #55635f; --ar-subtle: #7d8a86;
  /* colour: brand + signals */
  --ar-brand: #0e6b5c; --ar-brand-strong: #0a5649; --ar-brand-ink: #ffffff; --ar-brand-ground: #e5f2ee; --ar-brand-soft: #9fd0c3;
  --ar-glow: #34e0b4; --ar-violet: #7c6cf2; --ar-sky: #3fb5f0;
  --ar-pro: #b45309; --ar-pro-ground: #fdf0dc;
  --ar-ok: #0e7a43; --ar-danger: #b42318;
  /* colour: the dark "AR stage" */
  --ar-night: #060c0b; --ar-night-2: #0c1715; --ar-night-3: #13221f; --ar-night-line: rgba(255, 255, 255, .09);
  --ar-night-ink: #eef5f2; --ar-night-muted: #9fb3ad;
  /* type */
  --ar-font: "Inter", "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", sans-serif;
  --ar-font-display: "Inter Tight", "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  --ar-mono: ui-monospace, SFMono-Regular, "Cascadia Code", Menlo, Consolas, monospace;
  --ar-t-xs: 12px; --ar-t-sm: 14px; --ar-t-md: 16px; --ar-t-lg: 18px; --ar-t-xl: 21px;
  --ar-t-h3: 20px; --ar-t-h2: clamp(28px, 3.6vw, 42px); --ar-t-h1: clamp(38px, 6vw, 68px);
  /* space (4-point) */
  --ar-s1: 4px; --ar-s2: 8px; --ar-s3: 12px; --ar-s4: 16px; --ar-s5: 20px; --ar-s6: 24px; --ar-s8: 32px; --ar-s10: 40px; --ar-s12: 48px; --ar-s16: 64px; --ar-s20: 80px; --ar-s24: 96px;
  /* shape + depth + motion */
  --ar-r-sm: 8px; --ar-r-md: 12px; --ar-r-lg: 18px; --ar-r-xl: 26px; --ar-r-pill: 999px;
  --ar-shadow-sm: 0 1px 2px rgba(13, 24, 21, .06), 0 1px 1px rgba(13, 24, 21, .04);
  --ar-shadow-md: 0 10px 30px -12px rgba(13, 24, 21, .18), 0 2px 6px rgba(13, 24, 21, .05);
  --ar-shadow-lg: 0 40px 80px -30px rgba(6, 12, 11, .45), 0 10px 24px -12px rgba(6, 12, 11, .25);
  --ar-ease: cubic-bezier(.2, .7, .2, 1); --ar-fast: .15s; --ar-slow: .4s;
  --ar-wrap: 1180px;

  /* legacy aliases (pages written before AR-172, docs.css, search.css) */
  --bg: var(--ar-canvas); --card: var(--ar-surface); --ink: var(--ar-ink); --muted: var(--ar-muted); --line: var(--ar-line);
  --accent: var(--ar-brand); --accent-ink: var(--ar-brand-ink); --accent-soft: var(--ar-brand-ground); --ok: var(--ar-ok);
  --dark: var(--ar-night-2); --dark-ink: var(--ar-night-ink); --radius: var(--ar-r-lg);
  --display: var(--ar-font-display); --text: var(--ar-font);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ar-canvas: #0a110f; --ar-surface: #111a18; --ar-surface-2: #16211e; --ar-surface-3: #1c2926;
    --ar-line: #23312d; --ar-line-strong: #33453f;
    --ar-ink: #edf3f1; --ar-ink-2: #cfdad6; --ar-muted: #a3b2ad; --ar-subtle: #7c8c87;
    --ar-brand: #4fd1b0; --ar-brand-strong: #7de0c6; --ar-brand-ink: #04110d; --ar-brand-ground: #12302a; --ar-brand-soft: #1f5a4d;
    --ar-pro: #f6b766; --ar-pro-ground: #3a2a12; --ar-ok: #5ad69a; --ar-danger: #ff8a7a;
    --ar-shadow-sm: 0 1px 2px rgba(0, 0, 0, .4); --ar-shadow-md: 0 12px 30px -12px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}

/* ---------------------------------------------------------------- base */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--ar-canvas); color: var(--ar-ink); font: var(--ar-t-md)/1.6 var(--ar-font); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
h1, h2, h3, h4 { font-family: var(--ar-font-display); color: var(--ar-ink); letter-spacing: -.02em; text-wrap: balance; }
h1 { font-size: var(--ar-t-h1); line-height: 1.02; letter-spacing: -.035em; margin: 0 0 var(--ar-s5); font-weight: 750; }
h2 { line-height: 1.12; }
p { text-wrap: pretty; }
a { color: var(--ar-brand); text-underline-offset: 3px; }
img, svg, video { max-width: 100%; }
a[href], button, [role="button"], [role="tab"], summary, select, label[for],
input[type="checkbox"], input[type="radio"], input[type="file"] { cursor: pointer; }
button:disabled, [aria-disabled="true"], input:disabled, select:disabled { cursor: not-allowed; }
:focus-visible { outline: 3px solid var(--ar-brand); outline-offset: 3px; border-radius: 4px; }
::selection { background: var(--ar-brand-ground); }
.wrap { max-width: var(--ar-wrap); margin: 0 auto; padding: 0 var(--ar-s4); }
@media (min-width: 720px) { .wrap { padding: 0 var(--ar-s6); } }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.muted { color: var(--ar-muted); }
code.inline, .doc code.inline { font: .9em var(--ar-mono); background: var(--ar-surface-2); color: var(--ar-ink); padding: 1px 6px; border-radius: 6px; border: 1px solid var(--ar-line); }

/* ---------------------------------------------------------------- header (markup from the core layout) */
header.top { position: sticky; top: 0; z-index: 50; padding: 12px 0; background: color-mix(in srgb, var(--ar-canvas) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px); border-bottom: 1px solid transparent; }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: var(--ar-s4); }
@supports not (background: color-mix(in srgb, red 50%, blue)) { header.top { background: var(--ar-canvas); } }
.brand { display: inline-flex; align-items: center; gap: 10px; font-family: var(--ar-font-display); font-size: 18px; font-weight: 750; letter-spacing: -.02em; color: var(--ar-ink); text-decoration: none; white-space: nowrap; }
.brand::before { content: ""; width: 30px; height: 30px; border-radius: 9px; flex: none; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .18), 0 6px 14px -6px rgba(14, 107, 92, .7); }
.brand::before { background:
  url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath d='M15 6.5 22.5 10.8v8.4L15 23.5l-7.5-4.3v-8.4z' fill='none' stroke='%23fff' stroke-width='1.8' stroke-linejoin='round'/%3E%3Cpath d='M7.6 10.9 15 15.1l7.4-4.2M15 15.1v8.3' fill='none' stroke='%23fff' stroke-opacity='.75' stroke-width='1.6' stroke-linejoin='round'/%3E%3C/svg%3E") center / 30px no-repeat,
  linear-gradient(140deg, #19a68d, #0e6b5c 55%, #0a4a40); }
nav.links { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
nav.links a { color: var(--ar-ink-2); text-decoration: none; font-size: 15px; font-weight: 500; padding: 7px 11px; border-radius: var(--ar-r-sm); transition: background var(--ar-fast), color var(--ar-fast); }
nav.links a:hover { background: var(--ar-surface-2); color: var(--ar-ink); }
nav.links a[aria-current="page"] { color: var(--ar-ink); font-weight: 650; background: var(--ar-surface-2); }
nav.links a.signin { margin-left: 6px; color: var(--ar-brand-ink); background: var(--ar-ink); font-weight: 650; padding: 8px 14px; border-radius: var(--ar-r-md); }
nav.links a.signin:hover { background: var(--ar-brand); }
nav.links .search-open { margin: 0 2px 0 6px; }
@media (max-width: 1000px) { nav.links .opt { display: none; } }
@media (max-width: 640px) {
  nav.links { gap: 0; }
  nav.links a { font-size: 14px; padding: 6px 8px; }
  nav.links a.hide-sm { display: none; }
  nav.links a.signin { padding: 7px 10px; }
  .brand { font-size: 16px; }
}
@media (max-width: 420px) { .brand { font-size: 0; gap: 0; } }

/* ---------------------------------------------------------------- buttons, chips, badges */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 20px; border-radius: var(--ar-r-md);
  font: 650 15.5px/1 var(--ar-font); letter-spacing: -.005em; text-decoration: none; border: 1px solid transparent; cursor: pointer;
  transition: transform var(--ar-fast) var(--ar-ease), background var(--ar-fast), box-shadow var(--ar-fast), border-color var(--ar-fast); white-space: nowrap; }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--ar-brand); color: var(--ar-brand-ink); box-shadow: 0 8px 20px -10px rgba(14, 107, 92, .8), inset 0 1px 0 rgba(255, 255, 255, .15); }
.btn.primary:hover { background: var(--ar-brand-strong); }
.btn.secondary, .btn.ghost { background: var(--ar-surface); color: var(--ar-ink); border-color: var(--ar-line-strong); }
.btn.secondary:hover, .btn.ghost:hover { border-color: var(--ar-ink); }
.btn.quiet { background: transparent; color: var(--ar-ink); padding: 0 8px; }
.btn.quiet:hover { color: var(--ar-brand); }
.btn.sm { min-height: 36px; padding: 0 14px; font-size: 14px; border-radius: var(--ar-r-sm); }
.btn.lg { min-height: 54px; padding: 0 26px; font-size: 16.5px; }
.btn .arrow { transition: transform var(--ar-fast) var(--ar-ease); }
.btn:hover .arrow { transform: translateX(3px); }
.on-dark .btn.primary, .btn.glow { background: var(--ar-glow); color: #03140f; box-shadow: 0 10px 30px -10px rgba(52, 224, 180, .7); }
.on-dark .btn.primary:hover, .btn.glow:hover { background: #6cf0cd; }
.on-dark .btn.secondary, .on-dark .btn.ghost { background: rgba(255, 255, 255, .06); color: var(--ar-night-ink); border-color: rgba(255, 255, 255, .2); }
.on-dark .btn.secondary:hover, .on-dark .btn.ghost:hover { border-color: rgba(255, 255, 255, .55); }
.actions { display: flex; flex-wrap: wrap; gap: var(--ar-s3); align-items: center; }

.chip { display: inline-flex; align-items: center; gap: 6px; min-height: 34px; padding: 0 13px; border-radius: var(--ar-r-pill); border: 1px solid var(--ar-line-strong);
  background: var(--ar-surface); color: var(--ar-ink-2); font: 550 14px/1 var(--ar-font); cursor: pointer; transition: all var(--ar-fast); }
.chip:hover { border-color: var(--ar-ink); color: var(--ar-ink); }
.chip[aria-pressed="true"], .chip[aria-selected="true"], .chip.is-on { background: var(--ar-ink); color: var(--ar-canvas); border-color: var(--ar-ink); }
.chip .n { font-size: 12px; opacity: .65; }
.badge { display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border-radius: var(--ar-r-pill); font: 650 12px/1.3 var(--ar-font); letter-spacing: .01em;
  background: var(--ar-surface-2); color: var(--ar-ink-2); border: 1px solid var(--ar-line); white-space: nowrap; }
.badge.brand { background: var(--ar-brand-ground); color: var(--ar-brand); border-color: transparent; }
.badge.pro { background: var(--ar-pro-ground); color: var(--ar-pro); border-color: transparent; }
.badge.free { background: var(--ar-brand-ground); color: var(--ar-brand); border-color: transparent; }
.on-dark .badge { background: rgba(255, 255, 255, .07); color: var(--ar-night-ink); border-color: var(--ar-night-line); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ar-glow); box-shadow: 0 0 0 4px rgba(52, 224, 180, .18); display: inline-block; }

/* ---------------------------------------------------------------- sections */
.section { padding: var(--ar-s20) 0; }
.section.tight { padding: var(--ar-s12) 0; }
.section.alt { background: var(--ar-surface); border-block: 1px solid var(--ar-line); }
.section-head { max-width: 720px; margin: 0 0 var(--ar-s10); }
.section-head.center { margin-inline: auto; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font: 700 13px/1 var(--ar-font); letter-spacing: .08em; text-transform: uppercase; color: var(--ar-brand); margin: 0 0 var(--ar-s4); }
.section-head h2, h2.title { font-size: var(--ar-t-h2); margin: 0 0 var(--ar-s4); }
.section-head p, .sub { color: var(--ar-muted); font-size: var(--ar-t-lg); margin: 0; max-width: 62ch; }
.lede { font-size: clamp(17px, 2vw, 20px); line-height: 1.55; color: var(--ar-muted); margin: 0 0 var(--ar-s8); max-width: 58ch; }
.grid-2, .grid-3, .grid-4 { display: grid; gap: var(--ar-s5); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 980px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: var(--ar-s12); align-items: center; }
.split.flip > :first-child { order: 2; }
@media (max-width: 900px) { .split { grid-template-columns: minmax(0, 1fr); gap: var(--ar-s8); } .split.flip > :first-child { order: 0; } }

/* ---------------------------------------------------------------- cards */
.card { background: var(--ar-surface); border: 1px solid var(--ar-line); border-radius: var(--ar-r-lg); box-shadow: var(--ar-shadow-sm); }
.card.pad, .feature, .step { padding: var(--ar-s6); }
.card.lift { transition: transform var(--ar-slow) var(--ar-ease), box-shadow var(--ar-slow) var(--ar-ease), border-color var(--ar-fast); }
.card.lift:hover { transform: translateY(-3px); box-shadow: var(--ar-shadow-md); border-color: var(--ar-line-strong); }
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--ar-s5); }
@media (max-width: 900px) { .features { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .features { grid-template-columns: 1fr; } }
.icon { width: 42px; height: 42px; border-radius: var(--ar-r-md); display: grid; place-items: center; background: var(--ar-brand-ground); color: var(--ar-brand); flex: none; }
.icon svg { width: 21px; height: 21px; }
.feature h3, .step h3, .card h3 { font-size: 18px; line-height: 1.3; margin: var(--ar-s4) 0 6px; letter-spacing: -.015em; }
.feature p, .step p, .card p { margin: 0; color: var(--ar-muted); font-size: 15px; }
.feature .tagline { display: inline-flex; margin-top: var(--ar-s4); }
.feature .tagline:not(.badge) { font: 650 12.5px/1.3 var(--ar-font); color: var(--ar-brand); background: var(--ar-brand-ground); border-radius: var(--ar-r-pill); padding: 3px 10px; }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--ar-s5); counter-reset: s; }
@media (max-width: 800px) { .steps { grid-template-columns: 1fr; } }
.step { counter-increment: s; position: relative; }
.step::before { content: "0" counter(s); font: 750 13px/1 var(--ar-mono); color: var(--ar-brand); background: var(--ar-brand-ground); padding: 7px 9px; border-radius: var(--ar-r-sm); display: inline-block; }

/* ---------------------------------------------------------------- the dark AR stage (hero, showcases) */
.stage { position: relative; isolation: isolate; color: var(--ar-night-ink); background: var(--ar-night); overflow: hidden; }
.stage::before { content: ""; position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(900px 520px at 72% 38%, rgba(52, 224, 180, .16), transparent 60%),
    radial-gradient(700px 420px at 12% 0%, rgba(124, 108, 242, .14), transparent 60%),
    radial-gradient(600px 400px at 95% 100%, rgba(63, 181, 240, .10), transparent 60%),
    linear-gradient(180deg, var(--ar-night-2), var(--ar-night)); }
/* The AR floor grid: perspective lines under the model, fading out. */
.stage::after { content: ""; position: absolute; left: -20%; right: -20%; bottom: -10%; height: 55%; z-index: -1; transform: perspective(600px) rotateX(62deg); transform-origin: bottom;
  background-image: linear-gradient(rgba(255, 255, 255, .07) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .07) 1px, transparent 1px);
  background-size: 56px 56px; -webkit-mask-image: linear-gradient(to top, #000 10%, transparent 85%); mask-image: linear-gradient(to top, #000 10%, transparent 85%); }
.stage h1, .stage h2, .stage h3 { color: #fff; }
.stage .lede, .stage p { color: var(--ar-night-muted); }
.stage .eyebrow { color: var(--ar-glow); }
.stage a:not(.btn) { color: var(--ar-glow); }
.hero { padding: var(--ar-s16) 0 var(--ar-s20); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr); gap: var(--ar-s10); align-items: center; }
@media (max-width: 960px) { .hero-grid { grid-template-columns: minmax(0, 1fr); } }
.hero h1 .glow-text { background: linear-gradient(100deg, #7ff3d2 0%, #34e0b4 35%, #6fc6ff 75%, #a99cff 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .note { margin: var(--ar-s4) 0 0; font-size: 14px; color: var(--ar-night-muted); display: flex; gap: 18px; flex-wrap: wrap; }
.hero .note span::before { content: "✓"; color: var(--ar-glow); font-weight: 800; margin-right: 6px; }
.pill-link { display: inline-flex; align-items: center; gap: 10px; padding: 5px 14px 5px 6px; border-radius: var(--ar-r-pill); border: 1px solid var(--ar-night-line);
  background: rgba(255, 255, 255, .05); color: var(--ar-night-ink) !important; text-decoration: none; font-size: 14px; font-weight: 550; margin-bottom: var(--ar-s6); }
.pill-link b { background: var(--ar-glow); color: #04140f; border-radius: var(--ar-r-pill); padding: 3px 9px; font-size: 12px; }
.pill-link:hover { border-color: rgba(255, 255, 255, .3); }

/* A 3D viewer in a frame: the SDK's <atlasar-viewer> fills it. */
.viewer-frame { position: relative; border-radius: var(--ar-r-xl); overflow: hidden; background: radial-gradient(120% 90% at 50% 15%, #ffffff 0%, #eef2f0 60%, #e2e8e5 100%); border: 1px solid var(--ar-line); }
.viewer-frame.dark { background: radial-gradient(110% 80% at 50% 25%, rgba(255, 255, 255, .09), rgba(255, 255, 255, .02) 60%, transparent 100%); border-color: var(--ar-night-line); box-shadow: var(--ar-shadow-lg), inset 0 1px 0 rgba(255, 255, 255, .06); }
.viewer-frame atlasar-viewer { display: block; }
.viewer-frame .frame-bar { position: absolute; left: 14px; right: 14px; top: 14px; display: flex; justify-content: space-between; align-items: center; gap: 8px; pointer-events: none; z-index: 2; }
.viewer-frame .frame-bar > * { pointer-events: auto; }
.viewer-frame .hint { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); font-size: 12.5px; color: var(--ar-muted); background: color-mix(in srgb, var(--ar-surface) 85%, transparent); border: 1px solid var(--ar-line); padding: 5px 12px; border-radius: var(--ar-r-pill); white-space: nowrap; pointer-events: none; z-index: 2; }
.viewer-frame.dark .hint { color: var(--ar-night-muted); background: rgba(6, 12, 11, .6); border-color: var(--ar-night-line); }
.viewer-skeleton { display: grid; place-items: center; height: 100%; min-height: 240px; color: var(--ar-subtle); font-size: 14px; }
.measure { position: absolute; right: 18px; top: 50%; transform: translateY(-50%); display: grid; justify-items: center; gap: 6px; font: 650 12px/1 var(--ar-mono); color: var(--ar-night-muted); pointer-events: none; z-index: 2; }
.measure i { width: 1px; height: 140px; background: linear-gradient(var(--ar-glow), transparent); }

/* Model picker on the hero */
.picker { display: flex; gap: 8px; flex-wrap: wrap; margin-top: var(--ar-s4); }
.picker button { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px 6px 6px; border-radius: var(--ar-r-pill); border: 1px solid var(--ar-night-line); background: rgba(255, 255, 255, .04);
  color: var(--ar-night-ink); font: 550 13.5px/1 var(--ar-font); cursor: pointer; transition: all var(--ar-fast); }
.picker button img, .picker button .sw { width: 26px; height: 26px; border-radius: 50%; object-fit: cover; background: rgba(255, 255, 255, .12); display: grid; place-items: center; font-size: 13px; }
.picker button[aria-pressed="true"] { border-color: var(--ar-glow); background: rgba(52, 224, 180, .12); }
.picker button:hover { border-color: rgba(255, 255, 255, .35); }

/* QR card (AR on your phone) */
.qr-card { display: flex; align-items: center; gap: var(--ar-s4); padding: var(--ar-s4); border-radius: var(--ar-r-lg); background: rgba(255, 255, 255, .05); border: 1px solid var(--ar-night-line); }
.qr-card .qr { width: 84px; height: 84px; border-radius: 10px; background: #fff; padding: 6px; flex: none; display: grid; place-items: center; }
.qr-card .qr img, .qr-card .qr svg, .qr-card .qr canvas { width: 100%; height: 100%; display: block; }
.qr-card strong { display: block; color: #fff; font-size: 15px; }
.qr-card span { font-size: 13.5px; color: var(--ar-night-muted); }

/* Proof row */
.proof-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--ar-line); border: 1px solid var(--ar-line); border-radius: var(--ar-r-lg); overflow: hidden; }
@media (max-width: 760px) { .proof-row { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.stat { background: var(--ar-surface); padding: var(--ar-s6); }
.stat strong { display: block; font: 750 clamp(26px, 3vw, 34px)/1.1 var(--ar-font-display); letter-spacing: -.03em; color: var(--ar-ink); }
.stat span { font-size: 14px; color: var(--ar-muted); }
.platforms { display: flex; flex-wrap: wrap; gap: 10px 28px; align-items: center; color: var(--ar-subtle); font: 650 15px/1 var(--ar-font-display); letter-spacing: -.01em; }
.platforms span { display: inline-flex; align-items: center; gap: 8px; }
.platforms svg { width: 18px; height: 18px; opacity: .8; }

/* ---------------------------------------------------------------- example tiles + showcase */
.tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--ar-s5); }
@media (max-width: 980px) { .tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .tiles { grid-template-columns: minmax(0, 1fr); } }
.tile { display: flex; flex-direction: column; overflow: hidden; color: inherit; text-decoration: none; }
.tile .tile-view { aspect-ratio: 4 / 3; position: relative; background: radial-gradient(110% 90% at 50% 20%, #fff, #eaefec); border-bottom: 1px solid var(--ar-line); }
@media (prefers-color-scheme: dark) { .tile .tile-view, .viewer-frame:not(.dark) { background: radial-gradient(110% 90% at 50% 20%, #1d2a27, #111a18); } }
.tile .tile-view atlasar-viewer, .tile .tile-view img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.tile .tile-body { padding: var(--ar-s5); display: grid; gap: 6px; }
.tile h3 { margin: 0; font-size: 17px; }
.tile p { margin: 0; color: var(--ar-muted); font-size: 14.5px; }
.tile .tile-meta { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 4px; }

.showcase { scroll-margin-top: 90px; padding: var(--ar-s12) 0; border-top: 1px solid var(--ar-line); }
.showcase:first-of-type { border-top: 0; }
.showcase .split { align-items: start; }
.showcase h2 { font-size: clamp(24px, 2.8vw, 32px); margin: 0 0 var(--ar-s3); }
.showcase .use { margin: var(--ar-s4) 0 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.showcase .use li { padding-left: 26px; position: relative; color: var(--ar-ink-2); font-size: 15.5px; }
.showcase .use li::before { content: ""; position: absolute; left: 0; top: 5px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--ar-brand) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 12 5 5 9-10'/%3E%3C/svg%3E") center / 10px no-repeat; }
.showcase .code { margin-top: var(--ar-s5); }
.controls { display: flex; flex-wrap: wrap; gap: 8px; margin-top: var(--ar-s3); align-items: center; }
.controls .label { font-size: 13px; font-weight: 650; color: var(--ar-muted); margin-right: 4px; }
.swatch { width: 34px; height: 34px; border-radius: 50%; border: 2px solid var(--ar-surface); box-shadow: 0 0 0 1px var(--ar-line-strong); cursor: pointer; padding: 0; }
.swatch[aria-pressed="true"] { box-shadow: 0 0 0 2px var(--ar-ink); }
.event-log { margin-top: var(--ar-s3); font: 12.5px/1.5 var(--ar-mono); color: var(--ar-muted); min-height: 1.5em; }
.toc-strip { position: sticky; top: 62px; z-index: 20; background: color-mix(in srgb, var(--ar-canvas) 88%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--ar-line); }
.toc-strip .wrap { display: flex; gap: 6px; overflow-x: auto; padding-block: 10px; scrollbar-width: none; }
.toc-strip a { flex: none; text-decoration: none; }

/* ---------------------------------------------------------------- free models */
.search-field { position: relative; flex: 1; min-width: 220px; }
.search-field input { width: 100%; min-height: 50px; padding: 0 16px 0 46px; font: 16px var(--ar-font); color: var(--ar-ink); background: var(--ar-surface);
  border: 1px solid var(--ar-line-strong); border-radius: var(--ar-r-md); box-shadow: var(--ar-shadow-sm); }
.search-field input:focus-visible { outline: 3px solid color-mix(in srgb, var(--ar-brand) 45%, transparent); outline-offset: 0; border-color: var(--ar-brand); }
.search-field svg { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); width: 18px; height: 18px; color: var(--ar-subtle); pointer-events: none; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin: var(--ar-s4) 0 var(--ar-s6); }
.library-bar { display: flex; gap: var(--ar-s3); flex-wrap: wrap; align-items: center; }
.library-bar select { min-height: 50px; padding: 0 14px; border-radius: var(--ar-r-md); border: 1px solid var(--ar-line-strong); background: var(--ar-surface); color: var(--ar-ink); font: 15px var(--ar-font); }
.result-line { color: var(--ar-muted); font-size: 14px; margin: 0 0 var(--ar-s4); min-height: 1.5em; }
.model-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: var(--ar-s5); }
.model-card { overflow: hidden; display: flex; flex-direction: column; color: inherit; text-decoration: none; }
.model-card .thumb { aspect-ratio: 1; background: radial-gradient(110% 90% at 50% 20%, #fff, #e9eeeb); display: grid; place-items: center; position: relative; border-bottom: 1px solid var(--ar-line); }
@media (prefers-color-scheme: dark) { .model-card .thumb { background: radial-gradient(110% 90% at 50% 20%, #1d2a27, #111a18); } }
.model-card .thumb img { width: 86%; height: 86%; object-fit: contain; transition: transform var(--ar-slow) var(--ar-ease); }
.model-card:hover .thumb img { transform: scale(1.05) rotate(-1.5deg); }
.model-card .thumb .badge { position: absolute; left: 12px; top: 12px; }
.model-card .body { padding: var(--ar-s4); display: grid; gap: 4px; }
.model-card h3 { margin: 0; font-size: 16px; }
.model-card .meta { font-size: 13px; color: var(--ar-muted); display: flex; gap: 10px; flex-wrap: wrap; }
.empty { text-align: center; padding: var(--ar-s16) var(--ar-s4); color: var(--ar-muted); border: 1px dashed var(--ar-line-strong); border-radius: var(--ar-r-lg); }
.empty h3 { margin: 0 0 6px; }
.model-page { padding: var(--ar-s10) 0 var(--ar-s16); }
.crumbs { font-size: 14px; color: var(--ar-muted); margin: 0 0 var(--ar-s5); display: flex; gap: 8px; flex-wrap: wrap; }
.crumbs a { color: inherit; text-decoration: none; }
.crumbs a:hover { color: var(--ar-ink); }
.spec { display: grid; grid-template-columns: auto 1fr; gap: 10px 20px; margin: var(--ar-s6) 0; font-size: 15px; }
.spec dt { color: var(--ar-muted); }
.spec dd { margin: 0; font-weight: 550; }
.tags { display: flex; gap: 6px; flex-wrap: wrap; }

/* ---------------------------------------------------------------- feedback (every page) */
.feedback { margin: var(--ar-s16) 0 0; padding: var(--ar-s6); display: grid; gap: var(--ar-s4); }
.feedback .row { display: flex; flex-wrap: wrap; gap: var(--ar-s3); align-items: center; justify-content: space-between; }
.feedback h2 { font-size: 18px; margin: 0; letter-spacing: -.01em; }
.feedback p { margin: 0; color: var(--ar-muted); font-size: 14.5px; }
.feedback .chips { display: flex; flex-wrap: wrap; gap: 8px; }
.feedback textarea { width: 100%; min-height: 84px; resize: vertical; padding: 12px 14px; font: 15px/1.5 var(--ar-font); color: var(--ar-ink); background: var(--ar-surface); border: 1px solid var(--ar-line-strong); border-radius: var(--ar-r-md); }
.feedback .thanks { color: var(--ar-ok); font-weight: 600; font-size: 14.5px; }
.feedback [hidden] { display: none !important; }

/* ---------------------------------------------------------------- CTA band */
.cta { border-radius: var(--ar-r-xl); padding: clamp(28px, 5vw, 56px); display: grid; grid-template-columns: minmax(0, 1.4fr) auto; gap: var(--ar-s8); align-items: center; }
@media (max-width: 800px) { .cta { grid-template-columns: minmax(0, 1fr); } }
.cta h2 { font-size: clamp(26px, 3.4vw, 38px); margin: 0 0 var(--ar-s3); }
.cta p { margin: 0; font-size: 17px; }
.band { margin-top: var(--ar-s12); padding: var(--ar-s8); display: grid; grid-template-columns: minmax(0, 1.5fr) auto; gap: var(--ar-s6); align-items: center; }
@media (max-width: 760px) { .band { grid-template-columns: 1fr; } }
.band h2 { font-size: 24px; margin: 0 0 6px; }
.band p { margin: 0; color: var(--ar-muted); }
.band.dark { background: var(--ar-night-2); color: var(--ar-night-ink); border-color: var(--ar-night-line); }
.band.dark h2 { color: #fff; }
.band.dark p { color: var(--ar-night-muted); }
.band.dark .btn.primary { background: var(--ar-glow); color: #03140f; }
.dev { padding: var(--ar-s6); display: grid; grid-template-columns: minmax(0, 1.5fr) auto; gap: var(--ar-s6); align-items: center; }
@media (max-width: 760px) { .dev { grid-template-columns: 1fr; } }
.dev h2 { font-size: 22px; margin: 0 0 6px; }
.dev p { margin: 0; color: var(--ar-muted); }

/* ---------------------------------------------------------------- pricing */
.plans { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--ar-s5); align-items: stretch; }
@media (max-width: 760px) { .plans { grid-template-columns: 1fr; } }
.plans.four { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.plan { padding: var(--ar-s8) var(--ar-s6); display: flex; flex-direction: column; }
.plan.pro { border-color: var(--ar-brand); box-shadow: 0 0 0 1px var(--ar-brand) inset, var(--ar-shadow-md); }
.plan h2, .plan h3 { font-size: 20px; margin: 0; }
.price { margin: 10px 0 4px; color: var(--ar-muted); }
.price strong { font: 750 38px/1.1 var(--ar-font-display); color: var(--ar-ink); letter-spacing: -.03em; }
.plan .fine { font-size: 13px; color: var(--ar-muted); margin: 0 0 var(--ar-s5); }
.plan ul { list-style: none; margin: 0 0 var(--ar-s6); padding: 0; display: grid; gap: 10px; flex: 1; align-content: start; }
.plan li { position: relative; padding-left: 26px; font-size: 15px; }
.plan li::before { content: ""; position: absolute; left: 0; top: 4px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--ar-brand) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 12 5 5 9-10'/%3E%3C/svg%3E") center / 10px no-repeat; }
.plan li .muted { color: var(--ar-muted); }
.plan .btn { width: 100%; }
.plan .soon-price { font-size: 15px; color: var(--ar-muted); font-weight: 600; }
.faq details { border-bottom: 1px solid var(--ar-line); padding: 16px 0; }
.faq summary { font-weight: 650; }
.faq details p { margin: 10px 0 0; color: var(--ar-muted); }
.beta-tag, .soon { display: inline-block; vertical-align: 2px; margin-left: 6px; font-size: 11px; font-weight: 700; letter-spacing: .03em; text-transform: uppercase; color: var(--ar-muted); background: var(--ar-surface-2); border-radius: var(--ar-r-pill); padding: 1px 8px; }
.beta-tag { color: var(--ar-brand); background: var(--ar-brand-ground); }

/* ---------------------------------------------------------------- footer (markup from the core layout) */
footer { margin-top: var(--ar-s16); padding: var(--ar-s10) 0 var(--ar-s12); color: var(--ar-muted); font-size: 14px; border-top: 1px solid var(--ar-line); background: var(--ar-surface); }
footer .wrap { display: flex; justify-content: space-between; gap: var(--ar-s5); flex-wrap: wrap; align-items: center; }
footer nav { display: flex; gap: 6px 20px; flex-wrap: wrap; }
footer a { color: inherit; text-decoration: none; }
footer a:hover { color: var(--ar-ink); }
footer a[aria-current="page"] { color: var(--ar-ink); font-weight: 600; }

/* ---------------------------------------------------------------- code blocks (API, SDK, examples) */
.code { background: #0b1210; color: #e6efec; border-radius: var(--ar-r-md); overflow: hidden; border: 1px solid #1d2a27; box-shadow: var(--ar-shadow-sm); }
.code-tabs { display: flex; gap: 2px; padding: 6px 6px 0; background: #111b18; flex-wrap: wrap; }
.code-tabs button { appearance: none; border: 0; background: transparent; color: #93a7a1; cursor: pointer; font: 600 13px/1 var(--ar-font); padding: 9px 12px; border-radius: 8px 8px 0 0; }
.code-tabs button[aria-selected="true"] { background: #0b1210; color: #ffffff; }
.code-tabs button:focus-visible { outline: 2px solid var(--ar-glow); outline-offset: -2px; }
.code pre { margin: 0; padding: 16px 18px; overflow-x: auto; font: 13.5px/1.65 var(--ar-mono); }
.code pre[hidden] { display: none; }
.code .c { color: #6f8580; }
.code .s { color: #8ef0c9; }
.code .k { color: #a9c7ff; }
.code-head { display: flex; justify-content: space-between; align-items: center; padding: 8px 14px; background: #111b18; font-size: 12px; color: #93a7a1; border-bottom: 1px solid #1d2a27; }
.copy-code { appearance: none; border: 1px solid #263632; background: #0b1210; color: #e6efec; border-radius: 7px; font: 600 12px var(--ar-font); padding: 5px 10px; cursor: pointer; }
.copy-code:hover { border-color: var(--ar-glow); }

/* ---------------------------------------------------------------- docs, API, tables */
.two { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 28px; align-items: start; }
@media (max-width: 860px) { .two { grid-template-columns: 1fr; } }
.table-wrap { overflow-x: auto; }
table.api { width: 100%; border-collapse: collapse; font-size: 15px; }
table.api th, table.api td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--ar-line); vertical-align: top; }
table.api th { font-size: 13px; color: var(--ar-muted); font-weight: 600; }
table.api tr:last-child td { border-bottom: 0; }
table.api td:first-child { white-space: nowrap; }
.notes { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 760px) { .notes { grid-template-columns: 1fr; } }
.notes li { padding: 18px 20px; }
.notes h3 { font-size: 16px; margin: 0 0 4px; }
.notes p { margin: 0; color: var(--ar-muted); font-size: 15px; }
.doc-grid { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 40px; align-items: start; padding-top: var(--ar-s6); }
.doc-toc { position: sticky; top: 84px; font-size: 14px; display: grid; gap: 8px; max-height: calc(100vh - 100px); overflow: auto; }
.doc-toc a { color: var(--ar-muted); text-decoration: none; }
.doc-toc a:hover { color: var(--ar-ink); }
.doc h2 { margin-top: 44px; font-size: clamp(24px, 2.6vw, 30px); }
.doc > h2:first-child { margin-top: 0; }
.doc code.inline { overflow-wrap: anywhere; }
.doc ol, .doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
@media (max-width: 860px) { .doc-grid { grid-template-columns: minmax(0, 1fr); } .doc-toc { position: static; max-height: none; } }
main > .hero:not(.stage) { padding: var(--ar-s12) 0 var(--ar-s6); }
main > .hero:not(.stage) h1 { font-size: clamp(34px, 5vw, 54px); }

/* ---------------------------------------------------------------- legal pages */
.legal { max-width: 780px; margin: 0 auto; padding: 40px 0 8px; }
.legal h1 { font-size: clamp(32px, 5vw, 44px); margin: 8px 0 8px; }
.legal .updated { color: var(--ar-muted); margin: 0 0 22px; font-size: 15px; }
.legal .summary { padding: 20px 22px; margin: 0 0 30px; }
.legal .summary h2 { font-size: 17px; margin: 0 0 8px; }
.legal .summary ul { margin: 0; padding-left: 20px; }
.legal .summary li { margin: 4px 0; }
.legal h2 { font-size: 22px; margin: 34px 0 10px; }
.legal h3 { font-size: 17px; margin: 20px 0 6px; }
.legal p, .legal li { font-size: 16px; }
.legal ul { padding-left: 22px; }
.legal li { margin: 5px 0; }
.legal table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 10px 0 6px; }
.legal th, .legal td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--ar-line); vertical-align: top; }
.legal th { font-size: 13px; color: var(--ar-muted); font-weight: 600; }
.legal .table-wrap { overflow-x: auto; background: var(--ar-surface); border: 1px solid var(--ar-line); border-radius: 12px; }
mark.fill { background: #fff3bf; color: #5c4400; padding: 0 4px; border-radius: 4px; font-weight: 600; }
@media (prefers-color-scheme: dark) { mark.fill { background: #4a3b00; color: #ffe8a3; } }

/* ---------------------------------------------------------------- the /search/ page (the dialog is search.css) */
.search-main { padding-top: 24px; padding-bottom: 64px; max-width: 760px; }
.search-page { display: flex; gap: 10px; margin: 18px 0 8px; }
.search-page input[type="search"] { flex: 1; min-width: 0; font: inherit; font-size: 18px; color: var(--ar-ink); background: var(--ar-surface); border: 1px solid var(--ar-line-strong); border-radius: 12px; padding: 12px 14px; }
.search-page input[type="search"]:focus-visible { outline: 3px solid var(--ar-brand); outline-offset: 2px; }
.search-status { color: var(--ar-muted); font-size: 14px; min-height: 1.5em; }
.search-results { padding: 0; }

/* ---------------------------------------------------------------- motion */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s var(--ar-ease), transform .6s var(--ar-ease); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .reveal { opacity: 1; transform: none; }
}
@media print { header.top, .feedback, footer, .stage::after { display: none; } .stage { background: none; color: #000; } }
@media (max-width: 420px) { .viewer-frame .frame-bar { left: 10px; right: 10px; top: 10px; } .viewer-frame .frame-bar .badge { font-size: 11px; padding: 3px 8px; } }
/* AR-174: a note box (docs.css has the same for the API reference) */
.callout { margin: 16px 0; padding: 12px 16px; border: 1px solid var(--ar-line); border-left: 3px solid var(--ar-brand); border-radius: var(--ar-r-sm); background: var(--ar-brand-ground); font-size: 15px; }