.he-tree .tree-node{
  border: 1px solid #ccc;
  margin-bottom: 5px;
  padding: 5px;
}
.he-tree--hidden{
  display: none;
}
.he-tree--rtl{
  direction: rtl;
}
.he-tree .tree-placeholder{
}
.he-tree .tree-placeholder-node{
  background: #ddf2f9;
  border: 1px dashed #00d9ff;
  height: 20px;
}
.he-tree .dragging .tree-node-back:hover{
  background-color: inherit;
}