Permite alinhamento Vertical

vertical-align.css

/* Div centralizada */
.classe {
	position: relative;
	top: 50%;
	-webkit-transform: translateY(-50%);
	-ms-transform: translateY(-50%);
	transform: translateY(-50%);
}


/* Imagem centralizada */
.img-center{
	background: #FFF;
	width: 100%;
	padding-top: 75%;
	padding-top: calc(75% - 20px); /* fix border-width */
	text-align: center;
	margin: 0;
	position: relative;
}
.img-center img{
	max-height: 100%;  
	max-width: 100%; 
	width: auto;
	height: auto;
	position: absolute;
	top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	margin: auto;
}