body {
    margin: 0;
    padding: 0;
}
li {
	font-family: Arial, Verdana, Helvetica, sans-serif;
	font-style: italic;
	font-size: 15px;
}
p {
	font-family: Arial, Verdana, Helvetica, sans-serif;
	font-style: italic;
	font-size: 15px;
	text-align: justify;
	text-indent: 15px;
	margin: 0 10px;
}
h2 {
	font-family: Arial, Verdana, Helvetica, sans-serif;
	font-style: italic;
	font-size: 17px;
	color: green;
	text-indent: 30px;
}
h1 {
	font-family: Arial, Verdana, Helvetica, sans-serif;
	font-style: italic;
	font-size: 50px;
	font-weight: bold;
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	color: white;
	text-align: center;
}
a {
	font-family: Arial, Verdana, Helvetica, sans-serif;
	font-style: italic;
	font-size: 15px;
}
.vir {
	font-family: Arial, Verdana, Helvetica, sans-serif;
	font-style: italic;
	font-size: 15px;
	text-align: justify;
	color: silver;
}
section a:link, 
footer a:link { 
   color: blue;
   text-decoration: none;
   font-style: italic;
}
section a:visited, 
footer a:visited {
   color: green;
   text-decoration: none;
   font-style: italic;
}
section a:hover, 
footer a:hover {
   color: blue;
   text-decoration: underline;
   font-style: normal;
}
section a:active, 
footer a:active {
   color: green;
   text-decoration: underline;
   font-style: normal;
}
img {
	max-width: 300px;
	height: auto;
	margin: 0 10px;
}
header {
	position: relative;
	height: 340px;
	background-image: url("header_image.jpg");
	background-size: cover;
    background-position: center;   
	background-repeat: no-repeat;
}
nav a {
	background-color: green;
	text-align: center;
	padding: 15px 30px;
	display: block;
	text-decoration: none;
}
nav {
	display: flex;
	justify-content: center;
	background-color: black;
}
nav a:hover {
    background-color: darkgreen;
	text-decoration: none;
}
nav a:visited,
nav a:active,
nav a:link {
	text-decoration: none;
	color: white;
	font-size: 20px;
	margin: 0 10px;
}
footer {
	margin: 0 10px;
}