The CSS Working Group has published a First Public Working Group Note of CSS Snapshot 2020. This document collects together into one definition all the specs that together form the current state of Cascading Style Sheets (CSS) as of 2020. The primary audience is CSS implementers, not CSS authors, as this definition includes modules by specification stability, not Web browser adoption rate.
CSS is a language for describing the rendering of structured documents (such as HTML and XML) on screen, on paper, etc.
Original source: https://www.w3.org/blog/news/archives/8820