eShop post page background

Hello! First-time poster.

at the bottom of my post page, where the eShop options are (add to cart, color, price, and quantity), there is a border, which looks only 1px and maybe #ccc color. I can’t for the life of me figure out where I need to edit to get rid of the border, or change the background color of the eShop portion of the post.

Please help! I’ve got the uploads/eshop_files/eshop.css file in my upload folder, but nothing else. I have tried to edit colors of backgrounds/borders in both dreamweaver and through Appearance > eShop in my dashboard, but to no avail.

Any tips would be great, Thank you!