The Category menu gets a bit messy when you have a lot of categories.

- I want to try to center the categories on the page, where do I have to edit what? (style.css, header.tpl?)
- I want the background images to have all rounded corners, the image is streched - where to fix? (style.css, header.tpl?)

Or else I want to make a dropdown menu like in the JobberBase themes, is that a lot of work?

Thanks,