:root{color-scheme:dark}*{margin:0;padding:0;box-sizing:border-box}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.app{min-height:100vh;display:flex;align-items:center;justify-content:center;background:#0f172a;padding:1rem}.card{text-align:center;color:#f8fafc}.title{font-size:clamp(2rem,8vw,4.5rem);font-weight:800;letter-spacing:-.02em}.subtitle{margin-top:.75rem;font-size:clamp(1rem,3.5vw,1.75rem);font-weight:500;color:#cbd5e1}