psycho789/asciiline ? reverse-engineered prompt

Build me a simple static demo site that runs entirely in the browser and lets people see an image or video transformed into ASCII art and pixel style rendering.

I want a clean single page experience that works well on GitHub Pages, with a simple upload area or sample media, a preview section, and controls for changing how dense or blocky the output looks. It should feel fast and lightweight, and it should work without a server.

Please make the page look polished, with a dark theme and good spacing, and keep the interface easy for anyone to use. If you need to check current browser APIs or best practices, look them up online. Also make sure the project is set up so it can be opened directly and deployed as a static site.