Prompt

Make a birthday card for a friend, warm and simple. Make it a single HTML file that opens in a browser with nothing to install and no other files. Put the CSS and JavaScript inside it. Do not use image files or any external address; use emoji or letters if you need a symbol.

The card fills the screen. A name, a short message, and something that moves gently when the page opens — confetti drifting down, or the words arriving one line at a time.

Let me change the name and the message by clicking on them and typing. What I change stays after the browser is closed, so the card is ready to share.

Keep the animation short and let it finish. Something that keeps moving forever is tiring to look at.

It has to look right on a phone held upright. That is where it will be opened.

When you are done, check it still reads well on a narrow screen and that the text does not spill off the edge.