Margin sub-menu goes big while having menu bottom algined to header

Hi there,

I have Vantage Premium I’m using on my site: arkodesign.nl

I’m using:
.main-navigation ul li a {
margin-top: 70px;
}

for my site to get the menu to align to the bottom of my header. But now my drop-down menu on the language switcher gets really big. I tried setting this part of the menu to margin -70px, but then parts become un-clickable…

Any sollution sfor this?

Thanx!

Arko