.interface {
  color: #ffffff;
  font-family: Helvetica; }
  .interface .label {
    color: #cccccc; }
  .interface.hidden {
    display: none; }

#top {
  position: absolute;
  z-index: 2;
  width: 100%;
  padding: 1em;
  box-sizing: border-box;
  background: rgba(0, 0, 0, 0.5); }
  #top .details {
    margin: 0;
    padding: 0;
    list-style: none;
    text-align: center;
    line-height: 1.5; }
    #top .details li {
      display: inline;
      margin: 0.5em; }

#nav .nav-item {
  position: absolute;
  z-index: 1;
  top: 50%;
  color: #fff;
  padding: 0.5em;
  background: rgba(0, 0, 0, 0.5); }
  #nav .nav-item.previous {
    left: 0; }
  #nav .nav-item.next {
    right: 0; }

#viewer {
  width: 100%;
  height: 100%;
  overflow: scroll;
  background: #eeeeee; }
  #viewer .image {
    display: none;
    width: 100%;
    height: 100%;
    background-repeat: no-repeat;
    background-position: 50% 50%;
    background-size: contain; }
    #viewer .image.active {
      display: block;
      margin: 0 auto; }