Decreasing button font-size on mobile

Hi y'all!
I'm trying to change my button font-size on mobile. I know how to resize the buttons, but that doesn't affect the size of the text.

Didn't find any css code that works.

Any snippets or tricks would be really appreciated! Thanks!

@abbiericher You can add this code snippet within the Custom CSS panel:

@media only screen and (max-width: 640px) {
	#siteWrapper.site-wrapper .sqs-button-element--primary {
		font-size: 0.7rem !important;
	}
	#siteWrapper.site-wrapper .sqs-block-button-element {
		font-size: 0.7rem !important;
	}
}

You can adjust the font-size "0.7rem" in the code. 

Thank you @Lesum ! It's working perfectly well. Would you know how to move the button closer to the navigation?

@abbiericher if you share site url, we can help easier

Thank you all! I found a way!