.loader {
    z-index: 100000000;
    position: absolute;
    left: 50%;
    top: 30%;
    margin-left: -100px;
    border: 24px solid #f3f3f3;
    border-radius: 50%;
    border-top: 24px solid #3498db;
    width: 180px;
    height: 180px;
    -webkit-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
}


@-webkit-keyframes spin {
    0% { -webkit-transform: rotate(0deg); }
    100% { -webkit-transform: rotate(360deg); }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}