I’ve changed my mobile menu height here:
> Layout > Primary Navigation > Menu Item Height > 90 for desktop / 25 for desktop & phone
Then I cut/pasted this into CSS (it’s the only code there):
@media (max-width: 768px) {
.mobile-header-navigation .site-logo.mobile-header-logo img {
height: 108px;
}
.menu-toggle, .main-navigation .mobile-bar-items a {
line-height: 108px;
}
}
And the mobile logo is still miniscule and tied to the mobile nav height.