.br-stage { margin: 14px 0; border: 1px solid var(--line); border-radius: 12px; padding: 10px; text-align: center;
  background: repeating-conic-gradient(#e9edf2 0% 25%, #fff 0% 50%) 50% / 20px 20px; }
.br-stage canvas { max-width: 100%; height: auto; cursor: crosshair; display: inline-block; }
.br-colorrow { display: flex; align-items: center; gap: 8px; min-height: 40px; }
.br-swatch { width: 32px; height: 32px; border-radius: 8px; border: 1px solid var(--line); display: inline-block; }