commit cdba7de935ef81a804348f095ba112e0c6f6c3a7
Author: Zhenyu Qi <qzydustin@hotmail.com>
Date:   Sun Oct 5 03:47:45 2025 -0700

    release 1.0.0

diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,42 @@
+# zyBooksBot
+
+An intelligent automation bot for the zyBooks learning platform. Automatically complete Challenge Activities and Participation Activities with batch processing and real-time progress tracking.
+
+## Features
+
+- Smart automation for zyBooks Challenge and Participation Activities
+- Batch processing for multiple chapters and sections
+- Real-time progress tracking with detailed status
+- Modern web interface with multi-select capabilities
+- Stateless architecture supporting multiple users
+- Robust error handling and recovery
+
+## Quick Start
+
+**Prerequisites:** Node.js (v14+)
+
+```bash
+git clone https://git.qzydustin.com/qzydustin/zyBooksBot
+cd zyBooksBot
+npm install
+npm start
+```
+
+Open http://localhost:3000 in your browser.
+
+## Usage
+
+1. Login with your zyBooks credentials
+2. Select books and chapters
+3. Use checkboxes for batch selection
+4. Execute and monitor real-time progress
+
+## Technical Details
+
+**Stack:** Node.js, Express.js, JavaScript  
+**Communication:** HTTP API with Server-Sent Events  
+**Key Features:** Real-time streaming, frontend state management
+
+## Important Notes
+
+This tool is for educational purposes. Ensure compliance with your institution's academic integrity policies and zyBooks terms of service.
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..0bea771
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1350 @@
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+      "integrity": "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.4.0"
+      }
+    },
+    "node_modules/vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..1f7bdc1
--- /dev/null
+++ b/package.json
@@ -0,0 +1,28 @@
+{
+  "name": "zyBooksBot",
+  "version": "1.0.0",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js",
+    "dev": "nodemon server.js"
+  },
+  "keywords": [
+    "zybooks",
+    "automation",
+    "education",
+    "challenge-activities", 
+    "participation-activities",
+    "bot",
+    "batch-processing",
+    "student-tools"
+  ],
+  "dependencies": {
+    "express": "^4.18.2",
+    "axios": "^1.6.0",
+    "cors": "^2.8.5",
+    "crypto": "^1.0.1"
+  },
+  "devDependencies": {
+    "nodemon": "^3.0.1"
+  }
+}
\ No newline at end of file
diff --git a/public/index.html b/public/index.html
new file mode 100644
index 0000000..d7760c6
--- /dev/null
+++ b/public/index.html
@@ -0,0 +1,86 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>ZyBook Auto Solver</title>
+    <link rel="stylesheet" href="style.css">
+</head>
+<body>
+    <div class="container">
+        <header>
+            <h1>🚀 ZyBook Auto Solver</h1>
+            <p>Automated ZyBook assignment completion tool</p>
+        </header>
+
+        <!-- Login Section -->
+        <div id="login-section" class="section">
+            <h2>Login to ZyBooks</h2>
+            <form id="login-form">
+                <div class="form-group">
+                    <label for="email">Email:</label>
+                    <input type="email" id="email" required>
+                </div>
+                <div class="form-group">
+                    <label for="password">Password:</label>
+                    <input type="password" id="password" required>
+                </div>
+                <button type="submit" class="btn btn-primary">Login</button>
+            </form>
+        </div>
+
+        <!-- Books Section -->
+        <div id="books-section" class="section hidden">
+            <h2>Select Book</h2>
+            <div id="books-list" class="list-container"></div>
+        </div>
+
+        <!-- Chapters Section -->
+        <div id="chapters-section" class="section hidden">
+            <h2>Select Chapters</h2>
+            <div class="back-btn" onclick="showSection('books-section')">← Back to Books</div>
+            
+            <div class="batch-controls">
+                <button class="btn btn-secondary" onclick="selectAllChapters(true)">Select All</button>
+                <button class="btn btn-secondary" onclick="selectAllChapters(false)">Deselect All</button>
+                <button class="btn btn-primary" onclick="executeSelectedChapters()">Execute Selected Chapters</button>
+            </div>
+            
+            <div id="chapters-list" class="list-container"></div>
+        </div>
+
+        <!-- Sections Section -->
+        <div id="sections-section" class="section hidden">
+            <h2>Select Sections</h2>
+            <div class="back-btn" onclick="showSection('chapters-section')">← Back to Chapters</div>
+            
+            <div class="batch-controls">
+                <button class="btn btn-secondary" onclick="selectAllSections(true)">Select All</button>
+                <button class="btn btn-secondary" onclick="selectAllSections(false)">Deselect All</button>
+                <button class="btn btn-primary" onclick="executeSelectedSections()">Execute Selected Sections</button>
+            </div>
+            
+            <div id="sections-list" class="list-container"></div>
+        </div>
+
+        <!-- Progress Section -->
+        <div id="progress-section" class="section hidden">
+            <h2>Progress</h2>
+            <div class="progress-bar">
+                <div id="progress-fill" class="progress-fill"></div>
+            </div>
+            <div id="progress-text">Ready to start...</div>
+            <div id="results-log" class="results-log"></div>
+            <button class="btn btn-secondary" onclick="goHome()" style="margin-top: 20px;">Back to Home</button>
+        </div>
+
+        <!-- Loading Animation -->
+        <div id="loading" class="loading hidden">
+            <div class="spinner"></div>
+            <p>Processing...</p>
+        </div>
+    </div>
+
+    <script src="script.js"></script>
+</body>
+</html>
\ No newline at end of file
diff --git a/public/script.js b/public/script.js
new file mode 100644
index 0000000..0a026ba
--- /dev/null
+++ b/public/script.js
@@ -0,0 +1,610 @@
+// Global variables
+let authToken = '';
+let userId = '';
+let currentBook = null;
+let currentChapter = null;
+let userTimeSpent = 0; // Track user's cumulative time spent
+
+// ==================== UTILITY FUNCTIONS ====================
+
+function showSection(sectionId) {
+    document.querySelectorAll('.section').forEach(section => {
+        section.classList.add('hidden');
+    });
+    document.getElementById(sectionId).classList.remove('hidden');
+}
+
+function showLoading(show = true) {
+    const loading = document.getElementById('loading');
+    if (show) {
+        loading.classList.remove('hidden');
+    } else {
+        loading.classList.add('hidden');
+    }
+}
+
+function addLogEntry(message, type = 'info') {
+    const log = document.getElementById('results-log');
+    const entry = document.createElement('div');
+    entry.className = `log-entry log-${type}`;
+    entry.textContent = `${new Date().toLocaleTimeString()} - ${message}`;
+    log.appendChild(entry);
+    log.scrollTop = log.scrollHeight;
+}
+
+function updateProgress(current, total) {
+    const progressFill = document.getElementById('progress-fill');
+    const progressText = document.getElementById('progress-text');
+    const percentage = Math.round((current / total) * 100);
+    
+    progressFill.style.width = `${percentage}%`;
+    progressText.textContent = `Progress: ${current}/${total} (${percentage}%)`;
+}
+
+// ==================== API FUNCTIONS ====================
+
+// Get section parts count
+async function getSectionPartsCount(section, chapter = currentChapter) {
+    try {
+        if (!section || !section.number) {
+            return 99;
+        }
+        if (!chapter || !chapter.number) {
+            return 99;
+        }
+        
+        const response = await fetch(`/api/section-parts/${currentBook.zybook_code}/${chapter.number}/${section.number}?auth_token=${authToken}`);
+        if (response.ok) {
+            const data = await response.json();
+            if (data.success) {
+                return data.totalParts;
+            }
+        }
+        return 99; 
+    } catch (error) {
+        console.error('Error getting section parts count:', error);
+        return 99;
+    }
+}
+
+// Solve single section for batch processing
+async function solveSectionForBatch(section, currentSection, totalSections, sectionIndex, globalPartTracker) {
+    try {
+        if (!currentBook || !currentBook.zybook_code) {
+            throw new Error('Current book not set');
+        }
+        if (!currentChapter) {
+            throw new Error('Current chapter not set');
+        }
+        if (!authToken) {
+            throw new Error('Auth token not set');
+        }
+        if (!section) {
+            throw new Error('Section data missing');
+        }
+        
+        const response = await fetch('/api/solve/section', {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+                'Accept': 'text/event-stream'
+            },
+            body: JSON.stringify({
+                bookCode: currentBook.zybook_code,
+                chapter: currentChapter,
+                section: section,
+                auth: authToken,
+                timeSpent: userTimeSpent
+            })
+        });
+
+        if (!response.ok) {
+            throw new Error(`HTTP error! status: ${response.status}`);
+        }
+
+        const reader = response.body.getReader();
+        const decoder = new TextDecoder();
+        let buffer = '';
+        let sectionResults = [];
+
+        while (true) {
+            const { done, value } = await reader.read();
+            if (done) break;
+
+            buffer += decoder.decode(value, { stream: true });
+            const lines = buffer.split('\n');
+            buffer = lines.pop() || '';
+            
+            for (const line of lines) {
+                if (line.startsWith('data: ')) {
+                    try {
+                        const data = JSON.parse(line.slice(6));
+                        
+                        switch (data.type) {
+                            case 'total':
+                                addLogEntry(`  📊 [${sectionIndex}/${totalSections}] Section has ${data.total} parts`, 'info');
+                                break;
+                            case 'progress':
+                                addLogEntry(`  ⚡ [${sectionIndex}/${totalSections}] Processing ${data.current}/${data.total}...`, 'info');
+                                break;
+                            case 'result':
+                                sectionResults.push(data);
+                                globalPartTracker.completedParts++;
+                                updateProgress(globalPartTracker.completedParts, globalPartTracker.totalParts);
+                                const status = data.success ? '✅' : '❌';
+                                addLogEntry(`  ${status} [${sectionIndex}/${totalSections}] Part ${data.part || sectionResults.length}: ${data.success ? 'Success' : 'Failed'} (Global: ${globalPartTracker.completedParts}/${globalPartTracker.totalParts})`, data.success ? 'success' : 'error');
+                                break;
+                            case 'complete':
+                                const successCount = sectionResults.filter(r => r.success).length;
+                                addLogEntry(`  🎯 [${sectionIndex}/${totalSections}] Section completed! Success: ${successCount}/${sectionResults.length}`, 'success');
+                                break;
+                            case 'error':
+                                addLogEntry(`  ❌ [${sectionIndex}/${totalSections}] Section failed: ${data.message}`, 'error');
+                                throw new Error(data.message);
+                        }
+                    } catch (e) {
+                        if (e.message && e.message !== 'Unexpected end of JSON input') {
+                            console.error('Error parsing SSE data:', e);
+                        }
+                    }
+                }
+            }
+        }
+    } catch (error) {
+        throw error;
+    }
+}
+
+// Solve single section
+async function solveSection(section) {
+    showSection('progress-section');
+    
+    updateProgress(0, 1);
+    document.getElementById('results-log').innerHTML = '';
+    addLogEntry(`Starting section: ${currentChapter.number}.${section.number} - ${section.title}`);
+    
+    try {
+        const response = await fetch('/api/solve/section', {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+                'Accept': 'text/event-stream'
+            },
+            body: JSON.stringify({
+                bookCode: currentBook.zybook_code,
+                chapter: currentChapter,
+                section: section,
+                auth: authToken,
+                timeSpent: userTimeSpent
+            })
+        });
+
+        if (!response.ok) {
+            throw new Error(`HTTP error! status: ${response.status}`);
+        }
+
+        const reader = response.body.getReader();
+        const decoder = new TextDecoder();
+        let buffer = '';
+
+        while (true) {
+            const { done, value } = await reader.read();
+            if (done) break;
+
+            buffer += decoder.decode(value, { stream: true });
+            const lines = buffer.split('\n');
+            buffer = lines.pop() || '';
+            
+            for (const line of lines) {
+                if (line.startsWith('data: ')) {
+                    try {
+                        const data = JSON.parse(line.slice(6));
+                        handleSSEMessage(data);
+                    } catch (e) {
+                        console.error('Error parsing SSE data:', e);
+                    }
+                }
+            }
+        }
+    } catch (error) {
+        console.error('Section solving error:', error);
+        addLogEntry('Error solving section: ' + error.message, 'error');
+    }
+}
+
+// Handle SSE messages
+function handleSSEMessage(data) {
+    switch (data.type) {
+        case 'start':
+            addLogEntry(data.message, 'info');
+            break;
+        case 'total':
+            updateProgress(0, data.total);
+            break;
+        case 'progress':
+            updateProgress(data.current, data.total);
+            addLogEntry(data.message, 'info');
+            break;
+        case 'result':
+            updateProgress(data.current, data.total);
+            const resultType = data.success ? 'success' : 'error';
+            addLogEntry(data.message, resultType);
+            // Update user time spent if provided
+            if (data.timeSpent !== undefined) {
+                userTimeSpent = data.timeSpent;
+            }
+            break;
+        case 'complete':
+            addLogEntry(data.message, 'success');
+            // Update final time spent if provided
+            if (data.finalTimeSpent !== undefined) {
+                userTimeSpent = data.finalTimeSpent;
+            }
+            break;
+        case 'error':
+            addLogEntry(data.message, 'error');
+            break;
+    }
+}
+
+function goHome() {
+    // Reset user time spent
+    userTimeSpent = 0;
+    
+    document.getElementById('results-log').innerHTML = '';
+    document.getElementById('progress-fill').style.width = '0%';
+    document.getElementById('progress-text').textContent = 'Ready to start...';
+    
+    showSection('books-section');
+}
+
+// ==================== LOGIN & DATA LOADING ====================
+
+document.addEventListener('DOMContentLoaded', function() {
+    const loading = document.getElementById('loading');
+    if (loading) {
+        loading.classList.add('hidden');
+    }
+    
+    const loginSection = document.getElementById('login-section');
+    if (loginSection) {
+        loginSection.classList.remove('hidden');
+    }
+});
+
+document.getElementById('login-form').addEventListener('submit', async (e) => {
+    e.preventDefault();
+    
+    const email = document.getElementById('email').value;
+    const password = document.getElementById('password').value;
+    
+    showLoading(true);
+    
+    try {
+        const response = await fetch('/api/auth/login', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ email, password })
+        });
+        
+        const data = await response.json();
+        
+        if (data.success) {
+            authToken = data.auth_token;
+            userId = data.user_id;
+            loadBooks();
+        } else {
+            alert('Login failed: ' + data.message);
+        }
+    } catch (error) {
+        console.error('Login error:', error);
+        alert('Login error: ' + error.message);
+    } finally {
+        showLoading(false);
+    }
+});
+
+async function loadBooks() {
+    showLoading(true);
+    
+    try {
+        const response = await fetch(`/api/books/${userId}?auth_token=${authToken}`);
+        const data = await response.json();
+        
+        if (data.success) {
+            const booksList = document.getElementById('books-list');
+            booksList.innerHTML = data.books.map(book => 
+                `<div class="list-item" onclick="loadChapters('${book.zybook_code}', '${book.title}')">
+                    <strong>${book.title}</strong>
+                    <small>${book.zybook_code}</small>
+                </div>`
+            ).join('');
+            
+            showSection('books-section');
+        } else {
+            alert('Failed to load books: ' + data.message);
+        }
+    } catch (error) {
+        console.error('Error loading books:', error);
+        alert('Error loading books: ' + error.message);
+    } finally {
+        showLoading(false);
+    }
+}
+
+async function loadChapters(bookCode, bookTitle) {
+    showLoading(true);
+    currentBook = { zybook_code: bookCode, title: bookTitle };
+    
+    try {
+        const response = await fetch(`/api/chapters/${bookCode}?auth_token=${authToken}`);
+        const data = await response.json();
+        
+        if (data.success) {
+            const chaptersList = document.getElementById('chapters-list');
+            chaptersList.innerHTML = data.chapters.map((chapter, index) => 
+                `<div class="list-item-checkbox" data-chapter-index="${index}">
+                    <input type="checkbox" id="chapter-${index}" onchange="updateChapterSelection()">
+                    <div class="item-content">
+                        <strong>Chapter ${chapter.number}: ${chapter.title}</strong>
+                        <small>${chapter.sections.length} sections</small>
+                    </div>
+                    <div class="item-actions">
+                        <button class="btn btn-small" onclick="selectSingleChapter(${index})">Enter</button>
+                    </div>
+                </div>`
+            ).join('');
+            
+            window.chaptersData = data.chapters;
+            updateChapterSelectionCount();
+            showSection('chapters-section');
+        } else {
+            alert('Failed to load chapters: ' + data.message);
+        }
+    } catch (error) {
+        console.error('Error loading chapters:', error);
+        alert('Error loading chapters: ' + error.message);
+    } finally {
+        showLoading(false);
+    }
+}
+
+function loadSections(chapter) {
+    currentChapter = chapter;
+    
+    const sectionsList = document.getElementById('sections-list');
+    sectionsList.innerHTML = chapter.sections.map((section, index) => 
+        `<div class="list-item-checkbox" data-section-index="${index}">
+            <input type="checkbox" id="section-${index}" onchange="updateSectionSelection()">
+            <div class="item-content">
+                <strong>Section ${chapter.number}.${section.number}: ${section.title}</strong>
+            </div>
+        </div>`
+    ).join('');
+    
+    window.sectionsData = chapter.sections;
+    updateSectionSelectionCount();
+    showSection('sections-section');
+}
+
+// ==================== CHAPTER MULTI-SELECT ====================
+
+function updateChapterSelection() {
+    const checkboxes = document.querySelectorAll('#chapters-list input[type="checkbox"]');
+    checkboxes.forEach((checkbox, index) => {
+        const listItem = checkbox.closest('.list-item-checkbox');
+        if (checkbox.checked) {
+            listItem.classList.add('selected');
+        } else {
+            listItem.classList.remove('selected');
+        }
+    });
+    updateChapterSelectionCount();
+}
+
+function updateChapterSelectionCount() {
+    const checkboxes = document.querySelectorAll('#chapters-list input[type="checkbox"]:checked');
+    const count = checkboxes.length;
+    
+    const batchControls = document.querySelector('#chapters-section .batch-controls');
+    let countDisplay = batchControls.querySelector('.selected-count');
+    if (!countDisplay) {
+        countDisplay = document.createElement('div');
+        countDisplay.className = 'selected-count';
+        batchControls.appendChild(countDisplay);
+    }
+    countDisplay.textContent = `${count} chapters selected`;
+}
+
+function selectAllChapters(selectAll) {
+    const checkboxes = document.querySelectorAll('#chapters-list input[type="checkbox"]');
+    checkboxes.forEach(checkbox => {
+        checkbox.checked = selectAll;
+    });
+    updateChapterSelection();
+}
+
+function selectSingleChapter(index) {
+    const chapter = window.chaptersData[index];
+    currentChapter = chapter;
+    loadSections(chapter);
+}
+
+async function executeSelectedChapters() {
+    const checkboxes = document.querySelectorAll('#chapters-list input[type="checkbox"]:checked');
+    if (checkboxes.length === 0) {
+        alert('Please select at least one chapter');
+        return;
+    }
+    
+    const selectedChapters = Array.from(checkboxes).map(checkbox => {
+        const parentDiv = checkbox.closest('.list-item-checkbox');
+        const index = parseInt(parentDiv.dataset.chapterIndex);
+        return {
+            index: index,
+            chapter: window.chaptersData[index]
+        };
+    });
+    
+    const totalSections = selectedChapters.reduce((total, { chapter }) => total + chapter.sections.length, 0);
+    
+    showSection('progress-section');
+    
+    updateProgress(0, 1);
+    document.getElementById('results-log').innerHTML = '';
+    addLogEntry(`Starting batch processing of ${selectedChapters.length} chapters (${totalSections} sections total)`);
+    addLogEntry(`📊 Calculating total parts for all sections...`, 'info');
+    
+    // Pre-calculate total parts
+    let totalParts = 0;
+    let sectionIndex = 0;
+    for (let i = 0; i < selectedChapters.length; i++) {
+        const { chapter } = selectedChapters[i];
+        addLogEntry(`📚 Calculating chapter ${chapter.number}: ${chapter.title} (${chapter.sections.length} sections)`, 'info');
+        
+        for (let j = 0; j < chapter.sections.length; j++) {
+            sectionIndex++;
+            const section = chapter.sections[j];
+            addLogEntry(`  🔍 Getting parts count for section ${chapter.number}.${section.number}...`, 'info');
+            const sectionParts = await getSectionPartsCount(section, chapter);
+            totalParts += sectionParts;
+            addLogEntry(`  📊 Section ${chapter.number}.${section.number} has ${sectionParts} parts`, 'info');
+        }
+    }
+    
+    const globalPartTracker = {
+        totalParts: totalParts,
+        completedParts: 0
+    };
+    
+    updateProgress(0, totalParts);
+    addLogEntry(`🎯 Total parts to process: ${totalParts}`, 'success');
+    
+    sectionIndex = 0;
+    
+    for (let i = 0; i < selectedChapters.length; i++) {
+        const { chapter } = selectedChapters[i];
+        currentChapter = chapter;
+        addLogEntry(`📚 Starting chapter ${chapter.number}: ${chapter.title} (${chapter.sections.length} sections)`, 'info');
+        
+        for (let j = 0; j < chapter.sections.length; j++) {
+            sectionIndex++;
+            const section = chapter.sections[j];
+            addLogEntry(`📄 Starting section ${chapter.number}.${section.number}: ${section.title}`, 'info');
+            
+            try {
+                await solveSectionForBatch(section, `${chapter.number}.${section.number}`, totalSections, sectionIndex, globalPartTracker);
+                addLogEntry(`✅ Section ${chapter.number}.${section.number} completed`, 'success');
+            } catch (error) {
+                addLogEntry(`❌ Section ${chapter.number}.${section.number} failed: ${error.message}`, 'error');
+            }
+            
+            await new Promise(resolve => setTimeout(resolve, 1000));
+        }
+        
+        addLogEntry(`✅ Chapter ${chapter.number} completed (${chapter.sections.length} sections)`, 'success');
+        
+        if (i < selectedChapters.length - 1) {
+            await new Promise(resolve => setTimeout(resolve, 2000));
+        }
+    }
+    
+    addLogEntry(`🎉 Batch chapter processing completed! Processed ${totalParts} parts total`, 'success');
+}
+
+// ==================== SECTION MULTI-SELECT ====================
+
+function updateSectionSelection() {
+    const checkboxes = document.querySelectorAll('#sections-list input[type="checkbox"]');
+    checkboxes.forEach((checkbox, index) => {
+        const listItem = checkbox.closest('.list-item-checkbox');
+        if (checkbox.checked) {
+            listItem.classList.add('selected');
+        } else {
+            listItem.classList.remove('selected');
+        }
+    });
+    updateSectionSelectionCount();
+}
+
+function updateSectionSelectionCount() {
+    const checkboxes = document.querySelectorAll('#sections-list input[type="checkbox"]:checked');
+    const count = checkboxes.length;
+    
+    const batchControls = document.querySelector('#sections-section .batch-controls');
+    let countDisplay = batchControls.querySelector('.selected-count');
+    if (!countDisplay) {
+        countDisplay = document.createElement('div');
+        countDisplay.className = 'selected-count';
+        batchControls.appendChild(countDisplay);
+    }
+    countDisplay.textContent = `${count} sections selected`;
+}
+
+function selectAllSections(selectAll) {
+    const checkboxes = document.querySelectorAll('#sections-list input[type="checkbox"]');
+    checkboxes.forEach(checkbox => {
+        checkbox.checked = selectAll;
+    });
+    updateSectionSelection();
+}
+
+async function executeSelectedSections() {
+    const checkboxes = document.querySelectorAll('#sections-list input[type="checkbox"]:checked');
+    if (checkboxes.length === 0) {
+        alert('Please select at least one section');
+        return;
+    }
+    
+    const selectedSections = Array.from(checkboxes).map(checkbox => {
+        const parentDiv = checkbox.closest('.list-item-checkbox');
+        const index = parseInt(parentDiv.dataset.sectionIndex);
+        return {
+            index: index,
+            section: window.sectionsData[index]
+        };
+    });
+    
+    showSection('progress-section');
+    
+    updateProgress(0, 1);
+    document.getElementById('results-log').innerHTML = '';
+    addLogEntry(`Starting batch processing of ${selectedSections.length} sections`);
+    addLogEntry(`📊 Calculating total parts for all sections...`, 'info');
+    
+    // Pre-calculate total parts
+    let totalParts = 0;
+    for (let i = 0; i < selectedSections.length; i++) {
+        const { section } = selectedSections[i];
+        addLogEntry(`  🔍 Getting parts count for section ${currentChapter.number}.${section.number}...`, 'info');
+        const sectionParts = await getSectionPartsCount(section, currentChapter);
+        totalParts += sectionParts;
+        addLogEntry(`  📊 Section ${currentChapter.number}.${section.number} has ${sectionParts} parts`, 'info');
+    }
+    
+    const globalPartTracker = {
+        totalParts: totalParts,
+        completedParts: 0
+    };
+    
+    updateProgress(0, totalParts);
+    addLogEntry(`🎯 Total parts to process: ${totalParts}`, 'success');
+    
+    for (let i = 0; i < selectedSections.length; i++) {
+        const { section } = selectedSections[i];
+        addLogEntry(`📄 Starting section ${currentChapter.number}.${section.number}: ${section.title}`, 'info');
+        
+        try {
+            await solveSectionForBatch(section, i + 1, selectedSections.length, i + 1, globalPartTracker);
+            addLogEntry(`✅ Section ${currentChapter.number}.${section.number} completed`, 'success');
+        } catch (error) {
+            addLogEntry(`❌ Section ${currentChapter.number}.${section.number} failed: ${error.message}`, 'error');
+        }
+        
+        if (i < selectedSections.length - 1) {
+            await new Promise(resolve => setTimeout(resolve, 1000));
+        }
+    }
+    
+    addLogEntry(`🎉 Batch section processing completed! Processed ${totalParts} parts total`, 'success');
+}
\ No newline at end of file
diff --git a/public/style.css b/public/style.css
new file mode 100644
index 0000000..b94d36a
--- /dev/null
+++ b/public/style.css
@@ -0,0 +1,399 @@
+/* Global Styles */
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+body {
+    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
+    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    min-height: 100vh;
+    color: #333;
+    overflow-x: hidden;
+    width: 100%;
+}
+
+.container {
+    max-width: 900px;
+    margin: 0 auto;
+    padding: 20px;
+    width: 100%;
+    box-sizing: border-box;
+}
+
+/* Header */
+header {
+    text-align: center;
+    margin-bottom: 30px;
+    color: white;
+}
+
+header h1 {
+    font-size: 2.5rem;
+    margin-bottom: 10px;
+    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
+}
+
+header p {
+    font-size: 1.1rem;
+    opacity: 0.9;
+}
+
+/* Sections */
+.section {
+    background: rgba(255, 255, 255, 0.95);
+    backdrop-filter: blur(10px);
+    border-radius: 20px;
+    padding: 30px;
+    margin-bottom: 20px;
+    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
+    border: 1px solid rgba(255, 255, 255, 0.2);
+}
+
+.section.hidden {
+    display: none;
+}
+
+.section h2 {
+    margin-bottom: 20px;
+    color: #4a5568;
+    font-size: 1.8rem;
+}
+
+/* Forms */
+.form-group {
+    margin-bottom: 20px;
+}
+
+.form-group label {
+    display: block;
+    margin-bottom: 8px;
+    font-weight: 600;
+    color: #4a5568;
+}
+
+.form-group input {
+    width: 100%;
+    padding: 12px 16px;
+    border: 2px solid #e2e8f0;
+    border-radius: 10px;
+    font-size: 16px;
+    transition: border-color 0.3s ease;
+}
+
+.form-group input:focus {
+    outline: none;
+    border-color: #667eea;
+    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
+}
+
+/* Buttons */
+.btn {
+    padding: 12px 24px;
+    border: none;
+    border-radius: 10px;
+    font-size: 16px;
+    font-weight: 600;
+    cursor: pointer;
+    transition: all 0.3s ease;
+    text-decoration: none;
+    display: inline-block;
+    text-align: center;
+}
+
+.btn-primary {
+    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    color: white;
+}
+
+.btn-primary:hover {
+    transform: translateY(-2px);
+    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
+}
+
+.btn-secondary {
+    background: #f7fafc;
+    color: #4a5568;
+    border: 2px solid #e2e8f0;
+}
+
+.btn-secondary:hover {
+    background: #edf2f7;
+    border-color: #cbd5e0;
+}
+
+.btn-small {
+    padding: 8px 16px;
+    font-size: 14px;
+}
+
+/* Back Button */
+.back-btn {
+    display: inline-block;
+    margin-bottom: 20px;
+    color: #667eea;
+    cursor: pointer;
+    font-weight: 600;
+    transition: color 0.3s ease;
+}
+
+.back-btn:hover {
+    color: #5a67d8;
+}
+
+/* List Containers */
+.list-container {
+    max-height: 400px;
+    overflow-y: auto;
+    border: 1px solid #e2e8f0;
+    border-radius: 10px;
+    padding: 10px;
+    overflow-x: hidden;
+    width: 100%;
+    box-sizing: border-box;
+}
+
+.list-item {
+    padding: 15px;
+    border-bottom: 1px solid #f1f5f9;
+    cursor: pointer;
+    transition: background-color 0.2s ease;
+    word-wrap: break-word;
+    overflow-wrap: break-word;
+}
+
+.list-item:hover {
+    background-color: #f8fafc;
+}
+
+.list-item:last-child {
+    border-bottom: none;
+}
+
+.list-item strong {
+    display: block;
+    color: #2d3748;
+    margin-bottom: 4px;
+}
+
+.list-item small {
+    color: #718096;
+}
+
+/* Checkbox List Items */
+.list-item-checkbox {
+    display: flex;
+    align-items: center;
+    padding: 15px;
+    border-bottom: 1px solid #f1f5f9;
+    transition: background-color 0.2s ease;
+    width: 100%;
+    box-sizing: border-box;
+    word-wrap: break-word;
+    overflow-wrap: break-word;
+}
+
+.list-item-checkbox:hover {
+    background-color: #f8fafc;
+}
+
+.list-item-checkbox.selected {
+    background-color: #ebf8ff;
+    border-color: #bee3f8;
+}
+
+.list-item-checkbox:last-child {
+    border-bottom: none;
+}
+
+.list-item-checkbox input[type="checkbox"] {
+    margin-right: 15px;
+    transform: scale(1.2);
+    flex-shrink: 0;
+}
+
+.item-content {
+    flex: 1;
+    min-width: 0;
+}
+
+.item-content strong {
+    display: block;
+    color: #2d3748;
+    margin-bottom: 4px;
+    word-wrap: break-word;
+    overflow-wrap: break-word;
+}
+
+.item-content small {
+    color: #718096;
+}
+
+.item-actions {
+    margin-left: 15px;
+    flex-shrink: 0;
+}
+
+/* Batch Controls */
+.batch-controls {
+    margin-bottom: 20px;
+    padding: 15px;
+    background-color: #f7fafc;
+    border-radius: 10px;
+    border: 1px solid #e2e8f0;
+    display: flex;
+    gap: 10px;
+    flex-wrap: wrap;
+    align-items: center;
+}
+
+.selected-count {
+    margin-left: auto;
+    font-weight: 600;
+    color: #4a5568;
+}
+
+/* Progress Bar */
+.progress-bar {
+    width: 100%;
+    height: 20px;
+    background: #e2e8f0;
+    border-radius: 10px;
+    overflow: hidden;
+    margin-bottom: 15px;
+}
+
+.progress-fill {
+    height: 100%;
+    background: linear-gradient(90deg, #48bb78, #38a169);
+    width: 0%;
+    transition: width 0.5s ease;
+}
+
+#progress-text {
+    text-align: center;
+    font-weight: 600;
+    color: #4a5568;
+    margin-bottom: 20px;
+}
+
+/* Results Log */
+.results-log {
+    max-height: 300px;
+    overflow-y: auto;
+    background: #f7fafc;
+    border: 1px solid #e2e8f0;
+    border-radius: 10px;
+    padding: 15px;
+    font-family: 'Monaco', 'Menlo', monospace;
+    font-size: 14px;
+}
+
+.log-entry {
+    margin-bottom: 8px;
+    padding: 4px 0;
+}
+
+.log-info {
+    color: #4a5568;
+}
+
+.log-success {
+    color: #38a169;
+    font-weight: 600;
+}
+
+.log-error {
+    color: #e53e3e;
+    font-weight: 600;
+}
+
+/* Loading Animation */
+.loading {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: rgba(0, 0, 0, 0.8);
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    z-index: 1000;
+    color: white;
+}
+
+.loading.hidden {
+    display: none !important;
+}
+
+.spinner {
+    width: 50px;
+    height: 50px;
+    border: 4px solid rgba(255, 255, 255, 0.3);
+    border-top: 4px solid #fff;
+    border-radius: 50%;
+    animation: spin 1s linear infinite;
+    margin-bottom: 20px;
+}
+
+@keyframes spin {
+    0% { transform: rotate(0deg); }
+    100% { transform: rotate(360deg); }
+}
+
+.loading p {
+    font-size: 18px;
+    font-weight: 600;
+}
+
+/* Responsive Design */
+@media (max-width: 600px) {
+    .container {
+        padding: 15px;
+    }
+    
+    header h1 {
+        font-size: 2rem;
+    }
+    
+    .section {
+        padding: 20px;
+    }
+    
+    .list-item-checkbox {
+        flex-direction: column;
+        align-items: flex-start;
+        gap: 10px;
+    }
+    
+    .item-actions {
+        margin-left: 0;
+        width: 100%;
+    }
+    
+    .item-actions .btn {
+        width: 100%;
+    }
+    
+    .batch-controls {
+        flex-direction: column;
+        align-items: stretch;
+    }
+    
+    .batch-controls .btn {
+        width: 100%;
+        margin-bottom: 10px;
+    }
+    
+    .batch-controls .btn:last-child {
+        margin-bottom: 0;
+    }
+    
+    .selected-count {
+        margin-left: 0;
+        text-align: center;
+    }
+}
\ No newline at end of file
diff --git a/server.js b/server.js
new file mode 100644
index 0000000..6fcc7d9
--- /dev/null
+++ b/server.js
@@ -0,0 +1,326 @@
+const express = require('express');
+const axios = require('axios');
+const cors = require('cors');
+const crypto = require('crypto');
+
+const app = express();
+const PORT = 3000;
+
+// Configuration
+const ZYBOOKS_CONFIG = {
+    BASE_URL: 'https://zyserver.zybooks.com/v1',
+    TIME_URL: 'https://zyserver2.zybooks.com/v1',
+    LEARN_URL: 'https://learn.zybooks.com',
+    HEADERS: {
+        'Host': 'zyserver.zybooks.com',
+        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0',
+        'Accept': 'application/json, text/javascript, */*; q=0.01',
+        'Accept-Language': 'en-US,en;q=0.5',
+        'Content-Type': 'application/json',
+        'Origin': 'https://learn.zybooks.com',
+        'Referer': 'https://learn.zybooks.com/'
+    }
+};
+
+// Middleware
+app.use(cors());
+app.use(express.json());
+app.use(express.static('public'));
+
+// Global error handlers
+process.on('uncaughtException', (error) => {
+    console.error('Uncaught Exception:', error);
+});
+
+process.on('unhandledRejection', (reason, promise) => {
+    console.error('Unhandled Rejection at:', promise, 'reason:', reason);
+});
+
+// ==================== UTILITY FUNCTIONS ====================
+
+function generateTimestamp(timeSpent = 0) {
+    const now = new Date();
+    const future = new Date(now.getTime() + timeSpent * 1000);
+    const ms = String(Math.floor(Math.random() * 1000)).padStart(3, '0');
+    return future.toISOString().replace(/\.\d{3}Z$/, `${ms}Z`);
+}
+
+function generateChecksum(actId, timestamp, auth, part, buildkey) {
+    const data = `content_resource/${actId}/activity${timestamp}${auth}${actId}${part}true${buildkey}`;
+    return crypto.createHash('md5').update(data).digest('hex');
+}
+
+async function getBuildkey(axiosInstance) {
+    const response = await axiosInstance.get(ZYBOOKS_CONFIG.LEARN_URL);
+    const match = response.data.match(/zybooks-web\/config\/environment[^>]*content="([^"]*)/);
+    const decoded = decodeURIComponent(match[1]);
+    const config = JSON.parse(decoded);
+    return config.APP.BUILDKEY;
+}
+
+async function calculateSectionParts(bookCode, chapterNumber, sectionNumber, authToken, axiosInstance) {
+    try {
+        const problemsResponse = await axiosInstance.get(
+            `${ZYBOOKS_CONFIG.BASE_URL}/zybook/${bookCode}/chapter/${chapterNumber}/section/${sectionNumber}?auth_token=${authToken}`
+        );
+        
+        if (!problemsResponse.data || !problemsResponse.data.section) {
+            throw new Error('Invalid response: missing section data');
+        }
+        
+        const problems = problemsResponse.data.section.content_resources;
+        if (!problems || !Array.isArray(problems)) {
+            throw new Error('Invalid response: missing or invalid content_resources');
+        }
+        
+        const totalParts = problems.reduce((total, problem) => total + Math.max(problem.parts, 1), 0);
+        return { problems, totalParts };
+    } catch (error) {
+        console.error('Error in calculateSectionParts:', error.message);
+        throw error;
+    }
+}
+
+// Error response helper
+function sendError(res, statusCode, message) {
+    console.error(`Error [${statusCode}]:`, message);
+    res.status(statusCode).json({ success: false, message });
+}
+
+// SSE message helpers
+function sendSSEMessage(res, type, data) {
+    res.write(`data: ${JSON.stringify({ type, ...data })}\n\n`);
+}
+
+// Core function to solve a single part
+async function solvePart(actId, secId, auth, part, code, axiosInstance, timeSpent = 0) {
+    // Simulate time spent
+    const spentTime = Math.floor(Math.random() * 60) + 1;
+    const newTimeSpent = timeSpent + spentTime;
+    
+    // Send time record
+    await axiosInstance.post(`${ZYBOOKS_CONFIG.TIME_URL}/zybook/${code}/time_spent`, {
+        time_spent_records: [{
+            canonical_section_id: secId,
+            content_resource_id: actId,
+            part: part,
+            time_spent: spentTime,
+            timestamp: generateTimestamp(newTimeSpent)
+        }],
+        auth_token: auth
+    });
+    
+    // Get buildkey and generate checksum
+    const buildkey = await getBuildkey(axiosInstance);
+    const timestamp = generateTimestamp(newTimeSpent);
+    const checksum = generateChecksum(actId, timestamp, auth, part, buildkey);
+    
+    // Solve the problem
+    const response = await axiosInstance.post(
+        `${ZYBOOKS_CONFIG.BASE_URL}/content_resource/${actId}/activity`,
+        {
+            part: part,
+            complete: true,
+            metadata: "{}",
+            zybook_code: code,
+            auth_token: auth,
+            timestamp: timestamp,
+            __cs__: checksum
+        },
+        { headers: ZYBOOKS_CONFIG.HEADERS }
+    );
+    
+    return { success: response.data.success || false, timeSpent: newTimeSpent };
+}
+
+// ==================== API ROUTES ====================
+
+// Login
+app.post('/api/auth/login', async (req, res) => {
+    try {
+        const { email, password } = req.body;
+        if (!email || !password) {
+            return sendError(res, 400, 'Email and password are required');
+        }
+        
+        const tempSession = axios.create();
+        const response = await tempSession.post(`${ZYBOOKS_CONFIG.BASE_URL}/signin`, { email, password });
+        
+        if (!response.data.success || !response.data.session) {
+            return sendError(res, 401, 'Invalid credentials');
+        }
+        
+        res.json({
+            success: true,
+            auth_token: response.data.session.auth_token,
+            user_id: response.data.session.user_id
+        });
+    } catch (error) {
+        sendError(res, 500, 'Login failed - Server error');
+    }
+});
+
+// Get books
+app.get('/api/books/:userId', async (req, res) => {
+    try {
+        const { userId } = req.params;
+        const { auth_token } = req.query;
+        
+        if (!userId || !auth_token) {
+            return sendError(res, 400, 'User ID and auth token are required');
+        }
+        
+        const axiosInstance = axios.create();
+        const response = await axiosInstance.get(
+            `${ZYBOOKS_CONFIG.BASE_URL}/user/${userId}/items?items=%5B%22zybooks%22%5D&auth_token=${auth_token}`
+        );
+        
+        const books = response.data.items.zybooks.filter(book => !book.autosubscribe);
+        res.json({ success: true, books });
+    } catch (error) {
+        sendError(res, 500, 'Failed to get books');
+    }
+});
+
+// Get chapters
+app.get('/api/chapters/:bookCode', async (req, res) => {
+    try {
+        const { bookCode } = req.params;
+        const { auth_token } = req.query;
+        
+        if (!bookCode || !auth_token) {
+            return sendError(res, 400, 'Book code and auth token are required');
+        }
+        
+        const axiosInstance = axios.create();
+        const response = await axiosInstance.get(
+            `${ZYBOOKS_CONFIG.BASE_URL}/zybooks?zybooks=%5B%22${bookCode}%22%5D&auth_token=${auth_token}`
+        );
+        
+        res.json({ success: true, chapters: response.data.zybooks[0].chapters });
+    } catch (error) {
+        sendError(res, 500, 'Failed to get chapters');
+    }
+});
+
+// Get section parts count
+app.get('/api/section-parts/:bookCode/:chapterNumber/:sectionNumber', async (req, res) => {
+    try {
+        const { bookCode, chapterNumber, sectionNumber } = req.params;
+        const { auth_token } = req.query;
+        
+        if (!bookCode || !chapterNumber || !sectionNumber || !auth_token) {
+            return sendError(res, 400, 'Missing required parameters');
+        }
+        
+        const axiosInstance = axios.create();
+        const { totalParts } = await calculateSectionParts(bookCode, chapterNumber, sectionNumber, auth_token, axiosInstance);
+        
+        res.json({ success: true, totalParts });
+    } catch (error) {
+        sendError(res, 500, 'Failed to get section parts');
+    }
+});
+
+// Solve section with SSE
+app.post('/api/solve/section', async (req, res) => {
+    // Set SSE headers
+    res.writeHead(200, {
+        'Content-Type': 'text/event-stream',
+        'Cache-Control': 'no-cache',
+        'Connection': 'keep-alive',
+        'Access-Control-Allow-Origin': '*'
+    });
+
+    try {
+        const { bookCode, chapter, section, auth, timeSpent = 0 } = req.body;
+        
+        if (!bookCode || !chapter || !section || !auth) {
+            sendSSEMessage(res, 'error', { message: 'Missing required parameters' });
+            return res.end();
+        }
+        
+        console.log(`Solving section: ${chapter.number}.${section.number}`);
+        
+        const axiosInstance = axios.create();
+        let currentTimeSpent = timeSpent;
+        
+        // Send start message
+        sendSSEMessage(res, 'start', { 
+            message: `Starting section: ${chapter.number}.${section.number} - ${section.title}` 
+        });
+        
+        // Get problems and total parts
+        const { problems, totalParts } = await calculateSectionParts(bookCode, chapter.number, section.number, auth, axiosInstance);
+        sendSSEMessage(res, 'total', { total: totalParts });
+
+        let currentPart = 0;
+        let results = [];
+        
+        // Process each problem
+        for (let i = 0; i < problems.length; i++) {
+            const problem = problems[i];
+            const parts = Math.max(problem.parts, 1);
+            
+            // Process each part
+            for (let partIndex = 0; partIndex < parts; partIndex++) {
+                currentPart++;
+                const partNum = partIndex + 1;
+                const actualPartIndex = problem.parts > 0 ? partIndex : 0;
+                
+                // Send progress
+                const progressMessage = parts > 1 
+                    ? `Solving problem ${i + 1} part ${partNum}...`
+                    : `Solving problem ${i + 1}...`;
+                sendSSEMessage(res, 'progress', { 
+                    current: currentPart, 
+                    total: totalParts, 
+                    message: progressMessage 
+                });
+                
+                // Solve the part
+                const result = await solvePart(problem.id, section.canonical_section_id, auth, actualPartIndex, bookCode, axiosInstance, currentTimeSpent);
+                currentTimeSpent = result.timeSpent; // Update time spent
+                
+                results.push({ problem: i + 1, part: partNum, success: result.success });
+                
+                // Send result
+                sendSSEMessage(res, 'result', {
+                    current: currentPart,
+                    total: totalParts,
+                    problem: i + 1,
+                    part: partNum,
+                    success: result.success,
+                    timeSpent: currentTimeSpent,
+                    message: result.success 
+                        ? `✅ Problem ${i + 1} part ${partNum} solved successfully` 
+                        : `❌ Problem ${i + 1} part ${partNum} failed`
+                });
+                
+                console.log(`Problem ${i + 1}, Part ${partNum}: ${result.success ? 'Success' : 'Failed'}`);
+                await new Promise(resolve => setTimeout(resolve, 500));
+            }
+        }
+        
+        // Send completion
+        const successCount = results.filter(r => r.success).length;
+        sendSSEMessage(res, 'complete', {
+            results,
+            successCount,
+            totalCount: results.length,
+            finalTimeSpent: currentTimeSpent,
+            message: `Completed! ${successCount}/${results.length} problems solved successfully`
+        });
+        
+        res.end();
+    } catch (error) {
+        console.error('Section solving error:', error.message);
+        sendSSEMessage(res, 'error', { message: `Error solving section: ${error.message}` });
+        res.end();
+    }
+});
+
+// Start server
+app.listen(PORT, () => {
+    console.log(`🚀 ZyBook Auto Server running on http://localhost:${PORT}`);
+});