But in components with scoped styling, you're better off just using css directly. Create a class that has all the styles you want, then use it in the HTML - nicely and cleanly separates css and HTML code.
Because they're not both style info? Html is a markup language, it applies semantic structure to your content, CSS styles html.
Classes are a tool for selecting markup to style. Sure, you can create a class for every single CSS rule you write, but just because you can doesn't mean you should.