body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
}
h3 {
    color: #333;
    border-bottom: 2px solid #333;
    padding-bottom: 5px;
    margin-bottom: 10px;
}
ul {
    list-style-type: none;
    padding: 0;
}
li {
    background-color: #fff;
    margin: 5px 0;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    transition: background-color 0.3s;
    cursor: pointer;
}
li:hover {
    background-color: #f0f0f0;
}
a {
    text-decoration: none;
    color: #007BFF;
}
a:hover {
    text-decoration: underline;
}