Skincare is deeply personal, but the advice we get is often generic. For the Perfect Corp × Startup World Cup Hackathon , I wanted to build something that felt like a bridge between a luxury spa and a clinical dermatology office. Enter Skin Lab Rx : An AI-powered diagnostic platform that turns a simple selfie into a 14-metric clinical report and a personalized skincare routine. The Vision The goal was simple: Zero friction, maximum accuracy. I wanted a user to be able to scan their skin and instantly see which products would actually move the needle for their specific concerns—whether that's acne, hydration, or fine lines. The Tech Stack Next.js 16 (App Router) : For a lightning-fast, SEO-optimized SPA foundation. Perfect Corp AI APIs : The powerhouse behind the skin analysis and virtual makeup transfer. Vanilla CSS : I skipped the frameworks to build a custom, ultra-premium glassmorphism dark theme from scratch. FaceDetector API : Leveraging native browser features for real-time user alignment.…