body {
  font-family: sans-serif;
  background: #1e1e1e;
  color: white;
  padding: 2rem;
  max-width: 600px;
  margin: auto;
}
textarea, button {
  width: 100%;
  margin: 10px 0;
  padding: 10px;
  font-size: 1rem;
  border-radius: 6px;
  border: none;
  box-sizing: border-box;
}
button {
  background: #3a86ff;
  color: white;
  cursor: pointer;
}
button:hover {
  background: #265fcc;
}