Thank you, it did the trick.

If anyone needs it here is the full CSS used:

#header_main .container { width: 100%; }
.bottom_nav_header.social_header #header_main .container {
height: 160px; }
div .logo { left: 10%; }

Adjust height depending on your logo size and play with div .logo { left: 10%; } until you find the right % to center it