body {
      background-color: #000;
      margin: 0;
      padding: 0;
      font-family: sans-serif;
      color: white;
      text-align: center;
    }

    canvas {
      display: block;
      margin: 40px auto;
      border: 1px solid #444;
    }

    h1 {
      margin-top: 30px;
      font-size: 1.5em;