Actually I didnt figure it out, now the quantity button is big on the mobile side. So i need help making the quantity button the same size as the buy now button and I want both buttons to be black and the writing to be white

puresurge.store

I figured out how to make the quantity button and the buy  now button now im trying to figure out how to make them black and the words white

puresurge.store I figured out how to make the quantity button and the buy  now button now im trying to figure out how to make them black and the words white 

I need a code to make my quantity button and my add to cart button the same size also i would like for the button to be black and the text to be white. Im using the refresh theme.