body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background: #f4f4f4;
    color: #333;
}
h1 {
    text-align: center;
}
ul {
    list-style: none;
    padding: 0;
}
li {
    margin: 10px 0;
}
a {
    text-decoration: none;
    color: #0066cc;
    font-weight: bold;
}