.lightbox {
  position: fixed;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  display: none;
  z-index: 1000; }
  .lightbox .popover {
    position: absolute; }
    .lightbox .popover img {
      width: 100%;
      height: 100%; }
  .lightbox .arrow {
    position: absolute;
    top: 50%;
    color: white;
    font-size: 40px;
    text-decoration: none;
    width: 100px;
    height: 100px;
    line-height: 100px;
    text-align: center; }
  .lightbox .arrow.over {
    border-radius: 50px;
    background-color: rgba(0, 0, 0, 0.5); }
  .lightbox .left {
    left: 0px; }
  .lightbox .right {
    right: 0px; }