Sub-Menu typography

I wish this is added in GP core some day but for now you can use some trusty CSS:

.main-navigation .main-nav ul ul li a {
	font-size: 13px;
	font-weight: normal;
    text-transform: capitalize;
}

@media (min-width: 1025px) {
    .main-navigation .main-nav ul ul {
	padding: 0.6em;
	}
}

In the example above, I have adjusted the sub-menu font size, weight and transform. I’ve also added a slight padding around the container on desktop sizes.