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CSS Academy · Lesson

Layer Priority and !important Interaction

Understand how layer order determines priority and how !important interacts with layers inversely.

Normal Declarations in Layers

For normal (non-!important) declarations, the cascade priority is:

  1. Unlayered styles (highest)
  2. Last declared layer
  3. Earlier layers (lowest)

!important in Layers — The Reversal

For !important declarations, the priority order reverses:

  1. !important in unlayered styles (lowest in !important tier)
  2. !important in first declared layer (highest)
  3. !important in later layers (lower)

All lessons in this course

  1. @layer Declaration and Ordering
  2. Adding Styles to Layers
  3. Layer Priority and !important Interaction
  4. Layers in Third-Party Code
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