すべてのコンポーネント

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          FLASH SALE!
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        <p class="text-white text-lg md:text-2xl mb-4 font-semibold opacity-90">
          Limited Stock - Grab Yours Now!
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              <span class="font-bold">$99.99</span>
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              $49.99
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          Only <span class="font-bold text-yellow-300 dark:text-red-300">25%</span> of stock remaining!
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  <!-- Tailwind JIT compatibility for custom gradients and keyframes -->
  <style>
    @keyframes bounceX {
      0%, 100% { transform: translateX(0); }
      50% { transform: translateX(5px); }
    }
    @keyframes pulseY {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-3px); }
    }
    @keyframes fadeIn {
      0% { opacity: 0; }
      100% { opacity: 1; }
    }
    @keyframes fillBar {
      0% { width: 0%; }
      100% { width: 75%; /* Adjust based on stock */ }
    }
    @keyframes wiggle {
      0%, 100% { transform: rotate(-3deg); }
      50% { transform: rotate(3deg); }
    }
    @keyframes wobble {
      0%, 100% { transform: rotate(6deg); }
      50% { transform: rotate(-6deg); }
    }
    @keyframes scanlines {
      0% { background-position: 0% 0%; }
      100% { background-position: 0% 100%; }
    }
    @keyframes pulseSlight {
      0%, 100% { opacity: 0.8; }
      50% { opacity: 1; }
    }

    .animate-bounceX { animation: bounceX 3s infinite ease-in-out; }
    .animate-pulseY { animation: pulseY 2s infinite ease-in-out; }
    .animate-fadeIn { animation: fadeIn 1.5s forwards; }
    .animate-fillBar { animation: fillBar 2s forwards ease-out; }
    .animate-wiggle { animation: wiggle 2s infinite ease-in-out; }
    .animate-wobble { animation: wobble 4s infinite ease-in-out; }
    .animate-scanlines { animation: scanlines 10s linear infinite; }
    .animate-pulseSlight { animation: pulseSlight 3s infinite ease-in-out; }

    .bg-repeating-linear-gradient-\[0deg\,\#00000022_0px\,\#00000022_1px\,transparent_1px\,transparent_2px\] {
      background-image: repeating-linear-gradient(0deg, #00000022 0px, #00000022 1px, transparent 1px, transparent 2px);
    }
  </style>
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                <div class="min-h-screen bg-gray-200 dark:bg-gray-900 flex items-center justify-center p-4">
  <div class="bg-gray-200 dark:bg-gray-800 p-8 rounded-xl shadow-neumorphic-light dark:shadow-neumorphic-dark max-w-md w-full">
    <h2 class="text-2xl font-semibold text-gray-800 dark:text-gray-200 mb-6 text-center">Community Forum</h2>
    
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        <p class="font-medium text-gray-700 dark:text-gray-300">John Doe</p>
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      <p class="text-gray-600 dark:text-gray-400">"Looking for recommendations on the best ergonomic mouse for gaming!"</p>
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        <span>2 hours ago</span>
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        <p class="font-medium text-gray-700 dark:text-gray-300">Jane Smith</p>
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      <p class="text-gray-600 dark:text-gray-400">"Just received my order, the quality is amazing! Highly recommend this store."</p>
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        <span>1 day ago</span>
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<style>
  /* Neumorphism shadows - light mode */
  .shadow-neumorphic-light {
    box-shadow: 6px 6px 12px #b0b0b0, -6px -6px 12px #ffffff;
  }
  .shadow-neumorphic-inset-light {
    box-shadow: inset 5px 5px 10px #b0b0b0, inset -5px -5px 10px #ffffff;
  }

  /* Neumorphism shadows - dark mode */
  .dark .shadow-neumorphic-dark {
    box-shadow: 6px 6px 12px #333333, -6px -6px 12px #555555;
  }
  .dark .shadow-neumorphic-inset-dark {
    box-shadow: inset 5px 5px 10px #333333, inset -5px -5px 10px #555555;
  }

  /* Triadic color scheme roughly used with blue for accent */
  /* Main background/base: gray (adjusting with neumorphism) */
  /* Accent 1: blue (for buttons/links) */
  /* Accent 2 & 3 would naturally emerge from interactions/hover states or subtle text colors */
</style>
              

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  <h2 class="text-2xl font-bold text-black dark:text-white mb-4 border-b-2 border-black dark:border-gray-700 pb-2">Feedback</h2>
  <div class="mb-4">
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      <img src="https://www.randomuser.me/api/portraits/men/1.jpg" alt="Avatar" class="w-10 h-10 rounded-full border-2 border-black dark:border-gray-700 mr-4">
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      <p class="text-black dark:text-gray-300">"This article was incredibly insightful and well-written. I appreciate the clear explanations."</p>
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      <p class="font-bold text-black dark:text-white">Jane Smith</p>
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      <p class="text-black dark:text-gray-300">"I found a minor typo on page 3, but overall, a fantastic read!"</p>
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<div class="p-8 bg-gradient-to-br from-gray-200 to-gray-400 dark:from-gray-800 dark:to-gray-950 min-h-screen font-sans">

  <!-- Skeuomorphic Container for Table of Contents -->
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    <h1 class="text-4xl md:text-5xl font-extrabold text-gray-800 dark:text-gray-100 mb-8 text-center drop-shadow-md">
      <span class="bg-clip-text text-transparent bg-gradient-to-r from-red-600 via-blue-600 to-green-600 dark:from-red-400 dark:via-blue-400 dark:to-green-400">Table of Contents</span>
    </h1>

    <!-- Search Bar with Skeuomorphic Input -->
    <div class="mb-8 relative">
      <input type="text" placeholder="Search topics..." class="w-full py-3 pl-12 pr-6 rounded-full bg-gray-100 dark:bg-gray-800 text-gray-800 dark:text-gray-200 text-lg shadow-[inset_0_2px_4px_rgba(0,0,0,0.1),0_1px_0_rgba(255,255,255,0.8)] dark:shadow-[inset_0_2px_4px_rgba(255,255,255,0.1),0_1px_0_rgba(0,0,0,0.5)] focus:outline-none focus:ring-4 focus:ring-red-400 dark:focus:ring-red-600 transition duration-300">
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    <!-- Table of Contents List -->
    <ul class="space-y-4 md:space-y-6">

      <!-- Section 1 -->
      <li class="relative group">
        <a href="#section1" class="block w-full py-4 px-6 rounded-2xl bg-gradient-to-br from-gray-200 to-gray-300 dark:from-gray-800 dark:to-gray-900 text-gray-800 dark:text-gray-200 text-xl font-semibold shadow-[0_4px_8px_rgba(0,0,0,0.1),inset_0_-2px_4px_rgba(0,0,0,0.1)] dark:shadow-[0_4px_8px_rgba(0,0,0,0.3),inset_0_-2px_4px_rgba(255,255,255,0.1)] hover:shadow-[0_6px_12px_rgba(0,0,0,0.2),inset_0_-3px_6px_rgba(0,0,0,0.15)] dark:hover:shadow-[0_6px_12px_rgba(0,0,0,0.4),inset_0_-3px_6px_rgba(255,255,255,0.15)] transition-all duration-300 transform hover:-translate-y-1 border-t border-l border-gray-100 dark:border-gray-700
        flex items-center justify-between">
          <span>1. Introduction to Social Media</span>
          <svg class="w-6 h-6 text-red-500 dark:text-red-400 transform group-hover:rotate-90 transition-transform duration-300" 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="M9 5l7 7-7 7"></path></svg>
        </a>
        <!-- Nested Sub-sections -->
        <ul class="ml-8 mt-3 space-y-2 border-l-4 border-red-500 dark:border-red-600 pl-4 py-2 opacity-0 max-h-0 group-hover:opacity-100 group-hover:max-h-screen transition-all duration-500 ease-in-out overflow-hidden">
          <li><a href="#section1.1" class="block py-2 text-gray-700 dark:text-gray-300 hover:text-red-500 dark:hover:text-red-400 transition-colors duration-200 text-lg relative before:content-['-'] before:absolute before:-left-4 before:text-red-500 dark:before:text-red-400">1.1 What is Social Media?</a></li>
          <li><a href="#section1.2" class="block py-2 text-gray-700 dark:text-gray-300 hover:text-blue-500 dark:hover:text-blue-400 transition-colors duration-200 text-lg relative before:content-['-'] before:absolute before:-left-4 before:text-blue-500 dark:before:text-blue-400">1.2 History and Evolution</a></li>
        </ul>
      </li>

      <!-- Section 2 -->
      <li class="relative group">
        <a href="#section2" class="block w-full py-4 px-6 rounded-2xl bg-gradient-to-br from-gray-200 to-gray-300 dark:from-gray-800 dark:to-gray-900 text-gray-800 dark:text-gray-200 text-xl font-semibold shadow-[0_4px_8px_rgba(0,0,0,0.1),inset_0_-2px_4px_rgba(0,0,0,0.1)] dark:shadow-[0_4px_8px_rgba(0,0,0,0.3),inset_0_-2px_4px_rgba(255,255,255,0.1)] hover:shadow-[0_6px_12px_rgba(0,0,0,0.2),inset_0_-3px_6px_rgba(0,0,0,0.15)] dark:hover:shadow-[0_6px_12px_rgba(0,0,0,0.4),inset_0_-3px_6px_rgba(255,255,255,0.15)] transition-all duration-300 transform hover:-translate-y-1 border-t border-l border-gray-100 dark:border-gray-700
        flex items-center justify-between">
          <span>2. Key Social Media Platforms</span>
          <svg class="w-6 h-6 text-blue-500 dark:text-blue-400 transform group-hover:rotate-90 transition-transform duration-300" 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="M9 5l7 7-7 7"></path></svg>
        </a>
        <!-- Nested Sub-sections -->
        <ul class="ml-8 mt-3 space-y-2 border-l-4 border-blue-500 dark:border-blue-600 pl-4 py-2 opacity-0 max-h-0 group-hover:opacity-100 group-hover:max-h-screen transition-all duration-500 ease-in-out overflow-hidden">
          <li><a href="#section2.1" class="block py-2 text-gray-700 dark:text-gray-300 hover:text-red-500 dark:hover:text-red-400 transition-colors duration-200 text-lg relative before:content-['-'] before:absolute before:-left-4 before:text-red-500 dark:before:text-red-400">2.1 Facebook & Instagram</a></li>
          <li><a href="#section2.2" class="block py-2 text-gray-700 dark:text-gray-300 hover:text-blue-500 dark:hover:text-blue-400 transition-colors duration-200 text-lg relative before:content-['-'] before:absolute before:-left-4 before:text-blue-500 dark:before:text-blue-400">2.2 Twitter & LinkedIn</a></li>
          <li><a href="#section2.3" class="block py-2 text-gray-700 dark:text-gray-300 hover:text-green-500 dark:hover:text-green-400 transition-colors duration-200 text-lg relative before:content-['-'] before:absolute before:-left-4 before:text-green-500 dark:before:text-green-400">2.3 TikTok & Snapchat</a></li>
        </ul>
      </li>

      <!-- Section 3 -->
      <li class="relative group">
        <a href="#section3" class="block w-full py-4 px-6 rounded-2xl bg-gradient-to-br from-gray-200 to-gray-300 dark:from-gray-800 dark:to-gray-900 text-gray-800 dark:text-gray-200 text-xl font-semibold shadow-[0_4px_8px_rgba(0,0,0,0.1),inset_0_-2px_4px_rgba(0,0,0,0.1)] dark:shadow-[0_4px_8px_rgba(0,0,0,0.3),inset_0_-2px_4px_rgba(255,255,255,0.1)] hover:shadow-[0_6px_12px_rgba(0,0,0,0.2),inset_0_-3px_6px_rgba(0,0,0,0.15)] dark:hover:shadow-[0_6px_12px_rgba(0,0,0,0.4),inset_0_-3px_6px_rgba(255,255,255,0.15)] transition-all duration-300 transform hover:-translate-y-1 border-t border-l border-gray-100 dark:border-gray-700
        flex items-center justify-between">
          <span>3. Social Media Strategy</span>
          <svg class="w-6 h-6 text-green-500 dark:text-green-400 transform group-hover:rotate-90 transition-transform duration-300" 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="M9 5l7 7-7 7"></path></svg>
        </a>
        <!-- Nested Sub-sections -->
        <ul class="ml-8 mt-3 space-y-2 border-l-4 border-green-500 dark:border-green-600 pl-4 py-2 opacity-0 max-h-0 group-hover:opacity-100 group-hover:max-h-screen transition-all duration-500 ease-in-out overflow-hidden">
          <li><a href="#section3.1" class="block py-2 text-gray-700 dark:text-gray-300 hover:text-red-500 dark:hover:text-red-400 transition-colors duration-200 text-lg relative before:content-['-'] before:absolute before:-left-4 before:text-red-500 dark:before:text-red-400">3.1 Content Creation</a></li>
          <li><a href="#section3.2" class="block py-2 text-gray-700 dark:text-gray-300 hover:text-blue-500 dark:hover:text-blue-400 transition-colors duration-200 text-lg relative before:content-['-'] before:absolute before:-left-4 before:text-blue-500 dark:before:text-blue-400">3.2 Audience Engagement</a></li>
          <li><a href="#section3.3" class="block py-2 text-gray-700 dark:text-gray-300 hover:text-green-500 dark:hover:text-green-400 transition-colors duration-200 text-lg relative before:content-['-'] before:absolute before:-left-4 before:text-green-500 dark:before:text-green-400">3.3 Analytics & KPIs</a></li>
        </ul>
      </li>

      <!-- Section 4 -->
      <li class="relative group">
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        flex items-center justify-between">
          <span>4. Future of Social Media</span>
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          <li><a href="#section4.1" class="block py-2 text-gray-700 dark:text-gray-300 hover:text-red-500 dark:hover:text-red-400 transition-colors duration-200 text-lg relative before:content-['-'] before:absolute before:-left-4 before:text-red-500 dark:before:text-red-400">4.1 Emerging Trends</a></li>
          <li><a href="#section4.2" class="block py-2 text-gray-700 dark:text-gray-300 hover:text-blue-500 dark:hover:text-blue-400 transition-colors duration-200 text-lg relative before:content-['-'] before:absolute before:-left-4 before:text-blue-500 dark:before:text-blue-400">4.2 Metaverse & Web3</a></li>
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                        <h3 class="text-xl font-semibold text-gray-900 dark:text-white mb-2">Adventure Backpack</h3>
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                        <h3 class="text-xl font-semibold text-gray-900 dark:text-white mb-2">Wireless Noise-Cancelling Headphones</h3>
                        <p class="text-gray-600 dark:text-gray-400 text-sm mb-3">Immersive sound experience with comfort.</p>
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                        <h3 class="text-xl font-semibold text-gray-900 dark:text-white mb-2">Vintage Leather Journal</h3>
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<style>
    /* Basic 3D transform utilities */
    .perspective-1000 {
        perspective: 1000px;
    }
    .rotateY-5 {
        transform: rotateY(5deg);
    }
    .translateZ-20 {
        transform: translateZ(20px);
    }
    .shadow-text-sm {
        text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
    }

    /* Keyframe Animations */
    @keyframes fade-in-down {
        from {
            opacity: 0;
            transform: translateY(-20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    @keyframes fade-in-up {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .animate-fade-in-down {
        animation: fade-in-down 0.6s ease-out forwards;
    }

    .animate-fade-in-up {
        animation: fade-in-up 0.6s ease-out forwards;
    }

    /* Custom shadow for 3D effect on buttons */
    .shadow-lg {
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05),
                    0 2px 4px -1px rgba(0, 0, 0, 0.03)
                    /* inset 0 0 0 1px rgba(255, 255, 255, 0.1) for subtle inner highlight */;
    }
    .dark .shadow-lg {
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.15),
                    0 2px 4px -1px rgba(0, 0, 0, 0.1);
    }

    .perspective-800 {
        perspective: 800px;
    }

    .transform-style-preserve-3d {
        transform-style: preserve-3d;
    }

    /* This is a common way to emulate 3d effects by creating a subtle layer behind */
    .relative .absolute {
        backface-visibility: hidden;
    }

     /* Additional subtle 3D effects for inner elements */
    .inner-element-3d {
        transform: translateZ(10px) rotateX(2deg);
        transition: transform 0.3s ease-out;
    }
    .hover\:inner-element-3d\:hover:translateZ-15 {
        transform: translateZ(15px) rotateX(0deg);
    }
</style>
              

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</div>

<style>
  .shadow-neumorphic-light {
    box-shadow: 8px 8px 16px #a3b1c6, -8px -8px 16px #ffffff;
  }

  .dark .shadow-neumorphic-dark {
    box-shadow: 8px 8px 16px #4d4d4d, -8px -8px 16px #333333;
  }

  .shadow-neumorphic-pressed-light {
    box-shadow: inset 6px 6px 12px #a3b1c6, inset -6px -6px 12px #ffffff;
  }

  .dark .shadow-neumorphic-pressed-dark {
    box-shadow: inset 6px 6px 12px #4d4d4d, inset -6px -6px 12px #333333;
  }
</style>