@font-face {
  font-family: "Campus Sans";
  src: local("Avenir Next"), local("Segoe UI"), local("Helvetica Neue"), local("DejaVu Sans");
  font-display: swap;
  size-adjust: 100%;
  ascent-override: 92%;
  descent-override: 22%;
  line-gap-override: 0%;
}
@font-face {
  font-family: "Campus Display";
  src: local("Iowan Old Style"), local("Palatino Linotype"), local("Palatino"), local("Georgia"), local("DejaVu Serif");
  font-display: swap;
  size-adjust: 100%;
  ascent-override: 90%;
  descent-override: 22%;
  line-gap-override: 0%;
}
:root {
  color-scheme: dark;
  --cc-bg: #0b1120;
  --cc-surface: #131d31;
  --cc-surface-2: #1a2740;
  --cc-ink: #e8eef7;
  --cc-muted: #b7c3d4;
  --cc-line: rgba(232, 238, 247, 0.16);
  --cc-accent-1: #ffb020;
  --cc-accent-2: #2dd4bf;
  --cc-accent-3: #818cf8;
  --cc-accent-4: #f472b6;
  --cc-danger: #fb7185;
  --cc-ok: #34d399;
  --cc-shadow: 0 24px 60px rgba(2, 6, 16, 0.45);
  --cc-radius: 22px;
  --cc-sans: "Campus Sans", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --cc-display: "Campus Display", "Iowan Old Style", Palatino, Georgia, serif;
  --cc-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --cc-rail: 300px;
  --cc-player: 76px;
  --cc-nav: 0px;
  --cc-scale: 1;
  --cc-on-accent: #1a1204;
  --stack: 124px;
  --ink: var(--cc-bg);
  --paper: var(--cc-ink);
  --muted: var(--cc-muted);
  --line: var(--cc-line);
  --copper: var(--cc-accent-1);
  --teal: var(--cc-accent-2);
  --gold: var(--cc-accent-1);
  --glass: color-mix(in srgb, var(--cc-surface) 88%, transparent);
  --glass-2: rgba(255, 255, 255, 0.04);
  --shadow: var(--cc-shadow);
}

:root[data-theme="light"] {
  color-scheme: light;
  --cc-on-accent: #fffaf3;
  --cc-bg: #f8fafc;
  --cc-surface: #ffffff;
  --cc-surface-2: #eef2f7;
  --cc-ink: #0b1120;
  --cc-muted: #3e4c5e;
  --cc-line: rgba(11, 17, 32, 0.14);
  --cc-accent-1: #9a3412;
  --cc-accent-2: #0f766e;
  --cc-accent-3: #4338ca;
  --cc-accent-4: #9d174d;
  --cc-danger: #be123c;
  --cc-ok: #047857;
  --cc-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  --glass: rgba(255, 255, 255, 0.9);
  --glass-2: rgba(11, 17, 32, 0.04);
}

:root[data-font="sm"] { --cc-scale: 0.92; }
:root[data-font="lg"] { --cc-scale: 1.14; }
:root[data-font="xl"] { --cc-scale: 1.28; }

:root[data-theme="futuristic"] {
  color-scheme: dark;
  --cc-bg: #050816;
  --cc-surface: #0c1430;
  --cc-surface-2: #121c3d;
  --cc-ink: #e7f6ff;
  --cc-muted: #b7cbe4;
  --cc-line: rgba(0, 229, 255, 0.38);
  --cc-accent-1: #00e5ff;
  --cc-accent-2: #7c5cff;
  --cc-accent-3: #5eead4;
  --cc-accent-4: #f472b6;
  --cc-on-accent: #041018;
  --cc-shadow: 0 24px 60px rgba(0, 8, 30, 0.55);
  --glass: color-mix(in srgb, #0c1430 86%, transparent);
}
:root[data-theme="gaming"] {
  color-scheme: dark;
  --cc-bg: #0a0614;
  --cc-surface: #140a22;
  --cc-surface-2: #1e1033;
  --cc-ink: #f4ffe8;
  --cc-muted: #d5f5b4;
  --cc-line: rgba(57, 255, 20, 0.45);
  --cc-accent-1: #39ff14;
  --cc-accent-2: #ff2bd6;
  --cc-accent-3: #7df9ff;
  --cc-accent-4: #ffe600;
  --cc-on-accent: #041204;
  --cc-display: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --cc-radius: 8px;
  --cc-shadow: 0 0 0 1px rgba(57, 255, 20, 0.35), 8px 8px 0 rgba(255, 43, 214, 0.25);
}
:root[data-theme="neon"] {
  color-scheme: dark;
  --cc-bg: #07010f;
  --cc-surface: #14061f;
  --cc-surface-2: #1c0a2e;
  --cc-ink: #fff5ff;
  --cc-muted: #f5c6ff;
  --cc-line: rgba(255, 45, 149, 0.55);
  --cc-accent-1: #ff2d95;
  --cc-accent-2: #22e7ff;
  --cc-accent-3: #c084fc;
  --cc-accent-4: #facc15;
  --cc-on-accent: #2a0014;
  --cc-shadow: 0 0 32px rgba(255, 45, 149, 0.25);
  --glass: color-mix(in srgb, #14061f 88%, transparent);
}
:root[data-theme="console"] {
  color-scheme: dark;
  --cc-bg: #0f1b2d;
  --cc-surface: #16263a;
  --cc-surface-2: #1d3148;
  --cc-ink: #f7f3ea;
  --cc-muted: #d6deea;
  --cc-line: rgba(255, 153, 0, 0.35);
  --cc-accent-1: #ff9900;
  --cc-accent-2: #3dcfb4;
  --cc-accent-3: #7aa7ff;
  --cc-accent-4: #ffb4a2;
  --cc-danger: #ff8a80;
  --cc-ok: #7dcea0;
  --cc-shadow: 0 24px 60px rgba(8, 14, 24, 0.5);
  --glass: color-mix(in srgb, var(--cc-surface) 90%, transparent);
  --glass-2: rgba(255, 153, 0, 0.06);
}

:root[data-theme="contrast"] {
  color-scheme: dark;
  --cc-bg: #000;
  --cc-surface: #000;
  --cc-surface-2: #000;
  --cc-ink: #fff;
  --cc-muted: #ffe14a;
  --cc-line: #ffe14a;
  --cc-accent-1: #ffe14a;
  --cc-accent-2: #fff;
  --cc-accent-3: #fff;
  --cc-accent-4: #fff;
  --cc-danger: #fff;
  --cc-ok: #fff;
  --cc-shadow: none;
  --glass: #000;
  --glass-2: #000;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  font-family: var(--cc-sans);
  font-size: calc(16px * var(--cc-scale));
  color: var(--cc-ink);
  background:
    radial-gradient(900px 420px at 0% -10%, color-mix(in srgb, var(--cc-accent-1) 22%, transparent), transparent 55%),
    radial-gradient(800px 480px at 100% 0%, color-mix(in srgb, var(--cc-accent-3) 18%, transparent), transparent 50%),
    var(--cc-bg);
  letter-spacing: 0.01em;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--cc-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--cc-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 30% 0%, #000 10%, transparent 70%);
  opacity: 0.35;
}
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--cc-accent-2); }
:focus-visible { outline: 3px solid var(--cc-accent-1); outline-offset: 3px; }
.skip {
  position: absolute;
  left: 12px;
  top: -48px;
  background: var(--cc-accent-1);
  color: #1a1204;
  padding: 8px 12px;
  z-index: 80;
  border-radius: 8px;
}
.skip:focus { top: 12px; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.app {
  display: grid;
  grid-template-columns: var(--cc-rail) 1fr;
  min-height: 100vh;
  padding-bottom: calc(var(--cc-player) + var(--cc-nav) + 24px);
}
.rail {
  position: sticky;
  top: var(--stack);
  height: calc(100vh - var(--stack));
  padding: 18px 14px 24px;
  border-right: 1px solid var(--cc-line);
  background: color-mix(in srgb, var(--cc-surface) 82%, transparent);
  overflow: auto;
}
.brand {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 12px;
  align-items: center;
  padding: 6px 8px 16px;
}
.mark {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: var(--cc-surface-2);
  box-shadow: inset 0 0 0 1px var(--cc-line), var(--cc-shadow);
}
.mark svg { width: 36px; height: 36px; }
.brand-name { margin: 0; font-family: var(--cc-display); font-size: 20px; line-height: 1.05; }
.brand small, .brand .brand-kicker { color: var(--cc-muted); font-size: 12px; }
.track-list { display: grid; gap: 6px; padding: 4px; }
.track-link {
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 14px;
  padding: 10px;
  min-height: 44px;
  display: grid;
  grid-template-columns: 18px 1fr auto;
  gap: 8px;
  align-items: center;
  color: var(--cc-ink);
}
.track-link:hover, .track-link[aria-current="true"] {
  background: var(--cc-surface-2);
  border-color: var(--cc-line);
}
.track-link small { color: var(--cc-muted); display: block; }
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--hue, var(--cc-accent-1));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--hue, var(--cc-accent-1)) 28%, transparent);
}
.rail-foot { display: flex; flex-wrap: wrap; gap: 6px; padding: 14px 4px 8px; }
.rail-foot button, .ghost, .solid, .chip, .theme button {
  border: 1px solid var(--cc-line);
  background: var(--cc-surface-2);
  border-radius: 999px;
  padding: 8px 12px;
  min-height: 36px;
  color: var(--cc-ink);
}
.solid {
  background: var(--cc-accent-1);
  border-color: transparent;
  color: var(--cc-on-accent);
  font-weight: 700;
}
.chip[aria-pressed="true"] { background: var(--cc-ink); color: var(--cc-bg); }

.main { min-width: 0; padding: clamp(16px, 2vw, 28px); }
.topbar {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.search-launch {
  flex: 1 1 220px;
  min-width: 0;
  text-align: left;
  border-radius: 16px;
  border: 1px solid var(--cc-line);
  background: var(--glass);
  padding: 12px 14px;
  min-height: 44px;
  display: flex;
  justify-content: space-between;
  color: var(--cc-muted);
}
kbd {
  font-family: var(--cc-mono);
  border: 1px solid var(--cc-line);
  border-radius: 6px;
  padding: 2px 6px;
  font-size: 12px;
}
.progress { display: flex; align-items: center; gap: 8px; min-width: 120px; }
.progress-track { width: 88px; height: 6px; border-radius: 99px; background: var(--cc-line); overflow: hidden; }
#progress-pip { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--cc-accent-2), var(--cc-accent-1)); }
.theme { display: flex; gap: 6px; }
.streak { display: flex; align-items: baseline; gap: 6px; }
.streak span { color: var(--cc-muted); font-size: 12px; }
.icon-btn {
  display: none;
  border: 1px solid var(--cc-line);
  background: var(--cc-surface);
  color: var(--cc-ink);
  border-radius: 12px;
  min-width: 44px;
  min-height: 44px;
}

#view-kicker {
  margin: 0 0 6px;
  color: var(--cc-muted);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
#view-title {
  font-family: var(--cc-display);
  font-size: clamp(calc(36px * var(--cc-scale)), 5vw, calc(68px * var(--cc-scale)));
  line-height: 0.95;
  font-weight: 600;
  margin: 0 0 14px;
  max-width: 16ch;
}
#view-title::after {
  content: "";
  display: block;
  width: min(180px, 40%);
  height: 8px;
  margin-top: 10px;
  border-radius: 999px;
  background: radial-gradient(120% 80% at 10% 50%, transparent 40%, var(--cc-accent-1) 42% 58%, transparent 60%),
    linear-gradient(90deg, var(--cc-accent-1), var(--cc-accent-2));
}
.lede { font-size: calc(18px * var(--cc-scale)); line-height: 1.55; max-width: 66ch; color: var(--cc-ink); }
.why {
  margin: 14px 0;
  padding: 14px 16px;
  border-left: 4px solid var(--cc-accent-1);
  background: linear-gradient(90deg, color-mix(in srgb, var(--cc-accent-1) 16%, transparent), transparent);
  border-radius: 0 16px 16px 0;
}
.hero { display: grid; grid-template-columns: 1fr 1.05fr; gap: 22px; align-items: stretch; }
.stats-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.stat {
  min-width: 86px;
  padding: 8px 10px;
  border-radius: 14px;
  background: var(--cc-surface);
  border: 1px solid var(--cc-line);
}
.stat b { display: block; min-width: 4ch; font-variant-numeric: tabular-nums; font-family: var(--cc-display); font-size: 22px; }
.stat span { color: var(--cc-muted); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }

.stage-3d {
  position: relative;
  height: 460px;
  border-radius: 28px;
  overflow: hidden;
  background: var(--cc-bg);
  border: 1px solid var(--cc-line);
  box-shadow: var(--cc-shadow), inset 0 0 0 1px color-mix(in srgb, var(--cc-accent-1) 30%, transparent);
}
.stage-3d canvas { width: 100% !important; height: 100% !important; display: block; }
.arch-fallback { position: absolute; inset: 0; }
.arch-fallback[hidden] { display: none; }
.bezel-lamp {
  position: absolute;
  top: 12px;
  left: 14px;
  z-index: 2;
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cc-muted);
}
.bezel-lamp i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cc-accent-2);
  box-shadow: 0 0 10px var(--cc-accent-2);
}
.scenario-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

.section-head { display: flex; justify-content: space-between; gap: 12px; align-items: end; margin: 22px 0 12px; }
.section-head h2 { font-family: var(--cc-display); font-size: clamp(28px, 3vw, 40px); margin: 0; }
.grid-cards, .lesson-grid, .card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.glass, .card, .lesson-card, .lab-card {
  background: var(--cc-surface);
  border: 1px solid var(--cc-line);
  border-radius: var(--cc-radius);
  box-shadow: var(--cc-shadow);
}
.card, .lesson-card, .lab-card {
  padding: 16px;
  text-align: left;
  color: inherit;
  position: relative;
}
.card::before, .lesson-card::before, .lab-card::before {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  top: 0;
  height: 2px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--cc-accent-1), var(--cc-accent-2), var(--cc-accent-3), var(--cc-accent-4));
}
.card h2, .card h3, .lesson-card h2, .lesson-card h3, .lab-card h2 { margin: 8px 0; font-family: var(--cc-display); font-size: calc(24px * var(--cc-scale)); }
.meta { color: var(--cc-muted); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; }
.lesson { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.75fr); gap: 16px; }
.prose p { line-height: 1.6; font-size: calc(17px * var(--cc-scale)); }
.points { display: grid; gap: 8px; padding: 0; margin: 12px 0; list-style: none; }
.points li {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 8px;
  padding: 10px;
  border-radius: 14px;
  background: var(--cc-surface-2);
  border: 1px solid var(--cc-line);
}
.num { font-family: var(--cc-display); font-size: 42px; line-height: 0.9; color: var(--cc-accent-1); }
.cite, .mistake { font-size: 14px; padding: 10px 12px; border-radius: 12px; background: var(--cc-surface-2); }
.mistake { border-left: 4px solid var(--cc-danger); }
.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin: 8px 0 12px; }
.tabs button[aria-selected="true"] { background: var(--cc-ink); color: var(--cc-bg); }
.figure-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin: 12px 0; }
.figure { margin: 0; padding: 10px; }
.figure svg, .anim svg, .flow-svg, .map-svg { width: 100%; height: auto; display: block; }
.figure figcaption, .caption { color: var(--cc-muted); font-size: 13px; margin-top: 6px; }
.ladder { display: grid; gap: 8px; }
.ladder-step {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 8px;
  padding: 8px;
  border-radius: 12px;
  border: 1px solid var(--cc-line);
}
.ladder-step.is-on { border-color: var(--cc-accent-1); background: color-mix(in srgb, var(--cc-accent-1) 12%, var(--cc-surface)); }
.flow-controls, .actions { display: flex; gap: 8px; flex-wrap: wrap; }
.iac-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.code, .log {
  font-family: var(--cc-mono);
  font-size: 12px;
  white-space: pre-wrap;
  max-height: 360px;
  overflow: auto;
  background: #07101c;
  color: #d7fff4;
  padding: 12px;
  border-radius: 12px;
  margin: 0;
}
:root[data-theme="light"] .code, :root[data-theme="light"] .log { background: #102033; color: #e7fff8; }

.player {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: calc(var(--cc-nav) + 10px);
  z-index: 30;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(120px, 220px) auto auto auto;
  gap: 10px;
  align-items: center;
  padding: 10px 14px;
}
#wave { width: 220px; height: 36px; aspect-ratio: 220 / 36; }
audio { display: block; width: min(100%, 420px); height: 54px; }
.bottom-nav { display: none; }
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 40;
  display: grid;
  place-items: start center;
  padding: 10vh 16px 16px;
}
.modal[hidden] { display: none; }
.modal-card { width: min(760px, 100%); padding: 16px; }
.modal-card input[type="search"], .field input, .field select, .field textarea, select, textarea {
  width: 100%;
  border: 1px solid var(--cc-line);
  background: var(--cc-bg);
  color: var(--cc-ink);
  border-radius: 10px;
  padding: 8px;
}
.hit, .choice {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  border-top: 1px solid var(--cc-line);
  padding: 10px 8px;
  color: inherit;
}
.choice { border: 1px solid var(--cc-line); border-radius: 14px; margin: 8px 0; background: var(--cc-surface-2); }
.choice.good { border-color: var(--cc-ok); }
.choice.bad { border-color: var(--cc-danger); }
.flip { min-height: 220px; display: grid; place-items: center; text-align: center; padding: 24px; font-family: var(--cc-display); font-size: 24px; }
.lab-layout { display: grid; grid-template-columns: 220px 1fr 280px; gap: 12px; }
.palette, .inspector, .canvas-pane { padding: 10px; min-height: 420px; }
.canvas-pane { position: relative; overflow: auto; min-height: 520px; }
.block-chip, .node {
  text-align: left;
  margin: 6px 0;
  padding: 8px;
  border-radius: 12px;
  border: 1px solid var(--cc-line);
  background: var(--cc-surface-2);
}
.node { position: absolute; width: 168px; min-height: 64px; cursor: grab; border-color: var(--cc-accent-1); }
.port { display: inline-block; margin: 3px 3px 0 0; font-size: 11px; border-radius: 99px; padding: 2px 6px; border: 1px solid var(--cc-line); background: transparent; color: inherit; }
.table-scroll { overflow-x: auto; max-width: 100%; -webkit-overflow-scrolling: touch; border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 560px; }
th, td { border-bottom: 1px solid var(--cc-line); text-align: left; padding: 8px 6px; vertical-align: top; }
.timeline { display: grid; gap: 10px; }
.t-item { display: grid; grid-template-columns: 120px 1fr; gap: 10px; padding: 12px; }
.gloss-row { display: grid; grid-template-columns: 96px 1fr; gap: 10px; padding: 12px; margin: 8px 0; align-items: center; }
.mark-svg svg { width: 84px; height: auto; }
.pager { display: flex; gap: 8px; align-items: center; margin: 8px 0; }
.studio-grid { display: grid; grid-template-columns: 280px 1fr; gap: 12px; }
.ccp-phone {
  border-radius: 28px;
  padding: 16px;
  background: linear-gradient(180deg, var(--cc-surface-2), var(--cc-bg));
  border: 1px solid var(--cc-line);
  min-height: 420px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sentiment {
  height: 14px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--cc-danger), var(--cc-accent-1), var(--cc-ok));
  position: relative;
}
.sentiment i { position: absolute; top: -4px; width: 4px; height: 22px; background: var(--cc-ink); border-radius: 4px; }
.meter-read { font-family: var(--cc-display); font-size: 28px; margin: 0; }
.bars { display: grid; gap: 8px; }
.bar-row { display: grid; grid-template-columns: 88px 1fr 52px; gap: 8px; align-items: center; font-size: 12px; }
.bar { height: 12px; border-radius: 99px; background: var(--cc-line); overflow: hidden; }
.bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--cc-accent-2), var(--cc-accent-1)); }
.backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 24;
}
.backdrop[hidden] { display: none; }
.confetti { position: fixed; inset: 0; pointer-events: none; z-index: 70; overflow: hidden; }
.confetti i { position: absolute; top: -12px; width: 8px; height: 14px; animation: fall 1.5s ease-in forwards; }
@keyframes fall { to { transform: translateY(100vh) rotate(220deg); opacity: 0.2; } }
.field { display: block; margin: 8px 0; }

@media (max-width: 980px) {
  .app { grid-template-columns: 1fr; }
  .icon-btn { display: inline-grid; place-items: center; }
  .rail {
    position: fixed;
    z-index: 26;
    width: min(88vw, 360px);
    transform: translateX(-105%);
    transition: transform 0.2s ease;
    background: var(--cc-bg);
  }
  .rail.open { transform: none; }
  .hero, .lesson, .lab-layout, .iac-grid, .studio-grid { grid-template-columns: 1fr; }
  .stage-3d { height: 320px; }
  .player { grid-template-columns: 1fr auto auto; }
  #clip-pick, #wave { display: none; }
}
@media (max-width: 640px) {
  :root { --cc-nav: 64px; }
  .bottom-nav {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 35;
    height: 64px;
    background: var(--cc-surface);
    border-top: 1px solid var(--cc-line);
  }
  .bottom-nav button {
    border: 0;
    background: transparent;
    color: var(--cc-muted);
    min-height: 64px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    font-size: 11px;
  }
  .bottom-nav button[aria-current="page"] { color: var(--cc-accent-1); }
  .bottom-nav svg { width: 20px; height: 20px; }
  .theme { display: none; }
  #view-title { font-size: clamp(calc(32px * var(--cc-scale)), 10vw, calc(44px * var(--cc-scale))); }
  .topbar { gap: 8px; }
  .t-item, .gloss-row { grid-template-columns: 1fr; }
  .table-scroll { box-shadow: inset -16px 0 12px -14px color-mix(in srgb, var(--cc-accent-1) 55%, transparent); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
  .confetti { display: none; }
  svg animateMotion, svg animate { display: none !important; }
}
:root[data-motion="reduce"] *,
:root[data-motion="reduce"] *::before,
:root[data-motion="reduce"] *::after {
  animation: none !important;
  transition: none !important;
  scroll-behavior: auto !important;
}
:root[data-motion="reduce"] .confetti { display: none; }
:root[data-motion="reduce"] svg animateMotion,
:root[data-motion="reduce"] svg animate { display: none !important; }

.settings { display: grid; gap: 16px; max-width: 880px; }
.settings fieldset {
  border: 1px solid var(--cc-line);
  border-radius: var(--cc-radius);
  background: var(--glass);
  padding: 14px;
  margin: 0;
}
.settings legend { padding: 0 6px; font-family: var(--cc-display); font-size: 1.2rem; }
.theme-grid, .font-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; }
.theme-card, .font-grid button {
  display: grid;
  gap: 4px;
  text-align: left;
  border-radius: 16px;
  border: 1px solid var(--cc-line);
  background: var(--cc-surface-2);
  padding: 10px;
  min-height: 44px;
}
.theme-card[aria-pressed="true"], .font-grid button[aria-pressed="true"] {
  border-color: var(--cc-accent-1);
  box-shadow: inset 0 0 0 2px var(--cc-accent-1);
}
.swatch { display: flex; height: 28px; border-radius: 8px; overflow: hidden; }
.swatch i { flex: 1; display: block; }
.checkline { display: flex; gap: 10px; align-items: center; margin: 8px 0; min-height: 44px; }
.sheet { width: 100%; border-collapse: collapse; }
.sheet th, .sheet td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--cc-line); vertical-align: top; }
.tips-teaser { padding: 14px; margin: 12px 0; }
.tip-list { margin: 8px 0 0; padding-left: 18px; }
.tip-list li { margin: 6px 0; }

.studio-bar {
  position: sticky;
  top: 0;
  z-index: 45;
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 8px 12px;
  background: color-mix(in srgb, var(--cc-bg) 90%, transparent);
  border-bottom: 1px solid var(--cc-line);
  backdrop-filter: blur(12px);
}
.studio-links {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  flex: 1;
  min-width: 0;
}
.brand-links {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}
.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--cc-line);
  background: var(--cc-surface-2);
  color: var(--cc-ink);
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}
.brand-link svg { width: 20px; height: 20px; flex: none; display: block; }
.studio-links a, .studio-home {
  white-space: nowrap;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--cc-ink);
  border: 1px solid var(--cc-line);
  background: var(--cc-surface-2);
  font-size: 13px;
}
.studio-home { background: var(--cc-accent-1); color: var(--cc-on-accent); font-weight: 700; border-color: transparent; }
.mascot { width: 48px; height: 48px; flex: none; }
.mascot svg { width: 48px; height: 48px; overflow: visible; }
.mascot .ear { fill: var(--cc-accent-4); }
.mascot .face { fill: #f6d7b0; stroke: #1a1204; stroke-width: 1.4; }
.mascot .muzzle { fill: #ffe8cf; }
.mascot .eye { fill: #1a1204; transform-origin: center; }
.mascot .smile, .mascot .arm, .mascot .band { stroke: #1a1204; }
.mascot .band { stroke: var(--cc-accent-2); }
.mascot[data-shift="night"] .face { fill: #334155; }
.mascot[data-shift="night"] .ear { fill: #64748b; }
.mascot[data-shift="morning"] .face { fill: #ffd7a8; }
.mascot[data-shift="evening"] .face { fill: #e7b48a; }
.mascot[data-shift="evening"] .band { stroke: var(--cc-accent-1); }
.mascot[data-pose="idle"] { animation: bob 2.4s ease-in-out infinite; }
.mascot[data-pose="wave"] .arm { animation: wave 0.7s ease-in-out infinite; transform-origin: 16px 44px; }
.mascot[data-pose="think"] .eye { transform: translateY(-1.5px); }
.mascot[data-pose="celebrate"] { animation: pop 0.8s ease-in-out infinite; }
@keyframes bob { 50% { transform: translateY(-3px); } }
@keyframes wave { 50% { transform: rotate(-18deg); } }
@keyframes pop { 50% { transform: scale(1.08) rotate(-4deg); } }
.theme-quick { display: flex; gap: 6px; flex-wrap: wrap; }
.theme-quick button[aria-pressed="true"] { border-color: var(--cc-accent-1); }
.site-foot {
  margin-top: 36px;
  padding: 18px 0 8px;
  border-top: 1px solid var(--cc-line);
  color: var(--cc-muted);
  font-size: 14px;
}
.site-foot .sig { color: var(--cc-ink); font-family: var(--cc-display); font-size: 20px; margin: 0 0 8px; }
.site-foot .copy { color: var(--cc-ink); font-weight: 700; }
.site-foot .brand-links { margin: 10px 0; }
.foot-links, .next-labs { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.next-labs a, .foot-links a, .site-foot a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid var(--cc-line);
  text-decoration: none;
  color: var(--cc-ink);
}
.reading { max-width: 68ch; }
.flag { background: color-mix(in srgb, var(--cc-accent-1) 16%, transparent); }
.hop { padding: 10px 12px; margin: 8px 0; }
.hop summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; font-weight: 700; }
.explorer-map svg { width: 100%; height: auto; }
.egg-banner {
  position: fixed;
  left: 50%;
  top: 72px;
  transform: translateX(-50%);
  z-index: 80;
  background: var(--cc-accent-1);
  color: var(--cc-on-accent);
  padding: 12px 16px;
  border-radius: 999px;
  font-weight: 700;
}
.actions a.ghost, .actions a.solid { text-decoration: none; display: inline-flex; align-items: center; }
:root[data-theme="futuristic"] body, :root[data-theme="neon"] body, :root[data-theme="gaming"] body { }
:root[data-theme="futuristic"] .view-title, :root[data-theme="neon"] #view-title {
  text-shadow: 0 0 18px color-mix(in srgb, var(--cc-accent-2) 65%, transparent);
}
body::after {
  content: "";
  position: fixed;
  width: 280px;
  height: 280px;
  right: -40px;
  bottom: 80px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, color-mix(in srgb, var(--cc-accent-2) 35%, transparent), transparent 68%);
  animation: floaty 9s ease-in-out infinite;
  z-index: 0;
}
@keyframes floaty { 50% { transform: translate3d(-18px, -24px, 0) scale(1.05); } }
.studio-bar { z-index: 45; }
#stage { scroll-margin-top: 72px; }
@media (max-width: 980px) {
  .rail { top: var(--stack); height: calc(100vh - var(--stack)); }
  .theme-quick { display: flex; width: 100%; overflow-x: auto; }
}
@media (max-width: 640px) {
  .studio-home { padding: 0 8px; }
  .site-foot { padding-bottom: 12px; }
}

.studio-stack {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--cc-bg) 92%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--cc-line);
}
.studio-bar { position: relative; top: auto; border-bottom: 0; background: transparent; }
.campus-menu {
  display: flex;
  gap: 6px;
  align-items: center;
  overflow-x: auto;
  padding: 0 12px 8px;
  scrollbar-width: thin;
}
.campus-menu a {
  flex: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--cc-ink);
  background: var(--cc-surface-2);
  border: 1px solid var(--cc-line);
  font-weight: 700;
  letter-spacing: 0.01em;
}
.campus-menu a[aria-current="page"] {
  background: var(--cc-accent-1);
  color: var(--cc-on-accent);
  border-color: transparent;
}
.campus-menu a:focus-visible, .theme-quick button:focus-visible {
  outline: 3px solid var(--cc-accent-2);
  outline-offset: 2px;
}
.crumbs { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin: 0 0 6px; font-size: 13px; }
.crumbs a { color: var(--cc-accent-2); }
.crumbs [aria-current="page"] { color: var(--cc-ink); font-weight: 700; }
body[data-view="home"] #view-title {
  font-size: clamp(28px, 3.4vw, 42px);
  max-width: none;
  margin: 0 0 8px;
}
body[data-view="home"] #view-title::after { height: 4px; margin-top: 6px; }
body[data-view="home"] #view-kicker { margin-bottom: 2px; }
.fold-hero { margin: 0 0 16px; }
.live-counters { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 10px; }
.live-counters .stat b { font-variant-numeric: tabular-nums; }
.showcase {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}
.showcase-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 168px;
  padding: 10px;
  border-radius: 16px;
  text-decoration: none;
  color: var(--cc-ink);
  background: var(--cc-surface);
  border: 1px solid var(--cc-line);
  box-shadow: var(--cc-shadow);
  overflow: hidden;
}
.showcase-card:focus-visible { outline: 3px solid var(--cc-accent-2); outline-offset: 2px; }
.showcase-kicker {
  margin: 0;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cc-accent-1);
}
.showcase-card svg { width: 100%; height: 108px; display: block; }
.showcase-card figcaption, .showcase-card .meta { margin: 0; color: var(--cc-muted); font-size: 12px; }
.cheat-ports { margin: 0; font-size: 16px; line-height: 1.35; }
.rough-frame { width: 100%; height: 36px; display: block; }
.fold-hero { animation: hero-in 0.7s ease both; }
@keyframes hero-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.track-live {
  display: grid;
  grid-template-columns: 88px 1fr 1.2fr;
  gap: 12px;
  align-items: center;
  margin: 0 0 16px;
}
.parallax-stage {
  width: 88px;
  height: 88px;
  perspective: 700px;
  position: relative;
}
.parallax-back {
  position: absolute;
  inset: 10px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--cc-accent-1), var(--cc-accent-2));
  transform: translateZ(-24px) scale(1.15);
  animation: drift 7s ease-in-out infinite;
}
.parallax-icon {
  position: absolute;
  inset: 8px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: var(--cc-surface-2);
  border: 1px solid var(--cc-line);
  font-family: var(--cc-display);
  font-size: 32px;
  transform: translateZ(22px);
  animation: tilt 6.5s ease-in-out infinite;
}
@keyframes tilt { 50% { transform: translateZ(22px) rotateY(22deg) rotateX(10deg); } }
@keyframes drift { 50% { transform: translate3d(6px, -8px, -24px) scale(1.2); } }
@media (max-width: 1100px) {
  .showcase { grid-template-columns: 1fr 1fr; }
  .track-live { grid-template-columns: 88px 1fr; }
  .track-live figure { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  .showcase-card { min-height: 0; }
  .showcase-card svg { height: 92px; }
  .campus-menu { padding-bottom: 6px; }
}
.campus-menu .theme-quick { width: auto; flex: none; }
@media (max-width: 1100px) {
  .campus-menu { flex-wrap: wrap; overflow-x: visible; row-gap: 4px; }
}
@media (max-width: 820px) {
  :root { --stack: 176px; }
}
@media (max-width: 640px) {
  :root { --stack: 210px; }
  .topbar { margin-bottom: 6px; gap: 6px; }
  .search-launch { min-height: 36px; padding: 6px 8px; }
  .search-launch span, .streak span { display: none; }
  .campus-menu { padding: 0 8px 6px; }
  .campus-menu a { min-height: 44px; padding: 0 8px; font-size: 12px; }
  .main { padding: 8px 10px; }
  body[data-view="home"] #view-kicker { display: none; }
  body[data-view="home"] #view-title { font-size: 22px; margin: 0; line-height: 1.05; }
  body[data-view="home"] #view-title::after { display: none; }
  body[data-view="home"] .crumbs { margin: 0; }
  body[data-view="home"] .live-counters { gap: 4px; margin: 0 0 6px; }
  body[data-view="home"] .stat { min-width: 0; padding: 2px 6px; }
  body[data-view="home"] .showcase { gap: 6px; }
  body[data-view="home"] .showcase-card { padding: 6px; }
  body[data-view="home"] .showcase-card svg { height: 52px; }
  body[data-view="home"] .showcase-kicker { font-size: 11px; letter-spacing: 0.08em; }
  body[data-view="home"] .cheat-ports { font-size: 13px; line-height: 1.25; }
  body[data-view="home"] .rough-frame { height: 16px; }
  body[data-view="home"] .player { display: none; }
}

:root[data-theme="holographic"] {
  color-scheme: dark;
  --cc-bg: #03141c;
  --cc-surface: #062833;
  --cc-surface-2: #0a3a46;
  --cc-ink: #f3fffd;
  --cc-muted: #c9fff4;
  --cc-line: rgba(94, 234, 212, 0.55);
  --cc-accent-1: #5eead4;
  --cc-accent-2: #a78bfa;
  --cc-accent-3: #67e8f9;
  --cc-accent-4: #f0abfc;
  --cc-on-accent: #042028;
  --cc-shadow: 0 0 36px rgba(94, 234, 212, 0.28);
  --glass: color-mix(in srgb, #062833 78%, transparent);
}
:root[data-theme="cyberpunk"] {
  color-scheme: dark;
  --cc-bg: #140014;
  --cc-surface: #240018;
  --cc-surface-2: #320022;
  --cc-ink: #fff6c8;
  --cc-muted: #ffd0e8;
  --cc-line: rgba(252, 238, 10, 0.55);
  --cc-accent-1: #fcee0a;
  --cc-accent-2: #ff003c;
  --cc-accent-3: #00f0ff;
  --cc-accent-4: #ff7ad9;
  --cc-on-accent: #1a0010;
  --cc-shadow: 0 0 0 1px rgba(252, 238, 10, 0.35), 0 18px 40px rgba(255, 0, 60, 0.25);
  --glass: color-mix(in srgb, #240018 80%, transparent);
}
:root[data-theme="sunset"] {
  color-scheme: dark;
  --cc-bg: #1c0c16;
  --cc-surface: #2a1220;
  --cc-surface-2: #3a1828;
  --cc-ink: #fff4ea;
  --cc-muted: #ffd0b8;
  --cc-line: rgba(255, 122, 60, 0.55);
  --cc-accent-1: #ff7a3c;
  --cc-accent-2: #ff2d7b;
  --cc-accent-3: #ffd166;
  --cc-accent-4: #ff8fab;
  --cc-on-accent: #2a0c08;
  --cc-shadow: 0 22px 50px rgba(80, 12, 32, 0.45);
  --glass: color-mix(in srgb, #2a1220 78%, transparent);
}
:root { --stack: 176px; }
.studio-stack {
  background: color-mix(in srgb, var(--cc-bg) 94%, transparent);
}
.campus-menu { flex-wrap: wrap; overflow: visible; row-gap: 6px; }
.lang-pick {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 0 8px;
  font-size: 13px;
  color: var(--cc-muted);
}
.lang-pick select, #theme-toggle, .theme-quick button {
  min-height: 36px;
  border-radius: 999px;
  border: 1px solid var(--cc-line);
  background: var(--cc-surface-2);
  color: var(--cc-ink);
  padding: 0 10px;
}
.mascot .eye { transform-box: fill-box; transform-origin: center; animation: blink 5.2s infinite; }
@keyframes blink { 0%, 90%, 100% { transform: scaleY(1); } 94% { transform: scaleY(0.12); } }
.mascot .gear { display: none; }
.mascot[data-look="1"] .gear-visor { display: inline; }
.mascot[data-look="1"] .band { stroke: var(--cc-accent-1); stroke-width: 3.2; }
.mascot[data-look="2"] .gear-phones { display: inline; }
.mascot[data-look="2"] .ear { fill: var(--cc-accent-1); }
.mascot[data-look="3"] .gear-scarf { display: inline; }
.mascot[data-look="3"] .face { fill: color-mix(in srgb, var(--cc-accent-2) 40%, #f6d7b0); }
.mascot[data-look="4"] .gear-star { display: inline; }
.mascot[data-look="4"] .muzzle { fill: var(--cc-accent-3); }
.mascot-stage {
  position: fixed;
  z-index: 4;
  right: 22px;
  bottom: 28px;
  width: 112px;
  height: 112px;
  pointer-events: none;
  filter: drop-shadow(0 0 16px var(--cc-accent-2));
}
.mascot-stage svg { width: 112px; height: 112px; }
.mascot[data-section="diagrams"] .band,
.mascot[data-section="flows"] .band { stroke-dasharray: 3 2; }

body[data-view="home"] .player { display: none; }
body[data-view="home"] .app { padding-bottom: calc(var(--cc-nav) + 16px); }
body[data-view="home"] .topbar { margin-bottom: 4px; }
body[data-view="home"] #view-kicker { display: none; }
body[data-view="home"] .crumbs { margin: 0; }
body[data-view="home"] #view-title {
  position: relative;
  z-index: 4;
  margin: 0 0 -58px;
  padding: 4px 8px 0 16px;
  pointer-events: none;
  color: #fff;
  text-shadow: 0 0 22px color-mix(in srgb, var(--cc-accent-2) 80%, transparent), 0 2px 8px #000;
}
.hero-stage {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  margin: 0 0 18px;
  border: 0;
  border-radius: 0;
  overflow: visible;
  background: transparent;
  box-shadow: none;
  pointer-events: none;
}
body[data-view="home"] #hero-host {
  position: fixed;
  inset: 0;
  z-index: 0;
}
body[data-view="home"]::before,
body[data-view="home"]::after { opacity: 0.15; }
body[data-view="home"] .studio-stack,
body[data-view="home"] .rail,
body[data-view="home"] .topbar {
  background: color-mix(in srgb, var(--cc-bg) 42%, transparent);
}
body[data-view="home"] .rail { z-index: 2; }
body[data-view="home"] .main { position: relative; z-index: 2; background: transparent; }
body[data-view="home"] .hero-hud {
  position: fixed;
  left: calc(var(--cc-rail) + 16px);
  right: 148px;
  bottom: 18px;
  z-index: 3;
}
#hero-host { position: absolute; inset: 0; }
#hero-host canvas { width: 100%; height: 100%; display: block; }
.hero-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 45%, color-mix(in srgb, var(--cc-accent-2) 28%, transparent), transparent 46%),
    var(--cc-bg);
}
.hero-fallback i {
  position: absolute;
  border-radius: 50%;
  border: 2px solid var(--cc-accent-2);
  box-shadow: 0 0 24px var(--cc-accent-1);
  animation: spin-ring 14s linear infinite;
}
.hero-fallback i:nth-child(1) { width: 180px; height: 180px; }
.hero-fallback i:nth-child(2) { width: 280px; height: 280px; animation-duration: 22s; border-color: var(--cc-accent-1); }
.hero-fallback i:nth-child(3) { width: 380px; height: 380px; animation-duration: 28s; }
.hero-fallback b { position: relative; font-size: 28px; letter-spacing: 0.08em; }
#hero-host[data-mode="webgl"] .hero-fallback { visibility: hidden; }
@keyframes spin-ring { to { transform: rotate(360deg); } }
.hero-hud {
  position: absolute;
  z-index: 2;
  left: 12px;
  right: 12px;
  bottom: 10px;
  padding: 8px 10px;
  border-radius: 16px;
  background: color-mix(in srgb, var(--cc-bg) 48%, transparent);
  border: 1px solid var(--cc-line);
  backdrop-filter: blur(12px);
  pointer-events: none;
}
.hero-hud .stat {
  display: inline-flex;
  gap: 4px;
  align-items: baseline;
  min-width: 0;
  padding: 0 6px;
  background: transparent;
  border: 0;
}
.hero-hud .stat b { display: inline; font-size: 16px; }
.hero-hud .stat span { font-size: 11px; letter-spacing: 0; text-transform: none; }
.hero-hud .live-counters { flex-wrap: nowrap; overflow-x: auto; margin: 0; gap: 2px; }
.hero-hud .ring-wrap, .hero-hud .ring { width: 46px; height: 46px; }
.hero-hud a, .hero-hud button, .hero-hud audio { pointer-events: auto; }
.hero-greet { margin: 0 0 2px; font-family: var(--cc-display); font-size: clamp(20px, 2.4vw, 32px); }
.hud-row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
  .hero-jumps { display: flex; flex-wrap: nowrap; gap: 8px; margin-top: 6px; overflow-x: auto; }
.hero-jumps a {
  pointer-events: auto;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--cc-ink);
  background: color-mix(in srgb, var(--cc-accent-1) 22%, var(--cc-surface));
  border: 1px solid var(--cc-line);
  font-weight: 700;
}
.ring-wrap { position: relative; width: 72px; height: 72px; flex: none; }
.ring { width: 72px; height: 72px; }
.ring-track { fill: none; stroke: var(--cc-line); stroke-width: 6; }
.ring-value { fill: none; stroke: var(--cc-accent-2); stroke-width: 6; stroke-linecap: round; }
.ring-wrap b { position: absolute; inset: 0; display: grid; place-items: center; font-size: 14px; }
.holo-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.holo-card {
  position: relative;
  display: block;
  width: 100%;
  text-align: left;
  color: var(--cc-ink);
  padding: 16px;
  border-radius: 22px;
  border: 1px solid color-mix(in srgb, var(--cc-accent-2) 45%, transparent);
  background: color-mix(in srgb, var(--cc-surface) 74%, transparent);
  box-shadow: var(--cc-shadow);
  backdrop-filter: blur(14px);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.holo-card::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  padding: 2px;
  background: linear-gradient(120deg, var(--cc-accent-1), var(--cc-accent-2), var(--cc-accent-3), var(--cc-accent-1));
  background-size: 280% 280%;
  animation: border-shift 7s linear infinite;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}
@keyframes border-shift { to { background-position: 280% 0; } }
.holo-card:hover { transform: translateY(-6px); }
.holo-card h2 { margin: 6px 0; font-size: 1.25rem; }
canvas.track-icon {
  display: block;
  width: 104px;
  height: 104px;
  aspect-ratio: 1;
  margin-bottom: 6px;
  filter: drop-shadow(0 12px 14px color-mix(in srgb, var(--cc-accent-2) 65%, transparent));
}
.holo-card:hover canvas.track-icon { transform: translateY(-4px) scale(1.04); }
.parallax-stage { width: 112px; height: 112px; }
.parallax-stage .iso-icon { width: 104px; height: 104px; }
.section-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.hop-row { display: flex; gap: 10px; list-style: none; padding: 8px 0 0; margin: 0; flex-wrap: wrap; }
.hop-row li {
  --i: 0;
  flex: 1 1 120px;
  min-height: 84px;
  display: grid;
  place-items: center;
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 800;
  letter-spacing: 0.02em;
  border-radius: 18px;
  background: color-mix(in srgb, var(--cc-accent-2) 18%, var(--cc-surface));
  border: 1px solid var(--cc-line);
  position: relative;
  overflow: hidden;
}
.hop-row li::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--cc-accent-1);
  box-shadow: 0 0 18px var(--cc-accent-1);
  top: 8px;
  animation: packet 2.6s linear infinite;
  animation-delay: calc(var(--i) * 0.28s);
}
@keyframes packet { 0% { left: 8%; } 100% { left: 82%; } }
.ticker { margin: 0; font-size: 64px; font-weight: 800; line-height: 1; color: var(--cc-accent-1); font-variant-numeric: tabular-nums; }
.ticker span { font-size: 28px; }
.flag { display: inline-flex; min-width: 36px; justify-content: center; padding: 2px 6px; border-radius: 8px; font-weight: 800; }
.architect audio { width: min(100%, 560px); display: block; margin: 8px 0; }
.figure-grid:has(.atlas-card) { grid-template-columns: 1fr; }
.atlas-card { padding: 8px; }
.atlas-open {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  position: relative;
  cursor: zoom-in;
}
.atlas-portrait { display: none; }
.atlas-open, .lightbox-stage, .track-live figure, #chart-list .figure { overflow-x: auto; }
.atlas-wide svg, #chart-list svg {
  width: 100%;
  min-width: 760px;
  height: auto;
  display: block;
  border-radius: 16px;
}
.atlas-wide text, #chart-list text { font-size: 16px !important; }
.atlas-open svg > rect:first-of-type,
.lightbox-stage svg > rect:first-of-type,
.track-live svg > rect:first-of-type,
#chart-list svg > rect:first-of-type { fill: #16041f !important; }
.atlas-open svg rect[fill="#131d31"],
.lightbox-stage svg rect[fill="#131d31"],
.track-live svg rect[fill="#131d31"],
#chart-list svg rect[fill="#131d31"] { fill: #2a1038 !important; }
.chart-live { display: grid; gap: 16px; }
.atlas-open-label {
  position: absolute;
  right: 12px;
  top: 12px;
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--cc-accent-1);
  color: var(--cc-on-accent);
  font-weight: 800;
}
.lightbox { width: min(1120px, 96vw); max-height: 94vh; border: 0; padding: 0; background: transparent; color: var(--cc-ink); }
.lightbox::backdrop { background: rgba(2, 0, 12, 0.78); }
.lightbox-card { background: var(--cc-bg); border: 1px solid var(--cc-line); border-radius: 20px; padding: 12px; max-height: 94vh; overflow: auto; }
.lightbox-bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 8px; }
.lightbox-bar button { min-height: 40px; }
.legend { margin: 8px 0 0; }
.chart-host { position: relative; min-height: 240px; }
.chart-host svg { width: 100%; height: auto; display: block; }
.chart-tip {
  position: absolute;
  z-index: 3;
  opacity: 0;
  pointer-events: none;
  padding: 6px 8px;
  border-radius: 10px;
  background: var(--cc-surface);
  border: 1px solid var(--cc-accent-2);
  color: var(--cc-ink);
  font-size: 13px;
}
@media (max-width: 1100px) {
  :root { --stack: 228px; }
}
@media (max-width: 980px) {
  body[data-view="home"] .hero-hud { left: 12px; right: 88px; bottom: 78px; }
}
@media (max-width: 820px) {
  :root { --stack: 168px; }
}
@media (max-width: 1100px) {
  .atlas-wide { display: none; }
  .atlas-portrait { display: block; }
  .atlas-open, .lightbox-stage, .track-live figure { overflow-x: visible; }
  .atlas-portrait svg {
    width: 100%;
    min-width: 0;
    height: auto;
    display: block;
  }
}
@media (max-width: 640px) {
  :root { --stack: 84px; }
  .studio-bar { flex-wrap: nowrap; padding: 2px 6px; gap: 4px; min-height: 0; }
  .studio-home, .studio-links a { min-height: 28px; padding: 0 6px; font-size: 11px; }
  .studio-links { flex-wrap: nowrap; }
  #mascot, #mascot svg { width: 28px; height: 28px; }
  .campus-menu {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 0 6px 2px;
    gap: 4px;
    max-height: 36px;
  }
  .campus-menu a, .lang-pick, #theme-toggle, .theme-quick button { min-height: 44px; font-size: 11px; padding: 0 6px; }
  .campus-menu .theme-quick { flex: none; width: auto; max-width: none; flex-wrap: nowrap; overflow: visible; }
  .lang-pick { font-size: 0; }
  .mascot-stage, .mascot-stage svg { width: 72px; height: 72px; }
  .mascot-stage { right: 8px; bottom: 76px; }
  body[data-view="home"] #view-title { font-size: 26px; margin: 0 0 -42px; }
  body[data-view="home"] .hero-hud { left: 8px; right: 8px; bottom: 72px; padding: 6px 8px; }
  .hero-greet { font-size: 16px; }
  .hero-jumps a { min-height: 32px; padding: 0 8px; font-size: 12px; }
  .hop-row { flex-direction: column; }
  .hop-row li { font-size: 22px; min-height: 56px; flex-basis: auto; }
  canvas.track-icon { width: 84px; height: 84px; }
  #chart-list svg { min-width: 0; }
}
:root[data-motion="reduce"] .holo-card::before,
:root[data-motion="reduce"] .hop-row li::after,
:root[data-motion="reduce"] .hero-fallback i,
:root[data-motion="reduce"] .mascot .eye { animation: none; }

.lang-banner {
  margin: 0 0 12px;
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid var(--cc-line);
  background: color-mix(in srgb, var(--cc-accent-2) 18%, transparent);
  font-weight: 700;
}

@media (min-width: 641px) {
  :root { --stack: 148px; }
  .studio-bar {
    padding: 4px 8px;
    gap: 6px;
    min-height: 0;
  }
  .studio-home, .studio-links a, .brand-link {
    min-height: 44px;
    padding: 0 10px;
    font-size: 13px;
  }
  #mascot, #mascot svg { width: 32px; height: 32px; }
  .campus-menu {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 0 8px 6px;
    gap: 6px;
    max-height: none;
  }
  .campus-menu a,
  .lang-pick,
  #theme-toggle,
  .theme-quick button,
  .menu-search input {
    min-height: 44px;
    padding: 4px 10px;
    font-size: 13px;
  }
  .lang-pick { min-height: 30px; font-size: 12px; gap: 4px; }
  .campus-menu .theme-quick {
    flex: none;
    flex-wrap: nowrap;
    width: auto;
    overflow: visible;
  }
}

html { scroll-behavior: smooth; }
.phone-bar, .phone-sheet { display: none; }
.reveal {
  opacity: 0;
  transform: translateY(16px);
}
.reveal.revealed {
  opacity: 1;
  transform: none;
  transition: opacity 0.5s ease, transform 0.5s ease;
}

@media (max-width: 640px) {
  :root {
    --stack: calc(56px + env(safe-area-inset-top, 0px));
    --quick: calc(56px + env(safe-area-inset-bottom, 0px));
    --cc-nav: var(--quick);
    --cc-player: 168px;
  }
  html, body { overflow-x: hidden; max-width: 100%; }
  body { padding-top: var(--stack); }
  body.menu-open { overflow: hidden; }
  .studio-stack { display: none !important; }
  .topbar { display: none; }
  .phone-bar {
    display: flex;
    position: fixed;
    z-index: 60;
    top: 0;
    left: 0;
    right: 0;
    height: var(--stack);
    box-sizing: border-box;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: env(safe-area-inset-top, 0px) 8px 0;
    background: color-mix(in srgb, var(--cc-bg) 94%, transparent);
    border-bottom: 1px solid var(--cc-line);
    backdrop-filter: blur(14px);
  }
  .phone-logo, .phone-menu-btn, #phone-close, .phone-sections a, .bottom-nav a, .bottom-nav button, .phone-tracks .track-link {
    min-height: 48px;
    min-width: 48px;
  }
  .phone-logo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--cc-ink);
    text-decoration: none;
    font-weight: 800;
    padding: 0 8px;
  }
  .phone-logo .mark { width: 28px; height: 28px; display: inline-flex; }
  .phone-logo svg { width: 28px; height: 28px; }
  .phone-menu-btn, #phone-close, #quick-menu {
    border: 1px solid var(--cc-line);
    background: var(--cc-surface-2);
    color: var(--cc-ink);
    border-radius: 14px;
    font-weight: 800;
  }
  .phone-menu-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0 14px;
  }
  .burger { display: inline-flex; flex-direction: column; gap: 4px; }
  .burger i { display: block; width: 16px; height: 2px; background: currentColor; border-radius: 2px; }
  .phone-sheet {
    display: flex;
    flex-direction: column;
    position: fixed;
    z-index: 80;
    inset: 0;
    overflow-x: hidden;
    overflow-y: auto;
    box-sizing: border-box;
    padding: calc(8px + env(safe-area-inset-top, 0px)) 12px calc(12px + env(safe-area-inset-bottom, 0px));
    background: var(--cc-bg);
    color: var(--cc-ink);
  }
  .phone-sheet[hidden] { display: none !important; }
  .phone-sheet .brand-links { flex-wrap: wrap; overflow: visible; margin: 4px 0 12px; }
  .phone-sheet .brand-link { flex: 1 1 148px; justify-content: flex-start; min-height: 48px; }
  .phone-sheet-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    position: sticky;
    top: 0;
    z-index: 2;
    background: var(--cc-bg);
    padding-bottom: 8px;
  }
  .phone-sheet-head p { margin: 0; font-family: var(--cc-display); font-size: 28px; }
  #phone-close, #sheet-search { padding: 0 16px; min-height: 48px; }
  .phone-sections { display: grid; gap: 8px; }
  .phone-sections a {
    display: flex;
    align-items: center;
    padding: 0 14px;
    border-radius: 14px;
    text-decoration: none;
    color: var(--cc-ink);
    background: var(--cc-surface);
    border: 1px solid var(--cc-line);
    font-weight: 700;
  }
  .phone-sections a[aria-current="page"] {
    background: var(--cc-accent-1);
    color: var(--cc-on-accent);
    border-color: transparent;
  }
  .phone-tracks { display: grid; gap: 6px; margin-top: 12px; }
  .phone-tracks .track-link {
    width: 100%;
    text-align: left;
    border-radius: 14px;
  }
  .phone-prefs { display: grid; gap: 8px; margin: 14px 0 8px; }
  .phone-prefs .lang-pick, .phone-prefs select, .phone-prefs .theme-quick button {
    min-height: 48px;
    font-size: 16px;
  }
  .phone-prefs .lang-pick { display: grid; gap: 6px; }
  .phone-prefs select, .phone-prefs .theme-quick button { width: 100%; }
  .phone-prefs .theme-quick { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; width: 100%; overflow: visible; }
  .bottom-nav {
    height: var(--quick);
    box-sizing: border-box;
    padding-bottom: env(safe-area-inset-bottom, 0px);
    z-index: 45;
    background: color-mix(in srgb, var(--cc-bg) 96%, transparent);
  }
  .bottom-nav a, .bottom-nav button {
    border: 0;
    background: transparent;
    color: var(--cc-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 12px;
    font-weight: 800;
  }
  .bottom-nav a[aria-current="page"], .bottom-nav button[aria-current="page"] { color: var(--cc-accent-1); }
  .bottom-nav a:focus-visible, .bottom-nav button:focus-visible, .phone-sections a:focus-visible, .phone-menu-btn:focus-visible {
    outline: 3px solid var(--cc-accent-1);
    outline-offset: 2px;
  }
  .mascot-stage { bottom: calc(var(--quick) + 12px); }
  body[data-view="home"] #hero-host {
    position: relative;
    inset: auto;
    width: 100%;
    height: 42vh;
    z-index: 0;
  }
  body[data-view="home"] .hero-stage {
    position: relative;
    min-height: 0;
    height: auto;
    margin: 0;
  }
  body[data-view="home"] .hero-hud {
    position: relative;
    left: auto;
    right: auto;
    bottom: auto;
    top: auto;
    margin: 8px 0 0;
    max-width: 100%;
  }
  body[data-view="home"] #view-title { margin: 0 0 8px; font-size: 28px; }
  .site-foot { padding-bottom: 8px; }
  .bottom-nav a, .bottom-nav button {
    flex-direction: column;
    gap: 2px;
    min-height: 56px;
    font-size: 11px;
  }
  .guide {
    bottom: calc(var(--quick) + 12px);
    right: 8px;
    z-index: 55;
    max-height: calc(100dvh - var(--stack) - var(--quick) - 16px);
  }
  .guide-panel { width: min(360px, calc(100vw - 16px)); max-height: calc(100dvh - var(--stack) - var(--quick) - 72px); }
}

.menu-copy { display: grid; line-height: 1.15; min-width: 0; }
.menu-copy strong { font-size: 13px; }
.menu-copy small { font-size: 12px; font-weight: 600; color: var(--cc-muted); white-space: nowrap; }
@media (max-width: 640px) {
  .menu-copy small { white-space: normal; }
}
.campus-menu a, .phone-sections a { gap: 8px; }
.campus-menu a[aria-current="page"] .menu-copy small,
.phone-sections a[aria-current="page"] .menu-copy small { color: inherit; }
.menu-icon { width: 20px; height: 20px; flex: none; }
.menu-search {
  display: grid;
  gap: 2px;
  flex: none;
  font-size: 12px;
  font-weight: 700;
  color: var(--cc-muted);
}
.menu-search input {
  min-height: 44px;
  min-width: 44px;
  width: 180px;
  border-radius: 999px;
  border: 1px solid var(--cc-line);
  background: var(--cc-surface);
  color: var(--cc-ink);
  padding: 0 12px;
}
.guide-target { outline: 3px solid var(--cc-accent-1); outline-offset: 3px; }
.guide {
  position: fixed;
  z-index: 55;
  right: 16px;
  bottom: calc(var(--cc-player) + var(--cc-nav) + 12px);
  width: min(380px, calc(100vw - 24px));
  max-height: calc(100dvh - var(--cc-player) - var(--cc-nav) - 24px);
  display: flex;
  flex-direction: column-reverse;
  align-items: flex-end;
}
.guide-open, .guide-close, .guide-send, .guide-chip {
  min-height: 44px;
  min-width: 44px;
  border-radius: 999px;
  border: 1px solid var(--cc-line);
  background: var(--cc-surface-2);
  color: var(--cc-ink);
  font-weight: 800;
}
.guide-open {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  background: var(--cc-accent-1);
  color: var(--cc-on-accent);
  border-color: transparent;
}
.guide-panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto auto auto;
  gap: 8px;
  margin-bottom: 8px;
  padding: 10px;
  width: 100%;
  max-height: min(70dvh, calc(100dvh - 160px));
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid var(--cc-line);
  background: color-mix(in srgb, var(--cc-bg) 96%, transparent);
  box-shadow: var(--cc-shadow);
}
.guide-panel[hidden] { display: none; }
.guide-head, .guide-form, .guide-chips { display: flex; gap: 8px; align-items: center; }
.guide-head p { margin: 0; font-family: var(--cc-display); font-size: 22px; flex: 1; }
.guide-log { overflow: auto; display: grid; gap: 8px; align-content: start; min-height: 0; max-height: 42vh; }
.guide-row { display: flex; }
.guide-row.user { justify-content: flex-end; }
.guide-bubble {
  max-width: 92%;
  padding: 8px 10px;
  border-radius: 14px;
  background: var(--cc-surface-2);
  border: 1px solid var(--cc-line);
}
.guide-row.user .guide-bubble { background: color-mix(in srgb, var(--cc-accent-2) 24%, var(--cc-surface)); }
.guide-cite, .guide-note { margin: 6px 0 0; font-size: 12px; color: var(--cc-muted); }
.guide-chips { flex-wrap: wrap; }
.guide-chip { padding: 0 12px; }
.guide-form input {
  flex: 1;
  min-height: 44px;
  min-width: 0;
  border-radius: 999px;
  border: 1px solid var(--cc-line);
  background: var(--cc-surface);
  color: var(--cc-ink);
  padding: 0 12px;
}
.guide-typing::after { content: "..."; }


/* Floating glowing chrome shared with the study site. */
.studio-stack {
  top: 10px;
  margin: 10px 12px 12px;
  border-radius: 22px;
  border: 1px solid color-mix(in srgb, var(--cc-accent-2) 55%, #fff);
  box-shadow:
    0 18px 40px rgba(0, 0, 0, 0.32),
    0 0 24px color-mix(in srgb, var(--cc-accent-2) 50%, transparent);
}
.player {
  border-radius: 22px;
  box-shadow:
    0 16px 36px rgba(0, 0, 0, 0.35),
    0 0 20px color-mix(in srgb, var(--cc-accent-2) 42%, transparent);
}
.campus-menu a,
.brand-link,
.bottom-nav a,
.bottom-nav button,
.phone-menu-btn {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
:root:not([data-motion="reduce"]) .campus-menu a:hover,
:root:not([data-motion="reduce"]) .brand-link:hover,
:root:not([data-motion="reduce"]) .bottom-nav a:hover,
:root:not([data-motion="reduce"]) .bottom-nav button:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 18px color-mix(in srgb, var(--cc-accent-1) 35%, transparent);
}
.disclaimer-panel {
  display: block;
  margin: 12px 0;
  padding: 16px 18px;
  text-align: left;
  border-radius: 18px;
  border: 2px solid #0f766e;
  background: linear-gradient(135deg, #dcfce7 0%, #d1fae5 38%, #dbeafe 100%);
  color: #0b1f2a;
  box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.15), 0 10px 28px rgba(15, 118, 110, 0.18);
}
.disclaimer-panel h2 { margin: 0 0 6px; color: #052e2b; font-size: 1.1rem; }
.disclaimer-panel p { margin: 0; color: #0b1f2a; line-height: 1.5; }
.disclaimer-panel a { color: #1e3a8a; font-weight: 800; }
:root:not([data-motion="reduce"]) body {
  background-image:
    radial-gradient(circle, rgba(34, 231, 255, 0.8) 1.2px, transparent 1.8px),
    radial-gradient(circle, rgba(255, 45, 149, 0.65) 1.2px, transparent 1.8px),
    radial-gradient(900px 420px at 0% -10%, color-mix(in srgb, var(--cc-accent-1) 22%, transparent), transparent 55%),
    radial-gradient(800px 480px at 100% 0%, color-mix(in srgb, var(--cc-accent-3) 18%, transparent), transparent 50%),
    linear-gradient(var(--cc-bg), var(--cc-bg));
  background-size: 150px 170px, 200px 220px, auto, auto, auto;
  animation: campus-drift 24s linear infinite;
}
@keyframes campus-drift {
  to { background-position: 0 -170px, 36px -220px, 0 0, 0 0, 0 0; }
}
@media (max-width: 640px) {
  .hero-fallback i:nth-child(1) { width: 120px; height: 120px; }
  .hero-fallback i:nth-child(2) { width: 190px; height: 190px; }
  .hero-fallback i:nth-child(3) { width: 250px; height: 250px; }
  .hero-hud .live-counters { flex-wrap: wrap; overflow: visible; row-gap: 4px; }
  body[data-view="home"] .hero-hud { padding-right: 108px; }
  body[data-view="home"] .caption { padding-right: 84px; }
  .hero-jumps { flex-wrap: nowrap; overflow-x: auto; margin-right: 124px; }
  body[data-view="home"] #hero-host { height: 28vh; }
  #stage:focus { outline: none; }
  .phone-bar {
    top: 8px;
    left: 8px;
    right: 8px;
    width: auto;
    height: auto;
    min-height: 56px;
    border-radius: 18px;
    border: 1px solid color-mix(in srgb, var(--cc-accent-2) 45%, #fff);
    box-shadow:
      0 14px 30px rgba(0, 0, 0, 0.35),
      0 0 18px color-mix(in srgb, var(--cc-accent-2) 45%, transparent);
  }
  body { padding-top: calc(78px + env(safe-area-inset-top, 0px)); }
  .bottom-nav {
    left: 8px;
    right: 8px;
    bottom: calc(8px + env(safe-area-inset-bottom, 0px));
    width: auto;
    height: 64px;
    border-radius: 20px;
    border: 1px solid color-mix(in srgb, var(--cc-accent-1) 45%, #fff);
    box-shadow:
      0 14px 30px rgba(0, 0, 0, 0.4),
      0 0 18px color-mix(in srgb, var(--cc-accent-1) 40%, transparent);
    padding-bottom: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  body { animation: none; }
  .campus-menu a:hover,
  .brand-link:hover,
  .bottom-nav a:hover,
  .bottom-nav button:hover { transform: none; }
}
:root[data-motion="reduce"] body { animation: none; }