Thats not in css i don't believe. That information is pulled from the database before the article info, so you have to go into the code for the site... and find how the articles are set up...and where it calls for those variables.. and make it call for that information after it displays the actual "article" information.
The css is just for styling, moving things up down and left and right... not so much changing the order of information....(it can do that a tiny bit but not much)
hope that helps, good luck finding it in the code I don't know where to tell you to start looking even...