programmeraj2011/PeriodicX ? reverse-engineered prompt

Build me a polished interactive chemistry learning site called PeriodicX.

I want a modern periodic table where I can click any of the 118 elements and instantly see a clear element card with the basics, like atomic number, symbol, mass, group, period, electron configuration, properties, discovery info, and a few fun facts. Please make it easy to search by name, symbol, atomic number, or category, and add a compare view so I can put two elements side by side.

I also want study features that make this useful for students, like flashcards, random study mode, a quiz page with scoring and progress, and simple badges or feedback when I do well. If possible, add a section for real world uses of each element, and make the whole thing feel interactive, colorful, and easy to use on mobile.

If you need to look up anything to finish the details cleanly, feel free to check current docs online.