Hi,
Designing with CSS3 is one of my favorite jobs. I focus on refining my stylesheets to get the best look and cross-platform support.
Since you have an existing site, I can devote much more of my time to delivering the design you want.
I have experience with PHP and many of the frameworks based on it. I'm still working on fleshing out my portfolio, but please take a look at my profile. My personal site is designed using HTML5, CSS3, and PHP.