.main_nav {
	margin: 0;
	padding: 0;
	list-style: none;
}

.main_nav li {
	background: #f1f1f1;
	border-left: 10px solid #a1a1a1;
	border-right: 10px solid #e1e1e1;
	padding: 10px;
	width: 130px;
}

.main_nav li:hover {
	background: #c1c1c1;
	border-left: 10px solid black;
	border-right: 10px solid black;
}

.main_nav li a {
	color: #000;
	font-family: 'Arial';
	font-size: 16px;
	text-decoration: none;
}