body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f5f5f5;
}

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

main {
    background-color: white;
    padding: 2rem;
    margin-top: 1rem;
    border-radius: 8px;
}