.ws-post-archive__post_list {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 40px;
}

@media only screen and (min-width: 660px) {
  .ws-post-archive__post_list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media only screen and (min-width: 1100px) {
  .ws-post-archive__post_list {
    grid-template-columns: repeat(3, 1fr);
  }
}