.main-content > .main .posts {
  display: grid;
}

.main-content > .main .posts {
  grid-template-columns: repeat(2, 1fr);
  gap: 3em;
}
@media screen and (max-width: 700px) {
  .main-content > .main .posts {
    grid-template-columns: 1fr;
  }
}