For some reason your responsive.css file wasn’t included.
We changed this code in functions.php :
if(isset($vozx_options['disable_responsiveness']) && $vozx_options['disable_responsiveness'] != '0'){
wp_enqueue_style('responsive_css', TEMPPATH.'/css/responsive.css', array('main_css'));
}
to this one:
wp_enqueue_style('responsive_css', TEMPPATH.'/css/responsive.css', array('main_css'));
and now you have responsivnes.
Regards