imahmadzohaib/Happy-Birthday ? reverse-engineered prompt

Build me a magical birthday surprise page for someone special. I want it to feel cute, romantic, and playful, with everything in one simple HTML file that I can open or publish on GitHub Pages. The page should have an animated opening moment with fireworks or sparkles, a typewriter style birthday message, a gift box that opens with confetti, floating hearts and balloons, and a glowing cursor trail or sparkle effect to make it feel extra special.

Make it work nicely on phones and desktop screens, and add smooth fade transitions so it feels like a little experience instead of just one static page. Use plain HTML, CSS, and JavaScript, and keep it easy for me to edit the name and message later. If you need to check anything current, look up the latest docs online.