/* Remove default bullets */
ul, .treeview {
  list-style-type: none;
}

/* Remove margins and padding from the parent ul */
.treeview {
  margin: 0;
  padding: 0;
}

/* Hide the nested list */
.nested {
  display: none;
}

/* Show the nested list when the user clicks on the caret/arrow (with JavaScript) */
.active {
  display: block;
}