#hiroshi-tetris-area {
  background: #111;
  width: 100%;
  line-height: 0;
  touch-action: none;
}
#hiroshi-tetris-wrapper {
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  touch-action: none;
}
#hiroshi-tetris-wrapper canvas {
  display: block;
  width: 100%;
  aspect-ratio: 50 / 71;
  touch-action: none;
}