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CSS CSS is used to control the style
and layout of multiple Web pages all at once. CSS gives you total control of the layout, without messing up the document content.
Cascading Style Sheets (CSS)
is a style
sheet language used
for describing the look
and formatting of
a document written in a markup
language.
While most often used to style web
pages and interfaces written
in HTML and XHTML,
the language can be applied to any kind of XML document,
including plain
XML, SVG and XUL.
CSS is designed primarily to enable the separation of document content
from document presentation, including elements such as the layout, colors,
and fonts.[1] This
separation can improve content accessibility,
provide more flexibility and control in the specification of
presentation characteristics, enable multiple pages to share formatting,
and reduce complexity and repetition in the structural content (such as
by allowing for tableless
web design).
CSS can also allow the same markup page to be presented in different
styles for different rendering methods, such as on-screen, in print, by
voice (when read out by a speech-based browser or screen
reader)
and on Braille-based,
tactile devices. It can also be used to allow the web page to display
differently depending on the screen size or device on which it is being
viewed. While the author of a document typically links that document to
a CSS file, readers can use a different style sheet, perhaps one on
their own computer, to override the one the author has specified.
However if the author or the reader did not link the document to a
specific style sheet the default style of the browser will be applied. CSS specifies a priority scheme to determine which style rules apply if more than one rule matches against a particular element. In this so-called cascade, priorities or weights are calculated and assigned to rules, so that the results are predic
The CSS specifications are maintained by the World
Wide Web Consortium (W3C).
Internet media type (MIME
type) text/css is
registered for use with CSS by RFC
2318(March
1998), and they also operate a free CSS
validation service.[2]
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