I think our most recent kind of nice CSS tutorial is the one over in Roleplay Theatre - it's more focused on CSS for posts but it's super applicable to signatures and the properties can also be used in flairs!
ignore some broken things we're still recovering from forum software migration lol
☆ Roleplay Theatre's CSS Guide ☆ If you've ever browsed some of the roleplay threads in these sections, you'll surely have noticed fancy posts with colorful backgrounds, images, tidbits of all sorts- and as happy as we are to remind you that none of this is necessary to roleplay...
www.pokecommunity.com
& the Get-Together just ended ofc but I made an example template for flairs so you can kind of see how it's laid out!
https://www.pokecommunity.com/media/conky-png.89546/fullHey, new recruits! Great to have you on board with Brick'n'Break! As you know, we're the primary construction company under Quasartico, Inc - and we're about to be SUPER busy. With so many projects under way all at once...
www.pokecommunity.com
i think having a sense of what you can do with css and images is very helpful when designing things for this application!