/* Remove default bullets */
.tree ul {
    list-style-type: none;
    padding-inline-start: 10px;
}
/* Style the caret/arrow */
.caret {
    cursor: pointer;
    user-select: none; /* Prevent text selection */
}
/* Create the caret/arrow with a unicode, and style it */
.caret::before {
    content: "\25B6";
    display: inline-block;
    margin-right: 6px;
}
/* Rotate the caret/arrow icon when clicked on (using JavaScript) */
.caret-down::before {
    transform: rotate(90deg);
}
/* Hide the nested list */
.nested {
    display: none;
}
/* Show the nested list when the user clicks on the caret/arrow (with JavaScript) */
.active {
    display: block;
}