#main    { text-align: center; margin-right: auto; margin-left: auto; border: solid 1px black; width: 640px; height: 480px }
#main p { text-align: left }
.proof { display:block;position: absolute; top: 0px; left: 0px }
.center  { text-align: center }
a {
	background-color: transparent;
	color: #2B7A4D;
	font-weight: bold;
	text-decoration: none;
}
a:hover {
	background-color: transparent;
	color: black;
	text-decoration: underline;
}