Can I apply embedded style to an existing css class ?

[TechWatching]

I am not sure to understand the documentation correctly and if it's necessary to use global styles to apply style to an existing css class or if I can do only on a specific slide with embedded style.

For instance, let's say I want to add a left margin to the right column using two-columns layout. On the rendered page there is a css class col-right on the right column but using embedded style with windi css apply does not seem to work. I have seen that we can pass a class to the layout as prop but same issue, I can apply embedded style to it.

Is there something about scope or something else that prevent the embedded style to work ? What is the best way to do apply windi class to an existing class for a specific slide only ?