.tab_navigation {

    width: 620px !important;
    margin: 0px 0px 0px -300px !important;}
/*--------------------------------------------------------------------- start mobile styles --------------------------------------------------------------------*/

@media only screen and (max-device-width : 767px) and (max-width : 767px)  

{
.tab_navigation {
    width: 100% !important;
    margin: 87px 0px 0px 0px !important;
  
}	
	
}