.header-bar .identity-logo {
    background-image: url("/bundles/memainpage/img/homepage/iteach_dark_logo.svg") !important;
}
.header-bar.sticky .identity-logo {
    background-image: url("/bundles/memainpage/img/homepage/iteach_dark_logo.svg") !important;
}
@media only screen and (min-width: 700px) {
    .header-bar .identity-logo {
        background-image: url("/bundles/memainpage/img/homepage/iteach_logo.svg") !important;
    }
}