body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f3f3f3;
}

header {
    background: #222;
    color: #fff;
    padding: 10px 20px;
}

nav a {
    color: #ffd200;
    text-decoration: none;
    margin-right: 15px;
}

nav a:hover {
    text-decoration: underline;
}

main {
    padding: 20px;
    background: #fff;
}

footer {
    background: #eee;
    text-align: center;
    padding: 10px;
    font-size: 0.9em;
}