Brine eCommerce theme - change Subscribe Form Box button to lowercase

Hi. I'm using the Brine eCommerce theme. I'd like to change the buttons in the Subscribe Form Box to lowercase. How can I do that?

@harlowbogie Can you share site url?

https://www.balmylips.com/

@harlowbogie Add to Home > Design > Custom CSS

span.newsletter-form-button-label {
   text-transform: lowercase;
   font-size: 18px;
}

@harlowbogie Add to Home > Design > Custom CSS

span.newsletter-form-button-label {
   text-transform: lowercase;
   font-size: 18px;
}

@tuanphan thank you!