css

header {
	font-family: helvetica;
	color: white;
	padding: 5px;
	border: medium solid black;
	margin: auto;
	background: #9900FF;
	width: 50%;
	text-align: center;
}
content {
	font-family: helvetica;
	color: gray;
    padding: 5px;
    height: 520px;
    width: 50%;
	text-align: center;
	display: block;
    margin : auto;
}
navigation {
	font-family: helvetica;
	font-size: 18px;
	color: black;
	padding: 15px;
	width: 50%;
	text-align: center;

}
footer {
	font-family: helvetica;
	color: white;
	padding: 15px;
	background: #9900FF;
	border: medium solid black;
	width: 50%;
	text-align: center;
	margin: auto;
}
a {
	color: black;
}
sp  {
	color: red;
}