.indexthumbnails {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-gap: 20px;
}

.indexthumbnails img {
  width: 25%;
  height: auto;
  display: block;
  margin: 0 auto;
  transition: transform 0.3s ease-in-out;
}

.indexthumbnails img:hover {
  transform: scale(1.25);
}