header {
  top: 0;
  left: 0; 
  right: 15em;
}
footer {
  position: fixed;
  padding: 10px;
  bottom: 0;
  left: 0;
  right: 0;
}
 

body {
    padding-right: 15em;
    padding-left: 3em;
    padding-top: 0em;
    padding-bottom: 10em;
    overflow:auto;
    font-family: Georgia, "Times New Roman",
          Times, serif;
    color: black;
    background-color: rgb(190,206,223);

    /* background-image: url('https://www.uni-muenster.de/IVV5WS/WebHop/user/nikolaus/Files/Ording.jpg'); */
    background-attachment: fixed;
    background-position: right bottom;
    background-repeat: no-repeat;
    background-size: 100% auto;
}

h1 {
   text-shadow: 0px 0px 5px rgba(255,255,255,1.0), 0px 0px 10px rgba(255,255,255,0.7), 0px 0px 10px rgba(255,255,255,0.5), 0px 0px 10px rgba(255,255,255,0.3);
   color: rgba(255,255,255,0);
   font: 60px 'ChunkFiveRegular';
   text-align: right;
}
html {
    height: 100%
   } 
 
ul.navbar {
    list-style-type: none;
    padding: 0;
    margin: 0;
    top: 2em;
    right: 3em;
    width: 10em; 
    position:fixed;
}

 ul.navbar li {
    background: rgb(255,255,255) ;
    margin: 0.5em 0;
    padding: 0.3em;
    text-align: center;
  }
 ul.navbar li.active {
    background: Grey ;
  }
ul.navbar li:hover{ 
     background: grey}

ul.navbar li:first-child  {
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
}
 ul.navbar li:last-child  {
  border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;
}
ul.navbar a {
    text-decoration: none }
a:hover{ 
     background: grey}
a:link {
    color: blue ;
   text-decoration: none;
}
a:visited {
   text-decoration: none;
    color: magenta;
}


summary {
 margin: 0.2em;

 border-color: rgba(255,255,255,0.3);
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;

}  
summary:hover{ 
     background: grey}