Yes, can be done.
But there are some elements on that part of the page that are entangeled and must be taken into consideration when you change something.
What happen to your header and bigger image when your social media tags, that can grow to your left as you add more links?
What will happen to header and bigger image when your search field expands?
So bottom line: yes, you can remove the upper and left margin by adding this to your css declaration:
#site-title {
margin:0;
line-height:0;
}
You want to remove the lower margin aswell? Than you have to adjust the search field up and forget about any social media tags (to my knowledge). You’re ready for that let me know 🙂
Cheers,
Alexander @ http://www.mouseclick.com