body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
header {
    background: #333;
    color: white;
    padding: 1em;
    text-align: center;
}
nav a {
    margin: 0 1em;
    color: #ccc;
    text-decoration: none;
}
nav a:hover {
    text-decoration: underline;
}
main {
    padding: 1em;
}
footer {
    background: #eee;
    text-align: center;
    padding: 1em;
    position: fixed;
    bottom: 0;
    width: 100%;
}