Ayush-dev27/SHONENFIT ? reverse-engineered prompt

Build me a web app called SHONENFIT that feels like an anime inspired fitness coach.

I want users to enter their fitness details and get a personalized training plan based on anime style themes, character archetypes, and their current level. The app should make progress feel motivating, with a ranking system that starts at Grade 4 and moves up toward Special Grade as the user keeps improving. It should look energetic and fun, with a strong anime style landing page, clear progress tracking, and a simple experience that is easy to use on desktop and mobile.

Please connect the pieces so the app can generate plans, save or show progress, and make the ranking system feel rewarding and realistic for actual fitness goals. If anything is unclear, check the existing files and look up current docs online if you need to. Make it polished enough that someone could open it and immediately understand how to start training and leveling up.