Managing Specificity Chaos

Cascade layers are one of CSS's most powerful innovations. They allow grouping styles into " layers " and explicitly specifying which layer is more important, regardless of selector weights within them.

Why Do We Need This?

Imagine you're using a third-party style library. You want to change the button color, but the library's selector is so complex you have to write a long chain or use !important. The @layer solves this.

How to Use:

/* Define layer order. Last in list = highest priority */
@layer reset, base, layout, components;

@layer components {
  .btn {
    background: blue; /* Even if this is just a class... */
  }
}

@layer base {
  button {
    background: red !important; /* ...styles from base layer are weaker than components */
  }
}