Customize CSS / Add code to POS App

Hello, i am demoing the plugin for an upcoming project and had some questions since i cannot figure out how to customize the main app (it appears to have been coded in angular which is something i don’t have experience with).

Is there another way to customize the CSS of the plugin that is not in the settings menu? Do you have a list of class names? I tried to change the background color of the login page and couldn’t figure it out.

Can we add content to the POS App. Say for example i want to add a logo on the login screen – how can that be done in the paid plugin?

I mainly want to change the colour scheme and remove some features (like reports and transaction page) for cashiers and allow them only for managers.
Kind regards
-Luan

P.S The only way to communicate with you without having bought the app from codecanyon is here, if there is an email for pre-purchase questions and support please write it so i can contact you.