body {
  font-family: "Helvetica Neue", Helvetica, "Segoe UI", Arial, freesans, sans-serif;
  margin: 1em;
}
h1 {
  text-align: center;
  background-color: #eee;
}
img.screenshot {
  display: block;
  margin: auto;
  width: 640px;
  max-width: 100%;
}
@media (min-width: 1120px) {
  img.screenshot {
    float: right;
    margin: 0 0 1em 1em;
  }
}
span.hover {
  display: none;
}
a:hover + span.hover {
  display: block;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  pointer-events: none;
  background: rgba(0,0,0,0.4);
}
span.hover > img {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  max-width: 100%;
  max-height: 100%;
  box-shadow: 5px 5px 20px rgba(0,0,0,0.4);
}
h2 ~ p, h2 ~ p + ul {
  margin-left: 1em;
}