Saturation UI copies component source into your project via the shadcn registry (no npm package). If Tailwind v4 isn't scanning your components directory, add this to your CSS entry file:
@source "../components";
This ensures all utility classes in CVA variants and data attribute selectors are included in your build.
Usage
import { Tabs, TabsContent, TabsList, TabsTrigger,} from "@/components/ui/tabs"