h1 { text-align:center; 
	 font-size:20px; 
	 background:#FFC; 
	 vertical-align:text-bottom;
	 position:relative;
	 margin-top:0;
	 border-radius: 15px 15px 15px 15px;
	 box-shadow: 30px 10px 20px #aaa; 
	 }
.volver {width:100%; 
		 color:#FFF; 
		 background:#999; 
		 font-size:20px; 
		 border-radius: 15px 15px 15px 15px;
		 position:relative;
		}	 
a { display:block;
	text-decoration: none;}		 
img {max-width:90%;}
p {text-align:justify; }