I've been doing almost the opposite - enhancing and extending valid CSS stylesheets by using JavaScript to define new features and functionality to be made acce

I've been doing almost the opposite - enhancing and extending valid CSS stylesheets by using JavaScript to define new features and functionality to be made accessible and usable by writing valid CSS. An overview of my tooling and workflow is here: https://github.com/tomhodgins/caffeinated-style-sheets https://github.com/tomhodgins/caffeinated-style-sheets The big idea being that CSS should be able to apply to _any_ HTML, no matter how it was created before it got to the browser. Many style-related tools integrate tightly into your framework or into one particular workflow but don't give you the flexibility you need to apply any styles to any website unless it happened to be put together with specific tools a specific way, but I don't think that provides enough flexibility.