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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>Study RAG Assistant</title>
    <style>
        :root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --bg-body: #F3F4F6;
            --bg-white: #FFFFFF;
            --text-main: #1F2937;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --success: #10B981;
            --warning: #F59E0B;
            --error: #EF4444;
            --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
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        * { box-sizing: border-box; }
        body { margin: 0; font-family: var(--font-main); background: var(--bg-body); color: var(--text-main); height: 100vh; display: flex; flex-direction: column; overflow: hidden; }

        header {
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            box-shadow: 0 1px 2px rgba(0,0,0,0.05); z-index: 10;
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        .header-controls { display: flex; gap: 20px; align-items: center; }
        .control-group { display: flex; align-items: center; gap: 8px; font-size: 13px; }
        select, input[type="number"] {
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        aside {
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            display: flex; flex-direction: column;
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        .upload-zone {
            margin: 15px; padding: 20px; border: 2px dashed var(--border); border-radius: 8px;
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        .citation-trigger:hover { text-decoration: underline; color: var(--primary); }

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        .btn-sm:hover { border-color: var(--primary); color: var(--primary); }

        .notes-toolbar { padding: 15px 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; background: #fff; }
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        .modal-body { flex: 1; padding: 20px; overflow-y: auto; font-family: var(--font-mono); font-size: 13px; }

    </style>
</head>
<body>

<header>
    <div class="brand">Study RAG Assistant</div>
    <div class="header-controls">
        <div class="control-group">
            <span>Model:</span>
            <select><option>GPT-4o</option><option>Claude 3.5 Sonnet</option></select>
        </div>
        <div class="control-group">
            <span>Chunk:</span>
            <input type="number" value="512" style="width: 60px">
            <span>Overlap:</span>
            <input type="number" value="50" style="width: 50px">
        </div>
        <div class="stats-pill">4 Files β€’ 1,240 Chunks β€’ Indexed 2m ago</div>
    </div>
</header>

<div class="app-container">
    <aside>
        <div class="upload-zone" onclick="alert('Mock Upload: Files added to queue.')">
            Drag & Drop <br>.ipynb or .pdf
        </div>

        <div class="file-list">
            <div class="file-item">
                <div class="file-icon">PDF</div>
                <div class="file-info">
                    <div class="file-name">Deep_Learning_Lec1.pdf</div>
                    <div class="file-meta">
                        <span class="status-badge status-ready">Ready</span>
                    </div>
                </div>
                <input type="checkbox" checked style="margin-left: 8px;">
            </div>

            <div class="file-item">
                <div class="file-icon">NB</div>
                <div class="file-info">
                    <div class="file-name">Neural_Nets_Practice.ipynb</div>
                    <div class="file-meta">
                        <span class="status-badge status-ready">Ready</span>
                    </div>
                </div>
                <input type="checkbox" checked style="margin-left: 8px;">
            </div>

            <div class="file-item">
                <div class="file-icon">PDF</div>
                <div class="file-info">
                    <div class="file-name">Stats_Review.pdf</div>
                    <div class="file-meta">
                        <span class="status-badge status-indexing">Indexing...</span>
                    </div>
                </div>
                <input type="checkbox" checked style="margin-left: 8px;">
            </div>
        </div>

        <div class="sidebar-footer">
            <div class="toggle-row">
                <label>Show Selected Only</label>
                <input type="checkbox">
            </div>
            <button class="btn-glossary" onclick="alert('Glossary Drawer would open here.')">
                <span>πŸ“– Memory / Glossary</span>
                <span>β€Ί</span>
            </button>
        </div>
    </aside>

    <main>
        <div class="tabs">
            <button class="tab-btn active" onclick="switchTab('chat', event)">Chat</button>
            <button class="tab-btn" onclick="switchTab('notes', event)">Notes</button>
            <button class="tab-btn" onclick="switchTab('quiz', event)">Quiz</button>
        </div>

        <div id="tab-chat" class="tab-content active">
            <div class="chat-area" id="chat-container">
                <div class="message ai">
                    <div class="bubble">
                        Hi! I've indexed your documents. Ask me to explain concepts, generate a quiz, or summarize topics.
                    </div>
                </div>
            </div>

            <div class="input-area">
                <div class="quick-actions">
                    <div class="pill" onclick="setInput('Explain backpropagation like I\\'m 5')">Explain Like I'm 5</div>
                    <div class="pill" onclick="setInput('Give me 3 code examples of RNNs')">Give Code Examples</div>
                    <div class="pill" onclick="setInput('What are the key differences between CNN and RNN?')">Compare Concepts</div>
                </div>
                <div class="chat-input-wrapper">
                    <textarea id="chat-input" placeholder="Ask a question about your files..."></textarea>
                    <button class="btn-primary" onclick="sendMessage()">Ask</button>
                </div>
                <div class="chat-controls">
                    <label class="toggle-label">
                        <input type="checkbox" checked> Strictly Grounded (No Guessing)
                    </label>
                </div>
            </div>
        </div>

        <div id="tab-notes" class="tab-content">
            <div class="notes-toolbar">
                <button class="btn-primary" onclick="alert('Mock: regenerate notes')">Regenerate Notes</button>
                <div style="display:flex; gap:10px; align-items:center;">
                    <span>Format:</span>
                    <select><option>Bullet Notes</option><option>Cornell Notes</option><option>Outline</option></select>
                    <button class="btn-sm" onclick="alert('Mock export')">Export MD</button>
                </div>
            </div>
            <div class="notes-content">
                <div class="notes-topic">1. Introduction to Neural Networks</div>
                <div class="notes-bullet"><span>β€’</span><div>Neural networks are computing systems inspired by biological neural networks.<div class="citation-ref">[Deep_Learning_Lec1.pdf - pg 2]</div></div></div>
                <div class="notes-topic">2. Backpropagation</div>
                <div class="notes-bullet"><span>β€’</span><div>Backpropagation computes gradients of the loss w.r.t. weights.<div class="citation-ref">[Deep_Learning_Lec1.pdf - pg 14]</div></div></div>
            </div>
        </div>

        <div id="tab-quiz" class="tab-content">
            <div class="quiz-settings">
                <div class="control-group">
                    <label>Questions:</label>
                    <input type="range" min="5" max="50" value="10" oninput="this.nextElementSibling.innerText = this.value">
                    <span>10</span>
                </div>
                <div class="control-group">
                    <label>Type:</label>
                    <select><option>Multiple Choice</option><option>True/False</option><option>Code Reading</option></select>
                </div>
                <button class="btn-primary" style="margin-left:auto;" onclick="alert('Mock: generate quiz')">Generate Quiz</button>
            </div>
            <div class="quiz-area">
                <div class="quiz-card">
                    <div class="q-text">Mock quiz question will show here.</div>
                </div>
            </div>
        </div>
    </main>
</div>

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    setTimeout(() => {
        const aiMsg = document.createElement('div');
        aiMsg.className = 'message ai';
        aiMsg.innerHTML = `<div class="bubble">Mock response (backend not connected yet).</div>`;
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        container.scrollTop = container.scrollHeight;
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</body>
</html>