.gray-bg{ 
    background: url(../img/basebg.jpg) no-repeat center center fixed; 
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}
.loginscreen {
    padding: 30px;
    border-radius:15px;
    background-color:rgba(255, 255, 255, 0.8);
    position: absolute;
    top: calc(50% - 240px);
    left: calc(50% - 170px);
    
}
#IsoLogo {
    width: 100%;
}