:root {
  color-scheme: dark;
  --bg: #050505;
  --panel: #0c0c0e;
  --text: #d8d8d8;
  --muted: #8a8a8a;
  --line: #222;
  --accent: #04d3ff;
  --hot: #ff2e01;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  line-height: 1.5;
}

body {
  overflow: auto;
}

a {
  color: var(--accent);
}

code,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
}

pre {
  overflow: auto;
  padding: 16px;
  background: #000;
  border: 1px solid var(--line);
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 560;
  letter-spacing: -0.03em;
}

header p {
  margin: 0 0 28px;
  color: var(--muted);
  max-width: 62ch;
}

.demo {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.8fr);
  gap: 16px;
  margin-bottom: 40px;
}

.stage {
  position: relative;
  background: #000;
  border: 1px solid #333;
  min-height: 420px;
}

.stage canvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 420px;
}

.controls {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 14px 14px 8px;
  max-height: 560px;
  overflow: auto;
}

.controls h2 {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
  font-size: 12px;
}

.row label {
  grid-column: 1 / -1;
  color: #bbb;
}

.row input[type="range"] {
  width: 100%;
}

.row output {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.row input[type="checkbox"] {
  justify-self: start;
}

.actions {
  display: flex;
  gap: 8px;
  margin: 12px 0 6px;
}

button {
  appearance: none;
  border: 1px solid #444;
  background: #111;
  color: var(--text);
  padding: 6px 10px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

h2 {
  margin: 32px 0 10px;
  font-size: 18px;
  font-weight: 560;
}

h3 {
  margin: 20px 0 8px;
  font-size: 14px;
}

p,
li {
  color: #c8c8c8;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}

th {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 12px 0 28px;
}

a.download {
  display: inline-block;
  padding: 8px 14px;
  background: var(--accent);
  color: #000;
  text-decoration: none;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

a.download:hover {
  filter: brightness(1.08);
}

@media (max-width: 860px) {
  .demo {
    grid-template-columns: 1fr;
  }
}