.main-logo{
    text-align: center;
    margin-bottom: 50px;
}
@media (max-width: 767px) {
    .main-logo img{
        max-width: 260px;
    }
}
@media (min-width: 992px) {
    .main-logo{
        position: absolute;
        right: 0;
        top: 0;
    }
}
.site-login{
    position: relative;
}