body {
        font-family: Arial, sans-serif;
        margin: 0;
        padding: 0;
        background-color: #f4f4f4;
    }
    header {
        background-color: #333;
        color: #fff;
        padding: 1rem 0;
        text-align: center;
    }
    nav ul {
        list-style: none;
        padding: 0;
    }
    nav ul li {
        display: inline;
        margin: 0 1rem;
    }
    nav ul li a {
        color: #fff;
        text-decoration: none;
    }
    main {
        padding: 2rem;
    }
    footer {
        background-color: #333;
        color: #fff;
        text-align: center;
        padding: 1rem 0;
        position: fixed;
        width: 100%;
        bottom: 0;
    }