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Style Web Documents and User Interfaces with CSS

Explore the role of CSS in styling web documents and user interfaces. Understand CSS history, its relationship with HTML, the box model, selectors, and how CSS rules determine page presentation. This lesson helps you grasp fundamental styling concepts needed for building functional, visually structured web applications.

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The history of CSS

The first sketch of CSS was proposed in October 1994 by Håkon W. Lie, who later became the CTO of the browser vendor Opera. While the official CSS1 standard dates back to December 1996, Opera documentation states that “most of it was hammered out on a whiteboard in Sophia-Antipolis” by Lie together with computer scientist Bert Bos in July of 1995.

What is CSS?

While HTML is used for ...