body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 0;
      background-color: #f4f4f4;
    }
    header, footer {
      background-color: #333;
      color: white;
      text-align: center;
      padding: 1em;
    }
    main {
      padding: 2em;
    }
    nav ul {
      list-style-type: none;
      padding: 0;
      display: flex;
      gap: 1em;
      justify-content: center;
      background-color: #444;
    }
    nav ul li a {
      color: white;
      text-decoration: none;
      padding: 0.5em;
      display: block;
    }
    nav ul li a:hover {
      background-color: #666;
    }
    section {
      margin-top: 2em;
    }
    img {
      width: 50px;
      margin-right: 10px;
    }