main {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(20rem, 1fr));
  width: 90vw;
  margin: auto;
  column-gap: 1rem;
  row-gap: 1rem;
}

img {
  display: block;
  max-width: 100%;
}

@media screen and (max-width: 480px) {
  main{
  grid-template-columns: repeat(auto-fill, minmax(5rem, 1fr));
  }
}