Site styles at editor area

Hi, I read all what I found, whatever - i dont know, how make at CK editor v3 to use my css file (of all site) at editor area.
At old version i changed "fck_editorarea_web.css" (I get there line: @import "../../../../default.css";) and all was good. But at new version i dont know how this, for me very important function, make.
(and at config file at old version i get "FCKConfig.EditorAreaCSS = FCKConfig.BasePath + 'css/fck_editorarea_web.css' ;")


thanks a lot