main.single {
  width: 100%;
  max-width: 1024px;
  margin: 10rem auto;
  padding: 0 4rem;
}

.error404 main.single {
  text-align: center;
}

main.single h1 {
  font-size: 2em;
  font-weight: bold;
}
main.single h2 {
  font-size: 1.4em;
  font-weight: bold;
}

main.single h3 {
  font-size: 1em;
  font-weight: bold;
}

main.single h4 {
  font-size: 0.8em;
  font-weight: bold;
}

main.single h1, main.single h2, main.single h3, main.single h4, main.single p {
  margin-bottom: .5em;
}

.error404 main.single h1 {
  font-size: 9em;
  margin-bottom: 0;
}