How can I modify the pop-up design after adding an item to the bag?

Store Design
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1

hi, when i add a item to my bag on my website there is a pop up, with ‘view bag’, ‘check out’ and ‘continue shopping’
i want ‘check out’ and ‘continue shopping’ to have the same rectangle as ‘view bag’
and i want for ‘check out’ the rectangle to be black and the letters to be white, this way it pops out
last thing i want is to remove the line under ‘continue shopping’
can someone help me?

2

Use this code and i did for now in theme

.cart-notification-wrapper .cart-notification{border: 1px solid #000;}
#cart-notification-form .button{background: #000; color: #fff;}
.cart-notification__links .link {width: 100%; height: 100%; padding: 15px 0; border: 1px solid; text-decoration: none;}