Thread:Bünyamin Alpaydınn/@comment-22439-20140427122909/@comment-9300845-20140614210856

CSS Editor is a page that allows you to edit the look of your wiki. In your wiki's case, it's http://tr.gumball-hayranlari.wikia.com/wiki/Special:CSS. Please note that only administrators, bureaucrats, and founders have access to that page. The CSS Editor can be accessed through "Admin Dashboard," again only accessible to administrators, bureaucrats, and founders.

I must reiterate, I know virtually nothing about creating CSS scripts, and I cannot help you very much, sorry.