body {
    font-family: Arial, sans-serif;
    margin: 20px;
    line-height: 1.6;
}
header {
    text-align: center;
    border-bottom: 2px solid #ccc;
    padding-bottom: 10px;
}
main section {
    margin-bottom: 20px;
}
footer {
    text-align: center;
    margin-top: 20px;
    font-size: 0.8em;
}
a {
    color: #007bff;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
ul {
    list-style-type: disc;
    padding-left: 20px;
}