[marzetti]

Noting your comment, I couldn't resist linking to some more CSS art:

https://css-art.com/the-girl-with-a-p-e-a-r-l-css-earring/

Not sure how many centred divs are in it though...

[ChrisMarshallNY]

I always found Stuart Nicholl’s CSSPlay site fun. It’s been through a lot of changes, over the years: http://www.cssplay.co.uk/

Some of the demos are jaw-dropping, if not always practical.

[ChuckMcM]

Thanks for that link, that is a pretty amazing demo site!