body {
  font-family: Arial, sans-serif;
  padding: 20px;
  background: #111;
  color: #fff;
}

input {
  padding: 10px;
  width: 100%;
  margin-bottom: 10px;
}

button {
  padding: 10px;
  width: 100%;
  margin-bottom: 10px;
  background: #007bff;
  color: white;
  border: none;
}

#loginError {
  color: red;
}