Data Visualization Components Component

<div class="bg-gray-200 text-gray-800 dark:bg-gray-800 dark:text-gray-200 p-8 font-sans">
  <div class="container mx-auto">

    <!-- Header -->
    <header class="flex justify-between items-center mb-8">
      <h1 class="text-3xl font-bold text-indigo-700 dark:text-teal-400">Data Insights</h1>
      <div class="flex items-center">
        <span class="mr-4">Theme:</span>
        <button class="px-3 py-1 rounded bg-indigo-700 text-white dark:bg-teal-400 dark:text-gray-900" onclick="document.documentElement.classList.toggle('dark')">Toggle Dark Mode</button>
      </div>
    </header>

    <!-- Main Content -->
    <div class="grid grid-cols-1 md:grid-cols-2 gap-8">

      <!-- Chart Area -->
      <section class="bg-white dark:bg-gray-700 p-6 rounded-lg shadow-lg">
        <h2 class="text-xl font-semibold mb-4 text-indigo-700 dark:text-teal-400">Sales Performance</h2>
        <!-- Placeholder for a complex chart - In a real scenario, this would be an SVG or canvas element -->
        <div class="h-64 bg-gray-300 dark:bg-gray-600 rounded-md flex items-center justify-center text-gray-500 dark:text-gray-400">
          [ Complex Chart Placeholder ]
        </div>
        <div class="mt-4 text-sm text-gray-600 dark:text-gray-400">
          <p>Detailed sales data visualization would appear here.</p>
        </div>
      </section>

      <!-- Metrics and Details -->
      <section class="grid grid-cols-1 sm:grid-cols-2 gap-6">

        <!-- Metric Card 1 -->
        <div class="bg-white dark:bg-gray-700 p-6 rounded-lg shadow-lg">
          <h3 class="text-lg font-semibold mb-2 text-indigo-700 dark:text-teal-400">Total Revenue</h3>
          <p class="text-2xl font-bold text-gray-800 dark:text-gray-200">$150,000</p>
          <p class="text-sm text-gray-600 dark:text-gray-400">+12% from last month</p>
        </div>

        <!-- Metric Card 2 -->
        <div class="bg-white dark:bg-gray-700 p-6 rounded-lg shadow-lg">
          <h3 class="text-lg font-semibold mb-2 text-indigo-700 dark:text-teal-400">New Users</h3>
          <p class="text-2xl font-bold text-gray-800 dark:text-gray-200">3,500</p>
          <p class="text-sm text-gray-600 dark:text-gray-400">-5% from last month</p>
        </div>

        <!-- Details Card -->
        <div class="bg-white dark:bg-gray-700 p-6 rounded-lg shadow-lg col-span-full">
          <h3 class="text-lg font-semibold mb-4 text-indigo-700 dark:text-teal-400">Recent Activity</h3>
          <ul class="text-sm text-gray-700 dark:text-gray-300">
            <li class="mb-2">New order #1012 placed</li>
            <li class="mb-2">User