@charset "utf-8";

*{
	box-sizing:border-box;
}

header{
	width:800px;
	height:100px;
	background-color:pink;
	margin:0 auto;
}

nav > ul{
	list-style:none;
	padding:0;margin:0;
	overflow:hidden;
}

nav > ul > li{
	float:left;
	margin-right:30px;
}


footer{
	width:800px;
	height:50px;
	background-color:silver;
	margin:0 auto;
}