Quantity Input Text Color Issue – Need CSS Fix

Hi,

I hope you’re doing well.

I have a website called https://mythicpullstcg.com/, and I’m trying to resolve one small issue related to the product quantity input field.

Specifically, on the single product page, cart, checkout, or anywhere else that displays the product quantity box, I’d like to change the placeholder and text color inside the quantity input to white — currently it’s not visible on darker backgrounds.

I’m attaching an image for your reference so you can see exactly which input field I’m referring to.

Could you please provide me with the correct custom CSS to apply this change site-wide?

Thanks in advance!