Header menu and transparent text background

Hey guys,
I love Sydney but I ran in some issues.
on www.peesee.nl the header menu button thingies way too high in the header


Below is the CSS code to make the menu downward:

nav#mainnav {
    margin-top: 30px;

you can put the code in above using Custom CSS plugin and feel free to adjust the value of margin-top

And do you know also how to remove the page titles on the top of the page

If its for the front page, then you can go to: Edit page > Page attribute > template > and choose “Front page”