#main_nav {
	width: 100%;
	padding: 4px 0 4px 0;
	text-align: center;
	background-color: black;
	min-height: 14px;
	position: relative;
}

#main_nav a {
	margin: 4px 20px 4px 0;
	color: white;
	font-weight: bold;
	font-size: 1.05em;
}

#main_nav a:hover { 
	border-bottom: 1px dotted white;
}