Part of my basic coding skills is stealing from other wikis. Since you're helping with CSS, I'm going to add a tag after your username, as a sort of designation. Another option is to recolour the username, like I've done with my own. Do you have any preference of colour?
My adoption request has gone through, so I'm all good to edit CSS. For you to help out, which would be great, there are two options:
I create a subpage somewhere and you add CSS, I move it over to the MediaWiki page
I promote you to admin
The problem with the first option is that it could take a 1 minute to 9 hours for me to make the change, which slows down your editing process. The problem with the second option is that you'd be expected to carry out admin duties here as well as your other wikis. My preferred option is the first, but it is entirely up to you.