body {
    font-family: sans-serif;
    margin: 2rem;
    background-color: #f4f4f4;
    color: #222;
}

header {
    background-color: #007acc;
    color: white;
    padding: 1rem;
    border-radius: 5px;
}

nav a {
    color: white;
    margin-right: 1rem;
    text-decoration: none;
}

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

main {
    background: white;
    padding: 1rem;
    margin-top: 1rem;
    border-radius: 4px;
}