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

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}

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

@media (max-width: 600px) {
  .grid {
    grid-template-columns: 1fr;
  }
}