I've been looking everywhere for this, but I can't believe I'm the only one who wants this, so I must probably be blind or dumb.
Anyway, what I want is to be able to style the post editing area in the WP admin area with CSS, so that when I write or edit a post, I have the same fonts, the same width and the same image styling as on the front. But I can't seem to find the CSS-file that controls this.
So basically, can anyone tell me what file(s) style the post editing area?