.tree,
    .tree ul {
        margin: 0;
        padding: 0;
        list-style: none
    }

    .tree ul {
        margin-left: 1em;
        position: relative
    }

    .tree ul ul {
        margin-left: .5em
    }

    .tree ul:before {
        content: "";
        display: block;
        width: 0;
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        border-left: 1px solid
    }

    .tree li {
        margin: 0;
        padding: 0 1em;
        line-height: 2em;
        color: #000;
        font-weight: 700;
        position: relative
    }

    .tree ul li:before {
        content: "";
        display: block;
        width: 10px;
        height: 0;
        border-top: 1px solid;
        margin-top: -1px;
        position: absolute;
        top: 1em;
        left: 0
    }

    .tree ul li:last-child:before {
        background: #fff;
        height: auto;
        top: 1em;
        bottom: 0
    }

    .indicator {
        margin-right: 5px;
    }

    .tree li a {
        text-decoration: none;
        color: #000;
    }

    .tree li a:hover {
        text-decoration: none;
        color: #f76d37;
    }

    .tree li button,
    .tree li button:active,
    .tree li button:focus {
        text-decoration: none;
        color: #f76d37;
        border: none;
        background: transparent;
        margin: 0px 0px 0px 0px;
        padding: 0px 0px 0px 0px;
        outline: 0;
    }