@media only screen and (max-width: 500px) {
  div.login-parent {
    width: 100%;
  }

  div.wrap-login100 {
    width: 100%;
    padding:30px;
  }

  div.center_div {
    width: 100%;
    padding:30px;
  }

  .error_msg_send_email,
  .success_msg_send_email {
    width: 100%;
  }

}