:root {
  --bg: #f4ede1; --ink: #2b2420; --mute: #7a6d61; --line: #dccfbd;
  --card: #fbf7f0; --accent: #b4562f; --accent-ink: #fff;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #1b1714; --ink: #efe6da; --mute: #a89a8b; --line: #3a322b; --card: #241f1b; --accent: #e07a4c; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.55 -apple-system, "Apple SD Gothic Neo", "Pretendard", system-ui, sans-serif; }
header { display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 20px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
h1 { margin: 0; font-size: 20px; letter-spacing: -0.02em; }
h1 small { color: var(--mute); font-weight: 400; font-size: 13px; margin-left: 6px; }
h2 { font-size: 13px; margin: 0 0 8px; color: var(--mute); font-weight: 600; }
h3 { font-size: 13px; margin: 12px 0 6px; }
nav { display: flex; gap: 6px; }
button { font: inherit; color: var(--ink); background: var(--card); border: 1px solid var(--line);
  border-radius: 8px; padding: 6px 10px; cursor: pointer; }
button:hover { border-color: var(--mute); }
button.on, .tab.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); width: 100%; margin-top: 6px; }
.page { display: none; }
.page.on { display: grid; }
#play { grid-template-columns: minmax(0, 1fr) 320px; gap: 20px; padding: 20px; max-width: 1240px; margin: 0 auto; }
.stage { min-width: 0; }
.canvas-wrap { position: relative; aspect-ratio: 1; width: 100%; max-width: calc(100vh - 120px); margin: 0 auto;
  background: #000; border-radius: 10px; overflow: hidden; }
canvas#cv { width: 100%; height: 100%; display: block; image-rendering: pixelated; touch-action: none; cursor: crosshair; }
.badge { position: absolute; left: 10px; top: 10px; background: rgba(0,0,0,.55); color: #fff;
  font-size: 12px; padding: 3px 9px; border-radius: 99px; pointer-events: none; }
.hint { text-align: center; color: var(--mute); font-size: 13px; margin: 8px 0 0; }
.panel { display: flex; flex-direction: column; gap: 12px; }
.group { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px; }
.group label { display: flex; justify-content: space-between; font-size: 13px; color: var(--mute); }
.group label b { color: var(--ink); }
input[type=range] { width: 100%; accent-color: var(--accent); }
.presets { display: flex; flex-wrap: wrap; gap: 6px; }
.row { display: flex; gap: 6px; margin-top: 8px; }
.row button { flex: 1; }
.seg { display: flex; gap: 4px; margin-bottom: 6px; flex-wrap: wrap; }
.seg button { flex: 1; font-size: 13px; padding: 5px 6px; }
.note { font-size: 13px; color: var(--mute); margin: 8px 0 0; }
.hidden { display: none !important; }
.stats dl { display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; margin: 8px 0 0; font-size: 13px; }
.stats dt { color: var(--mute); }
.stats dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }
.legend { display: flex; gap: 4px; }
.legend div { flex: 1; text-align: center; font-size: 12px; }
.legend i { display: block; height: 18px; border-radius: 4px; border: 1px solid var(--line); }
.legend span { color: var(--mute); font-variant-numeric: tabular-nums; }
#socPlot { width: 100%; background: var(--bg); border-radius: 6px; }

/* 설명 탭 */
#explain { max-width: 860px; margin: 0 auto; padding: 24px 20px 60px; gap: 18px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.card h2 { font-size: 18px; color: var(--ink); margin: 0 0 4px; }
.card .num { color: var(--accent); font-weight: 700; margin-right: 6px; }
.card p { margin: 8px 0; }
.card svg { width: 100%; height: auto; display: block; margin: 10px 0; }
.card .ann { font-size: 13px; color: var(--mute); border-left: 3px solid var(--accent); padding-left: 10px; }
.card ul { margin: 6px 0; padding-left: 20px; }
.tag { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 99px; margin-right: 4px; }
.tag.ok { background: #d8ecd3; color: #24501b; }
.tag.open { background: #f6dfc9; color: #7a3a10; }
.mini { display: flex; gap: 16px; align-items: flex-start; flex-wrap: wrap; }
.mini table { border-collapse: collapse; font-variant-numeric: tabular-nums; }
.mini td { width: 38px; height: 38px; text-align: center; border: 1px solid var(--line); font-weight: 600; transition: background .2s; }
.mini td.hot { outline: 2px solid var(--accent); outline-offset: -2px; }
.mini .ctrl { display: flex; flex-direction: column; gap: 6px; min-width: 180px; }
.refs { font-size: 13px; }
.refs a { color: var(--accent); }

@media (max-width: 860px) {
  #play { grid-template-columns: 1fr; padding: 12px 16px; }
  .canvas-wrap { max-width: none; }
}