body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
}
header, footer {
    background: #333;
    color: #fff;
    padding: 1rem;
    text-align: center;
}
main {
    padding: 2rem;
}
h1, h2 {
    color: #444;
}
ul {
    list-style: disc;
    margin-left: 2rem;
}