No CSS hook exists for distinguishing between content/history/etc actions for a
given page title. This obviously prevents CSS from changing the appearance based
on the action being performed.
This limitation appears to be inherent to all SkinTemplate.php derived skins, as
I can see nothing in that code that references the action.
I was implementing a link highlighting suggestion made by Timwi in this WikiEN-l
With the <body class="ns-0">, I was able to restrict the behavior to only the
article namespace. However, I found no way to prevent the behavior from
appearing on edit, history, protection, deletion, move, and watch/unwatch pages
for a given title.