Tweak document-outline parent item font size


#1

How do I tweak the font size of parent items in outline view? (Note the contrast between parent and child items on the outline pane.)

This is my present styles.less setting, which seems to have no effect on the parent-items shown above.

@font-size: 1rem;

html,
body,
.tree-view,
.tooltip,
.tab-bar .tab,
.tab-bar .tab.active,
.find-and-replace .find-meta-container,
atom-text-editor[mini],
.btn,
.status-bar,
.overlay .select-list ol.list-group li,
.overlay.select-list ol.list-group li,
.list-tree li.list-nested-item > .list-item {
  font-size: @font-size;
}
.pane-item { font-size: 20px; }