Stylish issues on cart page

Hi, I am using Enfold to design a gothic clothing website. There are a few issues on the cart (http://gothicromance.staging.wpengine.com/cart/) (hosted on WPengine) which I’m hoping you can help with please:

– There’s a grey gradient on the quantity selector which doesn’t fit with the design of the site – is it possible to make this a solid colour?
– When you hover over Update Cart, the text turns back which is invisible against the background colour
– If you change the quantity in the cart and click Update Cart, the price doesn’t change
– The font sizes in the ‘Shipping’ section are inconsistent
– In the Checkout, the PayPal logo is very grainy – presumably it’s supposed to work with a black background?

I looked in the theme options but couldn’t see a way to style these elements so I’m hoping you can help please.

Many thanks