/*
 * The side activity bar is shipped horizontally (activityBarPosition: "top",
 * see jupyter-config/labconfig). In that mode the TabBar content node spans
 * the full width (@jupyterlab/application/style/sidepanel.css) with no
 * justify-content, so the icons sit at the leading edge. Center them under
 * the menu bar instead.
 *
 * `safe center` keeps the row start-aligned should the icons ever exceed the
 * bar width, so none are pushed past the leading edge out of reach of the
 * content node's horizontal overflow scroll.
 */
.jp-SideBar[data-orientation='horizontal'] .lm-TabBar-content {
  justify-content: safe center;
}