I just want to double check if there is ok to add custom styles on classes that shows as human readable and rendered with the new universal login screen, such as _social-button-oidc for instance? This class name shows up if you add social buttons for instance for the login screen.
From the documentation the only thing that is only recommended some fever options such as _hide-prompt-logo and _use-custom-prompt-logo, but there are other class names available as well.
Generally, it’s possible to change the human-readable classes, but there may be some unintended side effects. It’s also not mentioned as officially supported in the doc, and you would be doing this at your own risk.