* {
  box-sizing: border-box;
}

.gallery {
  position: relative;
}
.gallery-scroller {
  display: flex;
  align-items: center;
  flex-direction: column;
  height: 100vh;
  overflow-x: hidden;
  overflow-y: scroll;
  /*scroll-snap-type: y mandatory;*/
  -ms-scroll-snap-type: y mandatory;
  -webkit-scroll-snap-type: y mandatory;
      

}
.gallery-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100vw;
  min-width: 100%;
  min-height: 100%;
  scroll-snap-align: center;
}
.pagination {
  position: fixed;
  top: 50%;
  right: 60px;
  width: 20px;
  transform: translateY(-50%);
  z-index: 9;
}
.pagination-item {
  height: 20px;
  margin-bottom: 5px;
  position: relative;
  cursor: pointer;
}
.pagination-item:last-child {
  margin-bottom: 0;
}
.pagination-item:after {
  content: '';
  position: absolute;
  top: 0;
  right: 4px;
  bottom: 0;
  width: 13px;
  height: 13px;
  margin: auto;
  border: 2px solid #ccc;
  border-radius: 50%;
  transition: box-shadow 0.3s ease;
  background: #fff;
}
.pagination-item.active:after {
 /* box-shadow: inset 0 0 0 5px;*/
 background: #333;
 border: 2px solid #333;
}