RogerPerowne/Econos — reverse-engineered prompt

Build me an A Level Economics revision web app called Econos. It should feel like a polished student study tool with three main flows, Learn it, Link it, and Land it.

Students should log in with a simple demo gate, see a topic grid, choose a topic, then work through revision cards, linked reasoning stations, essay landing sections, and quizzes. It needs to remember progress in the browser so students can leave and come back. Keep it fast, responsive, and usable on mobile, with a clear sidebar or mobile navigation, progress display, and accessible pages.

Please keep the structure simple as a static JavaScript app. Use a small number of shared HTML entry pages, not a new page for every topic or activity. Topics and activities should come from data files so I can add more economics content later without rebuilding the whole app. Use the existing visual style idea, clean typography, self hosted fonts, and a friendly revision product feel.

Add tests for the main journeys and make sure it builds cleanly. Look up current docs online if you need to.