:root {
  --width: 900px;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0 auto;
  padding: 1rem 2rem;
  font-family: Helvetica, sans-serif;
  font-weight: 300;
  /* max-width: var(--width); */
  line-height: 1.5;
  font-size: 20px;
}
@media (max-device-width: 600px) {
  body {
    font-size: 16px;
  }
}
p {
  margin-left: auto;
  margin-right: auto;
  /* margin: inherit auto; */
  max-width: var(--width);
}
h1 {
  font-size: 3.2rem;
}
h2 {
  font-size: 2.4rem;
  /* margin-top: 3em; */
  margin-top: 1em;
}
h3 {
  font-size: 1.6rem;
  margin-top: 2em;
}
h4 {
  font-size: 1.2rem;
}
h1,
h2,
h3,
h4,
h5,
h6,
ul {
  margin-left: auto;
  margin-right: auto;
  max-width: var(--width);
}
a {
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.fig {
  margin: 0 auto;
  display: flex;
  flex-flow: column nowrap;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
.fig > a {
  display: block;
  box-shadow: 1px 1px 8px #0003;
  border-radius: 4px;
  overflow: hidden;
}
.fig > a > img {
  display: block;
  /* max-width: var(--width); */
  max-width: 100%;
  max-height: calc(100vh - 2 * 3em);
}
.fig.cam > a {
  border-radius: 0;
}
.fig > span {
  display: block;
  font-size: 16px;
  opacity: 0.6;
  padding-top: 4px;
}

@media screen and (orientation: portrait) {
  .fig {
    height: auto;
    margin: 64px auto;
  }
}

#route {
  display: flex;
  justify-content: center;
}
#route > a {
  display: inline-block;
  text-align: center;
}
#route > a > img {
  display: inline-block;
  max-height: 80vh;
  /* max-width: var(--width); */
  width: 100%;
}

.navigation {
  margin: 1rem auto;
  display: flex;
  justify-content: space-between;
  /* max-width: var(--width); */
}

.expandable {
  display: none;
}