Add support for container queries

[Jarzka]

Hi

It seems that container queries are going to be a significant new feature in CSS:
https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Container_Queries
https://ishadeed.com/article/say-hello-to-css-container-queries/

Could we have a support for these in Garden? Perhaps a new at-rule helper at-container?

[harold]

Very interesting, had not heard of that.

Here is (I think) the relevant caniuse: https://caniuse.com/css-container-queries

• Could be useful for tracking browser adoption of this feature

[Jarzka]

Yea, it is not yet usable in any browser without flags, so there is no hurry. But I would assume it will become popular in the coming years.

[aeriksson]

@Jarzka container queries are now supported in the Chrome and Safari, so it's probably time to add support. We'd like to start using We're using container queries now for https://polytope.com.