Change the Font Size of 'Add to Cart' - 7.0

How can I increase the font size of the text 'Add to Cart' in the button? Find a screenshot attached. I am using SQSP 7.0

Website is:

Thank you!

If you can't find an option in Site Styles to change this, you can add this code to Website > Website Tools (under Not Linked) > Custom CSS

div#productDetails .sqs-add-to-cart-button-inner {
    font-size: 10px !important;
}