CSS At-rules Reference

@charset Specifies the character encoding used in the style sheet @container Define styles for elements in container, depending on the container's size or style

Specifies a custom font with which to display text

@import Allows you to import a style sheet into another style sheet @keyframes Controls the steps in an animation by defining styles for points along the animation sequence @layer Used to control how the CSS cascade layers evaluates the order of styles @media Applies parts of a style sheet based on the result of one or more media queries @namespace Defines an XML namespace to be used in the style sheet @page Customizes the dimension, orientation, and margins of printed pages @property Allows you to define custom CSS properties directly in the stylesheet without having to run any JavaScript. This at-rule has data type checking and constraining, sets default values, and defines whether the property can inherit values or not @scope Allows you to select elements in specific DOM subtrees and target elements precisely without writing overly-specific selectors

Defines an element's starting styles before the element gets its first style update @supports Used to test whether a browser supports a CSS feature