h1 {
  margin-top: 75px;
  margin-bottom: 35px;
}

.mt-25 {
  margin-top: 35px;
}

.text-center {
  text-align: center;
}

img {
  max-width: 450px;
  margin: 15px;
}

input {
  text-align: center;
  margin-bottom: 35px;
}

.pre-container {
  width: 750px;
  margin: 15px auto 75px;
  overflow: auto;
  background: #f9f9f9;
  padding: 5px 15px;
}