.loaderContainer {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999999999;
    height: 100%;
    width: 100%;
    background: black;
    opacity: 0.4;
}

.loader {
    /*border: 16px solid #f3f3f3;*/
    border: 16px solid #f3f3f3;
    margin: 0px auto;
    position: absolute;
    top: 35%;
    left: 45%;
    border-radius: 50%;
    /*border-top: 16px solid #3498db;*/
    /*width: 120px;
    height: 120px;*/
    border-top: 16px solid #454545;
    width: 90px;
    height: 90px;
    -webkit-animation: spinExcel 2s linear infinite;
    animation: spinExcel 2s linear infinite;
}

/* Safari */
@-webkit-keyframes spinExcel {
    0%

{
    -webkit-transform: rotate(0deg);
}

100% {
    -webkit-transform: rotate(360deg);
}

}

@keyframes spinExcel {
    0% {
        transform: rotate(0deg);
    }

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