Reduce spacing on list items

I’m looking to reduce the spacing between the list items on the left-hand side of the page. It almost looks like they are double-spaced there. Looking at the code it, seems to be class=”lcp_catlist”, but I’m not able to find the element in the stylesheet which controls the spacing.

If you can advise what code I can add to the Custom CSS to compress list items, I’d be grateful.

Thanks in advance!

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