/* Navigation */

nav {
	margin-top: 1em;
}

nav > ul {
	list-style: none;
	display: flex;
	flex-direction: column;
	margin: 0;
	padding: 0;
}

nav li {
	font-size: 1.5rem;
	list-style: none;
	width: 15em;
	margin: 0.5em;
	padding: 0;
}

nav li li {
	margin-left: -2em;
}

nav a {
	font-weight: bold;
    text-decoration: none;
    display: block;
    padding: 0.4em;
	color: #00519d;
	background-color: #b1d3ee;
	border: thin solid;
	border-radius: .3em;
}    

nav a:focus,
nav a:hover,
nav a:active {
	color: white;
	background-color: #00519d;
}

[aria-current=page] {
	background: #00519d;
	color: white;
}

.menue-button {
    display: none;
}    

/* submenu navigation links */
nav .submenu { 
  visibility: hidden;  
  height: 0;
  overflow: hidden;
  z-index: 1000; 
}
nav .submenu li { 
  display: block; 
  width: 10em;
}
 
/* Show the submenu on focus */
nav li:hover  .submenu, 
nav li:active  .submenu, 
nav li:focus  .submenu { 
  visibility: visible;
  position: absolute;
  height: auto;
}

@media (min-width: 50em) {
	nav > ul {
		flex-direction: row;
	}
	nav li{
		font-size: 1rem;
		flex: 1;
	}
}

/* CSS erweitern um MENÜ-Button und entsprechende Steuerung */
/*	Menü-Button einblenden bei kleiner als 50em */
@media only screen and (max-width:50em) {
	nav	{
		display: none;
		width: 100%;
		margin-top: 2.5em;
		float: left;
	}
	nav .submenu { 
	visibility: visible;
	height: auto;
	margin-left: 1em;
	}
	.menue-button {
		text-decoration: none;
		position: absolute;
		display: block;
		padding: 0.4em;
		top: 10em;
		left: 0;
		color: #00519d;
		background-color: #b1d3ee;
		cursor: pointer;
	}	
	.menue-button:hover {
	color: #00519d;
	background-color: #b1d3ee;
	}
}

/* die Magie, um die Steuerung einzublenden (auch auf mobile Devices) */
#nav-menue:target #menu {
    display: block;
}

/* ausblenden des Menü-Buttons zum öffnen - somit wird der zum Schließen sichtbar */
#nav-menue:target .auf {
    display: none ; 
}