Try this CSS:
@media(min-width: 769px) {
.main-navigation .inside-navigation .main-nav>ul li a {
line-height: 1em;
padding-top: 50px;
padding-bottom: 12px;
}
}
So what its doing – the line-height of your menu items is set to 80px.
This CSS overwrites that height, first our new line-height 1em which is 18px ( the menu font size ), and then we just top and bottom padding to make up the difference in height ie. 18px + 50px + 12px = 80px.
Adjust the top and bottom padding to adjust the menu text vertical position.