Introduction
CSS Layers, or @layer, is a tool for controlling the cascade order. With layers, you explicitly define which styles take priority, regardless of specificity.
Why you need layers
In large projects, specificity becomes unmanageable. @layer lets you declare priorities: framework, design, components, utilities. Each layer has a fixed order.
How to define layers
Use @layer base, components, utilities; to declare the order. Then wrap your styles: @layer base { ... }. Later layers take priority.
Anonymous and nested layers
You can have unnamed layers and layers within layers. Useful for separating third-party library styles from yours.
Usage with frameworks
Import Tailwind or Bootstrap in a base layer and override without fighting specificity. No !important, no complex selectors.
Conclusion
CSS Layers returns cascade control to the developer. At Vynta, we organize complex projects with @layer to maintain maintainable CSS.