h1,
h2,
h3,
h4 {
	position: relative;
	margin-top: 1.2em;
	font-weight: bold;
	padding-bottom: 15px;
	border-bottom: solid 2px #ccc;
}

h1 {
	margin-bottom: 1.2em;
}

h3 {
	font-size: 1.2em;
	color: #4d4c4c;
}

h4 {
	font-size: 1em;
	color: #4d4c4c;
}

#main-content .container {
	max-width: 900px;
	background-color: #f4f4f4;
	padding: 10px 20px;
}

#references li {
	margin-bottom: 1em;
}

.header-internal {
	background-color: #000;
	color: #fff;
}

.header-internal img {
	filter: invert(1) brightness(20);
}

.title-h1{
	text-align: center;
	padding: 20px 0;
}

.title-h1 h1{
	margin: 0;
	padding: 0;
	border: 0;
}

.footer-internal {
	background-color: #000;
	color: #fff;
}

.footer-internal a {
	color: #fff;
	transition: .3s ease;
	text-decoration: none;
}

.footer-internal a:hover {
	color: blue;
	transition: .3s ease;
}