body.login {
  background-image: url(/wp-content/themes/UpMag/images/bg.jpg);
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: center;
}

.login h1 a {
  background-image: url(http://vatrogastvo.hr/wp-content/uploads/2016/07/logo12.png);
  width: 100% !important;
  height: 55px !important;
  background-size: 90% !important;
  background-color: #fff;
  margin: 0 auto !important;
  background-position: center bottom;
}

.login form {
margin-top: 0;
}