Prompt: Design a compelling user interface (UI) and user experience (UX) for a web platform. Center the design around a card housing a table. Each row of the table should convey relevant information, while an unique interactive feature, reminiscent of a piano, is integrated between the rows. This feature takes the form of a circular button, providing users with the ability to dynamically add new list entries. Upon clicking the button, it should expand to accommodate the input of new information. The design should balance aesthetics and functionality, emphasizing improved user interaction and usability. Ensure that the color palette aligns with MidJourney's brand colors, and that the UI functions seamlessly across various devices and screen sizes. Provide a brief documentation explaining the design decisions and how the piano-inspired feature enhances the user experience.