Anchored container queries

[una]

Specification

https://drafts.csswg.org/css-anchor-position-2/#anchored-container-queries

Description

container-type: anchored and a new @container anchored() query to style elements based on their anchor position

Documentation

https://developer.chrome.com/blog/anchored-container-queries

Browser support

Chrome 143+

[ddbeck]

This is a duplicate of #3403, so I'm going to close this in favor of the older issue. I've also opened #3578 to resolve it. Thank you!