.image-gallery {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

.image-gallery {
  margin: 2em 0 0 0;
  padding: 0;
  text-align: left;
}

.image-gallery li {
  background: rgba(200, 200, 200, 0.2);
  display: inline-block;
  height: 250px;
  margin: 0 0 2em 2em;
  width: 375px;
}

.image-gallery li.section-title {
  background: none;
  display: block;
  height: auto;
  margin: 0 0 0 2em;
  padding: 0;
  width: auto;
}

.image-gallery img {
  display: none;
  margin: auto;
  max-height: 100%;
  max-width: 100%;
}

.image-gallery img[src] {
  background: rgba(0, 0, 0, 0.2);
}

.image-gallery li.vis {
  background: none;
}

.vis img {
  display: block;
}

.full-size-container {
  background: rgba(0, 0, 0, 0.95);
  bottom: 0;
  left: 0;
  margin: 0;
  position: fixed;
  right: 0;
  top: 0;
}

.full-size-container img {
  left: 50%;
  max-height: 100%;
  max-width: 100%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
}

.full-size-container figcaption {
  background-image: linear-gradient(0deg, black, transparent);
  bottom: 0;
  box-sizing: border-box;
  color: white;
  padding: 1em;
  position: absolute;
  text-align: center;
  text-shadow: 1px 0 0 black;
  width: 100%;
}

@media (max-width: 749px) {
  .image-gallery {
    text-align: center;
  }

  .image-gallery li.section-title,
  .image-gallery li {
    margin: 0 0 1em 0;
  }
}