#heading {
    float: left;
	display: block;
	text-align: center;
	margin-bottom: 1em;
	border: 1px solid blue;
}
#heading * {
	display: inline;
	padding: 4px;
	user-select: none;
	cursor: pointer;
	vertical-align: middle;
}
#heading li.active {
	background-color: #66ccff;
	border-radius: 3px;
	-webkit-border-radius: 3px;
	-opera-border-radius: 3px;
	-moz-border-radius: 3px;
}

#panes {
	text-align: justify;
	border-style: none;
	margin: 0;
	padding: 0;
}

#panes p {
  width: 600px;
  margin: 0 auto 1em auto;
  line-height: 1.2em;
}

#panes div div { overflow: hidden; }

#previous { float: none; cursor: pointer; }
#next { float: none; cursor: pointer; }