Hello there,
You would probably be able to achieve that by adding this CSS code to Appearance > Customize > Additional CSS from dashboard.
@media only screen and (min-width: 992px) {
.site-branding {
display: none;
}
.top-bar #site-navigation.col-md-8 {
width: 100%;
}
.main-navigation ul.menu {
display: table;
float: none;
margin-left: auto;
margin-right: auto;
}
}
Regards,
Kharis
aThemes Support