body {
            font-family: Arial, sans-serif;
            margin: 20px;
            padding: 20px;
            background-color: #f4f4f4;
        }

        header, footer {
            background-color: #333;
            color: white;
            padding: 10px 0;
            text-align: center;
        }

        main {
            background-color: white;
            padding: 20px;
            border-radius: 5px;
        }

        a {
            margin: 0 10px;
            text-decoration: none;
            color: #333;
        }

        a:hover {
            text-decoration: underline;
        }