body {
	margin: 0; 
	background-color: #f8f8f8;
}

.hpa {
	border: 1px solid #b4b4b4;
	background-color: white;
	margin-top: 20px;
	margin-bottom: 20px;

	left: 0;
	right: 0;
	margin-left: auto;
	margin-right: auto;
	z-index: 0;
}

.hpa:first-of-type {
	margin-top: 0;
}

.hpa:last-of-type {
	margin-bottom: 0;
}