.nav-menus > li:first-child {
    display: none;
    visibility: hidden;
}

#qr-img.table-striped > tbody > tr:nth-of-type(odd) > * {
    background-color: inherit !important;
}

table#qr-img td {
    text-align: center;
}

table#qr-img td img {
    max-width: 100%;
    display: block;
    margin: 0 auto;
}