Add a gradient color style to the add to cart product button. This plugin uses css editor and works with all template families.

From your Squarespace account, go to the Custom CSS Editor. Copy and paste the code below into the Custom CSS Editor box.

Swap out both of the background color values with the colors of your choice.

Adjust the font size and padding values to your liking. The higher the box shadow and padding px = the bigger the button.