Product picture dissappearing on mobile in cart

hi

I have the issue that the picture of the product appears on the desk top but disappears on mobile view also
1. How do i change the background from grey to white
2. black border line all the way around
3. and give the quantity box the same look as the one in the ISSUE upfront template
4. reduce the font of the product price and remove tax inclusive

[image pos="0"][image pos="0"]

I have attached a picture but you can feel free to add an item to cart and check out on mobile

regards and thanks my site is coming along nicely