body{font-family:Arial;max-width:1000px;margin:auto;padding:40px;color:#222}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}.card{padding:30px;border:1px solid #ddd;border-radius:18px;text-decoration:none;color:#222}input,button{padding:10px}.result{font-size:25px;margin:20px}