@media only screen and (min-width:320px) and (max-width:500px){
	.gallery_item{
		width: 50%;
	}
}

@media only screen and (min-width:500px) and (max-width:640px){
	.gallery_item{
		width: 50%;
	}
}

@media only screen and (min-width:640px) and (max-width:767px){
	.gallery_item{
		width: 50%;
	}
}

@media only screen and (min-width:768px) and (max-width:991px){
	.gallery_item{
		width: 50%;
	}
}


@media only screen and (min-width:991px) and (max-width:1199px){
	.gallery_item{
		width: 33.33%;
	}
}