.grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-gap: 20px;
  max-width: 1000px;
  margin: 0 auto;
  overflow: hidden;
}

.grid img {
  width: 100%;
  height: 180px;
  padding: 5px;
  border: 1px solid #ddd;
  background: #fff;
  object-fit: cover;
}

@media only screen and (max-width: 640px) {
  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.grid img:hover {
  z-index: 9;
  transform: scale(1.3);
  transition: transform ease 0.5s;
}
.grid img.full {
  position: fixed;
  top: 0; left: 0; z-index: 999;
  width: 100vw; height: 100%;
  object-fit: contain;
  background: rgba(0, 0, 0, 0.8);
}
.grid img.full:hover {
  z-index: 999;
  transform: none;
}

* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
  background: black;
}