*, *:before, *:after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
.containerg {
  
  height: auto;
  width: 100%;
   
}


.demo3__gallery {
  width: 380px;
  height: 380px;

  flex-shrink: 0;

  perspective: 700px;
  border-radius: 5px;
}

.demo3__part {
  position: relative;
  float: left;
  width: 110px;
  height: 110px;
  margin: 0.5px;
  transform: rotateY(180deg);
  transform-style: preserve-3d;
  transition: all 0.3s ease-in-out;
}
.demo3__part:hover .demo3__part-front {
  box-shadow: 0 0 10px black;
  transform: scale(0.96);
}
.demo3__part:hover .demo3__part-front:after {
  opacity: 0;
}
.demo3__part-front, .demo3__part-back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
  border-radius: 5px;
  cursor: pointer;
}
.demo3__part-front {
  background-color: lightslategrey;
  background-size: cover;
  background-position: center;
  transform: rotateX(0deg);
  transition: all 0.2s ease;
}
.demo3__part-front:after {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: black;
  content: "";
  opacity: 0.1;
  transition: all 0.2s ease;
}
.demo3__part-back {
  transform: rotateY(180deg) rotateX(0deg);
}
.demo3__part-back-inner {
  width: 360px;
  height: 360px;
  background-size: cover;
  background-position: center;
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
}
.demo3__help {
  margin-bottom: 7px;
  font-size: 30px;
  font-family: "Yanone Kaffeesatz", sans-serif;
  color: white;
}
.demo3__help a {
  color: white;
}
.demo3__help a:hover {
  color: #E39999;
}

.demo3__part-1-1 .demo3__part-back-inner {
  transform: translate(0px, 0px);
}

.demo3__part-1-2 .demo3__part-back-inner {
  transform: translate(-110px, 0px);
}

.demo3__part-1-3 .demo3__part-back-inner {
  transform: translate(-220px, 0px);
}


.demo3__part-2-1 .demo3__part-back-inner {
  transform: translate(0px, -110px);
}

.demo3__part-2-2 .demo3__part-back-inner {
  transform: translate(-110px, -110px);
}

.demo3__part-2-3 .demo3__part-back-inner {
  transform: translate(-220px, -110px);
}

.demo3__part-3-1 .demo3__part-back-inner {
  transform: translate(0px, -220px);
}

.demo3__part-3-2 .demo3__part-back-inner {
  transform: translate(-110px, -220px);
}

.demo3__part-3-3 .demo3__part-back-inner {
  transform: translate(-220px, -220px);
}


.demo3__part-4-1 .demo3__part-back-inner {
  transform: translate(0px, -330px);
}

.demo3__part-4-2 .demo3__part-back-inner {
  transform: translate(-110px, -330px);
}

.demo3__part-4-3 .demo3__part-back-inner {
  transform: translate(-220px, -330px);
}

.show-front {
  transform: none;
}