Make one HTML page: a mobile music player screen (390 x 844) for a song called "Neon Rain" by an artist called Ivy Park. Album art drawn in code, a progress bar that moves, play/pause, next/previous, a lyrics card, and an "up next" list. It should feel like a real app you would want to use, not a wireframe. The song plays by itself when the page opens (silent, just the UI moving). No images, no external libraries, no network requests. Write it in one go: don't open it in a browser or test it. Just deliver the file.