body {
	background: #d3e1fe;
}

#wrapper {
	width: 1010px;
	margin: auto;
	font-family: sans-serif;
}

header {
	height: 100px;
	color: #ffffff;
	background: #4080ff;
}

nav {
  display: block;
  margin-bottom: 10px;
}
nav ul {
  list-style: none;
}
nav ul li {
  display: inline;
}
nav ul li a {
  display: block;
  float: right;
  padding: 0px 15px;
  color: #000080;
  text-decoration: none;
  font-weight: bold;
}
nav ul li a:hover {
  background: #0a85ff;
  color: #ffffff;
  padding: 0px 15px;
  margin: 0;
  text-decoration: none;
}

div#core {
  display: block;
  clear: both;
  margin-bottom: 20px;
  background-image: url(../images/GluonFromRadioTower.png);
}

footer {
  background: #4080ff;
  color: #000080;
}

/* clearfix */
.clearfix:after {
  content: ".";
  display: block;
  clear: both;
  visibility: hidden;
  line-height: 0;
  height: 0;
}
.clearfix {
  display: inline-block;
}
html[xmlns] .clearfix {
  display: block;
}
* html .clearfix {
  height: 1%;
}

div#left {
  width: 150px;
  height: 600px;
  float: left;
  padding: 0px 15px;
  margin: 0 0px;
  background: #4080ff;
}
div#left a {
  color: #000080;
  padding: 0 5px;
  text-decoration: none;
  font-weight: bold;
  display: block;
}
div#left a:hover {
  background: #000080;
  color: #ffffff;
  text-decoration: none;
  font-weight: bold;
}

div#mainpage {
  width: 800px;
  float: left;
  margin: 0 15px;
  color: #000080;
}