How to change the style of fck editor

Question

Hi

i have php site. And iam using a style_client.css for client side. Suppose,in this , for '<h1>' tag i have given red color.

In admin side , i have integrated fckeditor, Suppose if i put a content containing '<h1>test</h1>' in fckeditor, In fckeditor, it shows in red. That means fckeditor has another style sheet with diffeent style for '<h1>.'

Which style sheet should i edit( ie which page of fckeditor), so that i can make the style for '<h1>' is red in fck editor, like it comes in client side (ie from style_client.css)