fix: dark mode payment

Author: rebelchris

packages/webapp/pages/pay.tsx

@@ -37,7 +37,9 @@ const PayPage = (): ReactElement => {
       <NextSeo nofollow noindex />
       <div className="m-auto flex h-full w-full flex-col gap-6 laptop:h-fit laptop:w-[34.875rem]">
         <div className="flex w-full flex-1 justify-center bg-background-default">
-          <div className="checkout-container" />
+          <div className="mt-10 flex-1 rounded-16 border border-border-subtlest-tertiary bg-black p-6">
+            <div className="checkout-container" />
+          </div>
         </div>
       </div>
     </>