.cards-deck>div:first-of-type {
  display: flex;
  flex-direction: column;
  gap: 10px;

  .card {
    padding: 20px 10px;

    background-color: transparent;

  }
}

@media (min-width: 769px) {
  .cards-deck>div:first-of-type {
    flex-direction: row;
  }
}