/* Shared chrome for the demo routes.
   Tuned for screen capture: big type, high contrast, no thin hairlines that vanish in a GIF. */

:root {
  --bg: #0a0b10;
  --ink: #eef0f6;
  --dim: #97a0b8;
  --violet: #c9a4ff;
  --violet-deep: #8a5cff;
  --good: #6ee7a8;
  --bad: #ff7a8a;
  --panel: rgba(14, 16, 26, 0.82);
  --line: rgba(150, 160, 200, 0.18);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  -webkit-font-smoothing: antialiased;
}

#stage { position: fixed; inset: 0; }
#stage canvas { display: block; }

/* ---------- caption (top-left) ---------- */

.caption {
  position: fixed;
  left: 22px;
  top: 20px;
  z-index: 5;
  max-width: 420px;
  pointer-events: none;
}
.caption h1 {
  margin: 0;
  font-size: 19px;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.caption p {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--dim);
}
.caption .home {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--violet);
  text-decoration: none;
  opacity: 0.75;
  pointer-events: auto;
}
.caption .home:hover { opacity: 1; }

/* ---------- control panel (top-right) ---------- */

.panel {
  position: fixed;
  right: 22px;
  top: 20px;
  z-index: 5;
  width: 268px;
  padding: 14px 16px 16px;
  border-radius: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  font-size: 13px;
}
.panel h2 {
  margin: 0 0 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
}
.panel .row { margin-bottom: 13px; }
.panel .row:last-child { margin-bottom: 0; }
.panel label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
  color: var(--ink);
}
.panel label .val {
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--violet);
}

.panel input[type='range'] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 4px;
  background: rgba(180, 190, 230, 0.22);
  outline: none;
}
.panel input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--violet);
  border: none;
  cursor: pointer;
  box-shadow: 0 0 0 4px rgba(201, 164, 255, 0.16);
}
.panel input[type='range']::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--violet);
  border: none;
  cursor: pointer;
}

.panel .check {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 9px;
  cursor: pointer;
  user-select: none;
  margin-bottom: 0;
}
.panel .check input { display: none; }
.panel .check .box {
  width: 15px;
  height: 15px;
  flex: none;
  border-radius: 4px;
  border: 1.5px solid rgba(180, 190, 230, 0.4);
  position: relative;
  transition: background 0.14s, border-color 0.14s;
}
.panel .check input:checked + .box {
  background: var(--violet);
  border-color: var(--violet);
}
.panel .check input:checked + .box::after {
  content: '';
  position: absolute;
  left: 4.5px;
  top: 1px;
  width: 4px;
  height: 8px;
  border: solid #1a0f2a;
  border-width: 0 2px 2px 0;
  transform: rotate(43deg);
}

.panel button {
  width: 100%;
  padding: 9px 12px;
  border: none;
  border-radius: 9px;
  font: inherit;
  font-weight: 650;
  font-size: 12.5px;
  color: #1a0f2a;
  background: linear-gradient(180deg, #dfc2ff, #b287f0);
  cursor: pointer;
}
.panel button:hover { filter: brightness(1.06); }
.panel button:active { transform: translateY(1px); }
.panel button.ghost {
  background: rgba(255, 255, 255, 0.07);
  color: var(--ink);
  border: 1px solid var(--line);
}

.panel .seg { display: flex; gap: 6px; }
.panel .seg button { flex: 1; }

.panel .note {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.55;
  color: var(--dim);
}
.panel .note b { color: var(--violet); font-weight: 600; }

/* ---------- readouts (bottom-left) ---------- */

.readouts {
  position: fixed;
  left: 22px;
  bottom: 22px;
  z-index: 5;
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 13px 16px;
  border-radius: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  font-size: 12.5px;
  pointer-events: none;
}
.readouts .r {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  font-variant-numeric: tabular-nums;
}
.readouts .r span:first-child { color: var(--dim); }
.readouts .r span:last-child { color: var(--ink); font-weight: 600; }
.readouts .r.hi span:last-child { color: var(--violet); }
.readouts .r.good span:last-child { color: var(--good); }
.readouts .r.bad span:last-child { color: var(--bad); }

/* ---------- split-screen labels ---------- */

.splits {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 96px;
  z-index: 4;
  display: flex;
  pointer-events: none;
}
.splits > div { flex: 1; text-align: center; }
.splits .tag {
  display: inline-block;
  padding: 6px 15px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 650;
  background: rgba(14, 16, 26, 0.8);
  border: 1px solid var(--line);
}
.splits .tag.no { color: var(--bad); border-color: rgba(255, 122, 138, 0.35); }
.splits .tag.yes { color: var(--good); border-color: rgba(110, 231, 168, 0.35); }
.splits .sub {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  color: var(--dim);
}

/* ---------- demo index ---------- */

.index-page {
  overflow: auto;
  display: block;
  padding: 64px 32px 96px;
}
.index-wrap { max-width: 940px; margin: 0 auto; }
.index-wrap h1 { font-size: 30px; margin: 0 0 8px; letter-spacing: -0.02em; }
.index-wrap .lede { color: var(--dim); font-size: 15px; line-height: 1.6; max-width: 640px; margin: 0 0 40px; }
.index-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.index-grid a {
  display: block;
  padding: 18px 20px;
  border-radius: 14px;
  text-decoration: none;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
}
.index-grid a:hover {
  background: rgba(201, 164, 255, 0.07);
  border-color: rgba(201, 164, 255, 0.35);
  transform: translateY(-2px);
}
.index-grid .n {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--violet);
  opacity: 0.8;
}
.index-grid h3 { margin: 7px 0 6px; font-size: 16px; font-weight: 620; }
.index-grid p { margin: 0; font-size: 13px; line-height: 1.55; color: var(--dim); }

/* ---------- fatal ---------- */

.fatal {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 9;
  max-width: 460px;
  padding: 18px 22px;
  border-radius: 12px;
  background: rgba(28, 10, 14, 0.9);
  border: 1px solid rgba(255, 122, 138, 0.4);
  color: #ffb4bd;
  font-size: 13.5px;
  line-height: 1.55;
}