body {
  background: #121212;
  color: #ffffff;
  font-family: sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  text-align: center;
  background: #1e1e1e;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(255,255,255,0.1);
}

button {
  background: #00c853;
  color: white;
  padding: 15px 30px;
  font-size: 16px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
}

button:hover {
  background: #00b248;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}