body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 2em;
}

@media (width <= 1024px) {
  body {
    font-size: 1.5em;
  }
}

@media (width <= 600px) {
  body {
    font-size: 1em;
  }
}

img {
  max-height: 70vh;
}

main {
  text-align: center;
  padding: 0 2em;
}

ul li {
  text-align: left;
  line-height: 1.5em;
}

pre {
  text-align: left;
}

section {
  display: none;
}

footer {
  position: fixed;
  bottom: 0;
  padding: 1em 0;
}