[rkangel]

Separating markup and styling doesn't work. One is too related to the other. Instead, we have discovered reusable components (what used to be called widgets back when we were doing native GUIs). You have your little bit of markup along with the styling information together for making a button or whatever. And then you use it (with suitable parameterisation). You combine those into bigger components etc etc.

I use the word 'components' because that's familiar to people, but there is a related concept in most modern frontend frameworks. In this world, tailwind makes so much sense. If you do it right, there is very much less in the way of shared stuff that needs find-and-replacing and you're keeping all the information you need to see how something is going to render all in one place.