.meu-login{
    background: url('https://i.pinimg.com/originals/9b/5b/af/9b5bafa435403840fe102bab5258abd6.jpg') no-repeat center center fixed !important; 
    -webkit-background-size: cover  !important;
    -moz-background-size: cover  !important;
    -o-background-size: cover  !important;
    background-size: cover  !important;
}