Using html themes in reacjs : First of all I want to express that i am quite new with reactjs and this question might be not very appropriate to the topic but i am just trying to enrich my knowledge about it.

I have a html/css theme and I am trying to build a application using that theme but with reactjs. Is there any way to use that theme in react?

I have used several ui libraries to create some application with react but from scratch. What would be the solution when I already have a html/css theme to use in my project with react?

Thank you.