body{
  font-size: 1.5em;
  margin: 20px;
  padding: 40px;
}
#header{
  float: left;
  width: 100%;
  border-style: solid;
  border-width: 2%;
  border-left-width: 4%;
  border-right-width: 4%;
  border-color: gray;
}
#navigation li{
  display: inline;

}
#content{
  clear: left;
  width: 75%;
  border-style: solid;
  border-width: 2%;
  border-left-width: 4%;
  border-right-width: 4%;
  border-color: gray;
}
#aside{
  float: right;
  width: 20%;
  border-style: solid;
  border-width: 2%;
  border-left-width: 4%;
  border-right-width: 4%;
  border-color: gray;
}
#footer{
  clear: both;
	padding: 10px;
  text-align: center;
  border-style: solid;
  border-width: 2%;
  border-left-width: 4%;
  border-right-width: 4%;
  border-color: gray;
}