.cajacompartir {
    text-align: left;
    clear: both;
    margin-top: 2em;
    margin-bottom: 2em;
    background-color: #e6e6e6;
    padding: 0.3em;
    border: 2px solid  #e6e6e6;
    border-radius: 0px;
}


span.h2mod{
  font-family: Arial;
  font-style: italic;
  font-size: 17px;
  line-height: 110%;
  display: block;

}

.h2deprueba{
  font-family: Arial;
  font-style: italic;
  font-size: 17px;
  line-height: 110%;
  display: block;

}

span.h1mod{
 
  font-weight: bold;
  font-style: normal;
  font-size: 21px;
  line-height: 110%;
  display: block;
}