style.css

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  display: flex;
  flex-direction: column;
}

#content {
  text-align: center;

  /* Fill the entire height of the page above the footer. */
  flex: 1;

  /* Center child items */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

#content h1 {
  margin: 0em auto;
  font-size: 1000%;
}

@media (prefers-color-scheme: dark) {
  body {
    color: #d7d7d6;
    background: #1c1c1c;
  }
}