h1 { background-color: blue;
  color: yellow;
  font-size: large;
  padding: 5px;
  border: solid lightblue;
  margin: 0;
  text-align: center;
}

.img {
  text-align: center;
  font-weight: bold;
  font-size: small;
  font-style: italic;
}
.num_pag {
  text-align: center;
  font-style: italic;
}

body.narracion {
  margin-right: 1em; 
  font-family: sans-serif;
  text-align: justify;
}

body {
  background-image: url(../../../../img/fondos/peces.jpg);
  background-repeat: repeat-y;
  background-attachment: fixed;
  background-position: -4em;
  margin-left: 8em;
  background-color: white;
}