#divAppHourGlass
{
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0; 
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5);
    z-index: 19997;
}

#divAppHourGlass .sy-loader
{
    position: absolute;
    top: 50%;
    left: calc(50% - 30px);
    transform: translate(-50%,-50%);
    -ms-transform: translate(-50%,-50%);
    border: 7px solid #f3f3f3;
    border-top: 7px solid #4596ce;
    border-bottom: 7px solid #4596ce;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}

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