body {
  font-family: sans-serif;
  background-color: #f4f4f4;
  padding: 20px;
}

.container {
  max-width: 500px;
  margin: auto;
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1); /* optional visual polish */
}

input,
button {
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 8px;
  font-size: 1rem;
}

#result {
  margin-top: 20px;
  white-space: pre-wrap; /* keep newlines and wrap long lines */
}