.overlay-loader
{
    position: fixed;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
    z-index: 9999;
    background-color: white;
}

.loader
{
    display: flex;
    justify-content: center;
    height: 100%;
}

.loader img
{
    margin: auto;
    width: 200px;
}