body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 24px;
}

main {
  max-width: 800px;
  margin: auto;
  display: grid;
  gap: 12px;
}

textarea {
  height: 150px;
  padding: 10px;
}

button {
  padding: 10px;
  font-size: 16px;
}

pre {
  background: #f5f5f5;
  padding: 12px;
}