SaadASTheDev/Inventory-Managment-System ? reverse-engineered prompt

Build me a modern pantry inventory app where users can log in, add items to their pantry, remove items, update quantities, and search through everything quickly.

I want it to feel clean and minimalist, with a dark theme that follows the user’s system settings, a responsive layout that works well on phones and desktop, and a subtle animated background so it looks polished without feeling busy. Use Firebase for authentication and real time item storage, and make the UI with Material UI so the app feels consistent and easy to use.

Please make the main experience simple, with clear controls for adding and removing items, and make sure changes update right away. If you need to check current docs for Next.js or Firebase details, go ahead and look them up online.