Same content and math in all three. Pick a direction.
Faithful two-column checkout in the site's dark teal glass. Plan selector left, sticky order summary right.
Fixed near-black product panel on the right, calm light form on the left. Receipt-style math.
Cleaner rebuild: 3-step progress, trust row up front, price on the CTA and a mobile sticky total bar.
Direct link also fires the webhook on plans load: /checkout/v1