.btn {
  @apply bg-gray-200 dark:bg-gray-600 text-gray-900 dark:text-white px-4 py-3 rounded hover:bg-gray-300 dark:hover:bg-gray-500 transition;
}

.operator {
  @apply bg-yellow-300 dark:bg-yellow-600 hover:bg-yellow-400 dark:hover:bg-yellow-500;
}