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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
- @counter-style/additive-symbols
- @counter-style/fallback
- @counter-style/negative
- @counter-style/pad
- @counter-style/prefix
- @counter-style/range
- @counter-style/speak-as
- @counter-style/suffix
- @counter-style/symbols
- @counter-style/system
@custom-media
@document Deprecated
@font-face
- @font-face/ascent-override
- @font-face/descent-override
- @font-face/font-display
- @font-face/font-family
- @font-face/font-feature-settings
- @font-face/font-stretch
- @font-face/font-style
- @font-face/font-variation-settings
- @font-face/font-weight
- @font-face/line-gap-override
- @font-face/size-adjust
- @font-face/src
- @font-face/unicode-range
@font-feature-values
- @font-feature-values/font-display
@font-palette-values
- @font-palette-values/base-palette
- @font-palette-values/font-family
- @font-palette-values/override-colors
@function Experimental
@import
@keyframes
@layer
@media (see list of media features in the next section)
@namespace
@page
- @page/page-orientation
- @page/size
@position-try
@property
- @property/inherits
- @property/initial-value
- @property/syntax
@scope
@starting-style
@supports
@view-transition

Index of media features

@media/-moz-device-pixel-ratio
@media/-webkit-animation
@media/-webkit-device-pixel-ratio
@media/-webkit-transform-2d
@media/-webkit-transform-3d
@media/-webkit-transition
@media/any-hover
@media/any-pointer
@media/aspect-ratio
@media/color
@media/color-gamut
@media/color-index
@media/device-aspect-ratio
@media/device-height
@media/display-mode
@media/dynamic-range
@media/forced-colors
@media/grid
@media/height
@media/horizontal-viewport-segments
@media/hover
@media/inverted-colors
@media/monochrome
@media/orientation
@media/overflow-block
@media/overflow-inline
@media/pointer
@media/prefers-color-scheme
@media/prefers-contrast
@media/prefers-reduced-data
@media/prefers-reduced-motion
@media/prefers-reduced-transparency
@media/resolution
@media/scan
@media/scripting
@media/shape
@media/update
@media/vertical-viewport-segments
@media/video-dynamic-range
@media/width

Specifications

SpecificationsStandards references are available on the canonical MDN page.

Index of at-rules and at-rule descriptors

Index of media features

Specifications

See also