canvas {
    border: 1px solid darkgrey;
    background-color: #f0f0f0;
  }

.touch-controls {
    z-index: 999;
}

.ab-controls {
    z-index: 999;
}
  
.touch-controls button,
.ab-controls button {
  width: 90px;
  height: 90px;
  font-size: 12px;
  border-radius: 50%;
  text-align: center;
  line-height: 1.2;
}

.ab-controls button small {
  display: block;
  font-size: 10px;
}