CSS definitions, called selectors, can be embedded in the head part of a Web page where more technical bits are stowed, or put into a separate file that Web pages can reference, creating a central ...

An often-overlooked website performance bottleneck occurs in processing cascading style sheets and the subsequent application of CSS selectors across a webpage's document object model. To speed up how ...

Learn how cascading style sheets (CSS) work, and how they can help you properly create HTML page layouts that conform to industry best practices.