p {
	font-family: Arial, Helvetica, sans-serif ;
	font-size: medium;
	color: black ;
	line-height: 150%
	} 
.diagram {
	font-family: Arial, Helvetica, sans-serif ;
	font-size: small;
	color: black ;
}
h1 {
	font-family: Arial, Helvetica, sans-serif ;
	font-size: large ;
	color: black;
	text-align: center ;
	
}
#main {
background-color:#ffffcc;
}