body {
  background-color: green;
  color: black;
  font-family: helvetica, Verdana;
}

h1{
  margin:0;
  }

#container{
  background-color: white;
  width: 800px;
  margin-left: auto;
  margin-right:auto;
  }

#header {
  background-color: #d7e8bc; 
  color: white;
  text-align: center;
  padding:10px;
}

#content {
  padding: 10px;
  }
 
 #nav a{
  color:red;
  }
 
 #nav ul{
   list-style-type:none;
   padding:0;
   }
  
#nav{
    width: 180px;
    float:left;
    }
    
#nav .selected {
  font-weight: bold;
  }   
    
#main{
  width: 600px;
  float:right;
  }
  
  #footer {
  clear:both;
  padding: 10px;
  color: #d7e8bc;
  text-align: right;
    }