body {
    font-family: Arial, sans-serif;
}

.click-area {
    cursor: pointer;
    padding: 10px;
    background-color: #007BFF;
    color: white;
    text-align: center;
    width: 200px;
    margin: 20px auto;
}

.hidden-list {
    display: none;
    list-style-type: none;
    padding: 0;
    margin: 0;
    width: 200px;
    margin: 0 auto;
}

.hidden-list li {
    border-bottom: 1px solid #ddd;
    padding: 10px;
    text-align: center;
}

.hidden-list li:hover {
    background-color: #f1f1f1;
}