User blog comment:Rupert Giles/Global Navigation Update/@comment-24416108-20141203162959/@comment-1038387-20141203164304

If you do that, you hide the top bar. Which means you also lose the search box.

If I understand correctly (but don't pin me down on this), this code is permissable on 'personal css (as Gloweye says, add it there). It may not be used on Wikia.css.