* {
  padding: 0;
  margin: 0;
}

body  {
  font: 100% Verdana, Arial, Helvetica, sans-serif;
  text-align: center;
  background-color: gray;
  margin-top: 10px;
}

#mother {
  width: 780px;
  text-align: left;
  background-color: white;
  margin: 0 auto;
  border: 5px solid white;
}

#header {
  height: 100px;
  background-color: #3399FF;
}

#menu {
  float: left; /* schwebt links */
  width: 200px;
height: 700px;
  background-color: #ffff99;
  padding: 20px 5px;
}

#main {
  background-color: white;
  padding: 20px 10px;
  margin: 0 0 0 170px;
}

#footer {
  clear: both;
  height: 40px;
  padding: 5px;
  background-color: silver;
}