/* the tree node's style */
.tree-view {
  overflow-y: hidden;
}

.tree-view_item {
  cursor: pointer;
  padding: 7px 5px 7px 15px;
}

.tree-view_item:hover {
  background-color: rgba(255, 255, 255, 0.15)
}

/* style for the children nodes container */
.tree-view_children {
  
}

.tree-view_children-collapsed {
  height: 0px;
}

.tree-view_arrow {
  float: right;
  cursor: pointer;
  margin-right: 6px;
  display: inline-block;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
/* rotate the triangle to close it */
.tree-view_arrow-collapsed {
  -webkit-transform: rotate(-90deg);
  -moz-transform: rotate(-90deg);
  -ms-transform: rotate(-90deg);
  transform: rotate(-90deg);
}