1. CSS Feature Queries

    CSS Feature Queries allow authors to condition rules based on whether particular property declarations are supported in CSS using the @supports at rule.

  2. CSS font-palette

    The font-palette CSS property allows selecting a palette from a color font. In combination with the `@font-palette-values` at-rule, custom palettes can be defined.

  3. css at-rule: `@property`

  4. css at-rule: `@property`: `inherits` descriptor

  5. css at-rule: `@property`: `initial-value` descriptor

  6. css at-rule: `@property`: `syntax` descriptor