Hi Chriswieser,
To change the height of the primary menu go to Appearance -> Customize/Theme Options -> Design Options Tab -> Custom CSS paste the following CSS code and Click on save all changes button:
#access a {
height: 45px;
padding-top: 25px;
}
.search-toggle {
margin-top: 25px;
}
#site-logo {
margin-top: 18px;
}
#access ul li ul {
top: 70px;
}
@media only screen and (max-width: 767px) {
#site-logo {
margin: 10px 0;
}
.menu-toggle {
margin-top: 17px;
}
}
Thank you!