pawitp/pangya-calculator ? reverse-engineered prompt

Build me a simple web app for Pangya players that helps calculate HIO distance.

I want a clean React site where someone can enter the details they know about a shot, then get the recommended distance or final HIO calculation back right away. Keep it easy to use, with a few clear inputs, a big result area, and basic checks so it does not break on bad input. If it makes sense, add a small explanation of the result so players know how to use it in game.

Make it feel like a lightweight utility, not a complex app. Since this is going to Firebase, set it up so it can be deployed there without extra hassle. Use the current best practices for a simple Create React App project, and if you need to look up anything current online, go ahead.