body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 0;
      background-color: #f4f4f4;
      color: #333;
    }

    header {
      background-color: #2c3e50;
      color: white;
      padding: 20px 0;
      text-align: center;
    }

    main {
      max-width: 900px;
      margin: 20px auto;
      padding: 0 20px;
    }

    section {
      background-color: white;
      padding: 20px;
      margin-bottom: 20px;
      border-radius: 8px;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
    }

    h2 {
      color: #2c3e50;
    }

    footer {
      text-align: center;
      padding: 20px;
      background-color: #ecf0f1;
      font-size: 0.9em;
    }