Cascading style sheets (CSS) define the layout of Web pages. They can be used to define text styles, table sizes, and other aspects of Web pages that previously could be defined only in HTML. CSS helps Web developers create a uniform look across multiple Web pages contained in a website. Instead of defining styles in each Web page, commonly used styles can be defined once in a CSS file and used for any Web page that references it.
This section provides the following information about CSS: