.image-column {
  float: left;
  width: 60%;
  max-width: 600px;
  /* limited size of images (only 500px)... */
  margin-right: 2em;
}
.image-column img#gallery-fullsize {
  width: 100%;
  height: auto;
}
.image-column .previews {
  margin-top: 5px;
  text-align: center;
}
.image-column .previews img {
  margin: 1%;
  width: 21%;
  height: auto;
}
.text-column {
  font-size: 1.1em;
  margin-left: 60%;
}
.text-column ul {
  margin-top: 1em;
  margin-left: 1em;
}
.text-column ul li {
  margin-bottom: 0.5em;
}
.text-column ul li ul {
  margin-left: -0.5em;
}
@media screen and (max-width: 680px) {
  .image-column {
    float: none;
    width: 100%;
  }
  .text-column {
    margin-left: 0;
  }
  .text-column ul li {
    margin-bottom: 0.25em;
  }
  .text-column ul ul {
    margin-top: 0.5em;
  }
}
