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Last updated at 7:49 pm UTC on 5 November 2020

Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language such as HTML. SVG also supports the use of CSS.

CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript.


Unlike CSS 2, which is a large single specification defining various features, CSS 3 is divided into several separate documents called "modules". Each module adds new capabilities or extends features defined in CSS 2, preserving backward compatibility.

css3-box : CSS3 basic box model


css3-multicol : https://www.w3.org/TR/css-multicol-1/

css3-page : http://www.w3.org/TR/css3-page/



One of flexbox's advantages is the ability to easily align items within the container to the center of a page, both vertically and horizontally.

 display: flex;
 align-items: center;
 justify-content: center;

See TableLayout