We are able to help you only with theme scripts, Germanized plugin is a third-party plugin that you use. We are not developers of that plugin, so I don’t have information about scripts that it uses.
Checkout works the same way even with the default Storefront theme https://gyazo.com/2fff5906a21da75dc39b6a8524163646
So, please, contact Germanized plugin author to get help with this! It’s not possible to change using CSS styles.