I used Stitch as the starting point for the entire design process. First, I created a detailed design.md document describing the app's requirements, visual style, and user experience goals. After uploading it to Stitch, I used the generated design system and layout concepts as a foundation for the project. I iterated on the designs using additional bookshelf-inspired references, refined screens such as the home page, book details page, audiobook generation flow, and audio narration page, and explored different visual directions until I reached the final design. Once the UI was finalized, I exported the design references and assets and used them in Antigravity IDE to build the Flutter application, adding functionality, interactions, and animations to create the final working product.