body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #f5f5f5;
  color: #111;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
}

h1 { margin-bottom: 1rem; }

.container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: 100%;
  max-width: 40rem;
}

textarea {
  width: 100%;
  padding: 0.5rem;
  font-family: inherit;
  font-size: 1rem;
  box-sizing: border-box;
}

button {
  padding: 0.5rem 1rem;
  font-size: 1rem;
  cursor: pointer;
}