1. Understanding CSS3

In This Chapter

What Is a Style? 2

What Are Cascading Style Sheets? 3

The Evolution of CSS 6

CSS and HTML 8

Types of CSS Rules 9

The Parts of a CSS Rule 11

New in CSS3 13

Cascading Style Sheets, or CSS, is a language used to specify the visual appearance of a Web page—in contrast to HTML (HyperText Markup Language), which is a markup language that defines the structure of a document for distribution on the Web. HTML tells a Web browser how the content is organized on the page, whereas CSS tells the browser how it should look.

CSS3, an abbreviation for CSS Level 3, is the next generation of this style language that adds several new capabilities. It may still be under development by the W3C (World Wide Web Consortium), ...

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