techblitzdev/TechBlitz ? reverse-engineered prompt

Build me a mobile friendly web app for learning to code that feels fun and easy to come back to every day.

I want users to sign up, answer a few onboarding questions, and then get a personalized learning roadmap with coding challenges based on their strengths and weak spots. Include daily questions, streaks, progress tracking, and a stats page that shows how they are improving over time. Add a simple leaderboard so people can compete with others each month, and make the whole thing feel game like so it is more engaging than a normal study site.

Use a clean modern design, keep it fast and responsive, and make sure the main experience works well on phones too. If you need to, look up current docs online for any libraries or best practices. Please build it in a way that is easy to expand later with things like more game modes, social features, and better analytics.