body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

header {
    background: #333;
    color: #fff;
    padding: 1rem;
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0;
}

    nav ul li {
        display: inline;
        margin-right: 1rem;
    }

        nav ul li a {
            color: #333;
            text-decoration: none;
        }

main {
    padding: 1rem;
}

footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 1rem;
    position: fixed;
    width: 100%;
    bottom: 0;
}