.row-description {
  margin: 200px auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 70%;
}
.column-description {
  width: 90%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
h3 {
  color: #233771;
}

@media only screen and (max-width: 800px) {
  .main {
    height: auto;
  }
  .row-description {
    margin: 100px auto;
    width: 80%;
  }
}