.card {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  height: 10rem;
  min-width: 20rem;
  padding: 3em;
  margin: 1.7rem; /* for better display */
  border: 0.3em solid black;
  border-radius: 2em;
  background-color: white;
}

.item {
  margin: 1rem;
}

#main {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
}