According to our guideline - roadmap.sh/frontend, CSS3 is the next section.
You can find a list of all articles in this series here - Frontend Development Series
CSS3 is the latest version of CSS.
It works with the previous versions but adds new interactive and attractive features to elements on a page.
According to Wikipedia,
CSS was introduced by Hakon Wium Lie on October 10, 1994.
Style sheets have existed in one form or another since the beginnings of Standard Generalized Markup Language (SGML) in the 1980s, and CSS was developed to provide style sheets for the web.
CSS1was released on December 17, 1996
It had support for colors and backgrounds, text formatting, alignments, margins and classification of groups of attributes.
CSS2was developed by the W3C and published as a recommendation in May 1998
It was a superset of CSS1 which adds extra features like positioning styles (absolute and the likes), media types, new font properties and so on.
CSS 3drafts were published in June 1999.
It added more features to CSS2. Examples are animations, transitions, 3D elements and choice of fonts.
Learn more about CSS History in wikipedia
That's all for CSS3. We've actually covered some of these extra capabilities in previous articles if you noticed : )
Check out all articles so far on the series here - Frontend Development Series