[Plugin: DRP Coupon] Centering coupon code box

Hi all,

When I add the coupons to a post, the coupons are left aligned. When I attempt to centre it, only the title and description of the coupon becomes centres and the coupon code box remains left aligned. Anyone know how I can move the coupon code box in order to have it centred?

Thanks

https://www.ads-software.com/extend/plugins/drp-coupon/