@import url('https://fonts.googleapis.com/css?family=Roboto');
.caja {
	width: 80%;
    margin-left: auto;
    margin-right: auto;
    font-family: Arial;
    padding: 0.5em;

}
.caja header {
	font-family: 'Roboto', sans-serif;
    text-align: center;
    padding: 20px;
    font-size: 2em;
    color: white;
    margin: 0 0 25px; 
    border-radius: 0px 23px 0px 23px;
    -moz-border-radius: 0px 23px 0px 23px;
    -webkit-border-radius: 0px 23px 0px 23px;
    border: 2px solid #0944b8;
    background: linear-gradient(#889ccf, grey);
}
.caja .articulo{
	text-align: justify;
	float: left;
	background-color: #e0e0e0;
	padding: 0.5em;
	 border-radius: 13px 13px 13px 13px;
}
h2 {color: green;}