coupon Theme Single Store page customization for mobile with V10 Version

Hi Everyone,

I have coupon theme V10 Version installed on my site. Need help with customization of a single store with coupons for mobile version.

I cannot understand which php file need to edited.
See in the attached images. I want style which is as shown in coupon theme demo pages.

Can anyone help me with which php files I need to edit to get that desired look.