html { 
	background: url(back.jpg) no-repeat center center fixed; 
	-webkit-background-size: cover;
	-moz-background-size: cover;
	-o-background-size: cover;
	background-size: cover;
	min-height: 100%;
}
.container {margin-top: 20%;}
.card-title {font-size: 36px !important;}