body {
 background: url(http://www.schauspielunterricht-in-hamburg.de/media/bg_images/bg_links.jpg) no-repeat fixed;
 -webkit-background-size: cover;
 -moz-background-size: cover;
 -o-background-size: cover;
 background-size: cover;
 background-color: #333;
}

h3 {
 font-size: 17px;
 margin: 0px 0px 30px 0px;
 color: #333;
}

/* Seiten-Navigation */
#navigation ul li a {
  letter-spacing: 62px;
  display: block;  
}
#navigation ul li ul li a {
  letter-spacing: 1px;
}
/* Ende Seiten-Navigation */
#content {
 opacity: 0.8;
}