CSS in a list style screen view

Is there a way to insert CSS to a list style screen view?
How can I customize it? I just need some left to right adjustments nothing special.
I started designing the app in terms of CSS after I built it and I just don’t want to re-write everything using a detail screen with inline list. Lots of actions…

No, as far as I know, it is possible to add css only in the detail screens because, in fact, it is done with the Rt component.