Hello,
1. Please go to Edit page > [8theme] Layout options > http://prntscr.com/jaorva
Read more – https://xstore.helpscoutdocs.com/article/45-8theme-page-post-layout-settings-8theme-post-options
2. Your site under maintenance mode, so I can’t check it.
Please try this code:
.shopping-container .cart-popup-container {
background-color: red;
border-color: red;
}
Regards