css-cascade-layers

CSS cascade priority is controlled using @layer to establish named layers, ordering styles by purpose like reset, defaults, components, and utilities to ensure predictable overrides without specificity conflicts.

The best way to override third-party CSS styles is using @import layer(...) to pin external styles into a named cascade layer, forcing them to respect your custom layer ordering and avoiding !important hacks.

Structure CSS cascade layers by declaring a full layer stack at the top of your stylesheet, mapping ITCSS levels to named layers so resets and defaults hold lower priority than components and utilities.

Yes, CSS cascade layers can manage design tokens and theme variations by assigning token definitions and theme overrides to specific named layers, ensuring predictable priority control across large applications.

You should avoid CSS cascade layers if your project requires supporting legacy browsers lacking @layer support, or when your codebase is too small to benefit from explicit layer ordering and architectural patterns.

CSS @layer works with component libraries by assigning component styles to named layers, ensuring your design system maintains a strict cascade priority over third-party styles while remaining scalable for multi-team projects.