You might be familiar with the W3's CSS Technical Architecture Group's (TAG) Houdini task force, which started around 2015 (2014 http://lists.w3.org/Archives/Public/public-wtf/2014Dec/0003.... ) to solve the problem you've mentioned. And it's looking quite good nowadays: http://snugug.github.io/magic-tricks-with-houdini/#/2/1/1