body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: #f4f4f4;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  font-size: 27px;
}

main {
  text-align: center;
  padding: 20px;
  max-width: 480px;
}

#author {
  font-style: italic;
  opacity: 0.8;
  margin-top: 0.5em;
  display: block;
}

@media (prefers-color-scheme: dark) {

  body,
  main {
    background-color: #141414;
    color: hsla(0, 0%, 100%, 0.9);
  }
}

@media (max-width: 480px) {
  body {
    font-size: 18px;
  }
}