* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    padding: 20px;
}

h1 {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 20px;
}

h2 {
    text-align: center;
    font-size: 2em;
    margin-bottom: 30px;
}

.folder {
    display: flex;
    align-items: center;
    background-color: #fff;
    padding: 10px;
    margin: 5px 0;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.folder:hover {
    background-color: #e2e2e2;
}

.folder-icon {
    width: 20px;
    height: 20px;
    margin-right: 10px;
}

.folder-items {
    display: none;
    padding-left: 20px;
}

.folder-items a {
    text-decoration: none;
    color: #333;
    margin-bottom: 5px;
    display: block;
}

.folder-items a:hover {
    text-decoration: underline;
}