/* ============ ক্যানভাস ও স্টেজ স্টাইল (canvas.css) ============ */
.stage {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: conic-gradient(#0000 25%, rgba(128, 128, 128, .07) 0 50%, #0000 0 75%, rgba(128, 128, 128, .07) 0) 0 0/20px 20px, var(--bg);
}

canvas {
  display: block;
  border-radius: 3px;
  box-shadow: 0 10px 36px rgba(0, 0, 0, .6);
  touch-action: none;
}