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<!DOCTYPE html>
<html lang="tr">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Flux Browser</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap" rel="stylesheet">
    <style>
        body {
            font-family: 'Inter', sans-serif;
            background-color: #0f172a; /* Slate 900 */
            overflow: hidden; /* Prevent body scroll, handle in app */
            user-select: none; /* App-like feel */
        }

        /* Custom Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: transparent;
        }
        ::-webkit-scrollbar-thumb {
            background: #334155;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #475569;
        }

        /* Glassmorphism Utilities */
        .glass {
            background: rgba(30, 41, 59, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .glass-panel {
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
        }

        /* Tab Animations */
        .tab-item {
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .tab-item.active {
            background: rgba(255, 255, 255, 0.1);
        }
        .tab-item:hover:not(.active) {
            background: rgba(255, 255, 255, 0.05);
        }

        /* Address Bar Focus */
        .address-bar:focus-within {
            background: rgba(30, 41, 59, 0.9);
            box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.5);
        }

        /* Content Fade In */
        .fade-in {
            animation: fadeIn 0.4s ease-out forwards;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Loader */
        .loader {
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, #38bdf8, transparent);
            background-size: 200% 100%;
            animation: loading 1.5s infinite linear;
            position: absolute;
            top: 0;
            left: 0;
            z-index: 50;
            display: none;
        }
        @keyframes loading {
            0% { background-position: 100% 0; }
            100% { background-position: -100% 0; }
        }

        /* Hide default scrollbar for clean look in webviews if we were using iframes, 
           but here we simulate content */
        .content-area {
            height: calc(100vh - 85px);
            overflow-y: auto;
            position: relative;
        }
    </style>
</head>
<body class="text-slate-200 h-screen flex flex-col">

    <!-- Loading Bar -->
    <div id="page-loader" class="loader"></div>

    <!-- Title Bar / Header -->
    <header class="glass h-[40px] flex items-center justify-between px-4 draggable">
        <div class="flex items-center space-x-4 opacity-50 text-xs font-medium tracking-wide">
            <span>Flux Browser</span>
        </div>
        <div class="flex items-center space-x-2">
            <div class="w-3 h-3 rounded-full bg-red-500/80 hover:bg-red-500 transition-colors cursor-pointer"></div>
            <div class="w-3 h-3 rounded-full bg-yellow-500/80 hover:bg-yellow-500 transition-colors cursor-pointer"></div>
            <div class="w-3 h-3 rounded-full bg-green-500/80 hover:bg-green-500 transition-colors cursor-pointer"></div>
        </div>
    </header>

    <!-- Toolbar & Tabs Container -->
    <div class="flex flex-col bg-slate-900/80 border-b border-slate-800">
        
        <!-- Tabs Row -->
        <div class="flex items-center px-2 pt-2 space-x-1 overflow-x-auto no-scrollbar" id="tabs-container">
            <!-- Tabs injected via JS -->
            <button onclick="app.newTab()" class="p-1.5 rounded-md hover:bg-slate-700 text-slate-400 hover:text-white transition-colors ml-2" title="Yeni Sekme">
                <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4v16m8-8H4" />
                </svg>
            </button>
        </div>

        <!-- Navigation Row -->
        <div class="flex items-center px-3 py-2 space-x-3">
            <!-- Nav Controls -->
            <div class="flex items-center space-x-1 text-slate-400">
                <button onclick="app.goBack()" class="p-1.5 rounded-full hover:bg-slate-800 hover:text-white transition-colors disabled:opacity-30" id="btn-back">
                    <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7" />
                    </svg>
                </button>
                <button onclick="app.goForward()" class="p-1.5 rounded-full hover:bg-slate-800 hover:text-white transition-colors disabled:opacity-30" id="btn-forward">
                    <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7" />
                    </svg>
                </button>
                <button onclick="app.refresh()" class="p-1.5 rounded-full hover:bg-slate-800 hover:text-white transition-colors">
                    <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
                    </svg>
                </button>
            </div>

            <!-- Address Bar -->
            <div class="flex-1 address-bar bg-slate-800/50 rounded-lg flex items-center px-3 py-1.5 transition-all border border-transparent focus-within:border-sky-500/50">
                <div class="text-slate-500 mr-2">
                    <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" id="security-icon">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z" />
                    </svg>
                </div>
                <input type="text" id="url-input" class="bg-transparent border-none outline-none text-sm text-slate-200 w-full font-light placeholder-slate-500" placeholder="Ara veya adres gir" autocomplete="off">
                <div class="text-slate-500 hover:text-slate-300 cursor-pointer">
                    <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 12h.01M12 12h.01M19 12h.01M6 12a1 1 0 11-2 0 1 1 0 012 0zm7 0a1 1 0 11-2 0 1 1 0 012 0zm7 0a1 1 0 11-2 0 1 1 0 012 0z" />
                    </svg>
                </div>
            </div>

            <!-- Extensions/Profile -->
            <div class="flex items-center space-x-2 text-slate-400">
                <button class="p-1.5 rounded-full hover:bg-slate-800 hover:text-white transition-colors relative">
                    <div class="absolute top-1.5 right-1.5 w-2 h-2 bg-red-500 rounded-full border-2 border-slate-900"></div>
                    <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M20 13V6a2 2 0 00-2-2H6a2 2 0 00-2 2v7m16 0v5a2 2 0 01-2 2H6a2 2 0 01-2-2v-5m16 0h-2.586a1 1 0 00-.707.293l-2.414 2.414a1 1 0 01-.707.293h-3.172a1 1 0 01-.707-.293l-2.414-2.414A1 1 0 006.586 13H4" />
                    </svg>
                </button>
                <button class="w-8 h-8 rounded-full bg-gradient-to-br from-purple-500 to-blue-500 text-white flex items-center justify-center text-xs font-bold shadow-lg hover:scale-105 transition-transform">
                    A
                </button>
            </div>
        </div>
    </div>

    <!-- Main Content Area -->
    <main id="main-view" class="flex-1 bg-slate-900 relative overflow-hidden">
        <!-- Content injected via JS -->
    </main>

    <!-- Footer Status Bar -->
    <footer class="h-6 bg-slate-900 border-t border-slate-800 flex items-center justify-between px-3 text-[10px] text-slate-500 select-none">
        <div class="flex items-center space-x-3">
            <span id="status-text">Bağlantı güvenli</span>
        </div>
        <div class="flex items-center space-x-3">
            <span>Flux v2.4.0</span>
            <span class="flex items-center gap-1"><div class="w-1.5 h-1.5 rounded-full bg-green-500"></div> 12ms</span>
        </div>
    </footer>

    <!-- JavaScript Application Logic -->
    <script>
        /**
         * Flux Browser Core Logic
         * Simulates a browser environment using DOM manipulation.
         */
        const app = (() => {
            // State
            let tabs = [];
            let activeTabId = null;
            let tabCounter = 0;

            // DOM Elements
            const els = {
                tabsContainer: document.getElementById('tabs-container'),
                mainView: document.getElementById('main-view'),
                urlInput: document.getElementById('url-input'),
                loader: document.getElementById('page-loader'),
                btnBack: document.getElementById('btn-back'),
                btnForward: document.getElementById('btn-forward'),
                statusText: document.getElementById('status-text')
            };

            // Mock Data for Simulation
            const mockData = {
                'google.com': {
                    title: 'Google',
                    content: `
                        <div class="flex flex-col items-center justify-center h-full w-full bg-[#202124] text-white">
                            <div class="mb-8 text-6xl font-medium tracking-tighter bg-clip-text text-transparent bg-gradient-to-r from-blue-400 via-red-400 to-yellow-400">Google</div>
                            <div class="w-full max-w-xl relative">
                                <div class="absolute inset-y-0 left-0 pl-4 flex items-center pointer-events-none">
                                    <svg class="h-5 w-5 text-gray-400" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z" /></svg>
                                </div>
                                <input type="text" class="w-full bg-[#303134] border border-[#5f6368] rounded-full py-3 pl-12 pr-12 text-white focus:outline-none focus:border-[#8ab4f8] shadow-lg" placeholder="Google'da arama yapın veya bir URL yazın">
                                <div class="absolute inset-y-0 right-0 pr-4 flex items-center">
                                    <svg class="h-5 w-5 text-gray-400" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 11a7 7 0 01-7 7m0 0a7 7 0 01-7-7m7 7v4m0 0H8m4 0h4m-4-8a3 3 0 01-3-3V5a3 3 0 116 0v6a3 3 0 01-3 3z" /></svg>
                                </div>
                            </div>
                            <div class="mt-8 flex space-x-4">
                                <button class="bg-[#303134] border border-[#303134] hover:border-[#5f6368] px-4 py-2 rounded text-sm text-[#e8eaed]">Google'da Ara</button>
                                <button class="bg-[#303134] border border-[#303134] hover:border-[#5f6368] px-4 py-2 rounded text-sm text-[#e8eaed]">Kendimi Şanslı Hissediyorum</button>
                            </div>
                            <div class="mt-8 text-sm text-[#9aa0a6]">Google'ı kullanabileceğiniz diğer diller: <a href="#" class="text-[#8ab4f8] hover:underline">English</a></div>
                        </div>
                    `
                },
                'github.com': {
                    title: 'GitHub',
                    content: `
                        <div class="flex flex-col h-full w-full bg-[#0d1117] text-[#c9d1d9] overflow-y-auto">
                            <div class="border-b border-[#30363d] bg-[#161b22] px-8 py-4 flex items-center justify-between">
                                <div class="flex items-center space-x-4">
                                    <svg height="32" aria-hidden="true" viewBox="0 0 16 16" version="1.1" width="32" data-view-component="true" fill="white">
                                        <path d="M8 0c4.42 0 8 3.58 8 8a8.013 8.013 0 0 1-5.45 7.59c-.4.08-.55-.17-.55-.38 0-.27.01-1.13.01-2.2 0-.75-.25-1.23-.54-1.48 1.78-.2 3.65-.88 3.65-3.95 0-.88-.31-1.59-.82-2.15.08-.2.36-1.02-.08-2.12 0 0-.67-.22-2.2.82-.64-.18-1.32-.27-2-.27-.68 0-1.36.09-2 .27-1.53-1.03-2.2-.82-2.2-.82-.44 1.1-.16 1.92-.08 2.12-.51.56-.82 1.28-.82 2.15 0 3.06 1.86 3.75 3.64 3.95-.23.2-.44.55-.51 1.07-.46.21-1.61.55-2.33-.66-.15-.24-.6-.83-1.23-.82-.67.01-.27.38.01.53.34.19.73.9.82 1.13.16.45.68 1.31 2.69.94 0 .67.01 1.3.01 1.49 0 .21-.15.45-.55.38A7.995 7.995 0 0 1 0 8c0-4.42 3.58-8 8-8Z"></path>
                                    </svg>
                                    <input type="text" class="bg-[#0d1117] border border-[#30363d] rounded-md px-3 py-1 text-sm w-64 text-slate-300 focus:border-blue-500 focus:outline-none" placeholder="Search or jump to...">
                                </div>
                                <div class="flex items-center space-x-4 text-sm font-semibold">
                                    <a href="#" class="hover:text-slate-300">Pull requests</a>
                                    <a href="#" class="hover:text-slate-300">Issues</a>
                                    <a href="#" class="hover:text-slate-300">Codespaces</a>
                                    <a href="#" class="hover:text-slate-300">Marketplace</a>
                                    <a href="#" class="hover:text-slate-300">Explore</a>
                                </div>
                            </div>
                            <div class="max-w-6xl mx-auto w-full mt-8 px-4">
                                <div class="flex items-center justify-between mb-6">
                                    <h2 class="text-xl font-normal">Home</h2>
                                    <div class="flex space-x-2">
                                        <button class="bg-[#21262d] border border-[#30363d] hover:border-[#8b949e] text-[#c9d1d9] px-3 py-1 rounded-md text-xs font-medium">Send feedback</button>
                                    </div>
                                </div>
                                <div class="grid grid-cols-3 gap-4">
                                    <div class="col-span-2 space-y-4">
                                        <div class="border border-[#30363d] rounded-md p-4 bg-[#161b22]">
                                            <div class="flex items-center mb-2">
                                                <div class="w-8 h-8 rounded-full bg-gradient-to-r from-blue-400 to-emerald-400 mr-2"></div>
                                                <div>
                                                    <div class="text-sm font-semibold">akhaliq <span class="font-normal text-slate-400">created a repository</span></div>
                                                    <div class="text-xs text-slate-500">2 hours ago</div>
                                                </div>
                                            </div>
                                            <div class="border border-[#30363d] rounded p-3 bg-[#0d1117]">
                                                <div class="font-bold text-blue-400 text-sm">akhaliq/anycoder</div>
                                                <div class="text-xs text-slate-400 mt-1">AI powered coding assistant</div>
                                                <div class="flex items-center mt-3 space-x-4 text-xs text-slate-500">
                                                    <span class="flex items-center"><span class="w-2 h-2 rounded-full bg-yellow-400 mr-1"></span> Python</span>
                                                    <span>⭐ 1.2k</span>
                                                </div>
                                            </div>
                                        </div>
                                    </div>
                                    <div class="col-span-1">
                                        <div class="border border-[#30363d] rounded-md p-4 bg-[#161b22]">
                                            <h3 class="text-sm font-semibold mb-3">Latest changes</h3>
                                            <ul class="text-xs space-y-3 text-slate-400">
                                                <li>3 hours ago — GitHub Actions: New runner images</li>
                                                <li>5 hours ago — Security Advisory: Critical patch</li>
                                            </ul>
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>
                    `
                },
                'youtube.com': {
                    title: 'YouTube',
                    content: `
                        <div class="flex h-full w-full bg-[#0f0f0f] text-white overflow-hidden">
                            <div class="w-20 flex flex-col items-center py-4 space-y-6 bg-[#0f0f0f]">
                                <div class="flex flex-col items-center cursor-pointer group">
                                    <svg class="w-6 h-6 mb-1 text-white" fill="currentColor" viewBox="0 0 24 24"><path d="M10 20v-6h4v6h5v-8h3L12 3 2 12h3v8z"/></svg>
                                    <span class="text-[10px] group-hover:text-white text-slate-400">Ana Sayfa</span>
                                </div>
                                <div class="flex flex-col items-center cursor-pointer group">
                                    <svg class="w-6 h-6 mb-1 text-slate-400 group-hover:text-white" fill="currentColor" viewBox="0 0 24 24"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1 17.93c-3.95-.49-7-3.85-7-7.93 0-.62.08-1.21.21-1.79L9 15v1c0 1.1.9 2 2 2v1.93zm6.9-2.54c-.26-.81-1-1.39-1.9-1.39h-1v-3c0-.55-.45-1-1-1H8v-2h2c.55 0 1-.45 1-1V7h2c1.1 0 2-.9 2-2v-.41c2.93 1.19 5 4.06 5 7.41 0 2.08-.8 3.97-2.1 5.39z"/></svg>
                                    <span class="text-[10px] group-hover:text-white text-slate-400">Keşfet</span>
                                </div>
                                <div class="flex flex-col items-center cursor-pointer group">
                                    <svg class="w-6 h-6 mb-1 text-slate-400 group-hover:text-white" fill="currentColor" viewBox="0 0 24 24"><path d="M12 3v10.55c-.59-.34-1.27-.55-2-.55-2.21 0-4 1.79-4 4s1.79 4 4 4 4-1.79 4-4V7h4V3h-6z"/></svg>
                                    <span class="text-[10px] group-hover:text-white text-slate-400">Shorts</span>
                                </div>
                            </div>
                            <div class="flex-1 overflow-y-auto p-6">
                                <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-4">
                                    ${Array(8).fill(0).map((_, i) => `
                                        <div class="flex flex-col cursor-pointer group">
                                            <div class="aspect-video bg-slate-800 rounded-xl overflow-hidden relative mb-2">
                                                <img src="https://picsum.photos/seed/${i+10}/400/225" class="w-full h-full object-cover group-hover:scale-105 transition-transform duration-300">
                                                <div class="absolute bottom-1 right-1 bg-black/80 text-xs px-1 rounded">10:0${i}</div>
                                            </div>
                                            <div class="flex space-x-3">
                                                <div class="w-9 h-9 rounded-full bg-slate-700 overflow-hidden flex-shrink-0">
                                                    <img src="https://picsum.photos/seed/${i+20}/100/100" class="w-full h-full">
                                                </div>
                                                <div>
                                                    <h3 class="text-sm font-semibold text-white leading-tight mb-1 line-clamp-2">Harika Bir Video Başlığı #${i+1} - Flux Browser Demo</h3>
                                                    <div class="text-xs text-slate-400">Kanal Adı</div>
                                                    <div class="text-xs text-slate-400">1${i}B görüntüleme • 1 gün önce</div>
                                                </div>
                                            </div>
                                        </div>
                                    `).join('')}
                                </div>
                            </div>
                        </div>
                    `
                },
                'weather.com': {
                    title: 'Hava Durumu',
                    content: `
                        <div class="h-full w-full bg-gradient-to-br from-blue-400 to-blue-600 text-white p-8 overflow-y-auto">
                            <div class="max-w-4xl mx-auto">
                                <div class="flex justify-between items-end mb-8">
                                    <div>
                                        <h1 class="text-4xl font-light">İstanbul</h1>
                                        <p class="text-blue-100">Salı 14:30</p>
                                    </div>
                                    <div class="text-right">
                                        <div class="text-6xl font-light">24°</div>
                                        <div class="text-xl">Parçalı Bulutlu</div>
                                    </div>
                                </div>
                                
                                <div class="bg-white/20 backdrop-blur-md rounded-2xl p-6 mb-6 shadow-lg">
                                    <h3 class="text-sm font-semibold mb-4 uppercase tracking-wider text-blue-50">Saatlik Tahmin</h3>
                                    <div class="flex justify-between overflow-x-auto pb-2 space-x-8">
                                        ${['14:00', '15:00', '16:00', '17:00', '18:00', '19:00'].map(t => `
                                            <div class="flex flex-col items-center min-w-[40px]">
                                                <span class="text-sm mb-2">${t}</span>
                                                <svg class="w-6 h-6 mb-2" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 3v1m0 16v1m9-9h-1M4 12H3m15.364 6.364l-.707-.707M6.343 6.343l-.707-.707m12.728 0l-.707.707M6.343 17.657l-.707.707M16 12a4 4 0 11-8 0 4 4 0 018 0z"></path></svg>
                                                <span class="font-bold">${Math.floor(Math.random() * 5) + 22}°</span>
                                            </div>
                                        `).join('')}
                                    </div>
                                </div>

                                <div class="grid grid-cols-2 gap-4">
                                    <div class="bg-white/20 backdrop-blur-md rounded-2xl p-4">
                                        <div class="text-sm text-blue-100 mb-1">Nem</div>
                                        <div class="text-2xl font-semibold">%65</div>
                                    </div>
                                    <div class="bg-white/20 backdrop-blur-md rounded-2xl p-4">
                                        <div class="text-sm text-blue-100 mb-1">Rüzgar</div>
                                        <div class="text-2xl font-semibold">12 km/s</div>
                                    </div>
                                </div>
                            </div>
                        </div>
                    `
                }
            };

            // --- Core Functions ---

            function init() {
                // Event Listeners
                els.urlInput.addEventListener('keydown', (e) => {
                    if (e.key === 'Enter') {
                        navigateTo(els.urlInput.value);
                    }
                });

                // Start with a new tab
                newTab();
            }

            function createTabElement(tab) {
                const div = document.createElement('div');
                div.className = `tab-item group flex items-center max-w-[200px] min-w-[140px] h-8 px-3 rounded-t-lg cursor-pointer border-t border-l border-r border-transparent relative ${tab.id === activeTabId ? 'active border-slate-700 bg-slate-800' : 'hover:bg-slate-800/50'}`;
                div.onclick = (e) => {
                    if(!e.target.closest('.close-btn')) switchTab(tab.id);
                };

                // Favicon (simulated with a colored circle)
                const faviconColor = tab.url.includes('google') ? 'bg-blue-500' : 
                                     tab.url.includes('github') ? 'bg-gray-200' : 
                                     tab.url.includes('youtube') ? 'bg-red-600' : 'bg-slate-500';
                
                const favicon = `<div class="w-3 h-3 rounded-full ${faviconColor} mr-2 flex-shrink-0"></div>`;
                
                const title = `<span class="truncate text-xs flex-1 text-slate-300 group-hover:text-slate-200">${tab.title}</span>`;
                
                const closeBtn = `
                    <button onclick="app.closeTab(${tab.id})" class="close-btn ml-2 p-0.5 rounded-full hover:bg-slate-600 text-slate-500 hover:text-white opacity-0 group-hover:opacity-100 transition-opacity">
                        <svg class="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="3" d="M6 18L18 6M6 6l12 12"></path></svg>
                    </button>
                `;

                div.innerHTML = favicon + title + closeBtn;
                return div;
            }

            function renderTabs() {
                // Clear current tabs (except the + button which is last)
                const addBtn = els.tabsContainer.lastElementChild;
                els.tabsContainer.innerHTML = '';
                
                tabs.forEach(tab => {
                    els.tabsContainer.appendChild(createTabElement(tab));
                });
                
                els.tabsContainer.appendChild(addBtn);
            }

            function renderContent() {
                const tab = tabs.find(t => t.id === activeTabId);
                if (!tab) return;

                // Show loader
                els.loader.style.display = 'block';
                els.statusText.innerText = `Bağlanılıyor... ${tab.url}`;
                
                // Simulate network delay
                setTimeout(() => {
                    els.loader.style.display = 'none';
                    els.statusText.innerText = 'Tamamlandı';
                    
                    // Generate Content
                    let contentHtml = '';
                    
                    // Check if URL matches mock data
                    const domain = tab.url.replace(/^https?:\/\//, '').replace(/\/$/, '');
                    if (mockData[domain]) {
                        contentHtml = mockData[domain].content;
                        tab.title = mockData[domain].title;
                    } else {
                        // Generic 404 / Search Page
                        contentHtml = `
                            <div class="flex flex-col items-center justify-center h-full w-full bg-slate-900 text-slate-300">
                                <div class="w-24 h-24 bg-slate-800 rounded-full flex items-center justify-center mb-6 text-4xl">🌐</div>
                                <h2 class="text-2xl font-bold mb-2">Siteye erişilemiyor</h2>
                                <p class="text-slate-500 mb-6 max-w-md text-center">
                                    "${tab.url}" adresine ulaşılamıyor veya bu uygulama tarafından desteklenmiyor.
                                    <br><br>
                                    <span class="text-xs text-slate-600">(Bu bir simülasyondur. Gerçek internet siteleri yüklenmez.)</span>
                                </p>
                                <div class="grid grid-cols-2 gap-4 w-full max-w-md">
                                    <button onclick="app.navigateTo('google.com')" class="p-4 bg-slate-800 rounded hover:bg-slate-700 flex flex-col items-center transition-colors">
                                        <span class="text-2xl mb-2">🔍</span>
                                        <span class="text-sm">Google</span>
                                    </button>
                                    <button onclick="app.navigateTo('github.com')" class="p-4 bg-slate-800 rounded hover:bg-slate-700 flex flex-col items-center transition-colors">
                                        <span class="text-2xl mb-2">💻</span>
                                        <span class="text-sm">GitHub</span>
                                    </button>
                                    <button onclick="app.navigateTo('youtube.com')" class="p-4 bg-slate-800 rounded hover:bg-slate-700 flex flex-col items-center transition-colors">
                                        <span class="text-2xl mb-2">🎬</span>
                                        <span class="text-sm">YouTube</span>
                                    </button>
                                    <button onclick="app.navigateTo('weather.com')" class="p-4 bg-slate-800 rounded hover:bg-slate-700 flex flex-col items-center transition-colors">
                                        <span class="text-2xl mb-2">☀️</span>
                                        <span class="text-sm">Hava Durumu</span>
                                    </button>
                                </div>
                            </div>
                        `;
                    }

                    els.mainView.innerHTML = `<div class="fade-in h-full w-full">${contentHtml}</div>`;
                    els.urlInput.value = tab.url;
                    
                    // Update Tab Title in UI
                    renderTabs();
                    
                    // Update Nav Buttons
                    updateNavButtons();

                }, 600); // 600ms fake delay
            }

            function updateNavButtons() {
                const tab = tabs.find(t => t.id === activeTabId);
                if(tab) {
                    els.btnBack.disabled = tab.historyIndex <= 0;
                    els.btnForward.disabled = tab.historyIndex >= tab.history.length - 1;
                    
                    // Opacity handling for disabled state via Tailwind classes
                    els.btnBack.style.opacity = els.btnBack.disabled ? '0.3' : '1';
                    els.btnForward.style.opacity = els.btnForward.disabled ? '0.3' : '1';
                }
            }

            // --- Public Methods ---

            function newTab(url = 'flux://newtab') {
                tabCounter++;
                const newTab = {
                    id: tabCounter,
                    url: url,
                    title: 'Yeni Sekme',
                    history: [url],
                    historyIndex: 0
                };
                tabs.push(newTab);
                switchTab(tabCounter);
            }

            function closeTab(id) {
                tabs = tabs.filter(t => t.id !== id);
                if (tabs.length === 0) {
                    newTab();
                } else if (activeTabId === id) {
                    switchTab(tabs[tabs.length - 1].id);
                } else {
                    renderTabs();
                }
            }

            function switchTab(id) {
                activeTabId = id;
                renderTabs();
                renderContent();
            }

            function navigateTo(url) {
                const tab = tabs.find(t => t.id === activeTabId);
                if (!tab) return;

                // Format URL
                if (!url.includes('://') && !url.startsWith('flux://')) {
                    if (url.includes('.') && !url.includes(' ')) {
                        url = 'https://' + url;
                    } else {
                        url = 'https://google.com/search?q=' + encodeURIComponent(url);
                    }
                }

                // Update History
                // Remove forward history if we navigate from middle of stack
                if (tab.historyIndex < tab.history.length - 1) {
                    tab.history = tab.history.slice(0, tab.historyIndex + 1);
                }
                
                tab.history.push(url);
                tab.historyIndex++;
                
                tab.url = url;
                renderContent();
            }

            function goBack() {
                const tab = tabs.find(t => t.id === activeTabId);
                if (tab && tab.historyIndex > 0) {
                    tab.historyIndex--;
                    tab.url = tab.history[tab.historyIndex];
                    renderContent();
                }
            }

            function goForward() {
                const tab = tabs.find(t => t.id === activeTabId);
                if (tab && tab.historyIndex < tab.history.length - 1) {
                    tab.historyIndex++;
                    tab.url = tab.history[tab.historyIndex];
                    renderContent();
                }
            }

            function refresh() {
                renderContent();
            }

            // Expose public API
            return {
                init,
                newTab,
                closeTab,
                switchTab,
                navigateTo,
                goBack,
                goForward,
                refresh
            };
        })();

        // Initialize App on Load
        document.addEventListener('DOMContentLoaded', () => {
            app.init();
        });

    </script>
</body>
</html>