:root {
  --bg: #e7e4df;
  --panel: #f7f5f2;
  --ink: #23211e;
  --muted: #77726b;
  --line: #d9d4cc;
  --accent: #3f5f8a;
  --accent-ink: #fff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1e21;
    --panel: #26272b;
    --ink: #ecebe8;
    --muted: #9b978f;
    --line: #3a3b40;
    --accent: #8fb0dc;
    --accent-ink: #14161a;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--ink); font: 14px/1.5 system-ui, "Hiragino Sans", sans-serif; }
.app { display: grid; grid-template-columns: 1fr 300px; height: 100vh; }
.stage { position: relative; min-height: 0; }
canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.status { position: absolute; top: 12px; left: 16px; color: var(--muted); font-size: 12px; }
.hint { position: absolute; bottom: 10px; left: 16px; right: 16px; color: var(--muted); font-size: 12px; }
.panel { background: var(--panel); border-left: 1px solid var(--line); padding: 16px; overflow-y: auto; }
h1 { font-size: 15px; letter-spacing: .06em; margin: 0 0 12px; }
h2 { font-size: 12px; color: var(--muted); font-weight: 600; letter-spacing: .08em; margin: 0 0 8px; }
section { padding: 12px 0; border-top: 1px solid var(--line); }
.row { display: flex; flex-wrap: wrap; gap: 6px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-bottom: 10px; }
button { font: inherit; font-size: 13px; padding: 6px 10px; border: 1px solid var(--line); border-radius: 6px; background: transparent; color: var(--ink); cursor: pointer; }
button:hover { border-color: var(--accent); }
button.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.slider { display: grid; grid-template-columns: 72px 1fr 40px; align-items: center; gap: 8px; margin: 6px 0; font-size: 13px; }
.slider output { text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
.check { display: flex; align-items: center; gap: 6px; margin: 4px 0; font-size: 13px; }
.meter { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; margin: 12px 0 8px; }
#meter-bar { height: 100%; width: 0; background: var(--accent); transition: width 40ms linear; }
.vowels { display: flex; gap: 6px; margin-bottom: 6px; }
.vowels span { flex: 1; text-align: center; padding: 3px 0; border: 1px solid var(--line); border-radius: 4px; color: var(--muted); }
.vowels span.on { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }
.pick { display: grid; grid-template-columns: 4em 1fr; align-items: center; gap: 6px; font-size: 13px; margin-top: 6px; }
.pick select { min-width: 0; width: 100%; padding: 5px 6px; font: inherit; color: var(--ink); background: var(--panel); border: 1px solid var(--line); border-radius: 6px; }
.pick select:disabled { color: var(--muted); }
.note { color: var(--muted); font-size: 12px; margin: 8px 0 0; word-break: break-all; }
@media (max-width: 760px) {
  .app { grid-template-columns: 1fr; grid-template-rows: 60vh auto; height: auto; }
  .panel { border-left: 0; border-top: 1px solid var(--line); }
}

.manual .slider { grid-template-columns: 92px 1fr 40px; }
#manual-reset { margin-top: 6px; }

.cam { position: absolute; top: 12px; right: 12px; width: 180px; border-radius: 6px; border: 1px solid var(--line); transform: scaleX(-1); background: #000; }
#track-status.found { color: var(--ink); }

details > summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 6px; }
details > summary::-webkit-details-marker { display: none; }
details > summary::before { content: "▸"; color: var(--muted); font-size: 11px; transition: transform .15s; }
details[open] > summary::before { transform: rotate(90deg); }
details > summary h2 { margin: 0; }
details[open] > summary { margin-bottom: 8px; }