CSSCSS stands for Cascading Style Sheets. CSS provides a standards-based mechanism to control fonts, colors, backgrounds, and layout for web pages. Styles can be embedded into individual HTML elements, or added to the HEAD tag of the HTML page. Styles can also be gathered together into external style sheets to help ensure uniformity across an entire web site.

TThe four example pages shown below are built from exactly the same HTML mark-up with different external style sheets applied. Use the links above the example page to view the two types of mark-up making up the web page.