CSS-design for single page

I need a design for only one single page. A preliminary design is given and looks like the attached image. I would like to see a design in the style of twitter.com. Slightly rounded-edges, eye-catchy simplistic style for the 2.0 aera. The general layout shall be more or less be maintained as in the preliminary design. HTML is given and hopefully does not need to be modified. The job is to deliver CSS and images (for rounded-edges etc.). I'm a professional web-programming freelancer. This particular job is for a personal project of mine. I would appreciate seeing some of your previous related work.