:root{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#111827;background:#fff}*{box-sizing:border-box}body{margin:0}.app{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;padding:1.5rem}.button{border:none;border-radius:.75rem;padding:.75rem 1.25rem;font-size:1rem;background:#2563eb;color:#fff;cursor:pointer}.button:hover{background:#1d4ed8}.message{margin:0;font-size:1rem}