Checkout & payments

Send and receive panels with a flip button; the converted amount rolls into place.

A monthly/yearly switch whose thumb slides and rolls the price digits, with the saving called out.

A promo-code row: Apply shows a spinner, a valid code becomes a removable chip and the total counts down.

Percentage tip buttons that show the cash amount under each, plus a Custom option that opens a small input.

A cart nudge showing how far you are from free shipping; the bar fills and the message flips when unlocked.

Cart rows with quantity steppers and Remove that collapses the row behind an Undo bar for a few seconds.

A paper-style receipt: items, tax and a tip you can change after the fact, a torn edge, and share or download actions.

Send a gift card: pick an amount or type one, write a note, preview the card face, and choose send now or on a date.

Build a bundle: pick items into numbered slots, the discount tier steps up as slots fill, and the saving is shown live.