3 things I need to do it with GP theme

a)

.main-navigation .navigation-logo {
    float: right;
}

b) Replace this CSS you've added:

.site-header {
    display: none;
}

with:

@media (min-width: 769px) {
    .site-header {
        display: none;
    }
}

Then upload the logo again in Customizer > Site Identity.

Thanks Leo. I'll try and if there is new things I'll open a new topic.

No problem!