#images-preview {
  background-color: #000;
  padding: 0 20px;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 99;
}
#images-preview::before,
#images-preview::after {
  position: absolute;
  left: 0;
  right: 0;
  background-color: #000;
  height: 5px;
  content: '';
  z-index: 99;
}
#images-preview::before {
  top: 0;
}
#images-preview::after {
  bottom: 0;
}
.imgs-preview-holder {
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  position: fixed;
  z-index: 9999;
}
.imgs-preview-dots {
  position: fixed;
  bottom: 1em;
  left: 0;
  right: 0;
  height: 10px;
  text-align: center;
  z-index: 9999;
}
.imgs-preview-dots ul{
  display: table;
  margin: 0 auto;
  padding: 0;
}
.imgs-preview-dots li{
  float: left;
  width: 8px;
  height: 8px;
  display: table-cell;
  margin: 0 4px;
  border-radius: 50%;
  background-color: rgba(255,255,255,0.3);
}
.imgs-preview-dots li.active{
  background-color: #fff;
}
#images-preview > div {
  position: relative;
  float: left;
  height: 100%;
  padding: 0 5px;
  box-sizing: border-box;
}
#images-preview .wrapper {
  position: absolute;
  left: 0;
  right: 0;
  height: 400px;
  top: 50%;
  margin-top: -200px;
  background-size: cover;
}
#images-preview .mask {
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  z-index: -1;
}
#images-preview .mask::before {
  position: absolute;
  content: '';
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  background-color: rgba(0,0,0,0.3);
}
#images-preview .spin {
  width: 32px;
  height: 32px;
  position: absolute;
  top: 50%;
  left: 50%;
  margin-top: -16px;
  margin-left: -16px;
  z-index: 9999;
}
#images-preview .image {
  display: none;
  width: 100%;
  height: auto;
}