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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>AI Knowledge Base Server</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <script src="https://cdn.jsdelivr.net/npm/@supabase/supabase-js@2"></script>
    <style>
        .gradient-bg {
            background: linear-gradient(135deg, #6e8efb, #a777e3);
        }
        .knowledge-card {
            transition: all 0.3s ease;
            border-left: 4px solid #6e8efb;
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        .knowledge-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
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            transition: all 0.3s ease;
        }
        .file-upload:hover {
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        .sidebar {
            transition: all 0.3s ease;
        }
        .sidebar-item:hover {
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        .pulse-animation {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(110, 142, 251, 0.7); }
            70% { box-shadow: 0 0 0 10px rgba(110, 142, 251, 0); }
            100% { box-shadow: 0 0 0 0 rgba(110, 142, 251, 0); }
        }
        .auth-modal {
            transition: all 0.3s ease;
        }
        .auth-modal.hidden {
            opacity: 0;
            pointer-events: none;
        }
        .auth-modal:not(.hidden) {
            opacity: 1;
        }
    </style>
</head>
<body class="bg-gray-100 font-sans">
    <!-- Auth Modal -->
    <div id="auth-modal" class="auth-modal fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50 hidden">
        <div class="bg-white rounded-lg shadow-xl w-full max-w-md">
            <div class="p-4 border-b border-gray-200 flex justify-between items-center">
                <h3 class="text-lg font-semibold" id="auth-modal-title">Sign In</h3>
                <button id="close-auth-modal" class="text-gray-500 hover:text-gray-700">
                    <i class="fas fa-times"></i>
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            </div>
            
            <div class="p-6">
                <div id="auth-tabs" class="flex border-b border-gray-200 mb-6">
                    <button class="auth-tab px-4 py-2 font-medium text-purple-600 border-b-2 border-purple-600" data-tab="signin">Sign In</button>
                    <button class="auth-tab px-4 py-2 font-medium text-gray-500 hover:text-gray-700" data-tab="signup">Sign Up</button>
                    <button class="auth-tab px-4 py-2 font-medium text-gray-500 hover:text-gray-700" data-tab="forgot">Forgot Password</button>
                </div>
                
                <!-- Sign In Form -->
                <div id="signin-form" class="auth-form">
                    <div class="mb-4">
                        <label class="block text-sm font-medium text-gray-700 mb-1">Email</label>
                        <input type="email" id="signin-email" class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-purple-500">
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                        <label class="block text-sm font-medium text-gray-700 mb-1">Password</label>
                        <input type="password" id="signin-password" class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-purple-500">
                    </div>
                    <button id="signin-btn" class="w-full gradient-bg text-white py-2 px-4 rounded-md font-medium mb-4">
                        Sign In
                    </button>
                    <div class="text-center text-sm text-gray-500">
                        Or sign in with
                    </div>
                    <div class="flex justify-center space-x-4 mt-4">
                        <button id="google-signin" class="p-2 border border-gray-300 rounded-full hover:bg-gray-50">
                            <i class="fab fa-google text-red-500"></i>
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                        <button id="github-signin" class="p-2 border border-gray-300 rounded-full hover:bg-gray-50">
                            <i class="fab fa-github text-gray-800"></i>
                        </button>
                    </div>
                </div>
                
                <!-- Sign Up Form -->
                <div id="signup-form" class="auth-form hidden">
                    <div class="mb-4">
                        <label class="block text-sm font-medium text-gray-700 mb-1">Email</label>
                        <input type="email" id="signup-email" class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-purple-500">
                    </div>
                    <div class="mb-4">
                        <label class="block text-sm font-medium text-gray-700 mb-1">Password</label>
                        <input type="password" id="signup-password" class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-purple-500">
                    </div>
                    <div class="mb-6">
                        <label class="block text-sm font-medium text-gray-700 mb-1">Confirm Password</label>
                        <input type="password" id="signup-confirm-password" class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-purple-500">
                    </div>
                    <button id="signup-btn" class="w-full gradient-bg text-white py-2 px-4 rounded-md font-medium">
                        Create Account
                    </button>
                </div>
                
                <!-- Forgot Password Form -->
                <div id="forgot-form" class="auth-form hidden">
                    <div class="mb-6">
                        <label class="block text-sm font-medium text-gray-700 mb-1">Email</label>
                        <input type="email" id="forgot-email" class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-purple-500">
                    </div>
                    <button id="forgot-btn" class="w-full gradient-bg text-white py-2 px-4 rounded-md font-medium">
                        Send Reset Link
                    </button>
                </div>
                
                <div id="auth-message" class="mt-4 text-center text-sm hidden"></div>
            </div>
        </div>
    </div>

    <!-- Main App (hidden until authenticated) -->
    <div id="app-container" class="hidden">
        <div class="flex h-screen overflow-hidden">
            <!-- Sidebar -->
            <div class="sidebar w-64 bg-gray-900 text-white flex flex-col">
                <div class="p-4 border-b border-gray-700">
                    <h1 class="text-2xl font-bold flex items-center">
                        <i class="fas fa-brain mr-2 text-purple-400"></i>
                        AI Knowledge Base
                    </h1>
                    <p class="text-gray-400 text-sm mt-1">Your centralized intelligence hub</p>
                </div>
                
                <div class="flex-1 overflow-y-auto">
                    <div class="p-4">
                        <h2 class="text-lg font-semibold text-gray-300 mb-2 flex items-center">
                            <i class="fas fa-folder-open mr-2 text-blue-400"></i>
                            Categories
                        </h2>
                        <ul id="categories-list" class="space-y-1">
                            <li class="sidebar-item px-3 py-2 rounded cursor-pointer bg-gray-800">
                                <i class="fas fa-code mr-2 text-green-400"></i>
                                Code Frameworks
                            </li>
                            <li class="sidebar-item px-3 py-2 rounded cursor-pointer">
                                <i class="fas fa-file-alt mr-2 text-yellow-400"></i>
                                Documentation
                            </li>
                            <li class="sidebar-item px-3 py-2 rounded cursor-pointer">
                                <i class="fas fa-chart-line mr-2 text-red-400"></i>
                                Analytics
                            </li>
                            <li class="sidebar-item px-3 py-2 rounded cursor-pointer">
                                <i class="fas fa-project-diagram mr-2 text-purple-400"></i>
                                Projects
                            </li>
                        </ul>
                    </div>
                    
                    <div class="p-4 border-t border-gray-700">
                        <h2 class="text-lg font-semibold text-gray-300 mb-2 flex items-center">
                            <i class="fas fa-tags mr-2 text-blue-400"></i>
                            Popular Tags
                        </h2>
                        <div id="tags-list" class="flex flex-wrap gap-2">
                            <span class="sidebar-item px-2 py-1 rounded-full text-xs bg-gray-800 cursor-pointer">
                                #python
                            </span>
                            <span class="sidebar-item px-2 py-1 rounded-full text-xs bg-gray-800 cursor-pointer">
                                #ai
                            </span>
                            <span class="sidebar-item px-2 py-1 rounded-full text-xs bg-gray-800 cursor-pointer">
                                #flask
                            </span>
                            <span class="sidebar-item px-2 py-1 rounded-full text-xs bg-gray-800 cursor-pointer">
                                #machinelearning
                            </span>
                        </div>
                    </div>
                    
                    <div class="p-4 border-t border-gray-700">
                        <h2 class="text-lg font-semibold text-gray-300 mb-2 flex items-center">
                            <i class="fas fa-cog mr-2 text-blue-400"></i>
                            AI Models
                        </h2>
                        <ul class="space-y-2">
                            <li class="sidebar-item px-3 py-2 rounded cursor-pointer flex items-center justify-between">
                                <div>
                                    <i class="fas fa-robot mr-2 text-green-400"></i>
                                    DeepSeek V3.1
                                </div>
                                <span class="text-xs bg-green-500 text-white px-2 py-1 rounded-full">Active</span>
                            </li>
                            <li class="sidebar-item px-3 py-2 rounded cursor-pointer flex items-center">
                                <i class="fas fa-robot mr-2 text-blue-400"></i>
                                Local LLM
                            </li>
                        </ul>
                    </div>
                </div>
                
                <div class="p-4 border-t border-gray-700">
                    <button id="upload-btn" class="w-full gradient-bg text-white py-2 px-4 rounded-lg font-medium flex items-center justify-center">
                        <i class="fas fa-cloud-upload-alt mr-2"></i>
                        Upload Knowledge
                    </button>
                </div>
            </div>
            
            <!-- Main Content -->
            <div class="flex-1 flex flex-col overflow-hidden">
                <!-- Header -->
                <header class="bg-white shadow-sm z-10">
                    <div class="flex items-center justify-between px-6 py-4">
                        <div class="flex items-center">
                            <div class="relative w-64">
                                <input type="text" placeholder="Search knowledge base..." 
                                       class="w-full pl-10 pr-4 py-2 rounded-lg border border-gray-300 focus:outline-none focus:ring-2 focus:ring-purple-500 focus:border-transparent">
                                <i class="fas fa-search absolute left-3 top-3 text-gray-400"></i>
                            </div>
                        </div>
                        
                        <div class="flex items-center space-x-4">
                            <button class="pulse-animation gradient-bg text-white py-2 px-4 rounded-lg font-medium flex items-center">
                                <i class="fas fa-bolt mr-2"></i>
                                Train AI Model
                            </button>
                            <div id="user-menu" class="relative">
                                <button id="user-menu-button" class="flex items-center space-x-2 focus:outline-none">
                                    <div class="h-8 w-8 rounded-full bg-purple-500 flex items-center justify-center text-white font-bold">
                                        <i class="fas fa-user"></i>
                                    </div>
                                    <span id="user-email" class="text-sm font-medium"></span>
                                </button>
                                <div id="user-dropdown" class="hidden absolute right-0 mt-2 w-48 bg-white rounded-md shadow-lg py-1 z-50">
                                    <a href="#" class="block px-4 py-2 text-sm text-gray-700 hover:bg-gray-100">Profile</a>
                                    <a href="#" class="block px-4 py-2 text-sm text-gray-700 hover:bg-gray-100">Settings</a>
                                    <button id="signout-btn" class="block w-full text-left px-4 py-2 text-sm text-gray-700 hover:bg-gray-100">Sign Out</button>
                                </div>
                            </div>
                        </div>
                    </div>
                </header>
                
                <!-- Content -->
                <main class="flex-1 overflow-y-auto p-6 bg-gray-50">
                    <div class="mb-6 flex justify-between items-center">
                        <h2 class="text-2xl font-bold text-gray-800">Knowledge Repository</h2>
                        <div class="flex space-x-2">
                            <button class="bg-white border border-gray-300 px-3 py-1 rounded-lg text-sm flex items-center">
                                <i class="fas fa-filter mr-2 text-gray-500"></i>
                                Filter
                            </button>
                            <button class="bg-white border border-gray-300 px-3 py-1 rounded-lg text-sm flex items-center">
                                <i class="fas fa-sort mr-2 text-gray-500"></i>
                                Sort
                            </button>
                        </div>
                    </div>
                    
                    <!-- Stats Cards -->
                    <div class="grid grid-cols-1 md:grid-cols-4 gap-4 mb-6">
                        <div class="bg-white rounded-lg shadow p-4">
                            <div class="flex items-center justify-between">
                                <div>
                                    <p class="text-gray-500 text-sm">Total Files</p>
                                    <h3 class="text-2xl font-bold">1,248</h3>
                                </div>
                                <div class="p-3 rounded-full bg-blue-100 text-blue-500">
                                    <i class="fas fa-file-alt"></i>
                                </div>
                            </div>
                        </div>
                        <div class="bg-white rounded-lg shadow p-4">
                            <div class="flex items-center justify-between">
                                <div>
                                    <p class="text-gray-500 text-sm">AI Models</p>
                                    <h3 class="text-2xl font-bold">5</h3>
                                </div>
                                <div class="p-3 rounded-full bg-purple-100 text-purple-500">
                                    <i class="fas fa-robot"></i>
                                </div>
                            </div>
                        </div>
                        <div class="bg-white rounded-lg shadow p-4">
                            <div class="flex items-center justify-between">
                                <div>
                                    <p class="text-gray-500 text-sm">Knowledge Used</p>
                                    <h3 class="text-2xl font-bold">87%</h3>
                                </div>
                                <div class="p-3 rounded-full bg-green-100 text-green-500">
                                    <i class="fas fa-chart-pie"></i>
                                </div>
                            </div>
                        </div>
                        <div class="bg-white rounded-lg shadow p-4">
                            <div class="flex items-center justify-between">
                                <div>
                                    <p class="text-gray-500 text-sm">Last Training</p>
                                    <h3 class="text-2xl font-bold">2h ago</h3>
                                </div>
                                <div class="p-3 rounded-full bg-yellow-100 text-yellow-500">
                                    <i class="fas fa-bolt"></i>
                                </div>
                            </div>
                        </div>
                    </div>
                    
                    <!-- Knowledge Items -->
                    <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
                        <!-- Sample knowledge cards -->
                        <div class="knowledge-card bg-white rounded-lg shadow p-4">
                            <div class="flex items-start justify-between mb-3">
                                <div class="flex items-center">
                                    <div class="p-2 rounded-lg bg-blue-100 text-blue-500 mr-3">
                                        <i class="fas fa-code"></i>
                                    </div>
                                    <div>
                                        <h4 class="font-bold">Custom AI Framework</h4>
                                        <p class="text-gray-500 text-sm">Advanced neural network implementation</p>
                                    </div>
                                </div>
                                <button class="text-gray-400 hover:text-gray-600">
                                    <i class="fas fa-ellipsis-v"></i>
                                </button>
                            </div>
                            <p class="text-gray-600 text-sm mb-3">Complete implementation of our proprietary AI framework with custom layers and optimization techniques.</p>
                            <div class="flex flex-wrap gap-2 mb-3">
                                <span class="px-2 py-1 bg-blue-100 text-blue-600 text-xs rounded-full">#python</span>
                                <span class="px-2 py-1 bg-purple-100 text-purple-600 text-xs rounded-full">#tensorflow</span>
                                <span class="px-2 py-1 bg-green-100 text-green-600 text-xs rounded-full">#ai</span>
                            </div>
                            <div class="flex items-center justify-between text-xs text-gray-500">
                                <span>Updated 3 days ago</span>
                                <span>1.2 MB</span>
                            </div>
                        </div>
                        
                        <div class="knowledge-card bg-white rounded-lg shadow p-4">
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