Take "set layout_type = "one-column";" out of your CSS. It's breaking your page. Code like that goes in the theme layer only. What you're using is not your theme layer. It's the Custom CSS box. :)

Also (after checking through your CSS some more) I see you're mixing s2 (a take-off on Perl, basically) into your CSS. When you put it within curly brackets like it is now I don't think it'll do much harm, but since you're feeding it through a style sheet, not the compiler, I don't think it's going to do much of anything useful, either. Just a thought...