.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
}

.grid-item {
  margin: 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: aquamarine;
  filter: grayscale(100%);
  transition: filter 0.5s ease;
}

.grid-item:hover {
  filter: grayscale(0%);
  transition: 0.5s ease;
}