<style>
html {
	background: #ECF0F1;
	margin: 0;
	padding: 0;
}
body {
	font-family: Arial, Helvetica, sans-serif, WinWingDings;
	line-height: 1.5em;
	padding: 0.8em;
	max-width: 30em;
	margin: 1em auto;
	background: #fff;
	border: 4px solid #BDC3C7;
	box-shadow: 0 0 10px #ddd;
}
a {
	color: #2980B9;
	text-decoration: none;
	border-bottom: 1px dotted #2980B9;
}
a:hover, a:active {
	color: #3498DB;
	border-bottom: 1px solid #2980B9;
}
header {
	text-align: center;
	margin-bottom: 1em;
}
.des {
	display: block;
	font-size: 0.8em;
}
.logo {
	font-size: 5em;
	color: #E74C3C;
	display: block;
	margin: 0.5em 0;
}
h1 {
	margin: 0;
	color: #555;
	font-family: Georgia;
	font-weight: normal;
	font-size: 1.2em;
}
h2 {
	font-size: 0.8em;
	color: #aaa;
	font-weight: normal;
	margin: 0;
}
nav ul {
	list-style: none;
	margin: 0;
	padding: 0;
	overflow: hidden;
}
nav li {
	margin: 0 1px 1px 0;
	float: left;
	width: 49.6%;
}
nav li a {
	font-size: 0.9em;
	display: block;
	color: #fff;
	background: #E74C3C;
	text-align: center;
	border: 0 none;
	padding: 0.5em 0;
}
nav li a:hover, nav li a:active {
	border: 0 none;
	background: #C0392B;
	color: #fff;
}
.content {
	margin: 1em 0;
	height: 300px;
}
article {
	margin: 0.5em;
	height: 100%;
	background: #BDC3C7;
}
footer {
	text-align: center;
	color: #34495E;
	font-size: 0.8em;
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #E74C3C;
}

li {
  float: left;
}

li a, .dropbtn {
  display: inline-block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

li a:hover, .dropdown:hover .dropbtn {
  background-color: #2980B9;
}

li.dropdown {
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.dropdown-content a:hover {background-color: #0f0996;}

.dropdown:hover .dropdown-content {
  display: block;
}

@media (min-width: 33em) {
	body {
		padding: 1.6em;
		max-width: 60em;
	}
	header {
		overflow: hidden;
		text-align: left;
	}
	.logo {
		float: left;
	}
	hgroup {
		float: left;
		margin: 1.6em 0 0 1em;
	}
	.des {
		float: right;
		margin-top: 3em;
	}
	h1 {
		font-size: 1.6em;
	}
	nav {
		background: #E74C3C;
	}
	nav ul li {
		width: auto;
		border-right: 1px solid #C0392B;
	}
	nav ul li a {
		font-size: 1em;
		padding: 0.5em 3em;
	}
	.content {
		overflow: hidden;
	}
	article {
		height: 100%;
		width: 23.2%;
		float: left;
	}
	footer {
		border-top: 1px solid #BDC3C7;
		padding-top: 0.5em;
	}
}
@media (min-width: 30em) and (max-width: 60em) {
	body {
		width: 36em;
	}
	.des {
		display: block;
		float: none;
		text-align: center;
		margin-top: 0;
	}
	nav {
		background: transparent;
	}
	nav ul li {
		width: 33%;
		border: 0 none;
	}
	article {
		width: 46%;
	}
}
</style>
