isicmexico
Hi
First you need to enable override css options from the template style settings.
Now open template folder css/override.css file and add this code
@media (max-width: 840px) {
#gkHeaderMod img {
width: 100% !important;
height: auto !important;
}#gkHeaderMod {min-height:100%!important;}
}
it will work fine.