*,:before,:after{box-sizing:border-box}body{color:#111827;background:#f9fafb;margin:0;font-family:Inter,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.app{flex-direction:column;justify-content:center;align-items:center;gap:.75rem;min-height:100vh;padding:1.5rem;display:flex}.app__title{margin:0;font-size:2rem}.app__subtitle{color:#4b5563;margin:0}