What is CSS?

[yamamura]

Cascading Style Sheets (CSS) is a simple mechanism for adding style (e.g., fonts, colors, spacing) to Web documents.



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[elenabrown]

A Cascading Style Sheet (CSS) is a Web page derived from multiple sources with a defined order of precedence where the definitions of any style element conflict.

CSS is used to style Web pages. But there is more to it than that. CSS is used to style XHTML and XML markup. This means that anywhere you have XML markup (including XHTML) you can use CSS to define how it will look.
CSS is also used to define how Web pages should look when viewed in other media than a Web browser.

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