サイドバーナビゲーションコンポーネント - グレースケール

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    <!-- Sidebar -->
    <div class="flex flex-col w-64 bg-white dark:bg-gray-800 shadow-lg">
        <div class="flex items-center justify-center h-16 shadow-md">
            <span class="text-xl font-semibold text-gray-700 dark:text-white">Company Name</span>
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            <nav class="flex-1 px-2 py-4 bg-gray-200 dark:bg-gray-700">
                <a href="#" class="flex items-center px-4 py-2 text-gray-700 dark:text-gray-200 hover:bg-gray-300 dark:hover:bg-gray-600 rounded">
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                    Dashboard
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                <a href="#" class="flex items-center px-4 py-2 mt-2 text-gray-700 dark:text-gray-200 hover:bg-gray-300 dark:hover:bg-gray-600 rounded">
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                    Projects
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                <a href="#" class="flex items-center px-4 py-2 mt-2 text-gray-700 dark:text-gray-200 hover:bg-gray-300 dark:hover:bg-gray-600 rounded">
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                    Team
                </a>
                <a href="#" class="flex items-center px-4 py-2 mt-2 text-gray-700 dark:text-gray-200 hover:bg-gray-300 dark:hover:bg-gray-600 rounded">
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                    Settings
                </a>
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