.ht_center {text-align: center}
			.header {padding: 1em 1em 1em 2em; border: 12px ridge  #55ABC7; 
			          text-align: center; background: #55ABC7; clear: both}
			.abstract {padding: 1em 1em 1em 2em; border: 12px ridge #55C76B; margin: 1.5em 1.5em 3.5em 1.5em; background: #55C76B; clear: both;}
			.box {float: left; padding: 1em 1em 1em 2em; border: 12px ridge black; margin: 2.5em 1.5em 1.5em 1.5em; background: #55C76B;}
			.footer {padding: 1em 1em 0em 2em; border: 12px ridge #deb887;
			          background: #deb887; clear: both}
			.inset {float: left; padding: 4px 4px 4px 4px; border: 4px ridge black; margin: 8px}