A: Yes. Discount Deck supports design customization in the following two ways.
For stores that want to make minor visual tweaks
Go to Online Store > Themes > Edit theme
Open Custom CSS
Add your own CSS to adjust visual styles
This option is suitable if you only need small design refinements.
For stores that want full control over the design
If you want to fully customize the coupon list layout and styling, you can implement your own storefront rendering.
Coupon ownership data is stored in the customer metafield
discount-deck.discount-code-listThe data is saved in JSON format
By reading this metafield and rendering it on any storefront page, you can design and display the coupon list using your own layout and UI
For more details, please refer to the documentation linked below.