Change the size and color of add to cart button on the single product page

Hi,

Thank you for your theme. Could you help me adjust the size and color of the add to cart button? My site uses only variable products. I’d like the button to be black and take up the entire width of the right column. I appreciate your support.

Hi,

Please post a link to your website, to the page where you would like to modify the add to cart button, so I can give you a working solution.

Kind Regards,
Csaba

Thank you sir. Below is a link:

If at all possible, I’m trying to make it look like the attached image.