body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

header {
    background-color: #333;
    color: #fff;
    padding: 1rem;
    text-align: center;
}

header nav a {
    color: #fff;
    margin: 0 1rem;
    text-decoration: none;
}

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

main {
    padding: 2rem;
    text-align: center;
}

footer {
    background-color: #f4f4f4;
    padding: 1rem;
    text-align: center;
    margin-top: 2rem;
}