Custom.css

.panel{
  background: url('http://www.kinemacitrus.co.jp/xml_img/backimage/img/ys08/ys08-1.jpg') no-repeat;
}
.split-view.split-view-vertical{
  background-color: rgba(255,255,255,0.2);
}
/*ol#elements-tree-outline*/ li.hovered{
  background-color: rgba(255,255,255,0.7);
  font-weight: bold;
}
/*ol#elements-tree-outline*/ li.selected{
  background-color: #000080;
  font-weight: bold;
}
li.selected.parent{
    -webkit-mask-position: -4px -96px;
}
li.selected.parent.expanded{
  -webkit-mask-position: -20px -96px !important;
}
div.split-view-contents-second{
  background-color: rgba(255,255,255,0.8);
}