body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

header, footer {
    background: #333;
    color: #fff;
    padding: 10px 20px;
    text-align: center;
}

main {
    padding: 20px;
}

a {
    color: #007bff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}