body {
  font-family: Arial, sans-serif;
  background: #0a0f24;
  color: #fff;
  margin: 0;
  padding: 20px;
  text-align: center;
}

.container {
  max-width: 600px;
  margin: auto;
  padding: 20px;
  background: #121a39;
  border-radius: 12px;
  box-shadow: 0 0 10px #00c3ff;
}

#optionsList {
  list-style-type: none;
  padding: 0;
}

#optionsList li {
  background: #1e2759;
  padding: 10px;
  margin: 8px 0;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s;
}

#optionsList li:hover {
  background: #00c3ff;
  color: #000;
}

button {
  background-color: #00c3ff;
  border: none;
  padding: 10px 20px;
  font-weight: bold;
  border-radius: 8px;
  margin-top: 10px;
  cursor: pointer;
}

button:disabled {
  background-color: #555;
  cursor: not-allowed;
}