.main_nav
{
	margin-top: 10px;
	text-align:center;
}

.main_nav a
{
	text-align: center;
	text-transform: inherit;
	font-family: Helvetica, Arial, sans-serif;
	font-size: large;
	font-decoration: none;
	text-decoration: none;
}
.main_nav a:hover
{
	text-align: center;
	text-transform: inherit;
	font-family: Helvetica, Arial, sans-serif;
	font-size: large;
	font-weight: bold;
	text-decoration: none;
}