This design features a dark-themed modal for upgrading to a plus plan of a service. The modal is split into two sections, with the left side dedicated to entering payment information such as the card number, expiration, CVV, and billing address. The right side offers billing options, including a toggle between monthly and annual payments, and an add-on selection for an AI Assistant service. An 'Upgrade to Plus' button is prominently displayed at the bottom, with a note about agreeing to terms and conditions. The layout is clean, with a minimalistic approach that uses clear typography and ample space to avoid clutter.