.tree {
    min-height:20px;
    padding:2px;
    margin-bottom:20px;
    background-color:#fbfbfb;
    border:1px solid #999;
    -webkit-border-radius:4px;
    -moz-border-radius:4px;
    border-radius:4px;
    -webkit-box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.05);
    -moz-box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.05);
    box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.05);
    width: 100%;
    height: 60vh;
    overflow: scroll;
}

.tree ul {
    padding-left: 10px;
}
.tree li {
    list-style-type:none;
    margin:0;
    padding:5px 5px 0 5px;
    position:relative
}
.tree li::before, .tree li::after {
    content:'';
    left:-10px;
    position:absolute;
    right:auto
}
.tree li::before {
    border-left:1px solid #999;
    bottom:50px;
    height:100%;
    top:0;
    width:1px
}
.tree li::after {
    border-top:1px solid #999;
    height:20px;
    top:25px;
    width:15px
}
.tree li span {
    -moz-border-radius:2px;
    -webkit-border-radius:2px;
    border:1px solid #999;
    border-radius:2px;
    padding-left:2px;
    padding-right:2px;
    display:inline-block;
    text-decoration:none
}
.tree li, .tree li a {
    white-space: nowrap;
}
.tree li.parent_li>span {
    cursor:pointer
}
.tree>ul>li::before, .tree>ul>li::after {
    border:0
}
.tree li:last-child::before {
    height:30px
}
.tree li.parent_li>span:hover, .tree li.parent_li>span:hover+ul li span {
    background:#eee;
    border:1px solid #94a0b4;
    color:#000
}

.tree .active > a {
    background:#eee;
}

.properties {
    height: 30vh;
}