body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #222;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  text-align: center;
}

button {
  padding: 15px 30px;
  font-size: 1.2em;
  border: none;
  border-radius: 8px;
  background-color: #4CAF50;
  color: white;
  cursor: pointer;
  margin: 10px;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #45a049;
}

.fade {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.show {
  opacity: 1;
}