* {
	margin:0;
	padding:0;
}
 
body {
	background:#FFFFFA;
}
 
header {
	width:100%;
	position: fixed;
	z-index:100;
}
 
header nav {
	width:100%;
	max-width:10000px;
	margin:0px auto;

	background:#024959;
}
 
.menu_bar {
	display:none;
}
 
header nav ul {
	overflow:hidden;
	list-style:none;
}
 
header nav ul li {
	float:left;
}
 
header nav ul li a {
	color:#fff;
	padding:10px;
	display:block;
	text-decoration:none;
}
 
header nav ul li span {
	margin-right:10px;
}
 
header nav ul li a:hover {
	background:#037E8C;
	color:#fff;
}

header nav ul li a:focus {
	background:#037E8C;
	color:yellow;
}
 
section {
	padding:20px;
}
 
@media screen and (max-width:800px ) {
	header nav {
		width:80%;
		height:1000px;
		left:-100%;
		margin:0;
		position: fixed;
		z-index:100;
	}
 
	header nav ul li {
		display:block;
		float:none;
		border-bottom:1px solid rgba(255,255,255, .3);
	}
 
	.menu_bar {
		display:block;
		width:100%;
		background:#ccc;
	}
 
	.menu_bar .bt-menu {
		display:block;
		padding:10px;
		background:#024959;
		color:#fff;
		text-decoration:none;
		font-weight: bold;
		font-size:25px;
		-webkit-box-sizing:border-box;
		-moz-box-sizing:border-box;
		box-sizing:border-box;

	}
 
	.menu_bar span {
		float:right;
		font-size:40px;
	}
}