:root{
  --bg: #0f172a;
  --panel: #ffffff;
  --panel-2: #f8fafc;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --accent: #6366f1;
  --accent-2: #4f46e5;
  --good: #10b981;
  --warn: #f59e0b;
  --bad: #ef4444;
  --shadow: 0 1px 2px rgba(15,23,42,.04), 0 8px 24px rgba(15,23,42,.06);
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:var(--sans);color:var(--ink);background:#f1f5f9;-webkit-font-smoothing:antialiased}
body{min-height:100vh;display:flex;flex-direction:column}
a{color:var(--accent-2);text-decoration:none}
a:hover{text-decoration:underline}
code{font-family:var(--mono);background:#eef2ff;color:#3730a3;padding:1px 5px;border-radius:4px;font-size:.9em}

.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 24px;background:#fff;border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:10;
}
.brand{display:flex;align-items:center;gap:12px}
.brand h1{margin:0;font-size:18px;letter-spacing:-.01em}
.brand .tag{margin:0;color:var(--muted);font-size:13px}
.topbar nav{display:flex;gap:18px}
.topbar nav a{font-size:14px;color:var(--muted)}
.topbar nav a:hover{color:var(--ink)}

.layout{display:grid;grid-template-columns:360px 1fr;gap:18px;padding:18px;flex:1;min-height:0}
@media (max-width: 980px){.layout{grid-template-columns:1fr}}

.sidebar{display:flex;flex-direction:column;gap:14px;min-height:0;overflow:auto}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
.card h2{margin:0 0 8px;font-size:14px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.hint{margin:0 0 10px;color:var(--muted);font-size:12.5px;line-height:1.45}

textarea{
  width:100%;min-height:140px;resize:vertical;
  font-family:var(--mono);font-size:12.5px;
  padding:10px;border:1px solid var(--line);border-radius:8px;
  background:var(--panel-2);color:var(--ink);outline:none;
}
textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #6366f120}

.row{display:flex;gap:8px;margin-top:10px}
button{font:inherit;cursor:pointer;border-radius:8px;padding:8px 12px;font-size:13px;border:1px solid var(--line);background:#fff}
button.primary{background:var(--accent-2);color:#fff;border-color:var(--accent-2)}
button.primary:hover{background:#4338ca}
button.ghost{background:#fff}
button.ghost:hover{background:var(--panel-2)}
button:disabled{opacity:.5;cursor:not-allowed}

.status{margin:8px 0 0;font-size:12px;color:var(--muted);min-height:1.2em}
.status.ok{color:var(--good)}
.status.warn{color:var(--warn)}
.status.err{color:var(--bad)}

.control{display:flex;flex-direction:column;gap:6px;margin-bottom:10px;font-size:13px}
.control:last-child{margin-bottom:0}
.control > span:first-child{font-weight:500}
.control .sub{color:var(--muted);font-size:11.5px}
.control output{font-variant-numeric:tabular-nums;color:var(--accent-2);font-weight:600}
.control input[type=range]{width:100%}
.control select{padding:7px 8px;border:1px solid var(--line);border-radius:8px;background:#fff;font:inherit;font-size:13px}
.control.checkbox{flex-direction:row;align-items:center;gap:8px}

.seg{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;margin-bottom:10px}
.seg-btn{flex:1;padding:8px;border:0;border-radius:0;background:#fff;font-weight:500}
.seg-btn.active{background:var(--accent);color:#fff}
.seg-btn + .seg-btn{border-left:1px solid var(--line)}

.canvas-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);position:relative;overflow:hidden;
  display:flex;flex-direction:column;min-height:0;
}
.meta{padding:10px 14px;border-bottom:1px solid var(--line);font-size:12.5px;color:var(--muted);display:flex;gap:14px;flex-wrap:wrap}
.meta b{color:var(--ink);font-weight:600}
.chart{flex:1;position:relative;min-height:0}
.chart svg{display:block;width:100%;height:100%}
.legend{padding:8px 14px;border-top:1px solid var(--line);font-size:12px;color:var(--muted);display:flex;gap:14px;flex-wrap:wrap;max-height:96px;overflow:auto}
.legend .swatch{display:inline-flex;align-items:center;gap:6px}
.legend .dot{width:10px;height:10px;border-radius:3px;display:inline-block}

.tooltip{
  position:absolute;pointer-events:none;background:rgba(15,23,42,.96);color:#fff;
  padding:8px 10px;border-radius:6px;font-size:12px;line-height:1.45;max-width:280px;
  box-shadow:0 4px 12px rgba(0,0,0,.25);z-index:20;
}
.tooltip b{color:#fff}
.tooltip .id{font-family:var(--mono);color:#a5b4fc;font-size:11px}
.tooltip .ns{display:inline-block;font-size:10.5px;text-transform:uppercase;letter-spacing:.06em;padding:1px 6px;border-radius:99px;margin-left:6px;color:#0f172a}
.tooltip .ns.bp{background:#a7f3d0}
.tooltip .ns.mf{background:#fbcfe8}
.tooltip .ns.cc{background:#fde68a}

.cell{stroke:#fff;stroke-width:1px;cursor:pointer;transition:opacity .15s}
.cell:hover{opacity:.85}
.cell.parent{fill:none;stroke-width:2px;stroke:#fff}
.label{pointer-events:none;font-family:var(--sans);fill:#0f172a;font-weight:600;text-anchor:middle;dominant-baseline:middle}
.label .pval{font-weight:400;opacity:.75}

.about{padding:24px;max-width:860px;margin:0 auto;color:var(--muted);font-size:14px;line-height:1.6}
.about h2{color:var(--ink)}
.about .muted{font-size:12.5px}