changkun/modern-cpp-tutorial ? reverse-engineered prompt

Build me a clean, modern website for a book called Modern C++ Tutorial, focused on teaching C++11 through C++26 in a way that feels easy to browse and read.

I want it to work like an online book, with a table of contents, chapter pages, code examples, and small exercises at the end of chapters. It should also have obvious links for reading online, downloading PDF and EPUB versions, and a mobile friendly layout so it feels good on phones and tablets too.

Please make it look polished and educational, with a simple reading experience, a clear homepage, and good navigation between chapters. If you need current setup details or docs for the tools you choose, look them up online. Also include a way to build the project locally and keep the code and content organized so it would be easy to maintain and expand later.