header, footer, section, nav, article {  
    display: block;  
}

/* SET SOME properties for the BODY
margin auto gets you a centred web page*/
BODY {
	margin: 0 auto;  
	width: 940px; 
	font-family: Arial, Helvetica, sans-serif;
	font-size: 13px;
}

H1 {

	color: red;
}

H2 {
	text-align: center;
	color: blue;
}



HEADER#Banner {
	width: 940px;
	height: 100px;
	margin: 5px auto;
	border: 1px solid #000000;
	text-align: center;
	background-color: blue;

}

FOOTER {
	width: 940px;
	height: 40px;
	margin: 5px auto;
	border: 1px solid #000000;
	text-align: center;
	background-color: yellow;
}

NAV {
	width: 940px;
	height: 50px;
	float: left;
	font-family: Geneva,Arial;
	border: 1px solid #000000;
	background-color: #D0DBF0;
}

NAV ul {
	margin: 0px auto;
	padding: 15px;
	list-style-type: none;
}
NAV li {
	display: inline;

}

NAV li a {
	float: left;
	text-align: center;
	border-right: 2px solid #00DBF0;
        width: 100px;  
        font-size: 14px; 
	padding: 0px 10px;
	color: #0000FF;
	text-decoration: none;
}

NAV li a:hover {
	color: #00DBF0;
}

SECTION#Wrapper {
	margin-top: 100px; 
	margin-left: 20px;
	margin-right: 20px;
	margin-bottom: 50px;
}

ARTICLE#Article_1 {
	width: 900px;
	height: 500px;
	background-color: #ADAAAA;
}

HEADER#Header_Article_1 {
	width: 900px;
	height: 60px;
	background-color: #DCDCDC;
}

SECTION#Section_Article_1 {
	width: 850px;
	height: 400px;
	margin-top: 20px; 
	margin-left: 20px;
	margin-right: 20px;
	margin-bottom: 20px;
	background-color: #F8EBEB;
}