Or you can make a catch all category for Amazon but you wouldn’t ‘link’ the card to that category. It would work like this:
0) you put a bunch of money into the Amazon category in your budget
1) you purchase X with your Amazon card
2) you enter the transaction under the Amazon card
3) you choose ‘Amazon’ as your category
4) the money ‘moves’ from that Amazon category to your Amazon credit card
5) you pay your credit card
Make sense?