ul.tree-view {
    padding: 0px;
    margin: 0px;
}

    ul.tree-view li {
        padding: 0px;
        margin: 0px;
        list-style: none;
        vertical-align: top;
        line-height: 25px;
    }

        ul.tree-view li a {
            text-decoration: none;
        }

ul.top-list > li {
    display: inline-block;
    width: 33%;
    margin-bottom: 5px;
}

    ul.top-list > li > a {
        margin: 0 10px 5px 0;
        display: block;
    }

    ul.top-list > li.parent-node > a {
        border-bottom: 1px solid #ccc;
    }

li.parent-node > ul {
    padding-left: 7px;
}

ul.top-list > li, ul.top-list > li > a {
    color: black;
    font-size: 15px;
}

ul.child-list > li {
    margin-left: 10px;
}

    ul.child-list > li > a {
        color: black;
        font-size: 13px;
        padding: 2px 5px;
    }

        ul.child-list > li > a:hover {
            border-color: #515151;
            color: black;
            background-color: #c3c3c3;
            background-image: -webkit-linear-gradient(top,#e2e2e2 0,#c3c3c3 100%);
            background-image: -moz-linear-gradient(top,#e2e2e2 0,#c3c3c3 100%);
            background-image: -ms-linear-gradient(top,#e2e2e2 0,#c3c3c3 100%);
            background-image: -o-linear-gradient(top,#e2e2e2 0,#c3c3c3 100%);
            background-image: linear-gradient(top,#e2e2e2 0,#c3c3c3 100%);
        }

.top-list {
columns: 3 auto;
}

ul.top-list > li {
width: 100%;
}

li.parent-node {
    padding-bottom: 20px !important;
}