Ejemplo 3. CSS
	*{
	margin:0;
	padiing:0;
}

body {
background: #f6f5f5;
font-family: Candara;
color: black;
text-align:left;
}

header {
	width: 100%;
	max-width: 100%;
	margin: 20px auto;
	color: black;
}

header nav{
	background: #1ec4dc;
	overflow:hidden;
}

header nav ul{
	list-style: none;
}

header nav ul li {
	float:left;
}

header nav ul li a {
	padding: 10px 20px;
	display:block;
	color: white;
	text-decoration:none;
}

header nav ul li a:hover{
	background:  #8ee1ed;
}