Container queries in production yet?

I design in the browser almost exclusively now; mockups only for client sign-off.

Code:

:root { --accent: #4f7cff; }

— CSS variables made my theming life so much easier.

Dark mode is a one-liner media query once your colours live in variables.

:has() finally lets me style parents without JavaScript, and support is good now.

Maybe this has been discussed before, but I could not find anything recent.