.card-logo-auth {
    background: url("../img/bg.jpeg") no-repeat center center; 
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    padding: 50px;
}

.card-logo-auth .slogan-logo {
    color: white;
    font-size: 20px;
}