*{padding: 0px;
margin: 0px
}
nav{position: relative;
	padding:10px 20px 10px 10px;
	text-align: center;
	z-index: 1;
	background: #333;
	border:10px solid #37f;
	box-shadow:3p 0px 5px grey;  
	margin: 0 auto;
	with:calc(100% - 60px);
}
ul li{
	padding: 30px 40px;
	font-size: 24px;
	
}
ul li:hover {
	display: inline-block;
	list-style-type:none;
  background:#99cc00;
  font-weight:bold;
}