*{margin:0; padding:0;}
body{
	background-color:khaki;
	color:blue;
	
}
#main_container{
	margin:20px auto;
	width:760px;
	border:2px solid blue;
	border-radius:5px;
	background-color:black;
}
.header{
	background:#00ff00;
	padding:40px;
	border-bottom:5px solid red;
	font-size:30px;
}
#nav{
	background:#ddd;
	height:40px;
	border-bottom:5px solid #660099;
}
#nav ul{
	list-style-type:none;
}
#nav ul li{
	float:left;
	border-right:1px solid grey;
	
	}
#nav ul li:last-child {
	border-right:none;
}
#nav ul li a{
	text-decoration:none;
	display:block;
	
	padding:10px 20px;
}
#nav ul li a:hover{
	background:green;
	color:yellow;
}

article {
	text-align:justify;
}

.footer {
	text-align:center;
}
label{
	font-size:35px;
	color:red;
}