body {
	margin: 0em;
	background: black;
	color: white;
	font-family: sans-serif;
}

nav {
	padding: 2em 1em;
}

header {
	display: block;
	font-size: 3em;
	padding: 1em 1em;
	background-image: url("images/photography/2016_fenster1.jpg");
	background-repeat: no-repeat;
	background-size: cover;
	background-position: center;
    letter-spacing: 1em;
    text-align: center;
}

main {
	margin: 1em;
}

section {
	display: flex;
	flex-wrap: wrap;
}

article {
	padding: 2em;
	font-family: monospace;
}

.a_extern:link {
	color: white;
	font-family: monospace;

}
.a_extern:hover {
	color: lightblue;
	font-family: monospace;

}
.a_extern:visited {
	color: lightgrey;
	font-family: monospace;

}
.a_intern{
	font-size: 2em;
	margin-left: 0.2em;
	border-bottom: 0.2em solid white;
	padding: 0.2em;
	color: white;
	text-decoration: none;
}
.gridPictures {
	display: flex;
	flex-wrap: wrap;
}

.column {
  flex: 32%;
  max-width: 32%;
  padding: 0 0.5em;
}

.photo {
	margin-top: 1em;
	vertical-align: middle;
	width: 100%;;
}