Editing Cart Dropdown

Hello,

I am trying to change cart drop down appearance. I have played with the customize options but it does not change anything. If you add the product on the far right within the link, and then hover over the cart you will see that the style of the dropdown cart menu looks blocky and does not match the theme or colour of the website.

As I have stated, I’ve played around with the customize options but there is nothing that I can find which directly changes it. Ideally i would like the border colour to be Red with a clear background and white button text. But I have found nothing to be able to edit this.

The page I need help with: [log in to see the link]