$screen-md-min: 768px
$screen-md-max: 960px
$middle_min-max: "(min-width:" $screen-md-min + ") and (max-width:" + $screen-md-max + ")"
@media #{$middle_min-max}
color: red$('.my-gallery').click(function(){
$('header').slideUp("slow");
});
// Gallery starts closing
pswp.listen('close', function() {
$('header').slideDown("slow");
});