samuelwjq/econwidgets-preview ? reverse-engineered prompt

Build me a simple GitHub Pages site that previews a bunch of interactive economics widgets in the browser.

It should let a student open different topics like supply and demand, elasticity, production possibility curves, externalities, government intervention, and imperfect information, then view each widget on its own page or panel. Make it easy to switch between them from a main landing page, and include a clean, classroom friendly look that works well on desktop and mobile.

The widgets should feel interactive, not just static charts, and there should be basic controls like help, fullscreen, and clear labels so someone can understand what they are looking at. If it helps, organize it so new widgets can be added later without much work.

Use current browser friendly HTML and JavaScript, and if you need to look up anything specific about how the diagrams or embeds should work, check the latest docs online first.