:root {
  --bg: #fafaf9;
  --panel: #ffffff;
  --text: #1c1917;
  --muted: #78716c;
  --border: #e7e5e4;
  --grid: #f0eeec;
  --grid-strong: #c8c3be;
  --axis: #a8a29e;
  --series: #2563eb;
  --series2: #d97706;
  --accent: #16a34a;
  --hit: #dc2626;
  --warn-bg: #fef3c7;
  --warn-text: #78350f;
  --err-bg: #fee2e2;
  --err-text: #7f1d1d;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #171615;
    --panel: #1f1e1c;
    --text: #e7e5e4;
    --muted: #a8a29e;
    --border: #353230;
    --grid: #2a2826;
    --grid-strong: #57534e;
    --axis: #6b6560;
    --series: #60a5fa;
    --series2: #fbbf24;
    --accent: #4ade80;
    --hit: #f87171;
    --warn-bg: #3b2f12;
    --warn-text: #fcd34d;
    --err-bg: #3f1717;
    --err-text: #fca5a5;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
}
header { padding: 10px 16px; border-bottom: 1px solid var(--border); display: flex; gap: 12px; align-items: baseline; flex-wrap: wrap; }
h1 { font-size: 17px; margin: 0; }
.sub { color: var(--muted); }
h3 { font-size: 13px; font-weight: 600; margin: 18px 0 6px; color: var(--muted); }
h4 { margin: 10px 0 4px; font-size: 13px; }
.columns { display: grid; grid-template-columns: minmax(360px, 5fr) 7fr; gap: 16px; padding: 12px 16px 40px; }
@media (max-width: 900px) { .columns { grid-template-columns: 1fr; } }
.left, .right { min-width: 0; }
.controls { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
.grow { flex: 1; }
button, select {
  font: inherit; color: var(--text); background: var(--panel);
  border: 1px solid var(--border); border-radius: 6px; padding: 4px 10px; cursor: pointer;
}
button:hover:not(:disabled) { border-color: var(--axis); }
button:disabled { opacity: 0.5; cursor: default; }
button.primary { background: var(--series); color: white; border-color: var(--series); }
.editor { border: 1px solid var(--border); border-radius: 6px; overflow: hidden; background: var(--panel); }
.editor .cm-editor { height: 520px; font-size: 13px; }
.editor .cm-editor.cm-focused { outline: none; }
.editor .cm-gutters { background: var(--panel); color: var(--muted); border-right: 1px solid var(--border); }
.editor .cm-content { caret-color: var(--text); }
.editor .cm-activeLine, .editor .cm-activeLineGutter { background: transparent; }
pre { white-space: pre-wrap; word-break: break-word; font: 12px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; margin: 8px 0; }
.log { background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 8px; max-height: 160px; overflow: auto; }
.error { background: var(--err-bg); color: var(--err-text); border-radius: 6px; padding: 8px; margin: 8px 0; }
.warn { background: var(--warn-bg); color: var(--warn-text); border-radius: 6px; padding: 6px 8px; margin: 6px 0; font-size: 13px; }
.status { margin: 8px 0; color: var(--muted); }
.bar { height: 4px; background: var(--grid); border-radius: 2px; margin-top: 4px; overflow: hidden; }
.bar > div { height: 100%; background: var(--series); }
.report { margin-top: 10px; }
.report table { border-collapse: collapse; width: 100%; font-size: 13px; }
.report td { padding: 3px 6px; border-bottom: 1px solid var(--border); vertical-align: top; }
.report td:first-child { color: var(--muted); white-space: nowrap; width: 1%; }
.caption { margin: 10px 0 4px; font-size: 13px; color: var(--muted); }
.helpers { margin-top: 10px; }
.helpers summary { cursor: pointer; color: var(--muted); }
.plot { width: 100%; height: 220px; display: block; background: var(--panel); border: 1px solid var(--border); border-radius: 6px; }
.plot.short { height: 150px; }
.plot.tall { height: 380px; }
.grab { cursor: grab; touch-action: none; }
.legend { font-size: 12px; color: var(--muted); margin: 4px 0; display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.legend input[type="range"] { width: 120px; }
.swatch { display: inline-block; width: 14px; height: 3px; border-radius: 2px; }
.swatch.s1 { background: var(--series); }
.swatch.s2 { background: var(--series2); }
.ring { display: inline-block; width: 10px; height: 10px; border-radius: 50%; border: 2px solid; }
.ring.hit { border-color: var(--hit); }
.ring.listen { border-color: var(--accent); }
.mono { font-family: ui-monospace, monospace; font-size: 12px; min-width: 64px; }
.note, .empty { color: var(--muted); padding: 12px; border: 1px dashed var(--border); border-radius: 6px; }
.empty { padding: 40px; text-align: center; }
.options { font-size: 13px; color: var(--muted); gap: 14px; }
.options label { display: flex; gap: 4px; align-items: center; cursor: pointer; }