div.one-root-category {
    border-bottom: 1px solid #ddd;
    display: inline-block;
}

    div.one-root-category:before {
        content: "|";
    }

    div.one-root-category:first-child:before {
        content: "";
    }

    div.one-root-category select {
        width: 20em;
        margin: 0 5px;
    }

    div.one-root-category:nth-last-child(3) {
        display: inline-block;
    }


div.cat {
    font-size: 1.5em;
}

    div.cat.level1 {
        font-size: 1.5em;
        padding-left: 0;
        margin-top: 1em;
    }

    div.cat.level2 {
        font-size: 1.4em;
        padding-left: 1em;
        margin-top: .5em;
    }

    div.cat.level3 {
        font-size: 1em;
        padding-left: 1.3em;
        margin-top: .2em;
    }

    div.cat.level4 {
        font-size: 1em;
        padding-left: 1.2em;
        margin-top: 0.1em;
    }