.demo {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  width: 100%;
  padding: 20px 1%;
  box-sizing: border-box;
  max-height: none;
}

.demo__gallery {
  display: grid;
  grid-template-columns: repeat(6, 130px);
  grid-template-rows: repeat(4, 130px);
  gap: 4px;
  justify-content: center;
  align-content: center;
  perspective: 700px;
  border-radius: 5px;
  margin: 0 auto;
}

.demo__placeholder {
  width: 130px;
  height: 130px;
  margin: 2px;
    background-color: lightslategrey;
  border-radius: 5px;
}

.demo__part {
  position: relative;
  float: left;
  width: 130px;
  height: 130px;
  margin: 2px;
  transform: rotateY(180deg);
  transform-style: preserve-3d;
  transition: all 0.3s ease-in-out;
}

.demo__part:hover .demo__part-front {
  box-shadow: 0 0 10px black;
  transform: scale(0.96);
}

.demo__part:hover .demo__part-front:after {
  opacity: 0;
}

.demo__part-front,
.demo__part-back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  backface-visibility: hidden;
  border-radius: 5px;
  cursor: pointer;
}

.demo__part-front {
  background-color: lightslategrey;
  background-size: cover;
  background-position: center;
  transform: rotateX(0deg);
  transition: all 0.2s ease;
}

.demo__part-front:after {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: black;
  content: "";
  opacity: 0.5;
  transition: all 0.2s ease;
}

.demo__part-back {
  transform: rotateY(180deg) rotateX(0deg);
}

.demo__part-back-inner {
  width: calc(130px * 6 + 2px * (6 - 1) * 2);
  height: calc(130px * 4 + 2px * (4 - 1) * 2);
  background-size: cover;
  background-position: center;
  backface-visibility: hidden;
}

.demo__help {
  margin-bottom: 7px;
  font-size: 30px;
  font-family: "Yanone Kaffeesatz", sans-serif;
  color: white;
}

.demo__help a {
  color: white;
}

.demo__help a:hover {
  color: #e39999;
}

/* Generated per-tile position translations */
.demo__part-1-1 .demo__part-back-inner {
  transform: translate(0px, 0px);
}

.demo__part-1-2 .demo__part-back-inner {
  transform: translate(-134px, 0px);
}

.demo__part-1-3 .demo__part-back-inner {
  transform: translate(-268px, 0px);
}

.demo__part-1-4 .demo__part-back-inner {
  transform: translate(-402px, 0px);
}

.demo__part-1-5 .demo__part-back-inner {
  transform: translate(-536px, 0px);
}

.demo__part-1-6 .demo__part-back-inner {
  transform: translate(-670px, 0px);
}

.demo__part-2-1 .demo__part-back-inner {
  transform: translate(0px, -134px);
}

.demo__part-2-2 .demo__part-back-inner {
  transform: translate(-134px, -134px);
}

.demo__part-2-3 .demo__part-back-inner {
  transform: translate(-268px, -134px);
}

.demo__part-2-4 .demo__part-back-inner {
  transform: translate(-402px, -134px);
}

.demo__part-2-5 .demo__part-back-inner {
  transform: translate(-536px, -134px);
}

.demo__part-2-6 .demo__part-back-inner {
  transform: translate(-670px, -134px);
}

.demo__part-3-1 .demo__part-back-inner {
  transform: translate(0px, -268px);
}

.demo__part-3-2 .demo__part-back-inner {
  transform: translate(-134px, -268px);
}

.demo__part-3-3 .demo__part-back-inner {
  transform: translate(-268px, -268px);
}

.demo__part-3-4 .demo__part-back-inner {
  transform: translate(-402px, -268px);
}

.demo__part-3-5 .demo__part-back-inner {
  transform: translate(-536px, -268px);
}

.demo__part-3-6 .demo__part-back-inner {
  transform: translate(-670px, -268px);
}

.demo__part-4-1 .demo__part-back-inner {
  transform: translate(0px, -402px);
}

.demo__part-4-2 .demo__part-back-inner {
  transform: translate(-134px, -402px);
}

.demo__part-4-3 .demo__part-back-inner {
  transform: translate(-268px, -402px);
}

.demo__part-4-4 .demo__part-back-inner {
  transform: translate(-402px, -402px);
}

.demo__part-4-5 .demo__part-back-inner {
  transform: translate(-536px, -402px);
}

.demo__part-4-6 .demo__part-back-inner {
  transform: translate(-670px, -402px);
}

.show-front {
  transform: none;
}

.demo__gallery.full-image {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  z-index: 2;
  transition: all 0.6s ease-in-out;
  cursor: pointer;
}

.demo__gallery.full-image .demo__part {
  opacity: 0;
  pointer-events: none;
}

.demo__gallery:not(.full-image) .demo__part {
  opacity: 1;
  transition: opacity 0.5s ease-in-out;
}

/* --- RESPONSIVENESS --- */
@media (max-width: 1024px) {
   .demo__gallery {
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(4, 1fr);
    width: 90vw;
    gap: 4px;
  }
}

@media (max-width: 768px) {
  .demo__gallery {
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(3, 1fr);
    width: 90vw;
    gap: 4px;
  }

  .demo__gallery.full-image {
    background-size: contain;
    background-position: center center;
  }
}

@media (max-width: 480px) {
  .demo__gallery {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    width: 95vw;
    gap: 3px;
  }

  .demo__placeholder {
    border-radius: 4px;
  }

  .demo__gallery.full-image {
    background-size: contain;
    background-position: center;
    background-color: rgba(0, 0, 0, 1);
  }
}