/* CypherWebex Canon — lively light theme with a dark mode.
   System UI only (offline, no CDN). Track accents: body[data-track="T1".."T8"].
   Motion is disabled under prefers-reduced-motion. */

:root {
  color-scheme: light;
  --bg: #f3f6ff;
  --bg-2: #ffffff;
  --bg-3: #e7edff;
  --ink: #16182b;
  --ink-dim: #3c4468;
  --muted: #5c657f;
  --line: rgba(22, 24, 43, 0.1);
  --line-strong: rgba(22, 24, 43, 0.2);
  --gold: #d97706;
  --gold-2: #b45309;
  --paper: #fffdf8;
  --shadow: 0 18px 50px rgba(79, 70, 229, 0.12);
  --glow: 0 10px 30px rgba(15, 155, 142, 0.28);
  --accent: #0f9b8e;
  --accent-2: #6366f1;
  --accent-ink: #042f2e;
  --t1: #0f9b8e;
  --t2: #2563eb;
  --t3: #d97706;
  --t4: #e11d48;
  --t5: #7c3aed;
  --t6: #65a30d;
  --t7: #ea580c;
  --t8: #c026d3;
  --danger: #e11d48;
  --ok: #059669;
  --radius: 18px;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
  --serif: var(--sans);
  --mono: ui-monospace, "Cascadia Code", "Segoe UI Mono", Menlo, Consolas, monospace;
  --max: 1180px;
  --read: 74ch;
  --glass: rgba(255, 255, 255, 0.72);
  --card-bg: #ffffff;
  --field: #ffffff;
  --illu-bg: #f8faff;
  --hero-ink: #0b1020;
  --mesh-a: rgba(15, 155, 142, 0.35);
  --mesh-b: rgba(99, 102, 241, 0.32);
  --mesh-c: rgba(244, 114, 182, 0.28);
  --mesh-d: rgba(245, 158, 11, 0.3);
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0e1324;
  --bg-2: #171d33;
  --bg-3: #222a46;
  --ink: #eef1ff;
  --ink-dim: #c5cceb;
  --muted: #9aa3c7;
  --line: rgba(238, 241, 255, 0.12);
  --line-strong: rgba(238, 241, 255, 0.28);
  --gold: #fbbf24;
  --gold-2: #fde68a;
  --paper: #1c1730;
  --shadow: 0 22px 50px rgba(0, 0, 0, 0.35);
  --glow: 0 10px 32px rgba(34, 211, 238, 0.25);
  --glass: rgba(18, 24, 48, 0.72);
  --card-bg: #171d33;
  --field: #101628;
  --illu-bg: #12182e;
  --hero-ink: #0b1020;
  --mesh-a: rgba(34, 211, 238, 0.22);
  --mesh-b: rgba(129, 140, 248, 0.28);
  --mesh-c: rgba(244, 114, 182, 0.2);
  --mesh-d: rgba(251, 191, 36, 0.16);
}

body[data-track="T1"] { --accent: var(--t1); --accent-2: #22d3ee; --accent-ink: #042f2e; }
body[data-track="T2"] { --accent: var(--t2); --accent-2: #38bdf8; --accent-ink: #082044; }
body[data-track="T3"] { --accent: var(--t3); --accent-2: #fbbf24; --accent-ink: #3b2204; }
body[data-track="T4"] { --accent: var(--t4); --accent-2: #fb7185; --accent-ink: #3f0614; }
body[data-track="T5"] { --accent: var(--t5); --accent-2: #c4b5fd; --accent-ink: #2e1065; }
body[data-track="T6"] { --accent: var(--t6); --accent-2: #bef264; --accent-ink: #1a2e05; }
body[data-track="T7"] { --accent: var(--t7); --accent-2: #fdba74; --accent-ink: #431407; }
body[data-track="T8"] { --accent: var(--t8); --accent-2: #f0abfc; --accent-ink: #4a044e; }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html[data-font="sm"] body { font-size: 15px; }
html[data-font="md"] body { font-size: 16.5px; }
html[data-font="lg"] body { font-size: 19px; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.6;
  background:
    radial-gradient(900px 480px at 0% -10%, var(--mesh-a), transparent 55%),
    radial-gradient(800px 420px at 100% 0%, var(--mesh-b), transparent 50%),
    radial-gradient(700px 380px at 80% 100%, var(--mesh-c), transparent 45%),
    radial-gradient(600px 320px at 10% 90%, var(--mesh-d), transparent 40%),
    var(--bg);
}
body::before {
  content: "";
  pointer-events: none;
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(99, 102, 241, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 15%, transparent 72%);
  z-index: 0;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-2); }
img, svg, video, canvas { max-width: 100%; height: auto; }
p, li, td, dd, figcaption { overflow-wrap: anywhere; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.skip {
  position: absolute;
  left: 12px;
  top: -48px;
  background: var(--paper);
  color: #1a1208;
  padding: 8px 12px;
  z-index: 80;
  border-radius: 8px;
}
.skip:focus { top: 12px; }

.wrap { width: min(var(--max), calc(100% - 24px)); margin: 0 auto; position: relative; z-index: 1; }

.readbar {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  width: 0;
  z-index: 60;
  background: linear-gradient(90deg, var(--t1), var(--t2), var(--t4), var(--t3));
  pointer-events: none;
}

.topbar {
  position: sticky;
  top: 10px;
  z-index: 40;
  width: min(var(--max), calc(100% - 16px));
  margin: 10px auto 0;
  border-radius: 22px;
  background: var(--glass);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
}
.bar-inner {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  position: relative;
  min-width: 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  min-width: 0;
  flex: 0 1 auto;
}
.brand-mark { width: 36px; height: 36px; flex: none; }
.brand-name {
  font-size: 0.98rem;
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.1;
  white-space: nowrap;
}
.brand-name small {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}
.nav-search { flex: 1 1 120px; min-width: 0; }
.nav-q, .search-row input, .cmdk-panel input, #glossary-q {
  width: 100%;
  background: var(--field);
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 10px 14px 10px 38px;
  font: inherit;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230f9b8e' stroke-width='2'><circle cx='11' cy='11' r='7'/><path d='M20 20l-3.5-3.5'/></svg>");
  background-repeat: no-repeat;
  background-position: 12px 50%;
  background-size: 16px;
}
.icon-btn, .nav-toggle {
  flex: none;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: var(--card-bg);
  color: var(--ink);
  font: inherit;
  cursor: pointer;
}
.icon-btn:hover, .nav-toggle:hover { border-color: var(--accent); box-shadow: var(--glow); }
.nav-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: min(420px, calc(100vw - 24px));
  max-height: min(70vh, 640px);
  overflow: auto;
  padding: 8px;
  border-radius: 18px;
  background: var(--glass);
  backdrop-filter: blur(18px) saturate(1.4);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
  display: grid;
  gap: 4px;
}
.nav-panel[hidden] { display: none; }
.nav-panel a {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 8px;
  align-items: center;
  text-decoration: none;
  color: var(--ink);
  min-height: 44px;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid transparent;
}
.nav-panel a:hover, .nav-panel a[aria-current="page"] {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}
.nav-ico { font-size: 1.15rem; line-height: 1; }
.nav-label { display: block; font-weight: 750; }
.nav-sub { display: block; color: var(--muted); font-size: 0.78rem; font-weight: 500; }
.private-pill { display: none; }

h1, h2, h3, h4 { font-family: var(--sans); font-weight: 750; letter-spacing: -0.03em; line-height: 1.15; }
h1 { font-size: clamp(2.1rem, 5vw, 4rem); margin: 0 0 12px; }
h2 { font-size: clamp(1.45rem, 3vw, 2rem); margin: 0 0 10px; }
h3 { font-size: 1.2rem; margin: 1.2rem 0 0.4rem; }
.kicker {
  color: var(--accent);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 800;
  margin: 0 0 8px;
}
.lede { font-size: 1.08rem; color: var(--ink-dim); max-width: 66ch; margin: 0; }
.grad-text {
  background: linear-gradient(90deg, var(--t1), var(--t2), var(--t8), var(--t3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-live {
  position: relative;
  margin: 18px 0 8px;
  padding: 28px 22px;
  border-radius: 28px;
  overflow: hidden;
  color: var(--hero-ink);
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 18px;
  align-items: center;
  background: linear-gradient(120deg, #99f6e4, #c7d2fe, #fbcfe8, #fde68a, #a5f3fc);
  background-size: 280% 280%;
  animation: mesh 16s ease infinite;
  box-shadow: var(--shadow);
}
.hero-live .lede, .hero-live .kicker { color: #1e1b4b; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.hero-stage { display: grid; gap: 10px; }
.hero-card {
  background: rgba(255, 255, 255, 0.82);
  border-radius: 16px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}
.hero-card b { display: block; }
.hero-card span { color: #433c6b; font-size: 0.88rem; }
.hero { padding: 18px 0 8px; }

a.btn, button.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(90deg, #0f9b8e, #4f46e5);
  color: #fff;
  text-decoration: none;
  border: 0;
  border-radius: 999px;
  padding: 12px 16px;
  font-weight: 750;
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.28);
}
button.ghost, a.ghost {
  background: rgba(255, 255, 255, 0.55);
  color: var(--hero-ink);
  border: 1px solid rgba(15, 23, 42, 0.15);
  border-radius: 999px;
  padding: 10px 14px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
}
.room-main button.ghost, .quiz-tools button.ghost, .study-bar button.ghost, p button.ghost, p a.ghost {
  background: var(--card-bg);
  color: var(--ink);
  border-color: var(--line-strong);
}
button.ghost:hover, a.ghost:hover { border-color: var(--accent); box-shadow: var(--glow); }

.stats, .stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 18px 0;
}
.stat {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px 16px;
  box-shadow: var(--shadow);
  border-bottom: 4px solid var(--accent);
}
.stat b { display: block; font-size: 1.8rem; color: var(--accent); letter-spacing: -0.04em; }
.stat span { color: var(--muted); font-size: 0.82rem; }

.track-map {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 8px 0 22px;
}
.track-tile {
  position: relative;
  display: block;
  text-decoration: none;
  color: var(--ink);
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 14px 14px 12px;
  min-height: 148px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.track-tile::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background: linear-gradient(90deg, var(--card), var(--accent-2, var(--card)));
}
.tile-emoji { font-size: 1.5rem; }
.tile-num {
  position: absolute;
  top: 16px;
  right: 48px;
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--card);
}
.tile-ring { position: absolute; top: 12px; right: 12px; width: 36px; height: 36px; }
.tile-ring .ring-track { fill: none; stroke: var(--line-strong); stroke-width: 3; }
.tile-ring .ring-value {
  fill: none;
  stroke: var(--card);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 94.2;
  stroke-dashoffset: 94.2;
  transform: rotate(-90deg);
  transform-origin: 18px 18px;
  transition: stroke-dashoffset 900ms ease;
}
.track-tile h3 { margin: 8px 0 4px; font-size: 1.02rem; }
.track-tile p { margin: 0; color: var(--muted); font-size: 0.85rem; }

.timeline { list-style: none; margin: 0 0 28px; padding: 0; display: grid; gap: 0; }
.plan-item {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px;
  padding: 0 0 16px 0;
  position: relative;
}
.plan-item::before {
  content: "";
  position: absolute;
  left: 112px;
  top: 8px;
  bottom: -8px;
  width: 3px;
  background: linear-gradient(var(--accent), var(--accent-2));
  border-radius: 99px;
}
.plan-item:last-child::before { display: none; }
.day {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  padding-top: 10px;
}
.plan-card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px 14px;
  box-shadow: var(--shadow);
  margin-left: 18px;
}
.plan-card a { text-decoration: none; color: var(--ink); font-weight: 750; }
.plan-card p { margin: 4px 0 0; color: var(--ink-dim); font-size: 0.92rem; }
.plan-card b {
  display: inline-grid;
  place-items: center;
  min-width: 28px;
  height: 28px;
  margin-right: 8px;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.75rem;
}

.tonight, .dash, .last-opened, .orientation {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}
.tonight h2, .dash h2 { margin-top: 0; }
.dash {
  display: grid;
  grid-template-columns: 1.2fr 1fr 160px;
  gap: 14px;
  align-items: center;
}
.og-card { display: flex; gap: 12px; align-items: center; }
.og-card img { width: 120px; border-radius: 12px; border: 1px solid var(--line); }
.og-card h3 { margin: 0 0 6px; }
.og-card p, .dash p { margin: 0; color: var(--ink-dim); }
.ring-wrap { display: grid; place-items: center; text-align: center; position: relative; }
.ring-wrap svg { width: 112px; height: 112px; }
.ring-wrap .ring-track { fill: none; stroke: var(--line-strong); stroke-width: 10; }
.ring-wrap .ring-value {
  fill: none;
  stroke: var(--accent);
  stroke-width: 10;
  stroke-linecap: round;
  stroke-dasharray: 327;
  stroke-dashoffset: 327;
  transform: rotate(-90deg);
  transform-origin: 60px 60px;
  transition: stroke-dashoffset 900ms ease;
}
.ring-wrap div { position: absolute; }
.ring-wrap b { display: block; font-size: 1.3rem; }
.ring-wrap span { color: var(--muted); font-size: 0.72rem; }
.dash-bars { list-style: none; padding: 0; margin: 0 0 22px; display: grid; gap: 8px; grid-column: 1 / -1; }
.dash-bars li { display: grid; grid-template-columns: 52px 1fr auto; gap: 10px; align-items: center; }
.bar { height: 8px; background: var(--bg-3); border-radius: 99px; overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: var(--accent); border-radius: 99px; transition: width 900ms ease; }

.search-row { display: flex; gap: 12px; align-items: center; margin: 8px 0 18px; }
.search-row input { flex: 1; padding: 14px 18px 14px 46px; background-position: 16px 50%; }
.search-meta { color: var(--muted); font-size: 0.85rem; min-width: 0; text-align: right; }
.empty-search {
  display: none;
  padding: 18px;
  border: 1px dashed var(--line-strong);
  border-radius: 14px;
  color: var(--ink-dim);
  margin-bottom: 20px;
}
.empty-search.show { display: block; }

.track-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; padding-bottom: 28px; }
.track-card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  overflow: hidden;
  border-top: 6px solid var(--card, var(--accent));
  content-visibility: auto;
  contain-intrinsic-size: auto 480px;
}
.track-card.dim { opacity: 0.4; }
.track-card header { padding: 14px 16px 0; }
.track-card h2 { font-size: 1.35rem; margin: 0; }
.track-card h2 a { color: inherit; text-decoration: none; }
.track-emoji { font-size: 1.3rem; margin-right: 6px; }
.track-code { font-family: var(--mono); font-size: 0.75rem; color: var(--card, var(--accent)); letter-spacing: 0.08em; font-weight: 800; }
.track-card .purpose, .room-blurb { margin: 8px 0 0; padding: 0 16px 8px; color: var(--ink-dim); }
.room-list { list-style: none; margin: 0; padding: 0 8px 10px; }
.room-row {
  display: grid;
  grid-template-columns: 78px 1fr auto;
  gap: 8px;
  align-items: center;
  padding: 8px;
  border-radius: 12px;
}
.room-row:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }
.room-row[hidden] { display: none; }
.room-code { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); font-weight: 700; }
.room-title { color: var(--ink); text-decoration: none; font-weight: 650; }
.room-title.planned { color: var(--muted); }
.badge {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 800;
}
.badge.draft, .badge.written { color: #1a1208; background: #fbbf24; border-color: transparent; }
.badge.polished { color: #042f2e; background: #5eead4; border-color: transparent; }
.badge.verified { color: #042014; background: #6ee7b7; border-color: transparent; }
.badge.planned { color: var(--muted); }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 22px 0 40px;
  color: var(--muted);
  font-size: 0.88rem;
}
.crumbs { color: var(--muted); font-size: 0.88rem; margin: 16px 0 8px; }
.crumbs a { color: var(--ink-dim); text-decoration: none; }
.track-hero { padding: 8px 0 8px; }
.track-banner {
  border-radius: 24px;
  padding: 22px;
  margin-bottom: 12px;
  color: #0b1020;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
}
.track-banner h1, .track-banner .lede, .track-banner .kicker { color: #0b1020; }
.track-banner .kicker { letter-spacing: 0.14em; }
.num-badge {
  display: inline-grid;
  place-items: center;
  min-width: 46px;
  height: 46px;
  border-radius: 14px;
  background: #fff;
  color: #0b1020;
  font-weight: 800;
  margin-bottom: 8px;
}

.room-table, table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.room-table { margin: 12px 0 40px; }
.table-wrap, .room-table {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
}
.table-wrap { overflow-x: auto; margin: 12px 0 18px; max-width: 100%; }
th, td { padding: 10px 12px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th {
  background: color-mix(in srgb, var(--accent) 12%, var(--card-bg));
  color: var(--ink);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
tr:last-child td { border-bottom: 0; }
.room-table tr[hidden] { display: none; }

.room-shell { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 22px; padding: 16px 0 72px; }
.toc, .section-dock {
  position: sticky;
  top: 86px;
  align-self: start;
  max-height: calc(100vh - 110px);
  overflow: auto;
  background: var(--glass);
  backdrop-filter: blur(16px) saturate(1.3);
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: 10px;
  box-shadow: var(--shadow);
}
.toc ol { list-style: none; margin: 0; padding: 0; }
.toc a {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  text-decoration: none;
  color: var(--ink-dim);
  padding: 6px 8px;
  border-radius: 10px;
  font-size: 0.88rem;
}
.toc a:hover, .toc a.active {
  color: var(--ink);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}
.toc .n {
  font-family: var(--mono);
  color: var(--accent-ink);
  background: var(--accent);
  border-radius: 8px;
  min-width: 28px;
  text-align: center;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 0;
}
.room-main { min-width: 0; }
.room-main section { padding: 8px 0 18px; }
#hdr {
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--accent) 22%, var(--card-bg)), var(--card-bg) 55%);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 18px 18px 8px;
  box-shadow: var(--shadow);
}
.sec-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: color-mix(in srgb, var(--accent) 16%, var(--card-bg));
  color: var(--ink);
  border-radius: 999px;
  padding: 4px 10px 4px 4px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}
.meta-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.meta-chip {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.82rem;
  color: var(--ink-dim);
}
.meta-chip strong { color: var(--ink); }
.takeaways {
  background: transparent;
  border: 0;
  padding: 0;
  margin: 12px 0;
}
.takeaways h2 { font-size: 1.05rem; }
.takeaways ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.takeaways li {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-left: 5px solid var(--accent);
  border-radius: 14px;
  padding: 10px 12px;
  box-shadow: var(--shadow);
}
.why {
  background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 18%, var(--card-bg)), var(--card-bg));
  border-left: 4px solid var(--accent);
  padding: 10px 12px;
  border-radius: 0 14px 14px 0;
  margin: 12px 0;
}
.canon-visuals { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 14px 0; }
.canon-visuals figure {
  margin: 0;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.canon-visuals figcaption { padding: 8px 12px 12px; color: var(--muted); font-size: 0.82rem; }
.illu { display: block; width: 100%; height: auto; }
.diagram {
  background: var(--illu-bg);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: auto;
  margin: 12px 0;
  box-shadow: var(--shadow);
}
.diagram svg { display: block; width: 100%; min-width: 0; height: auto; }
.legend { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 0; padding: 0; list-style: none; }
.legend li {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.82rem;
}
.num {
  display: inline-grid;
  place-items: center;
  min-width: 1.4rem;
  height: 1.4rem;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.75rem;
  font-weight: 800;
  margin-right: 6px;
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 14px; }
.chip {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 4px 8px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--accent) 14%, var(--card-bg));
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
}
.packet { fill: var(--accent-2); stroke: var(--card-bg); stroke-width: 2; }
.flow-step { transition: opacity 0.45s ease, transform 0.45s ease; }
.flow-step:not(.in) { opacity: 0.25; }

.callout {
  border-radius: 16px;
  padding: 12px 14px;
  margin: 14px 0;
  border: 1px solid var(--line);
  background: var(--card-bg);
  max-width: 78ch;
  box-shadow: var(--shadow);
}
.callout .label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 800;
  margin-bottom: 4px;
}
.callout .label::before { font-size: 1rem; letter-spacing: 0; }
.callout.tip { border-left: 5px solid var(--t1); }
.callout.tip .label { color: var(--t1); }
.callout.tip .label::before { content: "💡"; }
.callout.gotcha { border-left: 5px solid var(--danger); }
.callout.gotcha .label { color: var(--danger); }
.callout.gotcha .label::before { content: "⚠️"; }
.callout.note { border-left: 5px solid var(--gold); }
.callout.note .label { color: var(--gold-2); }
.callout.note .label::before { content: "📝"; }
.callout.warn, .callout.exam { border-left: 5px solid var(--t7); }
.callout.warn .label, .callout.exam .label { color: var(--t7); }
.callout.warn .label::before, .callout.exam .label::before { content: "🎯"; }
.callout.def { border-left: 5px solid var(--t2); }
.callout.def .label { color: var(--t2); }
.callout.def .label::before { content: "📘"; }
.callout.interview { border-left: 5px solid var(--t5); }
.callout.interview .label { color: var(--t5); }
.callout.interview .label::before { content: "🎤"; }
.callout p:last-child { margin-bottom: 0; }

mark.todo-verify {
  background: #fbbf24;
  color: #1a1208;
  padding: 0 5px;
  border-radius: 4px;
  font-weight: 750;
  font-size: 0.84em;
}
mark.recheck { background: transparent; color: var(--t5); border-bottom: 1px dashed var(--t5); font-weight: 650; }

ol.steps { padding-left: 0; list-style: none; counter-reset: step; }
ol.steps > li {
  counter-increment: step;
  margin: 0 0 12px;
  padding: 12px 14px 12px 58px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 14px;
  position: relative;
}
ol.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 12px;
  top: 12px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 800;
}
ol.steps .path { font-family: var(--mono); font-size: 0.82rem; color: var(--accent); display: block; margin-bottom: 4px; }
.shot {
  margin-top: 8px;
  border: 1px dashed color-mix(in srgb, var(--accent) 55%, transparent);
  border-radius: 10px;
  padding: 10px 12px;
  color: var(--muted);
  font-size: 0.85rem;
}

#selfq details.qnode, .qa details, details.reveal {
  margin: 8px 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card-bg);
  padding: 0 12px 8px;
}
#selfq details.qnode > summary, .qa summary, .reveal summary { cursor: pointer; padding: 10px 0; font-weight: 700; }
.lvl {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--accent-ink);
  background: var(--accent);
  border-radius: 6px;
  padding: 1px 6px;
  margin-right: 6px;
}
.answer, .reveal p { color: var(--ink-dim); }
details[open] > summary ~ * { animation: rise 0.35s ease; }

.lab { list-style: none; padding: 0; margin: 12px 0; }
.lab li {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  margin-bottom: 8px;
}
.lab label { display: flex; gap: 10px; align-items: flex-start; cursor: pointer; }
.lab input { margin-top: 5px; accent-color: var(--accent); }
.lab li.checked label { text-decoration: line-through; text-decoration-color: var(--muted); }

.quiz-tools, .study-bar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 12px 0; }
.qgrid { display: grid; gap: 12px; }
.qcard, .flash {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px;
  background: var(--card-bg);
  box-shadow: var(--shadow);
}
.qcard header { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 6px; }
.kind {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-ink);
  background: var(--accent);
  border-radius: 999px;
  padding: 2px 8px;
  font-weight: 800;
}
.card-stage { perspective: 900px; min-height: 220px; }
.flash h2 { margin: 0 0 8px; }
.audio-slot, .placeholder-asset, .sim-canvas, .sim-out, .mindmap, .qa details {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card-bg);
}
.audio-slot, .sim-canvas, .sim-out { padding: 12px; margin: 12px 0; }
.sim { display: grid; grid-template-columns: minmax(0, 240px) minmax(0, 1fr); gap: 16px; }
.sim-palette button, .choice { display: block; width: 100%; text-align: left; margin: 0 0 8px; }
.sim-node { border: 1px solid var(--accent); border-radius: 12px; padding: 8px 10px; margin: 0 0 8px; background: color-mix(in srgb, var(--accent) 10%, var(--card-bg)); }
.sim-out { font-family: var(--mono); font-size: 0.86rem; white-space: pre-wrap; overflow: auto; }
.mindmap-figure { margin: 0 0 18px; }
.mindmap { width: 100%; height: auto; aspect-ratio: 960 / 560; background: var(--illu-bg); }
.prompt { font-style: italic; color: var(--ink-dim); }
.cite-list { padding-left: 1.2rem; }
.cite-list li { margin: 0 0 10px; }
.room-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 16px 0; }
.room-pager a, .room-pager .edge {
  display: block;
  text-decoration: none;
  color: var(--ink);
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
}
.room-pager .next { text-align: right; }
.room-pager span, .room-pager em { display: block; color: var(--muted); font-size: 0.78rem; font-style: normal; }
.last-opened { display: flex; justify-content: space-between; gap: 12px; align-items: center; }
.last-opened[hidden] { display: none; }
.glossary-tools { display: flex; gap: 10px; align-items: center; margin: 8px 0 14px; }
.glossary-tools input { flex: 1; }
dl.glossary { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 12px 0 18px; }
.glossary .term, .glossary-card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 12px;
  margin: 0;
  box-shadow: var(--shadow);
}
.glossary dt, .glossary-card h3 { margin: 0; font-size: 1rem; }
.glossary dd, .glossary-card p { margin: 4px 0 0; color: var(--ink-dim); }
.glossary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 28px; }
.eco-sub { margin-top: 1.6rem; }
kbd {
  font-family: var(--mono);
  font-size: 0.75rem;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 6px;
  padding: 1px 5px;
  background: var(--bg-3);
}

.cmdk {
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 28, 0.55);
  z-index: 70;
  display: grid;
  place-items: start center;
  padding-top: 12vh;
}
.cmdk[hidden] { display: none; }
.cmdk-panel {
  width: min(680px, calc(100% - 24px));
  background: var(--card-bg);
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 12px;
}
.cmdk-panel ul { list-style: none; margin: 10px 0 0; padding: 0; max-height: 50vh; overflow: auto; }
.cmdk-panel li a, .cmdk-panel li button {
  display: block;
  width: 100%;
  text-align: left;
  text-decoration: none;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-radius: 10px;
  padding: 8px 10px;
  font: inherit;
}
.cmdk-panel li.active a, .cmdk-panel li.active button, .cmdk-panel li a:hover {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}
.cmdk-kind { color: var(--accent); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; font-weight: 800; }
.cmdk-hint { color: var(--muted); font-size: 0.8rem; margin: 8px 4px 0; }

.to-top {
  position: fixed;
  right: 14px;
  bottom: 18px;
  z-index: 35;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 16px;
  background: linear-gradient(140deg, var(--t1), var(--t2));
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }
.confetti { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 75; }

.rise { animation: rise 0.6s ease both; }
@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}
@keyframes mesh {
  0% { background-position: 0% 40%; }
  50% { background-position: 100% 60%; }
  100% { background-position: 0% 40%; }
}
.lift { transition: transform 0.2s ease, box-shadow 0.2s ease; }
.lift:hover { transform: translateY(-4px); box-shadow: var(--glow); }
.tilt { transform-style: preserve-3d; transition: transform 0.15s ease; }

pre, code { max-width: 100%; }
pre { overflow-x: auto; background: var(--illu-bg); border-radius: 12px; padding: 10px; }

/* Desktop keeps the More menu as a dropdown. The icon row stays in the bar. */
@media (max-width: 980px) {
  .hero-live, .dash, .sim, .track-grid, .stats, .stat-row, .canon-visuals, dl.glossary, .glossary-grid {
    grid-template-columns: 1fr;
  }
  .track-map { grid-template-columns: 1fr 1fr; }
  .room-shell { grid-template-columns: 1fr; }
}
@media (max-width: 800px) {
  .toc, .section-dock {
    position: fixed;
    left: 8px;
    right: 8px;
    bottom: 8px;
    top: auto;
    z-index: 35;
    max-height: 72px;
    display: block;
    border-radius: 16px;
  }
  .toc ol { display: flex; gap: 6px; }
  .toc a { white-space: nowrap; }
  .room-shell { padding-bottom: 96px; }
  .to-top { bottom: 88px; }
  .brand-name small { display: none; }
  .table-wrap, .room-table { overflow: visible; background: transparent; border: 0; box-shadow: none; }
  table, thead, tbody, tr, th, td { display: block; width: 100%; }
  thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); }
  tr {
    margin: 0 0 12px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--card-bg);
    padding: 8px 12px;
    box-shadow: var(--shadow);
  }
  td, th { border: 0; padding: 6px 0; }
  td::before {
    content: attr(data-label);
    display: block;
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 800;
  }
  .room-table tr[hidden] { display: none; }
}
@media (max-width: 520px) {
  .brand-name { max-width: 6.5rem; overflow: hidden; text-overflow: ellipsis; }
}
@media (max-width: 420px) {
  .brand-name { font-size: 0.82rem; max-width: 5.5rem; }
  .track-map, .stats, .stat-row { grid-template-columns: 1fr; }
  .plan-item { grid-template-columns: 1fr; }
  .plan-item::before { left: 18px; }
  .plan-card { margin-left: 28px; }
  h1 { font-size: 1.85rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
  .flow-step { opacity: 1 !important; }
  .rise { animation: none; }
}

@media print {
  body { background: white; color: #161616; }
  body::before, .topbar, .toc, .search-row, .quiz-tools, .readbar, .to-top, .nav-panel, .site-footer .noprint, button, audio { display: none !important; }
  a { color: #111; }
  .room-shell { display: block; padding: 0; }
  .hero-live { animation: none; }
}

/* v3: slim bar, full-bleed hero, docks, tiles, game */
:root { --bg: #e4e9ff; }
html[data-theme="dark"] { --bg: #070b18; --bg-2: #101628; }

h1 { font-size: clamp(2.5rem, 6vw, 5rem); font-weight: 800; letter-spacing: -0.05em; line-height: 0.98; }
h2 { font-size: clamp(1.65rem, 3.1vw, 2.55rem); font-weight: 800; }
.grad-text {
  background-size: 200% 100%;
  animation: shine 7s linear infinite;
}
@keyframes shine {
  from { background-position: 0% 50%; }
  to { background-position: 200% 50%; }
}

.topbar { overflow: visible; top: 8px; }
.bar-inner { flex-wrap: nowrap; gap: 4px; padding: 6px 8px; }
.brand-mark { width: 32px; height: 32px; }
.brand { flex: none; }
.nav-quick { display: flex; align-items: center; gap: 2px; flex: none; }
.nav-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  text-decoration: none;
  font-size: 1.05rem;
  border: 1px solid transparent;
  color: var(--ink);
}
.nav-icon:hover, .nav-icon[aria-current="page"] {
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  border-color: var(--accent);
  box-shadow: 0 0 16px color-mix(in srgb, var(--accent) 45%, transparent);
}
.nav-search { flex: 0 0 34px; width: 34px; min-width: 34px; }
.nav-q {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 12px;
  color: transparent;
  caret-color: transparent;
  background-position: center;
}
.nav-q::placeholder { color: transparent; }
.icon-btn, .nav-toggle { width: 44px; height: 44px; border-radius: 12px; font-size: 1rem; }
.nav-more {
  width: min(280px, calc(100vw - 24px));
  max-height: 70vh;
}

.hero-live {
  width: 100%;
  margin: 0 0 22px;
  border-radius: 0 0 40px 40px;
  min-height: 540px;
  padding: 56px 6vw 64px;
  grid-template-columns: 1.15fr 0.85fr;
  box-shadow: none;
}
.mesh-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  pointer-events: none;
  z-index: 0;
}
.hero-copy, .hero-art { position: relative; z-index: 1; min-width: 0; }
.hero-live h1 { font-size: clamp(2.3rem, 5.2vw, 4.8rem); margin-bottom: 14px; }
.eco-svg { width: 100%; height: auto; filter: drop-shadow(0 24px 40px rgba(11, 16, 32, 0.35)); }

main .wrap > section:nth-child(odd) {
  background: color-mix(in srgb, var(--t2) 9%, var(--card-bg));
  border: 1px solid color-mix(in srgb, var(--t2) 22%, transparent);
  border-radius: 28px;
  padding: 18px 18px 8px;
  margin: 16px 0;
}
main .wrap > section:nth-child(even) {
  background: color-mix(in srgb, var(--t1) 11%, var(--card-bg));
  border: 1px solid color-mix(in srgb, var(--t1) 24%, transparent);
  border-radius: 28px;
  padding: 18px 18px 8px;
  margin: 16px 0;
}
.track-grid {
  background: color-mix(in srgb, var(--t5) 10%, var(--card-bg));
  border: 1px solid color-mix(in srgb, var(--t5) 22%, transparent);
  border-radius: 28px;
  padding: 16px;
  margin-bottom: 28px;
}

.track-map { gap: 16px; }
.track-tile {
  min-height: 228px;
  color: #fff;
  background:
    radial-gradient(120px 80px at 12% 18%, rgba(255, 255, 255, 0.35), transparent 60%),
    linear-gradient(150deg, var(--card), color-mix(in srgb, var(--card) 42%, #0b1020));
  border: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--card) 55%, transparent),
    0 18px 40px color-mix(in srgb, var(--card) 38%, transparent);
  padding: 16px;
}
.track-tile::before { display: none; }
.track-tile h3, .track-tile p { color: #fff; }
.track-tile h3 { font-size: 1.2rem; margin-top: 12px; }
.track-tile:hover {
  box-shadow:
    0 0 0 1px #fff,
    0 0 28px color-mix(in srgb, var(--card) 70%, transparent),
    0 22px 40px rgba(0, 0, 0, 0.25);
}
.tile-art { display: block; width: 72px; height: 72px; }
.tile-art svg { width: 72px; height: 72px; display: block; }
.tile-num { color: #fff; right: 56px; top: 18px; }
.tile-ring .ring-track { stroke: rgba(255, 255, 255, 0.35); }
.tile-ring .ring-value { stroke: #fff; }

.room-shell { display: block; padding: 12px 0 80px 84px; }
.section-dock {
  position: fixed;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 56px;
  max-height: min(72vh, 640px);
  z-index: 30;
  padding: 8px 6px;
  border-radius: 20px;
}
.section-dock ol { display: grid; gap: 4px; margin: 0; padding: 0; }
.section-dock a {
  position: relative;
  font-size: 0;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  margin: 0 auto;
}
.section-dock .n { display: none; }
.section-dock .dock-emoji { font-size: 1.15rem; line-height: 1; }
.section-dock a:hover::after, .section-dock a:focus-visible::after {
  content: attr(data-tip);
  position: absolute;
  left: 46px;
  top: 50%;
  transform: translateY(-50%);
  background: #0b1020;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 8px;
  white-space: nowrap;
  z-index: 6;
  pointer-events: none;
}

.room-main > section {
  border-radius: 24px;
  padding: 16px 16px 8px;
  margin: 12px 0;
}
.room-main > section:nth-child(odd) {
  background: color-mix(in srgb, var(--accent) 12%, var(--card-bg));
}
.room-main > section:nth-child(even) {
  background: color-mix(in srgb, var(--accent-2) 14%, var(--card-bg));
}
.canon-visuals { display: block; }
.room-banner, .room-seq, .mini-map {
  margin: 0 0 14px;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  box-shadow: 0 0 24px color-mix(in srgb, var(--accent) 28%, transparent);
}
.room-banner { border-radius: 22px; }
.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
}
ol.steps > li {
  padding: 18px 16px 18px 88px;
  border-radius: 18px;
  background: color-mix(in srgb, var(--accent) 8%, var(--card-bg));
  border-color: color-mix(in srgb, var(--accent) 28%, var(--line));
}
ol.steps > li::before {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  top: 14px;
  font-size: 1.35rem;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  color: #fff;
}

.qcard, .flash, .callout {
  border: 1px solid color-mix(in srgb, var(--accent) 50%, transparent);
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--accent) 22%, transparent),
    0 14px 32px color-mix(in srgb, var(--accent) 16%, transparent);
}
.game-hud {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 8px 0 14px;
  padding: 10px 12px;
  border-radius: 16px;
  background: color-mix(in srgb, var(--accent) 14%, var(--card-bg));
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  box-shadow: 0 0 22px color-mix(in srgb, var(--accent) 24%, transparent);
}
.game-hud .streak, .game-hud [data-xp-label] { font-weight: 800; white-space: nowrap; }
.game-hud .xp {
  flex: 1;
  height: 12px;
  border-radius: 99px;
  background: color-mix(in srgb, var(--ink) 12%, transparent);
  overflow: hidden;
  min-width: 48px;
}
.game-hud .xp i {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--t1), var(--t2), var(--t8));
}
.emoji-pop { font-size: 1.35rem; min-width: 1.4rem; display: inline-block; }
.emoji-pop.pop { animation: pop 0.45s ease; }
@keyframes pop {
  0% { transform: scale(0.4); }
  60% { transform: scale(1.35); }
  100% { transform: scale(1); }
}
.flip-scene { perspective: 1100px; }
.flip-inner {
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.55s ease;
  min-height: 150px;
}
.flash.is-flipped .flip-inner,
.qcard.is-flipped .flip-inner,
.flip-inner.is-flipped { transform: rotateY(180deg); }
.flip-face {
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.flip-backface, .qcard .qback {
  position: absolute;
  inset: 0;
  transform: rotateY(180deg);
  overflow: auto;
  background: var(--card-bg);
  border-radius: 12px;
}
#fc-back[hidden] { display: block !important; }
.card-stage { min-height: 240px; }
.flash { min-height: 200px; }

@media (max-width: 980px) {
  .hero-live { grid-template-columns: 1fr; min-height: 0; padding: 36px 20px 28px; }
}
@media (max-width: 800px) {
  .room-shell { padding: 8px 0 96px; }
  .section-dock {
    top: auto;
    left: 8px;
    right: 8px;
    bottom: 8px;
    transform: none;
    width: auto;
    height: 56px;
    max-height: 56px;
    overflow-x: auto;
    overflow-y: hidden;
    display: block;
  }
  .section-dock ol { display: flex; flex-wrap: nowrap; gap: 4px; width: max-content; }
  .section-dock a:hover::after, .section-dock a:focus-visible::after {
    left: 50%;
    top: auto;
    bottom: 46px;
    transform: translateX(-50%);
  }
  .to-top { bottom: 76px; }
}
@media (max-width: 720px) {
  .brand-name { display: none; }
}
@media (max-width: 420px) {
  h1, .hero-live h1 { font-size: 2.15rem; }
  .track-map, .stats, .stat-row { grid-template-columns: 1fr; }
}