会话超时警报组件

<div class="fixed inset-0 z-50 flex items-center justify-center p-4 bg-gray-900/50 dark:bg-black/70 font-sans">
  <div class="relative w-full max-w-sm rounded-lg shadow-xl bg-gray-100 dark:bg-gray-800 border-2 border-gray-300 dark:border-gray-700 overflow-hidden">
    
    <!-- Header with exposed screw-like elements -->
    <div class="flex items-center justify-between p-4 bg-gray-200 dark:bg-gray-700 border-b-2 border-gray-300 dark:border-gray-700">
      <h3 class="text-lg font-semibold text-gray-700 dark:text-gray-200 uppercase tracking-wide">Session Timeout</h3>
      <div class="flex space-x-2">
        <span class="block w-3 h-3 rounded-full bg-gray-400 dark:bg-gray-600 border border-gray-500 dark:border-gray-500"></span>
        <span class="block w-3 h-3 rounded-full bg-gray-400 dark:bg-gray-600 border border-gray-500 dark:border-gray-500"></span>
      </div>
    </div>

    <!-- Content body -->
    <div class="p-6 text-center">
      <svg class="mx-auto mb-4 h-12 w-12 text-gray-500 dark:text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z"></path>
      </svg>
      <p class="mb-4 text-gray-700 dark:text-gray-300">
        Your session is about to expire due to inactivity.
      </p>
      <p class="text-sm text-gray-600 dark:text-gray-400 font-mono">
        Please extend your session to continue.
      </p>
      <div class="mt-6">
        <p class="text-2xl font-bold text-gray-800 dark:text-gray-200 tabular-nums">00:59</p>
      </div>
    </div>

    <!-- Footer with utilitarian buttons -->
    <div class="flex flex-col sm:flex-row justify-end gap-3 p-4 bg-gray-200 dark:bg-gray-700 border-t-2 border-gray-300 dark:border-gray-700">
      <button type="button" class="w-full flex-1 px-5 py-2 text-sm font-medium text-gray-700 dark:text-gray-300 bg-gray-300 dark:bg-gray-600 rounded-md border-2 border-gray-400 dark:border-gray-500 hover:bg-gray-400 dark:hover:bg-gray-500 transition duration-200 ease-in-out uppercase tracking-wide">
        Logout
      </button>
      <button type="button" class="w-full flex-1 px-5 py-2 text-sm font-medium text-gray-100 dark:text-gray-900 bg-gray-600 dark:bg-gray-400 rounded-md border-2 border-gray-700 dark:border-gray-300 hover:bg-gray-700 dark:hover:bg-gray-300 transition duration-200 ease-in-out uppercase tracking-wide">
        Extend Session
      </button>
    </div>
  </div>
</div>