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

/* Indent each tree level. */
li.tree-line {
    position: relative;
    padding-left: 2.0em;
}

li.tree-line:last-child {
    padding-left: 2.1em; /* for the 0.1em border-left in the last child */
}

/* Draw vertical tree lines next to all children except the last. */
li.tree-line {
    border-left: 0.1em solid #6185a0;
}

li.tree-line:last-child {
    border-left: 0;
}

/* Draw horizontal tree lines to all children. */
span.tree-conn {
    position: absolute;
    height: 0.65em;
    left: 0em;
    width: 1.5em;
    border-bottom: 0.1em solid #6185a0;
}

/* Draw the vertical tree line to the last child. */
li.tree-line:last-child > span.tree-conn {
    border-left: 0.1em solid #6185a0;
}

.tree-toggle {
    text-decoration: none;
    font-family: monospace;
    font-size: larger;
}