message: fix: CSS custom property name interpolation
diff: @@ -39,7 +39,7 @@ $-map-type-to-prefix: (
  );
  }
  - @return (--rcx-color-#{ type }-#{ grade }, $base-color);
  + @return (--rcx-color-#{ $type }-#{ $grade }, $base-color);
  }
  @function neutral($grade, $alpha: null) {
  @@ -98,7 +98,7 @@ $-foreground-colors: (
  $color: map.get($-foreground-colors, $type);
  - @return (--rcx-color-foreground-#{ type }, $color);
  + @return (--rcx-color-foreground-#{ $type }, $color);
  }
  @function foreground($type) {
  