So, on my wiki (https://degreesoflewdity.miraheze.org/m/4K2) I tried to create a namespace "Style" so that I can split my CSS and put them into this namespace. I go into "Manage the namespaces of your wiki" and type in everything I need. But whenever I try to create the namespace (hence when I push the "send" button"), it is loading for a few second, but no new namespace is being created. Is that a bug?
I then tried to just save the css as a normal page, but that screws the whole css up. Is it even possible to split up my CSS and import the single pages into "MediaWiki:Timeless.css"? That's what I've been doing on Fandom for years, but on Miraheze I can't seem to do it, because normal pages (or MediaWiki pages) screw up the CSS.

Thanks for the help in advance!