.principal h2 {
  text-align: center;
  color: #202B6D;
  font-size: 40px;
  margin: 80px 0px 50px 0px;
}

.principal p {
  font-size: 22px;
  text-align: center;
}

.principal .row {
  max-width: 900px;
  margin: 0 auto;
}

.principal .col-md-4 {
  font-size: 20px;
  color: #444;
  line-height: 40px;
}

.principal .col-12:not(:last-child) {
  margin-bottom: 30px;
}

.principal input[type=text], .principal input[type=email] {
  border-radius: 40px;
  height: 40px;
  border: solid 1px #ddd;
  font-size: 16px;
  line-height: 40px;
  padding: 0px 20px;
  width: 100%;
  box-sizing: border-box;
  margin: 0px 5px;
  text-align: left;
  margin-bottom: 10px;
}

.btn-center {
  width: 100%;
  max-width: 280px;
  margin: auto;
  box-sizing: border-box;
  text-align: center;
  line-height: 40px;
  background: none;
  border: solid 2px #8CC63F;
  color: #2341b0;
  border-radius: 20px;
  font-weight: bold;
  cursor: pointer;
  display: block;
  margin-bottom: 30px;
}

.titulos-registro {
  background-color: #363f9c;
  color: #fff;
  height: 50px;
  line-height: 50px;
  font-size: 20px;
  text-align: center;
  margin: 30px 0px;
}

.col-botones {
  max-width: 450px;
  width: 100%;
  margin: 20px auto;
  float: none !important;
  min-height: 40px;
  display: block;
  text-align: center;
  line-height: 40px;
}

.center {
  margin-top: 20px;
}

.col-botones select {
  height: 30px;
  width: 50px;
  margin: 5px 0px;
}

.principal img {
  max-width: 270px;
}

.principal #respuesta {
  color: #000 !important;
  line-height: 18px !important;
  text-align: center;
}