Talk:Admins/@comment-38576179-20190417124800/@comment-30076690-20190417195615

for changing their ranks go to contributions - user rights management - check/uncheck the boxes you want and go to the bottom of the page to apply/save your changes (save user groups)

for CSS - you'll have to look up how CSS works. go to mediawiki:wikia.css on our wiki to get an example.