main {
  padding-bottom: 20px;
}
ul {
  list-style: none;
  margin: 0 0 30px 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  width: 100%;
}
li {
  width: calc((100% - 20px) / 3);
  flex-shrink: 0;
  margin: 0 0 10px 0;
}
img {
  width: 100%;
  filter: grayscale(100%) contrast(30%) brightness(150%);
}
li.full-width {
  width: 100%;
}
li.full-width img {
  width: auto;
  height: 200px;
}
div.buttons {
  position: fixed;
  top: 10px;
  right: 10px;
  padding: 5px 10px;
  z-index: 1;
}
div.buttons button {
  margin: 0 0 0 20px;
  height: 30px;
}
main.is-flipped img {
  transform: scaleX(-1);
}
p {
  display: none;
  margin: 0 0 10px 0;
  font-size: 14px;
  position: fixed;
  bottom: 40%;
  left: 0;
  width: 100%;
  z-index: 1;
  background-color: #fff;
  padding: 5px;
}
li.current img {
  box-shadow: 0 0 0 2px black;
}
li.current p {
  display: block;
}
a {
  display: inline-block;
  margin: 0 0 5px 0;
}