- [x] A11y review (nothing in [FAST](https://w3c.github.io/apa/fast/checklist.html) seemed relevant) - [x] I18n review (nothing in checklist applies) - [x] Privacy review ([privacy section](https://www.w3.org/TR/css-conditional-4/#privacy)) - [x] Security review - [x] TAG review [Previous wide review, CSS Conditional 3](https://github.com/w3c/csswg-drafts/issues/5569)