CSS Expert needed to undertake some changes on our website

We have a website with Volusion (eCommerce platform). We used one of their templates for the design we liked, now we have to make a few changes to the look of the template. We need a CSS and HTML superstar who can: - change text/link colors in the css file - position images to our liking within the CSS - integrate social media buttons into our CSS - some more very similar, minor tasks. It's a clean CSS and there are no bugs, so it shouldn't take too long for somebody who knows CSS and coding. We just want to outsource this to concentrate on what we're better at. We might have some more tasks in regards to the CSS and html and would like to establish a long-term work relationship with a freelancer.