* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  display: flex; background: #05070d; color: #cfe0ff; overflow: hidden;
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

#stage { position: relative; flex: 1 1 auto; min-width: 0; background: #000; }
#stage canvas.layer { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }

#panel {
  width: 340px; flex: 0 0 340px; height: 100%;
  background: #0b1020; border-left: 1px solid #1b2440;
  overflow-y: auto; padding: 14px;
}
h1 { font-size: 18px; }
.hint { font-size: 11px; color: #6c7aa5; margin: 4px 0 12px; }
.card { background: #0f1528; border: 1px solid #1b2440; border-radius: 8px; padding: 10px; margin-bottom: 10px; }
.row { display: flex; align-items: center; gap: 6px; margin-bottom: 8px; flex-wrap: wrap; font-size: 12px; }
.row label { color: #9fb0d8; display: flex; align-items: center; gap: 4px; }
.spacer { margin-left: auto; }
button {
  background: #1b2a4d; color: #dbe6ff; border: 1px solid #2c3f6e;
  border-radius: 6px; padding: 6px 10px; font-size: 12px; cursor: pointer;
}
button:hover { background: #243659; }
button.primary { background: #24489c; border-color: #3a63c9; }
button.active { background: #7a3232; border-color: #c94f4f; }
select, input[type=number] {
  background: #0c1122; color: #dbe6ff; border: 1px solid #2c3f6e;
  border-radius: 6px; padding: 4px 6px; font-size: 12px;
}
select { min-width: 110px; }
input[type=range] { flex: 1; }
input[type=checkbox] { accent-color: #3a63c9; }

#readout { display: flex; gap: 12px; flex-wrap: wrap; font-size: 12px; color: #8fa0c8; padding: 4px 2px; }
#readout b { color: #eaf1ff; }

.body { border: 1px solid #1b2440; border-radius: 6px; padding: 8px; margin-bottom: 8px; }
.body h3 { font-size: 13px; margin-bottom: 6px; display: flex; align-items: center; gap: 6px; }
.swatch { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 8px; }
.cell { display: flex; align-items: center; gap: 4px; }
.cell label { font-size: 11px; width: 32px; color: #7d8db3; }
.cell input { width: 100%; min-width: 0; }