Text alignment on category pages

I just got my web site set up, and I’m happy with everything except for the text alignment at the top of each category. Would like to have it justified left instead of center, but it’s obviously not as easy as to just hitting a button. I’m a total dummy when it comes to web site editing, so I’m hoping there’s a simple solution to this 🙂

The page I need help with: [log in to see the link]