.div-block {
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.section {
  margin-left: auto;
  margin-right: auto;
}

.submit-button {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.div-block-2 {
  text-align: center;
}