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

header, nav, main, footer {
    margin: 20px;
    padding: 20px;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
}

header h1 {
    margin: 0;
    color: #333;
}

nav {
    margin-top: 10px;
}

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

main h2 {
    color: #333;
}

footer {
    margin-top: 20px;
    text-align: center;
    color: #777;
}