A one-click express purchase button for the OpenCart product page. Buy Now posts the exact same payload as the theme's own Add to Cart flow - selected options, quantity and subscription plan are all preserved - and then redirects the shopper directly to checkout, removing the cart-review step that leaks conversions. Required options are respected: if the core rejects the add, the error is shown next to the button and no redirect happens. Position (before or after Add to Cart), label and colour are configurable, and the label colour is chosen automatically for contrast. Injected by event - no core file edits.