.content{
	clear: both; 
	margin: 0 auto; 
	width: 80%;
	margin-top: 150px;
	position: relative;
	z-index: -2;
	padding-left: 3%;
}

.image-item{
	width: 29%;
	position: relative;
	padding-right: 3%;
	padding-bottom: 30px;
}

#last{
	margin-bottom: 30px;
}


@media only screen and (min-width : 1650px) and (max-width : 4000px) {
	#content{
		width: 60%;
		margin-top: 200px;
	}
}

@media only screen and (min-width : 501px) and (max-width : 800px) {
	.content{
		padding-left: 0.5%;
		width: 70%;
	}

	.image-item{
		width: 100%;
		padding-right: 0;
		padding-bottom: 30px;
	}
}

@media only screen and (min-width : 150px) and (max-width : 500px) {
	#three{
		margin-top: -3px;
	}

	#one{
		margin-top: -3px;
	}

	.content{
		padding-left: 0.5%;
		width: 70%;
	}

	.image-item{
		width: 100%;
		padding-right: 0;
		padding-bottom: 30px;
	}

	#last{
	margin-bottom: 60px;
	}

}