Nested Media Queries Work in Native CSS — From the Root

CSS doesn’t currently have “regular” nesting. There is a pre-spec floating around that could make it a reality someday, but that draft doesn’t mention media queries at all. If native nesting ever lands, media query support should arguably come right out of the gate — it might even be more valuable than selector nesting, which is arguably the most useful feature of preprocessors like Sass today.

That said, nesting media queries is already possible in native CSS today — as long as you’re nesting them from the root level. It’s surprising to see in vanilla CSS, but it works.