.wtree li {
  list-style-type: none;
  margin: 10px 0 10px 10px;
  position: relative;
}
.wtree li:before {
  content: "";
  position: absolute;
  top: -10px;
  left: -20px;
  border-left: 2px solid #ddd;
  border-bottom: 2px solid #ddd;
  width: 20px;
  height: 15px;
  border-color: black;
}
.wtree li:after {
  position: absolute;
  content: "";
  top: 5px;
  left: -20px;
  border-left: 2px solid #ddd;
  border-top: 2px solid #ddd;
  width: 20px;
  height: 100%;
  border-color: black;
}
.wtree li:last-child:after {
  display: none;
}
.wtree li span {
  display: block;
  border: 2px solid #ddd;
  padding: 10px;
  color: #888;
  text-decoration: none;
  border-color: black;
}

.wtree li span:hover, .wtree li span:focus {
  background-image: url("{% static 'assets/images/arrow.png' %}");
  border: 3px solid blue;
  transform: scale(1.02)

}
.wtree li span:hover + ul li span, .wtree li span:focus + ul li span {
  background: #eee;
  color: #000;
  border: 1px solid #aaa;
  border-color: red;
}
.wtree li span:hover + ul li:after, .wtree li span:hover + ul li:before, .wtree li span:focus + ul li:after, .wtree li span:focus + ul li:before {
  border-color: #aaa;

}