<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Explore cutting-edge web technologies in 2025 with Quantum Web.">
    <meta name="author" content="Future Web Developer">
    <!-- Open Graph for social sharing -->
    <meta property="og:title" content="Quantum Web 2025">
    <meta property="og:description" content="A glimpse into the future of web tech with AI and immersive experiences.">
    <meta property="og:type" content="website">
    <title>Quantum Web 2025</title>

    <!-- Preload critical resources -->
    <link rel="preload" href="style.css" as="style">
    <link rel="preload" href="main.js" as="script">
    <link rel="icon" href="icon.webp" type="image/webp">

    <!-- Core Styles and Scripts -->
    <link rel="stylesheet" href="style.css">
    <script type="module" src="main.js" defer></script>

    <!-- Experimental Features for 2025 -->
    <link rel="stylesheet" href="advanced-ui.css" id="ui-style">
    <script src="ai-enhancements.js" defer></script>
    <meta name="ai-support" content="experimental">
</head>
<body>
    <header role="banner">
        <h1>Welcome to Quantum Web 2025</h1>
        <nav role="navigation" aria-label="Main navigation">
            <ul>
                <li><a href="#home" aria-label="Go to Home">Home</a></li>
                <li><a href="#services" aria-label="Go to Services">Services</a></li>
                <li><a href="#about" aria-label="Go to About">About</a></li>
                <li><a href="#contact" aria-label="Go to Contact">Contact</a></li>
            </ul>
        </nav>
    </header>

    <main role="main">
        <section id="intro" aria-labelledby="intro-heading">
            <h2 id="intro-heading">The Web in 2025</h2>
            <p>Experience emerging AI-driven personalization and early immersive web technologies.</p>
            <button id="activateAI" aria-label="Activate AI Features">Activate AI Features</button>
        </section>

        <!-- Early WebXR Integration -->
        <section id="xr-experience" aria-labelledby="xr-heading">
            <h3 id="xr-heading">Immersive Web Preview</h3>
            <p>Try an experimental WebXR experience (requires compatible devices).</p>
            <div id="xr-container" aria-label="WebXR Experience"></div>
            <button id="startXR" aria-label="Start WebXR">Start XR</button>
        </section>

        <!-- AI-Driven Content -->
        <section id="ai-content" aria-labelledby="ai-content-heading">
            <h3 id="ai-content-heading">AI-Enhanced Content</h3>
            <div id="ai-output" aria-live="polite"></div>
            <button id="generateContent" aria-label="Generate AI Content">Generate Content</button>
        </section>

        <!-- Blockchain Authentication (Emerging in 2025) -->
        <section id="blockchain-auth" aria-labelledby="blockchain-heading">
            <h3 id="blockchain-heading">Blockchain Login</h3>
            <p>Sign in securely with decentralized authentication (beta).</p>
            <button id="blockchainLogin" aria-label="Login with Blockchain">Login</button>
        </section>
    </main>

    <footer role="contentinfo">
        <p>© 2025 Quantum Web. All Rights Reserved.</p>
        <button id="toggleDarkMode" aria-label="Toggle Dark Mode">Toggle Dark Mode</button>
    </footer>

    <!-- JavaScript for 2025 Features -->
    <script type="module">
        // Event Listeners
        const activateAIButton = document.getElementById('activateAI');
        const generateContentButton = document.getElementById('generateContent');
        const startXRButton = document.getElementById('startXR');
        const blockchainLoginButton = document.getElementById('blockchainLogin');
        const darkModeButton = document.getElementById('toggleDarkMode');

        activateAIButton.addEventListener('click', activateAI);
        generateContentButton.addEventListener('click', generateAIContent);
        startXRButton.addEventListener('click', startWebXR);
        blockchainLoginButton.addEventListener('click', blockchainAuth);
        darkModeButton.addEventListener('click', toggleDarkMode);

        // AI Activation
        function activateAI() {
            const aiOutput = document.getElementById('ai-output');
            aiOutput.textContent = 'AI features activated. Generating content...';
            // 2025: Basic AI integration via API call possible
        }

        // AI Content Generation
        function generateAIContent() {
            const aiOutput = document.getElementById('ai-output');
            aiOutput.textContent = 'Here’s some AI-generated content for you!';
            // 2025: Could connect to a real AI API like xAI's
        }

        // WebXR (Experimental in 2025)
        async function startWebXR() {
            const xrContainer = document.getElementById('xr-container');
            if (navigator.xr) {
                xrContainer.textContent = 'Starting WebXR session...';
                // 2025: Early WebXR support with basic rendering
                try {
                    const session = await navigator.xr.requestSession('immersive-vr');
                    xrContainer.textContent = 'WebXR session active!';
                } catch (e) {
                    xrContainer.textContent = 'WebXR not supported or failed to start.';
                }
            } else {
                xrContainer.textContent = 'WebXR not supported in your browser.';
            }
        }

        // Blockchain Authentication (Placeholder)
        function blockchainAuth() {
            alert('Blockchain login initiated (beta feature).');
            // 2025: Likely a wallet connection like MetaMask
        }

        // Dark Mode Toggle
        function toggleDarkMode() {
            document.body.classList.toggle('dark-mode');
            localStorage.setItem('darkMode', document.body.classList.contains('dark-mode'));
        }

        // Initialize
        window.addEventListener('DOMContentLoaded', () => {
            if (localStorage.getItem('darkMode') === 'true') document.body.classList.add('dark-mode');
        });
    </script>
</body>
</html>