body {
      margin: 0;
      font-family: Arial, sans-serif;
      background: #f5f5f5;
      color: #333;
    }

    header {
      background: #111;
      color: #fff;
      padding: 1em;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    nav a {
      color: #fff;
      margin-left: 1em;
      text-decoration: none;
    }

    nav a:hover {
      text-decoration: underline;
    }

    .section {
      padding: 4em 2em;
      background: #fff;
      margin: 1em 0;
    }

    h2 {
      margin-top: 0;
    }

    canvas {
      width: 100%;
      height: 400px;
      background: #000;
      display: block;
      margin-top: 1em;
    }

    footer {
      background: #111;
      color: #fff;
      text-align: center;
      padding: 2em;
    }