Forum:Shrinking Monobook CSS

For a number of reasons that I need not go into, I cannot easily use the "Oasis" / "New Wikia Look" skin. However, one of the wikis I edit at, Final Fantasy Wiki, has a number of pages 'broken', etc. by the Oasis / New Wikia Look skin. Well, I edit in Monobook, but I wish to be able to help make the fixes in Oasis. The best way to do that, of course, would be use User:Catuse167/Monobook.css to shrink Monobook's page width to 647px. However, I do not know which classes to use, or even if I'm doing it correctly. You can see my attempts at http://finalfantasy.wikia.com/wiki/User:Catuse167/monobook.css. What do I do, exactly? Catuse167 02:07, January 1, 2012 (UTC)