.page-container {
  max-width: 900px;
  margin: 2em auto;
  text-align: center;
  padding-left: 1em;
  padding-right: 1em;
}
.grid {
  display: block;
}
.grid > * {
  padding: 1rem;
}
@media (min-width: 768px) {
  .grid {
    display: grid;
    grid-auto-rows: 1fr;
    grid-template-columns: 1fr 1fr;
  }
}