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

header {
    background: #222;
    color: #fff;
    padding: 15px;
}

header a {
    color: #fff;
    text-decoration: none;
    margin: 0 5px;
}

main {
    padding: 15px;
}

footer {
    text-align: center;
    padding: 10px;
    background: #f2f2f2;
}