body  
{
    background-image: url("autobahn_nacht_stadt.jpg");
    background-color: #000000;
    background-repeat: no-repeat;
    background-size: 100%;
}
h1 {
			font-size: 3.0vw;
			color: red;
			display:inline;
	}
		
h2 {
			font-size: 4.0vw;
			font-family:Helvetica,Verdana,Sans-serif;
			font-weight:bold;
			color:#FFFFFF;
	}
h3 {
			font-size: 1.8vw;
			font-family:Helvetica,Verdana,Sans-serif;
			color:#FFFFFF;
	}

h4 {
			font-size: 3.0vw;
			color: red;
			display:inline;
	}

	
p {
			font-size: 2.5vw;
		}		
		
img 
		{
		  width: 50%; 
  		  height: 100%;
		}		
		
body {margin: 0;}

ul.sidenav {
    list-style-type: none;
    margin-top: 150px;
    margin: 5;
    padding: 0;
    width: 10%;
   
    background-color: #f1f1f1; 
    position: fixed;
    height: 100%;
    overflow: auto;
}

ul.sidenav li a {
    display: block;
    color: #000;
    padding: 8px 16px;
    text-decoration: none;
}
 
ul.sidenav li a.active {
	background-color: #FF0000;;  
  /*  background-color: #4CAF50; */
    color: white;
}

ul.sidenav li a:hover:not(.active) {
    background-color: #555;
    color: white;
}

div.content {
    margin-left: 25%;
    padding: 1px 16px;
    height: 1000px;
}

@media screen and (max-width: 900px) {
    ul.sidenav {
        width: 100%;
        height: auto;
        position: relative;
    }
    ul.sidenav li a {
        float: left;
        padding: 25px;
    }
    div.content {margin-left: 0;}
}

@media screen and (max-width: 400px) {
    ul.sidenav li a {
        text-align: center;
        float: none;
    }
}		

a:link { color:#FF0000; font-weight:bold;text-decoration:none;}
a:visited { color:#CC340A; font-weight:bold;text-decoration:none;}
a:active { color:#FFCC00; font-style:italic; font-weight:bold;text-decoration:none;}
a:hover { color:#FF9900; font-weight:bold;text-decoration:none;}