:root {
  color-scheme: dark;
  --bg: #12161c;
  --panel: #1b222b;
  --line: #2e3a47;
  --text: #e8e4d8;
  --muted: #9aa5b1;
  --accent: #f2c14e;
  --bad: #ff7a6b;
  --good: #7ddc9a;
  font: 14px/1.5 ui-monospace, "SF Mono", Menlo, monospace;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
main { display: flex; flex-wrap: wrap; gap: 20px; padding: 20px; align-items: flex-start; }
.board { flex: 0 1 768px; }
canvas { width: 100%; max-width: 768px; image-rendering: pixelated; border: 1px solid var(--line); cursor: crosshair; display: block; }
.hover { min-height: 1.5em; color: var(--muted); margin: 8px 0 0; }
.panel { flex: 1 1 300px; max-width: 380px; background: var(--panel); border: 1px solid var(--line); padding: 16px 20px; }
h1 { font-size: 20px; margin: 0 0 12px; }
h1 small { color: var(--muted); font-size: 12px; font-weight: normal; }
h2 { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 16px 0 8px; }
.stats { display: grid; grid-template-columns: auto 1fr; gap: 2px 12px; margin: 0; }
.stats dt { color: var(--muted); }
.stats dd { margin: 0; font-variant-numeric: tabular-nums; }
.warn { color: var(--bad); }
.ok { color: var(--good); }
.tools { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
button {
  font: inherit; color: var(--text); background: #26303b; border: 1px solid var(--line);
  padding: 8px 10px; cursor: pointer; text-align: left;
}
button:hover:not(:disabled) { border-color: var(--muted); }
button:focus-visible, a:focus-visible, canvas:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button[aria-checked="true"] { border-color: var(--accent); background: #3a3420; }
button:disabled { opacity: .5; cursor: not-allowed; }
button.primary { background: #2f4a63; }
kbd { font: inherit; font-size: 11px; color: var(--muted); }
.actions { display: flex; gap: 8px; margin-top: 12px; }
.actions button { flex: 1; text-align: center; }
.help { color: var(--muted); font-size: 12px; margin: 8px 0 0; min-height: 1.5em; }
.message { min-height: 1.5em; color: var(--accent); margin: 10px 0 0; }
.message.end-won { color: var(--good); font-weight: bold; }
.message.end-lost { color: var(--bad); font-weight: bold; }
.log { margin: 0; padding-left: 0; list-style: none; max-height: 220px; overflow: auto; font-size: 12px; }
.log li { padding: 3px 0; border-bottom: 1px solid var(--line); }
.log li:first-child { color: var(--text); }
.log li:not(:first-child) { color: var(--muted); }
a { color: var(--accent); }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }