CSS at-rules
At-rules are CSS statements that instruct CSS how to behave. They are used to group and structure style rules and other at-rules, declare style information not directly associated with selected content, and manage syntactic constructs such as imports and namespaces keyword mappings. They begin with an at-sign, @ (U+0040 COMMERCIAL AT), followed by an identifier.
Index of at-rules and at-rule descriptors
@charset@color-profile@container@counter-style@documentNon-standard Deprecated@font-face@font-feature-values@font-palette-values@functionExperimental@import@keyframes@layer@media(see list of media features in the next section)@namespace@page@position-try@property@scope@starting-style@supports@view-transition
Index of media features
-moz-device-pixel-ratio-webkit-animation-webkit-device-pixel-ratio-webkit-transform-2d-webkit-transform-3d-webkit-transitionany-hoverany-pointeraspect-ratiocolorcolor-gamutcolor-indexdevice-aspect-ratiodevice-heightdisplay-modedynamic-rangeforced-colorsgridheighthorizontal-viewport-segmentshoverinverted-colorsmonochromeorientationoverflow-blockoverflow-inlinepointerprefers-color-schemeprefers-contrastprefers-reduced-dataprefers-reduced-motionprefers-reduced-transparencyresolutionscanscriptingshapeupdatevertical-viewport-segmentsvideo-dynamic-rangewidth
Specifications
| Specification |
|---|
| CSS Syntax Module Level 3 |
See also
- CSS at-rule functions
- Nesting at-rules
- CSS syntax module
- CSS conditional rules module