body {
  margin: 0;
  font-family: sans-serif;
  font-size: 1rem;
}

.demo-page {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  box-sizing: border-box;
  place-content: center;
  place-items: center;
  min-height: 100dvh;
  padding: 64px 16px;
  background-color: #f5f5f5;
}

.dark-page {
  background-color: #222;
}

.index-page {
  padding: 40px 16px;
  color: #222;
  background-color: #fff;
}