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Hi there! your layout works well, but part of the challenge is to build also a mobile friendly layout, so you should consider width like 320/375 pixels, you can achieve with media queries to target different resolution or also resize automatically with calc() or min() and clamp() for text. In general best practice is to build your pages firstly on mobile layout and then expand to larger screens.

Lastly you could consider to add an hover animation on the "proceed to payment" button. Something like this: transition: 300ms background-color ease-in-out;

Hope to have been helpful! Cheers