Disable CSS “print-format”

I created an invoice as HTML and built in my own CSS. Unfortunately, all undefined CSS items are drawn from the ERPnext class “print-format”. This ensures that my invoice does not move out as it should.
Does somebody has any idea?
In ERPNext my invoice looks like this - since padding is drawn from “print-format” that doesn’t belong there:

Overwrite the print-format class and add the !important if necessary.

there are too many classes and attributes for that. In addition, this is already used! Important. There must be a possibility that the bill eg. loaded in an iframe!