body {
  font-family: Arial, sans-serif;
  padding: 2rem;
  max-width: 400px;
  margin: 0 auto;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 0.5rem;
  margin: 0.5rem 0;
}

button {
  padding: 0.5rem 1rem;
}

#message {
  margin-top: 1rem;
  color: red;
}