HariKrishna-28/Quizoid ? reverse-engineered prompt

Build me a fun online quiz app called Quizoid where people can sign up, log in, pick from sixteen quiz categories, and play against others to climb a leaderboard.

I want it to feel game like and modern, with a clean, colorful interface and smooth mobile friendly design. The app should pull trivia questions from an online trivia source, keep track of scores for each player, and show where they rank compared with other users. Make the whole flow simple, from choosing a category to answering questions to seeing results and leaderboard placement.

Please use React for the app, Firebase for authentication and saving user and score data, and Tailwind for the styling. If you need to check current docs or best practices, go ahead and look them up online. Focus on making it polished, easy to use, and ready to deploy.