body.login {
    background: url('../Images/start.jpg') no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

.login-card-img {
    display: block;
    margin-left: auto;
    margin-right: auto;
}