@media (min-width: 576px) and (max-width: 767.98px) {
    .qrcode {
        width: 210px;
        height: 210px;
    }
}

@media (min-width: 768px) and (max-width: 991.98px) {
    .qrcode {
        width: 150px;
        height: 150px;
    }
}

@media (min-width: 992px) and (max-width: 1199.98px) {
    .qrcode {
        width: 210px;
        height: 210px;
    }
}

@media (min-width: 1200px) {
    .qrcode {
        width: 210px;
        height: 210px;
    }
}