#teoricas {
  padding-top: 60px;
}

#teoricas.container h2 {
  font-size: 1.5em;
  padding: 15px 0;
  margin: 0;
}

#teoricas.container h3 {
  font-weight: 700;
  font-size: 1.8em;
  padding-bottom: 7px 0;
  margin: 0;
}

#teoricas.container p {
  font-size: .9em;
}

#teoricas .col-md-4 h3 {
  color: #4bd962;
}

#teoricas .col-md-4.visitas h3 {
  color: #ea589e;
}

#teoricas .violeta {
  background-color: #ea589e;
  color: #fff;
  width: 100%;
  margin-bottom: 30px;
}

#teoricas .cyan {
  background-color: #4bd962;
  color: #fff;
  width: 100%;
  margin-bottom: 30px;
}

#teoricas.container .cyan a,
#teoricas.container .violeta a {
  display: block;
  width: 100%;
  margin-bottom: 2%;
  background-size: cover;
  background-position: center center;
}

#teoricas.container .cyan a:after,
#teoricas.container .violeta a:after {
  content: '';
  display: block;
  width: 100%;
  padding-top: 30%;
}

#teoricas .gris {
  background-color: #666;
  color: #fff;
  width: 100%;
  margin-bottom: 30px;
}

#teoricas.container .gris a {
  display: block;
  width: 100%;
  margin-bottom: 2%;
  background-size: cover;
  background-position: center center;
}

#teoricas.container .gris a:after {
  content: '';
  display: block;
  width: 100%;
  padding-top: 30%;
}