body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    margin: 0;
    padding: 0;
}
header {
    background-color: #333;
    color: #fff;
    padding: 10px 20px;
    text-align: center;
}
footer {
    background-color: #222;
    color: #fff;
    text-align: center;
    padding: 20px 0;
}