#tree h1 {
  margin: 0;
  padding-bottom: 20px;
  border-bottom: 1px solid #adadae;
  color: #5c5d5e;
  font-size: 1.1em;
}

#tree .tree {
  padding: 20px 0;
}

#tree .tree::after {
  content: '';
  display: block;
  clear: left;
}

#tree .tree div {
  clear: left;
}

#tree input[type="checkbox"] {
  position: absolute;
  left: -9999px;
}

#tree label, #tree a {
  display: block;
  float: left;
  clear: left;
  position: relative;
  margin: 5px 5px 5px 25px;
  padding: 7px;
  border-radius: 2px;
  text-decoration: none;
  cursor: pointer;
  height: 25px;
  line-height: 11px;
  font-size: 1.2rem !important;
  color: #111;
}

#tree label::before, #tree a::before {
  width: 0;
  height: 0;
  border: 0;
  margin: 0;
  transform: none;
  display: block;
  position: absolute;
  top: 0px;
  left: -30px;
  font-family: 'Material Icons';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  display: inline-block;
  line-height: 1;
  text-transform: none;
  letter-spacing: normal;
  word-wrap: normal;
  white-space: nowrap;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'liga';
  color: #575757;
}

#tree label::before {
  content: '\e2c7'; /* closed folder */
}

#tree input:checked + label::before {
  content: '\e2c8'; /* open folder */
}

#tree a::before {
  content: '\e873'; /* file */
}

#tree input:hover + label, #tree a:hover {
  outline: none;
  background-color: rgba(0, 0, 0, 0.05);
}

#tree .sub {
  display: none;
  float: left;
  margin-left: 30px;
}

#tree input:checked ~ .sub {
  display: block;
}