.loader{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    justify-content: center;
    align-items: center;
    background-color: #000;
    color: #fff;
    display: inline-flex;
    font-size: 20pt;
}
.mb-0{
    margin-bottom: 0 !important;
}
.btn-block{
    width: 100%  !important;
}
@media (max-width: 1000px) {
    .loader{
        font-size: 12pt;
    }
}