CSS Versions
CSS1 - It was released as a recommendation by the W3C in December 1996. This version introduced the CSS language and a simple visual formatting model for all HTML tags.
CSS2 - It became became a W3C recommendation in May 1998, builds upon CSS1 by adding support for media-specific style sheets.
CSS3 - It is the latest version of the CSS specification. It introduces several new styling features and improvements to enhance the presentation capabilities of a website.