RESTORE_FE/css/tree.css

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

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

#tree li {
  line-height: 1.2;
  position: relative;
  padding: 0 0 1em 1em;
  }

#tree ul li { padding: 1em 0 0 1em; }

#tree > li:last-child { padding-bottom: 0; }

/* ————————————————————–
  Tree labels
*/
#tree_label {
  position: relative;
  display: inline-block;
  background: #fff;
  }

label#tree_label { cursor: pointer; }

label#tree_label:hover { color: #666; }

/* ————————————————————–
  Tree expanded icon
*/
label#tree_label:before {
  background: #000;
  color: #fff;
  position: relative;
  z-index: 1;
  float: left;
  margin: 0 1em 0 -2em;
  width: 1em;
  height: 1em;
  border-radius: 1em;
  content: '+';
  text-align: center;
  line-height: .9em;
  }

:checked ~ label#tree_label:before { content: '–'; }

/* ————————————————————–
  Tree branches
*/

.fa {
  margin-right: 5px;
}

span.tree_label:after {
  position: absolute;
  top: 0;
  left: -2em;
  display: block;
  height: 1.8em;
  width: 2.5em;
  border-bottom: 1px solid #777;
  border-left: 1px solid #777;
  border-radius: 0 0 0 0.3em;
  content: '';
    }

#tree li:last-child:before {
  height: 1em;
  bottom: auto;
  border:0px;
  }

#tree > li:last-child:before { display: none; }

#tree_custom {
  display: block;
  background: #eee;
  padding: 1em;
  border-radius: 0.3em;
}