@media screen and (min-width:480px) {
  
   /*******************************
   Two collumn layout
  *******************************/ 
  
  #primary {
    width:50%;
    float:left;
  }
  
  #secondary {
    width:40%;
    float:right;
    
  }
  



@media screen and (min-width:660px) {
  
   /*******************************
   Header
  *******************************/ 
  
  nav {
    background:none;
    float:right;
    font-size: 1.125em;
    margin-right: 5%;
    text-align: right;
    width: 45%;
  }
  
  #logo {
    float: left;
    margin:0 0 10px 5%;
    text-align:left;
    width:45%;
  }

 

}