body{margin:0}.app{text-align:center;color:#0f172a;background:#f8fafc;flex-direction:column;justify-content:center;align-items:center;gap:1.5rem;min-height:100vh;padding:2rem;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;display:flex}header h1{margin:0;font-size:2.5rem;font-weight:700}header p{color:#475569;margin:.5rem 0 0}.counter{color:#fff;cursor:pointer;background:#2563eb;border:none;border-radius:.5rem;padding:.75rem 1.25rem;font-size:1.1rem;transition:background .2s}.counter:hover{background:#1d4ed8}footer a{color:#2563eb;text-decoration:none}footer a:hover{text-decoration:underline}