.thumbnail_grid{
  display:grid;
  justify-content: center;
  grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr;
  z-index: 4;
}

.gallery_container{}

.pic *,
.pic *::before,
.pic *::after {
  box-sizing: inherit;
  margin: 0;
  padding: 0;
}

.pic{
overflow:hidden;
list-style:none;
  height:60vmin;
  margin-left: auto;
  margin-right: auto;
}


.pic  li {
    z-index: 1;
    position: absolute;
}
  
.pic  img {
    height: 60vmin;
    object-fit: cover;
    object-position: top;
}

 .pic li:target {
  z-index: 3;
  animation: slide 1s 1;
}

.pic li:not(:target) {
  animation: hidden 1s 1;
}

@keyframes pic {
  0% {
    transform: translateY(-100%);
  }
  100% {
    transform: translateY(0%);
  }
}

@keyframes hidden {
  0% {
    z-index: 2;
  }
  100% {
    z-index: 2;
  }
}

@media (max-width: 1200px) {
.thumbnail_grid{
  display:grid;
  justify-content: center;
  grid-template-columns: 1fr 1fr 1fr;
}
}

@media (max-width: 800px) {
.thumbnail_grid{
  display:grid;
  justify-content: center;
  grid-template-columns: 1fr 1fr;
}
}