.nav {
  position: fixed;
  width: 140px; 
  */
  z-index: 1; 
  top: 0; 
  left: 0;
  overflow-x: hidden; 
  padding-top: 20px;
  background-color: #ffffff
}

.nav a {
  padding: 6px 8px 6px 16px;
  text-decoration: none;
  font-size: 20px;
  color: #000000;
  display: block;
  
}

.nav a:hover {
  color: #38138e;
}

.main {
  margin-left: 170px; 
  padding: 0px 10px;
  width: 800px;
}


@media screen and (max-height: 450px) {
  .sidenav {padding-top: 15px;}
  .sidenav a {font-size: 18px;}
}

#banner {

    background:url('http://i64.tinypic.com/2myafex.jpg');
    width:1000px;
    min-height:200px;
}

ul {
  list-style-type: none;
}