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

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

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

main {
    padding: 2rem;
}

article {
    border-bottom: 1px solid #ccc;
    padding: 1rem 0;
}