.container{
	
}

.menu {
  width: 280px;
  top: 184px;
  bottom: 0px;
  float: left;
  padding: 8px;
display: block;
}


.main {
  margin-left: 300px;
  top: 184px;
  bottom: 0px;
  padding: 8px;
}



li.unstyled {
  list-style-type: none;
}

#ol.toc {
    counter-reset: item;
    list-style-type: decimal;
}

#ol.toc li:before {
    content: 'Chapter' counter(item, decimal) '. ';
    counter-increment: item;
}

/* Responsive navigation menu (for mobile devices) */
@media screen and (max-width: 800px) {
  .menu {
  width: 280px;

  top: 184px;
  bottom: 0px;
  float: left;
  
  
  display: none;
visibility: hidden;
}


.main {
margin-left: 0px;
top: 184px;
  bottom: 0px;
}

#contents {
  top: 40px;
  width:100%;
  max-width: 400px; 
  right:0;}

.topnav {
  display:table-cell;
  vertical-align:middle;
}  
  
.topnav a {
    width: 100%;
    margin: auto;   
    text-align: center;
	padding-bottom: 10px;
}

.topnav a:hover {
  color: blue;
}

.topnav a.active {
  color: blue;
}

.topnav-centered{
  width: 100%;
    margin: auto;   
    text-align: center;
	padding-bottom: 15px;
}

.topnav-right {
	padding-top: 35px;
  width: 100%;
    margin: auto;   
    text-align: center;
}  
}