body{font-family:Arial,sans-serif;margin:0;padding:20px;background:#f6f6f6}.container{max-width:900px;margin:auto;background:#fff;padding:30px;border-radius:10px}input{padding:8px;margin:5px}button{padding:10px;margin-top:10px;background:#2e7d32;color:#fff;border:none;border-radius:5px}