body {
    font-family: Arial, sans-serif;
    margin: 0;
}

header {
    background: #222;
    color: white;
    padding: 1rem;
}

nav a {
    color: white;
    margin-right: 15px;
    text-decoration: none;
}

section {
    padding: 2rem;
}

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