:root {
  --bg: #F9F7F7;
  --panel: #DBE2EF;
  --muted: #112D4E;
  --accent: #3F72AF;
  --ring: rgba(34, 211, 238, 0.25);
  --radius: 16px;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 16px/1.4 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color: white;
  background: radial-gradient(1200px 800px at 20% -10%, #172554 0%, transparent 60%),
              radial-gradient(1000px 700px at 120% 10%, #0b3b46 0%, transparent 50%),
              var(--bg);
}
.container { max-width: 1200px; margin: 0 auto; padding: 24px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.title { display: flex; align-items: center; gap: 10px; }
.title h1 { margin: 0; font-size: 20px; }
.pill { border: 1px solid var(--ring); color: var(--accent); padding: 6px 10px; border-radius: 999px; font-size: 12px; background: #DBE2EF; }
.hint { opacity: 0.9; font-size: 12px; color: var(--muted); }
.legend { margin-top: 12px; color: var(--muted); font-size: 13px; }

.toolbar { display: flex; gap: 10px; margin: 10px 0 18px; }
.toolbar button {
  background: var(--accent); color: #112D4E; border: 0; padding: 8px 12px; border-radius: 10px; cursor: pointer; font-weight: 600;
  box-shadow: 0 8px 20px rgba(34,211,238,0.2);
}
.toolbar button:hover { filter: brightness(1.05); }


.toolbar select {
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid #ccc;
  background: #f8fafc;
  font-size: 0.9rem;
  margin-right: 10px;
}
.toolbar label {
  margin-right: 4px;
  font-weight: 500;
}


.canvas-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 900px) { .canvas-grid { grid-template-columns: repeat(2, 1fr); } }

.panel {
  background: radial-gradient(600px 400px at 10% 0%, rgba(34, 211, 238, 0.06), transparent 55%),
              radial-gradient(700px 500px at 90% 100%, rgba(124, 58, 237, 0.06), transparent 55%),
              var(--panel);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
}
.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; border-bottom: 1px solid rgba(148, 163, 184, 0.18);
  color: var(--muted); font-size: 14px;
  background: linear-gradient(180deg, rgba(2,6,23,0.4), rgba(2,6,23,0.2));
}
.panel-body { position: relative; width: 100%; height: 50vh; min-height: 260px; }
@media (max-width: 480px) { .panel-body { height: 42vh; } }

canvas {
  width: 100%; height: 100%; display: block;
  background: radial-gradient(600px 400px at 10% 0%, rgba(34, 211, 238, 0.06), transparent 55%),
              radial-gradient(700px 500px at 90% 100%, rgba(124, 58, 237, 0.06), transparent 55%),
              var(--panel);
}