*{box-sizing:border-box}body{color:#0d1b2f;background:#f3f9ff;justify-content:center;align-items:center;min-height:100vh;margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;display:flex}.welcome{text-align:center;padding:2rem}.welcome h1{font-size:clamp(1.5rem,4vw,2.5rem);font-weight:600}