philipwalton/solved-by-flexbox ? reverse-engineered prompt

Build me a clean little showcase site about how Flexbox makes layout problems easy.

It should feel like a demo gallery, with a simple homepage that lists a bunch of common layout examples and lets me open each one to see the result. Keep the pages polished and readable, with code and visual examples side by side where it makes sense. I want it to be easy to run locally, update, and preview in the browser as I edit things.

Please make sure the site is responsive and works well on different screen sizes, since the whole point is to show how flexible these layouts are. Keep the styling simple and modern, and organize the content so it is easy to add more examples later. If you need to, look up current docs online for the best way to set up and run the site.