body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 0;
      background-color: #f7f7f7;
      color: #222;
    }
    .callout {
      background-color: #202020;
      color: #fff;
      padding: 20px;
      text-align: center;
    }
    
    .container {
      max-width: 900px;
      margin: 40px auto;
      background-color: #fff;
      padding: 20px;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
    }
    h1, h2 {
      color: #202020;
    }
    footer {
      background-color: #202020;
      color: #fff;
      text-align: center;
      padding: 20px;
      margin-top: 40px;
    }
    ul {
      padding-left: 20px;
    }