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CSS, or Cascading Style Sheets, offers a flexible way to style web content, with styles originating from browser defaults, user preferences, or web designers. These styles can be applied inline, within an HTML document, or through external .css files for broader consistency.
The following example defines the same font face (Times or a default serif, 14 points, italics) in three ways: With CSS in a separate stylesheet.; With inline CSS applied to an element via the style attribute.
A web style sheet is a form of separation of content and presentation for web design in which the markup (i.e., HTML or XHTML) of a webpage contains the page's semantic content and structure, but does not define its visual layout (style). Instead, the style is defined in an external style sheet file using a style sheet language such as CSS or ...
A markup language, like HTML and less XUL, may define some primitive elements to style a document, for example <emphasis> to bold. CSS post styles a document to "screen media" or "paged media". Screen media, displayed as a single page (possibly with hyperlinks), that has a fixed horizontal width but a virtually unlimited vertical height.
HTML is used to represent the structure or content of a document, its presentation remains the sole responsibility of CSS style sheets. A default style sheet is suggested as part of the CSS standard, giving a default rendering for HTML. [14] Behavior (interactivity) is also kept separate from content, and is handled by scripts.
For some years, the World Wide Web Consortium (W3C) has been running a major Semantic Web project designed to make the whole web increasingly useful and meaningful to today's and the future's information systems.
Initially code-named "Cougar", [18] HTML 4.0 adopted many browser-specific element types and attributes, but also sought to phase out Netscape's visual markup features by marking them as deprecated in favor of style sheets. HTML 4 is an SGML application conforming to ISO 8879 – SGML. [20] April 24, 1998
The CSS Zen Garden is a World Wide Web development resource "built to demonstrate what can be accomplished visually through CSS-based design." It launched in May 2003. [1] Style sheets contributed by graphic designers from around the world are used to change the visual presentation of a single HTML file, producing hundreds of different designs ...