Use this CSS reference to browse an alphabetical index of all of the standard CSS properties, pseudo-classes, pseudo-elements, data types, functional notations and at-rules. You can also browse key CSS concepts and a list of selectors organized by type. Also included is a brief DOM-CSS / CSSOM reference....@character-variant @charset :checked circle() clamp() clear clip-path...speak-as (@counter-style) ::spelling-error sqrt() src (@font-face)...