== should format layer value ==

@layer base {
  p { max-width: 70ch; }
}

@layer framework {
  @layer base {
    p { margin-block: 0.75em; }
  }

  @layer theme {
    p { color: #222; }
  }
}

@layer reset.type {
  [hidden] { display: none; }
}

[expect]
@layer base {
    p {
        max-width: 70ch;
    }
}

@layer framework {
    @layer base {
        p {
            margin-block: 0.75em;
        }
    }

    @layer theme {
        p {
            color: #222;
        }
    }
}

@layer reset.type {
    [hidden] {
        display: none;
    }
}