p.title {
  margin-left: 4em;
  margin-right: 4em;
  text-align: center;
  font-size: 120%;
  margin-bottom: 1ex;
  margin-top: 4ex;
}

p.author {
  margin-left: 4em;
  margin-right: 4em;
  text-align: center;
  margin-top: 1ex;
  margin-bottom: 0;
  font-size: 110%;
}

p.affiliation {
  margin-left: 4em;
  margin-right: 4em;
  text-align: center;
  margin-top: 0;
  margin-bottom: 1ex;
}

p.abstract {
  margin-left: 4em;
  margin-right: 4em;
  margin-top: 1ex;
  text-align: justify;
}

p.full-text-link {
  margin-left: 4em;
  margin-right: 4em;
  margin-top: 1ex;
  text-align: left;
}