* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

main {
  column-count: 1;
  break-inside: avoid;
  gap: 0.5rem;
  padding: 0.5rem;
}

main img {
  width: 100%;
  margin-bottom: 0.25rem;
}
@media only screen and (min-width: 700px) {
  main {
    column-count: 2;
  }
}
@media only screen and (min-width: 1000px) {
  main {
    column-count: 3;
  }
}
@media only screen and (min-width: 1300px) {
  main {
    column-count: 4;
  }
}