*{box-sizing:border-box}body{font-family:Arial,sans-serif;background:#f2f2f2;text-align:center;padding-top:100px;margin:0}h2{margin-bottom:16px}form{display:inline-block;background:#fff;padding:20px;border-radius:6px;box-shadow:0 2px 12px #00000014}input{display:block;margin:10px auto;padding:8px;width:220px}button{padding:8px 16px}.error{color:#c00;margin-top:10px}