:root {
  --bg: #f6f2ea;
  --panel: #fffdf8;
  --ink: #1f1a16;
  --muted: #6b6258;
  --line: #ddd4c6;
  --accent: #c2491d;
  --focus: #1d6fc2;
  --band: rgba(194, 73, 29, 0.14);
  --bars: rgba(29, 111, 194, 0.45);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121014;
    --panel: #1b181d;
    --ink: #eee7dd;
    --muted: #a99f93;
    --line: #34303a;
    --accent: #f08a4b;
    --focus: #6fb3ff;
    --band: rgba(240, 138, 75, 0.18);
    --bars: rgba(111, 179, 255, 0.5);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
}

.top, .foot { padding: 12px 16px; }
.top { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.top h1 { margin: 0; font-size: 1.5rem; letter-spacing: 0.02em; }
.tag { margin: 0; color: var(--muted); }
.foot { color: var(--muted); font-size: 0.85rem; }
a { color: var(--accent); }

.layout {
  display: grid;
  grid-template-columns: minmax(0, calc(100vh - 170px)) 320px;
  justify-content: center;
  gap: 24px;
  padding: 0 16px;
  align-items: start;
}

@media (max-width: 860px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
}

.stage canvas {
  display: block;
  width: 100%;
  min-width: 240px;
  aspect-ratio: 1;
  height: auto;
  background: #000;
  border-radius: 6px;
  touch-action: none;
  cursor: crosshair;
}

#inspector { display: block; width: 100%; height: auto; aspect-ratio: 3 / 2; }

.help, .note { color: var(--muted); font-size: 0.85rem; margin: 6px 0; }

.bar, .row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0; }
.inline { display: inline-flex; gap: 6px; align-items: center; }

.readouts { display: flex; flex-wrap: wrap; gap: 6px 20px; margin: 4px 0 12px; font-variant-numeric: tabular-nums; }
.readouts div { display: flex; gap: 6px; }
.readouts dt { color: var(--muted); }
.readouts dd { margin: 0; }

.panel { display: grid; gap: 12px; }

fieldset {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 8px 12px 10px;
}

legend { font-weight: 600; padding: 0 4px; }

label { display: block; margin: 6px 0; }
.chip { display: inline-flex; gap: 4px; align-items: center; margin: 0; }

input[type="range"], select, input[type="text"] { width: 100%; }
.inline input[type="range"] { width: 120px; }
output { font-variant-numeric: tabular-nums; color: var(--muted); }

select, input[type="text"], button {
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 8px;
}

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

:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

input[aria-invalid="true"] { border-color: #d33; }

code { font-size: 0.9em; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}