#loader {
    border: 12px solid #f3f3f3;
    border-radius: 50%;
    border-top: 12px solid #444444;
    width: 70px;
    height: 70px;
    animation: spin 1s linear infinite;
    z-index: 99999;
}

#loaderbg{
    position:fixed;
    width: 100%;
    height: 100%;
    z-index:9998;
    background-color: grey;
    opacity: 0.5;
}

.center {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}