body {
	background-color: #ECF0F1;
	font-family: Bitter, "Times New Roman", serif;
}

/* --- Navigation --- */
header {
	background-color: #3498DB;
	border-bottom: 2px solid #2C3E50;
	width: 85%;
	margin: 0 auto;
	border-bottom-left-radius: 25px;
	border-bottom-right-radius: 25px;
	position: sticky;
	top: 0;
}

ul {
	overflow: hidden;
}

nav li {
	list-style-type: none;
	float: left;
	border-right: 1px solid #99ccff;
	transition: background-color 0.5s;
}

nav li:first-child {
	margin-left: 63px;
	border-left: 1px solid #99ccff;
}

nav li.active {
  	background-color: #2C3E50;
}

nav li:hover {
  	background-color: #2980B9;
}

nav li.active:hover {
	background-color: #2C3E50;
}

nav li a {
	display: block;
	padding: 20px 30px;
	color: #ECF0F1;
	text-decoration: none;
}

nav ul:after {
  	content: "";
  	display: table;
  	clear: both;
}

#float-right {
	float: right;
	margin-right: 63px;
	border-left: 1px solid #99ccff;
}

/* --- Main content --- */
main {
	width: 75%;
	margin: 20px auto;
}

h1 {
	font-size: 36px;
	font-weight: bold;
	margin-bottom: 20px;
	margin-left: 20px;
}

h2 {
	font-size: 24px;
	margin-bottom: 10px;
	border-bottom: 2px solid DarkRed;
}

section {
	background-color: #E0E0E0;
	padding: 20px;
	margin-bottom: 30px;
	border-radius: 5px;
	box-shadow: 5px 5px 15px grey;
	overflow: hidden;
}

section img {
	width: 200px;
	height: 200px;
	float: right;
	border: 5px solid #ECF0F1;
	border-radius: 5px;
	box-shadow: 5px 5px 5px grey;
	margin-left: 20px;
}

section p {
	margin-bottom: 30px;
	font-family: "Source Sans Pro", Arial, sans-serif;
	line-height: 130%;
}

/* --- Footer --- */
footer {
	clear: both;
	background-color: #2C3E50;
}

footer p {
	color: #ECF0F1;
	padding: 20px;
	text-align: center;
}

#popup {
	width: 200px;
	height: 200px;
	opacity: 0.1;
	z-index: 5;
	position: fixed;
	bottom: -150px;
	right: 0;
	transition: bottom 1.5s, opacity 1.5s;
}

#popup:hover {
	position: fixed;
	bottom: -50px;
	opacity: 1;
}