.instagram-photo > div{
	float:left;
	width:100%;
	padding:1px;
}
.instagram-photo > div:after{
	content:'';
	position:relative;
	padding-bottom:100%;
}

@media(min-width:768px){

	.instagram-photo > div{
		float:left;
		width:33.33333%;
		padding:1px;
	}
	.instagram-photo > div:after{
		content:'';
		position:relative;
		padding-bottom:33.3333%;
	}

}


@media(min-width:1200px){

	.instagram-photo > div{
		float:left;
		width:25%;
		padding:1px;
	}
	.instagram-photo > div:after{
		content:'';
		position:relative;
		padding-bottom:25%;
	}

}