body {
  margin-left: 10%;
  margin-right: 10%;
  color: black;
  background: white;
  font-family: "Times New Roman", sans-serif;
  font-size: 100%;
 }

p {
  text-align: justify;
}

h1 {
  text-align: center;
  margin-top:    2em;
  margin-bottom: 2em;
  font-size:     120%;
}

#fecha {
  margin-top:    2em;
  margin-bottom: 2em;
}

#firma {
  font-weight: bold;
  margin-top:    2em;
  margin-bottom: 2em;
}

ul.enlaces_relacionados {
  list-style-type: none;
  font-weight:     bold;
  font-size:       120%;
  text-align:      right;
}