.mainmenu{
	list-style: none;
	margin: 0 auto;
	padding: 0 10px;
	background: black;
	border-radius: 5px;
}
.mainmenu:after{
	content: '';
	display: block;
	clear: both;
}
.mainmenu > li{
	float: left;
}
.mainmenu > li > a{
	color: #fff;
	display: block;
	padding: 10px;
	text-decoration: none;
	transition: background-color 1s;
}
.mainmenu > li > a:hover{
	background-color: #099;
}