.tree,
.tree ul {
    list-style-type: none;  /* removes bullets */
    padding-left: 10px;
    margin: 0;
}

.tree li > ul {
    list-style-type: none;
    margin-left: 20px;
}

.tree li {
    list-style-type: none;
    margin: 5px 0;
    color: rgb(255, 255, 255);
}

.tree .toggle {
    font-family: Georgia, 'Times New Roman', Times, serif;
    font-weight: bold;
    font-size: 24px;
    color: rgb(255, 255, 255);
    margin-right: 5px;
    cursor: pointer;
    user-select: none;
    
}

.tree .toggle:hover {
    color: #555;
}