body {
    text-align: center;
    font-family: Arial;
    background-color: white;
  }
  
  h1 {
    color:black;
  }
  
  .controls {
    margin-bottom: 10px;
  }
  
  canvas {
    border: 2px solid #000;
    background-color: #fff;
    cursor: crosshair;
  }