.mutation {
    background-color: beige !important;
    left: 2px;
    margin: 0px 2px;
    position: relative;
}
.highlight {
    background-color: #fc8593 !important;
    transition: background-color 0.2s ease-in-out;
}
ul {
 transition: max-height 0.5s;
 max-height: 9999px;
}
.folded {
  max-height: 0px;
    /*display: none*/
}
.tree {
    min-height: 20px;
    padding-left: 20px;
    margin-bottom: 20px;
}
.tree li {
    list-style-type:none;
    margin:0;
    padding:10px 5px 0 5px;
    position:relative
}
.tree li::before, .tree li::after {
    content:'';
    left:-20px;
    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:30px;
    width:25px
}
.tree li span {
    -webkit-border-radius:5px;
    border:1px solid #999;
    border-radius:5px;
    display:inline-block;
    padding:3px 8px;
    text-decoration:none
}
.tree li.parent_li>span {
    cursor:pointer
}
.tree 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
}