:root {
  --bg: #0b1220;
  --panel: #121a2a;
  --ink: #e8eefc;
  --muted: #9fb0d3;
  --accent: #6aa6ff;
  --accent2: #ff7aa2;
  --grid: rgba(255,255,255,0.06);
  --good: #64d2a6;
  --warn: #ffd166;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial;
  background: radial-gradient(1200px 800px at 70% 20%, #0f1a31 0%, var(--bg) 60%);
  color: var(--ink);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 10px;
}
header { padding: 10px 16px; }
header h1 { font-size: 18px; margin: 0 0 4px; font-weight: 700; }
header p { margin: 0; color: var(--muted); font-size: 13px; }

.wrap {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 12px;
  padding: 0 12px 12px;
  min-height: 0;
}

.panel {
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

#canvas {
  width: 100%;
  height: 100%;
  background: conic-gradient(from 180deg at 50% 50%, #0b1426, #0b1426);
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.08);
}

.controls { display: grid; gap: 10px; }
.group { border-top: 1px dashed rgba(255,255,255,0.12); padding-top: 10px; margin-top: 10px; }
.row { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 8px; }
label { font-size: 13px; color: var(--muted); }
input[type="range"] { width: 100%; }
input[type="number"] { width: 100px; background: var(--panel); color: var(--ink); border: 1px solid rgba(255,255,255,0.12); border-radius: 8px; padding: 6px 8px; }
.pill { display: inline-flex; gap: 8px; }
button {
  background: var(--panel);
  color: var(--ink);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
}
button:hover { border-color: rgba(255,255,255,0.3); }
.hint { font-size: 12px; color: var(--muted); }
footer { padding: 10px 16px; color: var(--muted); font-size: 12px; }
code { color: var(--warn); }