For some inspiring CSS work, you can check out
www.csszengarden.com. As for a lack of design skills in general, well how much time do you want to put into this? If you actaully want to get good, I'd say grab a book on color theory and another one on shape and form in design. In four years at Art school, that's what it's all about. If you're not really that interested in dedicating a whole bunch of time, I know a few designers that work cheap. Starving art students and all that.