#gallerybox {
  position: fixed;
  left: 0;
  top: 0;
  width: 100vw;
  height: 100vh;
  z-index: 10000;
}
.slide-show-holder .close-btn {
  display: none;
  position: absolute;
  right: -34px;
  top: 0;
  padding: 1em;
  z-index: 1;
  font-size:0;
  color: #ccc;
  cursor: pointer;
  border-radius:50%;
  height: 25px;
  width: 25px;
  border:1px solid #ccc;
  text-align:center;
}
.slide-show-holder .close-btn:after{
  content:'x';
  font-size: 19px;
  position: relative;
  top: -4px;
}

#gb-overlay {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}

#gb-big {
  position: absolute;
}

#gb-list {
  position: absolute;
  width: 100%;
  box-sizing: border-box;
  left: 0;
  bottom: 0;
  padding: 0 20px 20px;
  text-align: center;
  white-space: nowrap;
  overflow-x: hidden;
  right: 0;
  margin: 0 auto;
}
#gb-list:before {
  content: '';
  display: inline-block;
  vertical-align: middle;
  height: 100%;
}
#gb-list > .left,
#gb-list > .right {
  position: absolute;
  width: 20px;
  top: 40%;
  font-weight: 600;
  color: #ccc;
  cursor: pointer;
  opacity: 0.3;
  -webkit-transition: opacity 1s; /* Safari */
  transition: opacity 1s;
}
#gb-list > .left:hover,
#gb-list > .right:hover{
    opacity: 1;
}

#gb-list > .left {
  left: 15px;
}

#gb-list > .right {
  right:15px;
  transform: rotate(-45deg);
  -webkit-transform: rotate(-45deg);
}

#gb-list > .left:after {
  left:15px;
  transform: rotate(135deg);
  -webkit-transform: rotate(135deg);
}

#gb-list > .right:after,
#gb-list > .left:after {
  border: solid #000;
  border-width: 0 5px 5px 0;
  display: inline-block;
  padding: 6px;
  content: '';
}




#gb-list > img {
  vertical-align: middle;
  margin: 0 1em;
  max-height: 75%;
  cursor: pointer;
}