#cgs-loader {
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    z-index:65535;
}
#cgs-loader-back {
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background-color: #fff;
    opacity: 0.5;
}
#cgs-loader-front {
    position: fixed;
    top: 50%;
    left: 50%;
    border: 15px solid #f3f3f3;
    border-radius: 50%;
    border-top: 15px solid #3498db;
    width: 150px;
    height: 150px;
    margin-top: -75px;
    margin-left: -75px;
    animation: cgs-loader-keys 2s ease-in-out infinite;
}
@keyframes cgs-loader-keys {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}