body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    text-align: center;
    margin: 0;
    padding: 20px;
  }
  
  h1 {
    color: #333;
  }
  
  canvas {
    border: 2px solid #333;
    background-color: #fff;
  }