Repositioning the divs & design for popup upsell

Hey i want to make my popup upsell design as same as the picture i have attached here in thread can you please provide me the css code for this upsell design ? i want the upper div to be shown below like continue shopping or go to checkout button should be at the right under corner and lower div to be shown upper more over on scroll feature of mobile view i want add to cart button to be shown not the add to cart icon.