Down to the basics, I copied it from the Club Penguin Wiki, but I can tell you what I can understand from the css.
This is the basic code for the template. Each code has a /* */ next to it showing what that specific line does. Sorry for not explaining too well haha, I'm not the best at CSS as other people I've seen but I hope I helped a little bit.
Edit :L Sorry for the messy format, I forgot how wikitext works in messaging but go to the MediaWiki:Common.css and scroll down to find the ambox section. It should say it was taken from the club penguin wiki and read through it for some possible help. :) Ugh, this message is so messy.
okay so have you ever seen that other webtoon wiki? (webtoons.wikia.com) well yesterday the owner was like "oh hey since you've msged me like once here's the wiki i can't take care of it anymore" and honestly i'm just...idek what i'm feeling rn
anyway i was thinking about merging them, gonna have to read up on that cc help page again so i can remember what to do lol
but just as a heads up, i might merge them, we'll see, i'll have to create a blog post. the original owner already gave me the thumbs up for merging soo yepp