react-web-tutorial/css/admin.css

.tree-node {
  position: relative;
  padding: 2px;
}
.tree-node h5 {
  margin: 0;
  border: 1px solid #eee;
}
.tree-node h5 i {
  padding: 5px 0 0 6px;
  color: #777;
  position: absolute;
}
.tree-node h5 span {
  display: inline-block;
  padding: 3px 10px;
  border-left: 1px solid #eee;
  margin-left: 35px;
}
.drag-handle {
  /*top: 6px;*/
}
.tree-node.drag-over > h5 {
  border: 1px solid red;
}