BlommeJan/earmuff ? reverse-engineered prompt

Build me a calm focus website called Earmuff that feels like a cozy place to work in.

I want a landing page where people can pick from lots of animated ambient scenes like rain at a window, a campfire, a night train, a snowy cabin, a library nook, and other relaxing places. Each scene should have matching background sounds that loop nicely, and users should be able to mix multiple sounds together and control each one separately. Add lo fi music that plays continuously in the browser, plus the option to upload their own audio if they want.

Also include a simple Pomodoro timer and a small task list so people can stay on track. It should be free, have no sign up, no ads, and work offline after the first visit. Make it feel warm, minimal, and very focused, with a design that works nicely on desktop and mobile, and let people add it to their home screen like an app.