Incorporating CSS Cascade Layers To An Existing Project– Smashing
The concept behind this is to share a full, unfiltered look at integrating CSS Cascade Layers into an existing legacy codebase. In practice, it’s about refactoring existing CSS to utilize cascade layers without breaking anything. Source

The concept behind this is to share a full, unfiltered look at integrating CSS Cascade Layers into an existing legacy codebase. In practice, it’s about refactoring existing CSS to utilize cascade layers without breaking anything.
Source
