@media (prefers-color-scheme: dark) {
  body {
    background-color: #555;
    color: #fff;
  }

  textarea {
    background-color: #333;
    color: #fff;
  }
}

@media (prefers-color-scheme: light) {
  body {
    background-color: #888;
    color: #333;
  }

  textarea {
    background-color: #bbb;
    color: #333;
  }
}

h3 {
  text-align: center;
}

#container {
  display: flex;
  justify-content: center;
  gap: 20px;
}