body {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  margin: 0;
  padding: 0;
}
.container {
  --size: 15rem;
  --span: 1rem;
  display: grid;
  justify-content: center;
  grid-template-columns: repeat(auto-fill, var(--size));
  grid-gap: var(--span);
  width: 100%;
  max-width: calc((var(--size) + var(--span)) * 4);
}
.container img {
  height: var(--size);
  width: 100%;

  object-fit: cover;
  object-position: center;

  background-color: #dddddd;
}
@media screen and (max-width: 16rem) {
  .container {
    --size: calc(100vw - 2rem);
  }
}