.caption {
  position: relative;
  bottom: 12px;
  font-size: 18px;
  text-shadow: 1px 1px black;
  color: white;
}
.captionDiv {
  text-align: center;
  background-color: rgba(0, 0, 0, .2);
}
.gallery {
}
.rightArrow {
  position: absolute;
  right: 0;
  cursor: pointer;
}
.leftArrow {
  position: absolute;
  left: 0;
  cursor: pointer;
}