.chat{
  width:660px;
  overflow:hidden;
  border:1px solid black;
  background-color: #eee;
}
.chat .messages{
  width:100%;
  height:200px;
  overflow:hidden;
}
.chat .messages:hover{
  overflow-y:scroll;
}
.chat .messages > div{
  padding:15px;
  border-bottom:1px dashed #999;
  text-align: left;
}
.mensaje{
  padding-left:0px;
}
.header-chat{
	background-color: #555;
	color: white;
	padding: 10px;
	text-align: center;
	text-shadow: 1px 1px 3px rgba(0,0,0,0.6);
}
.contenido{
	background-color: white;
	border-radius: 5px;
	box-shadow: 2px 2px 3px rgba(0,0,0,0.3);
	display: inline-block;
	font-size: 15px;
	padding: 5px;
	vertical-align: top;
	width: 590px;
	margin-bottom: 5px;
}