Itz-Murali/Happy-BirthDay-Ai ? reverse-engineered prompt

Build me a simple happy birthday website that feels fun and cute, with a clean design and a big birthday greeting front and center. I want the message to be easy to change so I can personalize it for different people, and I’d like some nice birthday visuals like colors, animation, or a festive layout that makes it feel special.

Please also include optional background music that can play on the page if I want it, but the site should still work nicely if I leave it off. Keep it lightweight and easy to open in a browser, with everything in one place so I can edit the text and style without much hassle.

Make it look good on phone and desktop, and if you need to check anything current, look up the latest docs online.