body {
    font-family: sans-serif;
    background-color: #f5f5f5;
    color: #333;
    margin: 0;
    padding: 0;
}

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

nav a {
    color: #00ccff;
    text-decoration: none;
    margin: 0 10px;
}