Hi,
The header area isn’t designed fora full-width banner by default.
You would need to edit header.php yourself and adjust the classes for the logo and navigation wrappers:
1) LOGO
Line 304, change this:
<div id="logo" class="span3 clearfix">
to this:
<div id="logo" class="span12 clearfix">
2) MENU
Line 312, change this:
<div id="nav-section" class="<?php echo $nav_class; ?> span9 clearfix">
to this:
<div id="nav-section" class="<?php echo $nav_class; ?> span12 clearfix">
That will make both the logo and the navigation container full width.
Unfortunately, since the theme isn’t designed for this purpose, you will need to re-do this each time after updating it.
Regards,
————————————————————————————————————
Cosmin – Support