.preorder-buttons {
  display: flex;
  justify-content: center;
  max-width:800px;
  margin:0 auto;
}

.preorder-buttons a {
  width:100%;
}

@media screen and (min-width: 768px) {
  .preorder-buttons a {
    max-width:400px;
  }
}

.preorder-section .section__heading {
  margin-bottom:20px;
}