"Look, I implemented diceware in pure CSS!" is unfortunately not that hard to imagine.

I would bet someone is already working on it as we speak.

I don't disagree on that point.

Introducing cryptography in the STANDARD for stylesheets adds complexity where it doesn't belong. Ultimately a browser vendor isn't responsible when a company sells insecure cryptography.

Adding crypto to CSS will bring us nearer to bitcoin mining in the CSS engine.