CSS Anchor Positioning Level 2
@container discrete(type): fallback

CSS Conditional Rules Module Level 5
@container range(type): width
@container range(type): height
@container range(type): inline-size
@container range(type): block-size
@container range(type): aspect-ratio
@container discrete(type): orientation
@container discrete(type): stuck
@container discrete(type): snapped
@container discrete(type): scrollable
@container discrete(type): scrolled

CSS Fonts Module Level 4
@font-feature-values at-rule(type): @stylistic
@font-feature-values at-rule(type): @historical-forms
@font-feature-values at-rule(type): @styleset
@font-feature-values at-rule(type): @character-variant
@font-feature-values at-rule(type): @swash
@font-feature-values at-rule(type): @ornaments
@font-feature-values at-rule(type): @annotation

