body {
  background: #fffffa;
  color: #898a7b;
  margin: 0;
  font-family: ms gothic;
}

.wrap {
  margin: 40px auto;
  position: relative;
  width: 80%;
}
.grid {
  padding: 10px;
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}
.box {
  position: relative;
  margin: 10px;
  overflow: hidden;
}
/* popup image */
.box::after {
  content: "";
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 70%;
  height: 70%;
  background: url("https://files.catbox.moe/jqoptk.gif") no-repeat center/cover;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.box:hover::after {
  opacity: 1;
}
.thumbnail {
  width: 100%;
  aspect-ratio: 1/1;
  object-fit: cover;
  filter: sepia(0.2);
  opacity: 0.4;
}

.thumbnail:hover {
  transform: rotate(8deg);
}