@media only screen
and (min-width : 320px) and (max-width : 568px){
/* media queries for 320px */

}
@media only screen
and (min-width : 360px) and (max-width : 640px){
/* media queries for 360px */
 

} 

@media only screen
and (min-width: 768px) and (max-width: 1024px)
and (orientation : portrait)
{
/* media queries for 768px */


}