Cascading Styles and Selectors - HTML, CSS, and Dynamic HTML - page 1084

@ Rules
CSS supports different “@ rules” designed to run commands within a style sheet. These
commands can be used to import other styles, download font definitions, or define the
format of printed output.

@ Rule Description

@charset “ encoding ”

Defines the character set encoding used in the style sheet (this
must be the very first line in the style sheet document)

@font-face { font
descriptors }

Defines custom fonts that are available for automatic download
when needed (CSS3)

@import url( url ) media

Imports an external style sheet document into the current style
sheet, where url is the location of the external stylesheet and media
is a comma-separated list of media types (optional)

@media media { style
declaration }

Defines the media for the styles in the style declaration block,
where media is a comma-separated list of media types
@namespace prefix url( url ) Defines the namespace used by selectors in the style sheet, where
prefix is the local namespace prefix (optional) and url is the unique
namespace identifier; the @namespace rule must come before all
CSS selectors (CSS3)

@page label pseudo-class
{ styles }

Defines the properties of a printed page, where label is a label
given to the page (optional), pseudo-class is one of the CSS
pseudo-classes designed for printed pages, and styles are the
styles associated with the page

Miscellaneous Syntax
The following syntax elements do not fit into the previous categories but are useful in
constructing CSS style sheets.

Item Description

style !important

Places high importance on the preceding style , overriding the usual rules for
inheritance and cascading

/* comment */

Attaches a comment to the style sheet