ナビゲーション強化コンポーネント

<nav class="bg-gray-900 text-white p-4 shadow-lg">
    <div class="container mx-auto flex justify-between items-center">
        <div class="flex items-center">
            <img src="https://picsum.photos/50" alt="Logo" class="mr-3 rounded-full">
            <span class="text-xl font-bold">MyApp</span>
        </div>
        <div class="hidden md:flex space-x-4">
            <a href="#" class="hover:text-gray-300">Home</a>
            <a href="#" class="hover:text-gray-300">About</a>
            <a href="#" class="hover:text-gray-300">Services</a>
            <a href="#" class="hover:text-gray-300">Contact</a>
        </div>
        <div class="flex items-center">
            <img src="https://randomuser.me/api/portraits/men/1.jpg" alt="Avatar" class="w-10 h-10 rounded-full border border-gray-700">
            <button class="ml-4 p-2 bg-gray-700 rounded hover:bg-gray-600 focus:outline-none">Menu</button>
        </div>
    </div>
</nav>
<div class="bg-gray-800 text-white p-4">
    <div class="container mx-auto flex flex-col md:flex-row md:justify-between">
        <div class="flex items-center mb-4 md:mb-0">
            <img src="https://picsum.photos/100/100" alt="Placeholder Image" class="rounded-lg">
            <p class="ml-4">This is a simple navigation enhancement component in dark mode.</p>
        </div>
        <div class="flex space-x-4">
            <a href="#" class="bg-gray-700 px-4 py-2 rounded hover:bg-gray-600">Action 1</a>
            <a href="#" class="bg-gray-700 px-4 py-2 rounded hover:bg-gray-600">Action 2</a>
        </div>
    </div>
</div>
<style>
    @media (prefers-color-scheme: dark) {
        body {
            background-color: #1a202c;
            color: #fff;
        }
    }
</style>