Vuetify and style isolation how to implement?

Question

css

I have a vue + vuetify app that needs to be embedded into another site.
This site turns into a mess if you integrate this application there.
How to isolate vuetify global styles?
1) Tried using block "@import" to do (stylus). But compilation errors.
2) I tried to add to the css rules (reprocess), after the project was built, the "#vue-app" prefix, but again everything worked out now in the application itself.
Something like this:

#vue-app .black {}
#vue-app .button {}

I've already run out of ideas. Help