body {
  font-family: Arial, sans-serif;
  background-color: #0a0a0a;
  color: white;
  text-align: center;
  padding: 2rem;
}

.container {
  background-color: #111;
  border: 1px solid #444;
  border-radius: 10px;
  padding: 2rem;
  max-width: 500px;
  margin: auto;
}

button {
  background-color: #00ff99;
  color: #000;
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  margin-top: 1rem;
}

button:hover {
  background-color: #00cc77;
}