.h-100vh{
    height: 100vh;
}
.h-75vh{
    height: 75vh;
}
.vl-1{
    width: 0px;
    padding: 0 1px 0 0;
    margin: 0 -1px 0 0;
}
.h-100vh-h{
    height: calc(100vh - 57.6px);
}
.sq-qr{
    width: 500px;
}
@media (min-width: 576px){
    .mtt100{
        margin-top: -100px;
    }
}