CSS tutorial

CSS is designed to enable the separation of presentation and content, including , , and . This separation can improve content ; provide more flexibility and control in the specification of presentation characteristics; enable multiple to share formatting by specifying the relevant CSS in a separate .css file, which reduces complexity and repetition in the structural content; and enable the .css file to be to improve the page load speed between the pages that share the file and its formatting.

Separation of formatting and content also makes it feasible to present the same markup page in different styles for different rendering methods, such as on-screen, in print, by voice (via speech-based browser or ), and on tactile devices. CSS also has rules for alternate formatting if the content is accessed on a .

The name cascading comes from the specified priority scheme to determine which style rule applies if more than one rule matches a particular element. This cascading priority scheme is predictable.

The CSS specifications are maintained by the (W3C). Internet media type () text/css is registered for use with CSS by RFC 2318 (March 1998). The W3C operates a free for CSS documents.

In addition to HTML, other markup languages support the use of CSS including , , , and .