Cascade
The CSS algorithm that resolves conflicting declarations into a single computed value per property per element. Considers origin, importance, layer order, specificity, and source order in that sequence.
The cascade is the engine that gives CSS its name. CSS Cascading
Level 5 (2022) added the layer dimension between origin and
importance, letting authors sequence design-system rules without
specificity wars. Within a layer, specificity still resolves
ties: id > class/attribute/pseudo-class > element. The
!important modifier inverts origin order so user-agent
important wins over author important; this is rarely what
authors intend.