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

header {
    background: #222;
    color: white;
    padding: 1em;
    text-align: center;
}

nav a {
    margin: 0 1em;
    color: #ddd;
    text-decoration: none;
}

nav a:hover {
    color: white;
}

main {
    padding: 2em;
}

footer {
    text-align: center;
    padding: 1em;
    background: #eee;
}