/* Tokens: room_prd/visual/tokens.json + 05b_brand.md. Dark lacquer is the only theme. */
:root {
  --bg0: #0B0506; --bg1: #170B0C; --s2: #241113; --s3: #321719; --s4: #40201F;
  --line: #3E2420; --line-strong: #5A3A2C; --gold-line: #C9973F;
  --red400: #E0243F; --red500: #C8102E; --red600: #B00E28; --red700: #8A0B1D; --red800: #5E0712;
  --gold300: #F6DFA0; --gold400: #E8C36A; --gold600: #B08530;
  --text: #F7EEDC; --text2: #CDBB9E; --muted: #9C8872; --ink: #1A0D0A;
  --card: #FBF7EE; --card-edge: #D9CFBA;
  --foil: linear-gradient(180deg, #FFF1C8 0%, #F2D27E 30%, #DDAE50 52%, #C7923A 54%, #E4BA5E 80%, #F4D993 100%);
  --satin: linear-gradient(180deg, #FBE7B0, #E8C36A 55%, #C9973F);
  --display: "Playfair Display", Georgia, serif;
  --ui: Inter, "Segoe UI", Roboto, Arial, sans-serif;
  --r: 14px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg1); color: var(--text); font: 400 16px/1.55 var(--ui);
  /* Lattice at 5% (brand: 4-12%): page color layered over the tile at 95%. */
  background-image: linear-gradient(rgba(23, 11, 12, .95), rgba(23, 11, 12, .95)), url("assets/hui_lattice_tile.svg");
  background-size: auto, 32px;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--gold400); }
h1, h2 { font-family: var(--display); font-weight: 800; line-height: 1.1; margin: 0 0 .5em; }
h1 { font-size: clamp(36px, 7vw, 64px); }
h2 { font-size: clamp(28px, 4.5vw, 42px); text-align: center; }
h3 { font-size: 18px; margin: 0 0 .4em; }
.foil { background: var(--foil); -webkit-background-clip: text; background-clip: text; color: transparent; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.muted { color: var(--muted); }
section { padding: clamp(56px, 9vw, 110px) 16px; max-width: 1120px; margin: 0 auto; }
.lead { color: var(--text2); font-size: 18px; max-width: 34em; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: 12px; font-weight: 700; color: var(--gold400); margin: 0 0 16px; }
.fine { color: var(--muted); font-size: 13px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 24px; border-radius: 999px; border: 0; cursor: pointer;
  font: 700 16px/1 var(--ui); text-decoration: none; transition: transform .15s, filter .15s;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(1px) scale(.98); }
.btn:focus-visible, .tab:focus-visible, input:focus-visible, .back:focus-visible { outline: 2px solid var(--gold400); outline-offset: 3px; }
.btn-red { background: var(--red600); color: var(--text); box-shadow: inset 0 1px 0 rgba(255,255,255,.15); }
.btn-gold { background: var(--satin); color: var(--ink); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--line-strong); }
.btn-sm { min-height: 40px; padding: 0 18px; font-size: 14px; }

/* Header */
.bar {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px; background: rgba(23, 11, 12, .88); backdrop-filter: blur(10px);
}
.bar-logo img { height: 28px; width: auto; }
.bar-nav { display: flex; align-items: center; gap: 18px; }
.bar-nav > a:not(.btn) { color: var(--text2); text-decoration: none; font-weight: 600; font-size: 14px; }
.bar-nav > a:not(.btn):hover { color: var(--text); }
.lang { background: none; border: 1px solid var(--line-strong); color: var(--text2); border-radius: 8px; padding: 6px 9px; font: 700 12px var(--ui); cursor: pointer; }
.band { position: absolute; left: 0; right: 0; bottom: -12px; height: 12px; background: url("assets/hui_band_tile.svg") repeat-x; background-size: auto 12px; opacity: .55; pointer-events: none; }
@media (max-width: 640px) { .bar-nav > a:not(.btn) { display: none; } }

/* Hero */
.hero { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; padding-top: clamp(40px, 7vw, 90px); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 14px; }
@media (max-width: 880px) { .hero { grid-template-columns: 1fr; } .hero-copy { text-align: center; } .lead { margin-inline: auto; } .hero-cta { justify-content: center; } }

/* Felt */
.felt {
  --fc: #16624F; --fm: #0F4F40; --fe: #08322A; --fo: #CFEFE2;
  position: relative; aspect-ratio: 5 / 4; border-radius: 48% / 42%;
  background: radial-gradient(ellipse at 50% 45%, var(--fc), var(--fm) 55%, var(--fe));
  border: 14px solid #2A1512; box-shadow: 0 0 0 3px #1C0E0C, 0 0 0 4px rgba(176,133,48,.7), 0 30px 60px rgba(0,0,0,.55);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
  transition: background .5s;
}
.felt-cinnabar { --fc: #7A1824; --fm: #5C1119; --fe: #360910; --fo: #FFD9C8; }
.felt-ink { --fc: #24476E; --fm: #1A3350; --fe: #0E1D30; --fo: #D6E6F7; }
.felt-plum { --fc: #5A2A5F; --fm: #42193F; --fe: #240C24; --fo: #F0DDF2; }
.felt-overlay {
  display: flex; flex-direction: column; align-items: center; order: 1;
  font: 700 clamp(10px, 1.6vw, 13px)/1.45 var(--ui); letter-spacing: .06em; color: var(--fo); opacity: .3;
  font-variant-numeric: tabular-nums; pointer-events: none; z-index: 0;
}
.board, .hand { display: flex; gap: 8px; z-index: 1; }
.board { min-height: 76px; order: 0; }
.hand { gap: 10px; order: 2; }
.hand-label { position: absolute; bottom: 5%; font: 700 13px var(--ui); color: var(--gold400); min-height: 1em; z-index: 1; }
.stage-actions { display: flex; justify-content: center; align-items: center; gap: 18px; margin-top: 22px; flex-wrap: wrap; }
.stage-hint { text-align: center; color: var(--muted); font-size: 13px; margin: 8px 0 0; }
.toggle { display: inline-flex; gap: 8px; align-items: center; color: var(--text2); font-size: 14px; cursor: pointer; }
.toggle input { accent-color: var(--gold400); width: 18px; height: 18px; }

/* Cards (DOM tilt per 05_visual.md §11) */
.card { position: relative; width: var(--w, 52px); aspect-ratio: 5 / 7; perspective: calc(var(--w, 52px) * 7); }
.card.hero { --w: clamp(72px, 12vw, 96px); touch-action: none; }
.card-inner {
  position: absolute; inset: 0; border-radius: 9%/6.4%; background: var(--card); border: 1px solid var(--card-edge);
  overflow: hidden; transform-style: preserve-3d; will-change: transform;
}
.card-shadow { position: absolute; inset: 4% 3% -3%; border-radius: 10%; background: rgba(0,0,0,.45); filter: blur(6px); will-change: transform; }
.card .rank { position: absolute; left: 8%; top: 3%; font: 800 calc(var(--w, 52px) * .3)/1.05 var(--ui); letter-spacing: -.04em; }
.card .pip { position: absolute; left: 7%; top: 30%; width: 26%; }
.card .big { position: absolute; right: 8%; bottom: 7%; width: 48%; }
.card .glare {
  position: absolute; width: 200%; height: 200%; left: -50%; top: -50%; pointer-events: none; opacity: 0; will-change: transform, opacity;
  background: radial-gradient(circle, rgba(255,255,255,.7) 0%, rgba(255,255,255,.28) 14%, rgba(255,255,255,0) 30%, rgba(60,20,0,0) 38%, rgba(60,20,0,.12) 50%, rgba(60,20,0,0) 62%);
  mix-blend-mode: soft-light;
}
.card.deal { animation: deal .45s cubic-bezier(.2,.9,.25,1.15) both; }
@keyframes deal { from { transform: translate(0, -120px) rotate(-12deg) scale(.6); opacity: 0; } }

/* Modes */
.tabs { display: flex; justify-content: center; gap: 8px; margin: 28px 0; flex-wrap: wrap; }
.tab {
  display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 18px; border-radius: 999px;
  background: var(--s2); border: 1px solid var(--line); color: var(--text2); font: 700 15px var(--ui); cursor: pointer;
}
.tab svg, .fair svg { width: 22px; height: 22px; }
.tab[aria-selected="true"] { background: var(--red600); color: var(--text); border-color: var(--red600); }
.mode-panel { max-width: 640px; margin: 0 auto; background: var(--s2); border: 1px solid var(--line); border-radius: var(--r); padding: 26px 28px; }
.mode-panel ul { margin: 0; padding-left: 20px; color: var(--text2); }
.mode-panel li { margin: 6px 0; }
.mode-panel li::marker { color: var(--gold400); }

/* Code */
.code { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center; }
.code h2 { text-align: left; }
.code-copy p { color: var(--text2); }
.code-form { display: flex; gap: 10px; flex-wrap: wrap; }
.code-form input {
  flex: 1 1 220px; min-height: 56px; border-radius: 12px; border: 1px solid var(--line-strong); background: var(--s3);
  color: var(--gold400); font: 800 24px var(--ui); letter-spacing: .12em; text-align: center; font-variant-numeric: tabular-nums;
}
.code-form input::placeholder { color: #6B5B4C; }
.code-msg { flex-basis: 100%; margin: 4px 0 0; min-height: 1.4em; font-size: 14px; color: var(--text2); }
@media (max-width: 760px) { .code { grid-template-columns: 1fr; text-align: center; } .code h2 { text-align: center; } }

/* Backs */
.backs .lead { margin: 0 auto 30px; text-align: center; }
.backs-row { display: flex; gap: 16px; overflow-x: auto; padding: 10px 4px 20px; scroll-snap-type: x mandatory; justify-content: safe center; }
.back { flex: 0 0 auto; width: 110px; background: none; border: 2px solid transparent; border-radius: 12px; padding: 4px; cursor: pointer; scroll-snap-align: center; transition: transform .2s; }
.back:hover { transform: translateY(-6px) rotate(-2deg); }
.back[aria-pressed="true"] { border-color: var(--gold400); }
.back img { width: 100%; border-radius: 8px; }

/* Fair */
.fair-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; margin-top: 30px; }
.fair article { background: var(--s2); border: 1px solid var(--line); border-radius: var(--r); padding: 22px; }
.fair article svg { color: var(--gold400); margin-bottom: 10px; }
.fair p { color: var(--text2); margin: 0; font-size: 15px; }

/* Final */
.final { text-align: center; }
.final .jar { margin: 0 auto 18px; cursor: pointer; border-radius: 28px; }
.final .jar.shake { animation: shake .6s; }
@keyframes shake { 20% { transform: rotate(-8deg); } 40% { transform: rotate(7deg); } 60% { transform: rotate(-4deg); } 80% { transform: rotate(2deg); } }
.coin { position: fixed; width: 22px; height: 22px; border-radius: 50%; pointer-events: none; z-index: 20; border: 3px dashed rgba(255,255,255,.8); }

.foot { text-align: center; padding: 40px 16px 60px; border-top: 1px solid var(--line); color: var(--text2); font-size: 13px; }
.foot img { margin: 0 auto 14px; }
.foot p { max-width: 42em; margin: 6px auto; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card.deal, .final .jar.shake { animation: none; }
  .back:hover { transform: none; }
}

@media (max-width: 480px) {
  .board .card { --w: 44px; }
  .board { gap: 5px; }
  .felt { aspect-ratio: 1 / 1.1; }
  .code-form input { flex-basis: 100%; min-width: 0; font-size: 20px; }
  .code-form .btn { flex: 1; }
}