Better NotebookLM

Enhanced NotebookLM: Auto-collapse sidebar, resizable Studio panel, UI improvements

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Better NotebookLM
// @namespace    http://tampermonkey.net/
// @version      0.7
// @description  Enhanced NotebookLM: Auto-collapse sidebar, resizable Studio panel, UI improvements
// @author       djshigel
// @license      MIT
// @match        https://notebooklm.google.com/*
// @match        https://notebooklm.google/*
// @icon         https://notebooklm.google.com/favicon.ico
// @grant        none
// @run-at       document-idle
// ==/UserScript==

(function() {
    'use strict';

    const CONFIG = {
        defaultStudioWidth: 30, // Default Studio panel width (%)
        expandStudioWidth: 53, // Width to expand Studio panel when min-inline-size is detected (%)
        minPanelWidth: 20, // Minimum panel width (%)
        maxPanelWidth: 80, // Maximum panel width (%)
        dragHandleWidth: 8, // Drag handle width (px)
        rightPanelOffset: 88, // Fixed offset to prevent right panel overflow (px)
        sourcePanelWidth: 395, // Source panel width when expanded (px)
    };

    // ========================
    // Auto-collapse sidebar
    // ========================
    
    function collapseSidebar() {
        const panel = document.querySelector('section.source-panel:not(.panel-collapsed)');
        
        if (panel) {
            const toggleButton = panel.querySelector('button.toggle-source-panel-button');
            
            if (toggleButton) {
                toggleButton.click();
                console.log('Better NotebookLM: Sidebar collapsed');
                return true;
            }
        }
        
        const collapsedPanel = document.querySelector('section.source-panel.panel-collapsed');
        if (collapsedPanel) {
            return true;
        }
        
        return false;
    }

    // ========================
    // Studio panel resizer
    // ========================
    
    let dragHandlers = {
        mousedown: null,
        mousemove: null,
        mouseup: null
    };
    
    let resizerInitialized = false;
    
    function destroyStudioResizer() {
        const studioPanel = document.querySelector('section.studio-panel, [class*="studio"], [class*="right-panel"]');
        const gutter = studioPanel?.previousElementSibling;
        const chatPanel = gutter?.previousElementSibling;
        
        if (gutter && gutter.dataset.resizerInitialized) {
            // Remove event listeners
            if (dragHandlers.mousedown) {
                gutter.removeEventListener('mousedown', dragHandlers.mousedown);
            }
            if (dragHandlers.mousemove) {
                document.removeEventListener('mousemove', dragHandlers.mousemove);
            }
            if (dragHandlers.mouseup) {
                document.removeEventListener('mouseup', dragHandlers.mouseup);
            }
            
            // Reset gutter styles
            gutter.style.cursor = '';
            gutter.style.backgroundColor = '';
            gutter.style.width = '';
            delete gutter.dataset.resizerInitialized;
            
            // Remove ALL custom styles from panels
            if (studioPanel) {
                studioPanel.removeAttribute('style');
            }
            if (chatPanel) {
                chatPanel.removeAttribute('style');
            }
            
            // Reset initialization flag
            resizerInitialized = false;
            
            console.log('Better NotebookLM: Studio resizer destroyed');
        }
    }
    
    function observeStudioCollapse() {
        let lastCollapseState = null;
        let lastSourceCollapseState = null;
        
        const observer = new MutationObserver(() => {
            const studioPanel = document.querySelector('section.studio-panel, [class*="studio"], [class*="right-panel"]');
            if (!studioPanel) return;
            
            // Check for min-inline-size and handle appropriately
            if (studioPanel.style.minInlineSize) {
                const minInlineValue = studioPanel.style.minInlineSize;
                
                // Always remove min-inline-size
                studioPanel.style.minInlineSize = '';
                
                // Only expand for specific large values (like 37.5vw that NotebookLM uses)
                // This indicates actual content like video or report is being shown
                if ((minInlineValue.includes('vw') && parseFloat(minInlineValue) >= 30) ||
                    (minInlineValue.includes('%') && parseFloat(minInlineValue) >= 40)) {
                    
                    if (!studioPanel.classList.contains('panel-collapsed')) {
                        // Add transition for smooth animation
                        const chatPanel = document.querySelector('section.chat-panel');
                        if (chatPanel) {
                            studioPanel.style.transition = 'all 0.3s ease';
                            chatPanel.style.transition = 'all 0.3s ease';
                        }
                        
                        // Apply expanded width using helper function (considers source panel state)
                        applyStudioWidth(studioPanel, CONFIG.expandStudioWidth);
                        
                        // Save the expanded width
                        localStorage.setItem('betterNotebookLM_studioWidth', CONFIG.expandStudioWidth.toString());
                        
                        // Remove transition after animation
                        setTimeout(() => {
                            studioPanel.style.transition = '';
                            if (chatPanel) chatPanel.style.transition = '';
                        }, 300);
                        
                        console.log(`Better NotebookLM: Detected ${minInlineValue} - expanded Studio to ${CONFIG.expandStudioWidth}%`);
                    }
                } else {
                    console.log(`Better NotebookLM: Removed min-inline-size (${minInlineValue})`);
                }
            }
            
            const isCollapsed = studioPanel.classList.contains('panel-collapsed');
            
            // Check source panel state
            const sourcePanel = document.querySelector('section.source-panel');
            const isSourceCollapsed = sourcePanel?.classList.contains('panel-collapsed') ?? true;
            
            // Only act if state actually changed
            if (lastCollapseState !== isCollapsed || lastSourceCollapseState !== isSourceCollapsed) {
                lastCollapseState = isCollapsed;
                lastSourceCollapseState = isSourceCollapsed;
                
                if (isCollapsed) {
                    // Destroy resizer when collapsed
                    destroyStudioResizer();
                    
                    // Remove flex and max-width from chat panel when Studio is collapsed
                    const chatPanel = document.querySelector('section.chat-panel');
                    if (chatPanel) {
                        chatPanel.style.flex = '';
                        chatPanel.style.maxWidth = '';
                        console.log('Better NotebookLM: Removed chat panel custom styles on Studio collapse');
                    }
                    
                    console.log('Better NotebookLM: Studio collapsed - resizer destroyed, width forced to 56px');
                } else {
                    // Re-initialize resizer when expanded
                    setTimeout(() => {
                        resizerInitialized = false; // Reset flag before re-initializing
                        resizerInitialized = initStudioResizer();
                        
                        // Restore saved size if available (initStudioResizer already does this, but ensure it's applied)
                        const savedWidth = localStorage.getItem('betterNotebookLM_studioWidth');
                        if (savedWidth) {
                            // Use the helper function to ensure width is applied
                            if (applyStudioWidth(studioPanel, savedWidth)) {
                                console.log(`Better NotebookLM: Studio expanded - width restored to ${savedWidth}%`);
                            }
                        }
                        
                        if (resizerInitialized) {
                            console.log('Better NotebookLM: Studio expanded - resizer restored');
                        }
                    }, 100);
                }
                
                // When source panel state changes, re-apply Studio width to ensure proper layout
                if (!isCollapsed) {
                    // Use multiple timeouts to ensure layout has settled after source panel animation
                    const savedWidth = localStorage.getItem('betterNotebookLM_studioWidth');
                    if (savedWidth) {
                        // Immediate apply
                        applyStudioWidth(studioPanel, savedWidth);
                        
                        // Re-apply after short delay
                        setTimeout(() => {
                            applyStudioWidth(studioPanel, savedWidth);
                        }, 50);
                        
                        // Re-apply after medium delay
                        setTimeout(() => {
                            applyStudioWidth(studioPanel, savedWidth);
                            console.log(`Better NotebookLM: Source panel state changed (${isSourceCollapsed ? 'closed' : 'open'}) - Studio width reapplied to ${savedWidth}%`);
                        }, 200);
                        
                        // Re-apply after longer delay to catch any late layout changes
                        setTimeout(() => {
                            applyStudioWidth(studioPanel, savedWidth);
                        }, 500);
                    }
                }
            }
        });
        
        // Observe the entire document for class changes
        observer.observe(document.body, {
            attributes: true,
            attributeFilter: ['class', 'style'],
            subtree: true
        });
        
        return observer;
    }
    
    function isSourcePanelOpen() {
        const sourcePanel = document.querySelector('section.source-panel');
        return sourcePanel && !sourcePanel.classList.contains('panel-collapsed');
    }
    
    function getSourcePanelWidth() {
        const sourcePanel = document.querySelector('section.source-panel');
        if (!sourcePanel) return 0;
        // Get actual width, not fixed value
        return sourcePanel.offsetWidth || (isSourcePanelOpen() ? CONFIG.sourcePanelWidth : 0);
    }
    
    function getAvailableWidth() {
        // Get the actual container that holds chat and Studio panels
        const studioPanel = document.querySelector('section.studio-panel, [class*="studio"], [class*="right-panel"]');
        const chatPanel = document.querySelector('section.chat-panel');
        
        if (!studioPanel || !chatPanel) return window.innerWidth;
        
        // Find common parent container
        let container = studioPanel.parentElement;
        while (container && container !== document.body) {
            if (container.contains(studioPanel) && container.contains(chatPanel)) {
                // Check if this is the direct container (both panels are direct children or in same flex container)
                const children = Array.from(container.children);
                const hasBothPanels = children.some(child => 
                    child === chatPanel || child === studioPanel || 
                    child.contains(chatPanel) || child.contains(studioPanel)
                );
                if (hasBothPanels) {
                    break;
                }
            }
            container = container.parentElement;
        }
        
        // If container not found, use window width minus source panel
        if (!container || container === document.body) {
            return window.innerWidth - getSourcePanelWidth();
        }
        
        // Get actual container width
        const containerWidth = container.offsetWidth || container.clientWidth;
        return containerWidth;
    }
    
    function applyStudioWidth(studioPanel, widthPercent) {
        if (!studioPanel || studioPanel.classList.contains('panel-collapsed')) return false;
        
        const gutter = studioPanel.previousElementSibling;
        const chatPanel = gutter?.previousElementSibling;
        
        if (!chatPanel) return false;
        
        // Wait a bit for layout to settle
        requestAnimationFrame(() => {
            requestAnimationFrame(() => {
                const widthValue = parseFloat(widthPercent);
                
                // Get the actual container that holds both panels
                let container = studioPanel.parentElement;
                while (container && container !== document.body) {
                    if (container.contains(chatPanel) && container.contains(studioPanel)) {
                        break;
                    }
                    container = container.parentElement;
                }
                
                if (!container || container === document.body) {
                    console.warn('Better NotebookLM: Could not find container');
                    return;
                }
                
                // Get actual container width
                const containerWidth = container.offsetWidth || container.clientWidth;
                if (!containerWidth || containerWidth === 0) {
                    console.warn('Better NotebookLM: Container width is 0');
                    return;
                }
                
                // Calculate pixel widths based on container width
                const studioWidthPx = Math.floor((containerWidth * widthValue / 100) - CONFIG.rightPanelOffset);
                const chatWidthPx = Math.floor(containerWidth - studioWidthPx - CONFIG.rightPanelOffset);
                
                // Apply widths with !important to override any other styles
                studioPanel.style.setProperty('flex', '0 0 auto', 'important');
                studioPanel.style.setProperty('max-width', `${studioWidthPx}px`, 'important');
                studioPanel.style.setProperty('width', `${studioWidthPx}px`, 'important');
                studioPanel.style.setProperty('min-width', `${studioWidthPx}px`, 'important');
                
                chatPanel.style.setProperty('flex', '0 0 auto', 'important');
                chatPanel.style.setProperty('max-width', `${chatWidthPx}px`, 'important');
                chatPanel.style.setProperty('width', `${chatWidthPx}px`, 'important');
                chatPanel.style.setProperty('min-width', `${chatWidthPx}px`, 'important');
                
                const sourcePanelOpen = isSourcePanelOpen();
                console.log(`Better NotebookLM: Applied Studio width - ${widthValue}% of ${containerWidth}px container (source ${sourcePanelOpen ? 'open' : 'closed'}) = ${studioWidthPx}px, chat = ${chatWidthPx}px`);
            });
        });
        
        return true;
    }
    
    function initStudioResizer() {
        // Find the gutter between chat and Studio panels
        const studioPanel = document.querySelector('section.studio-panel, [class*="studio"], [class*="right-panel"]');
        if (!studioPanel) return false;
        
        // Don't initialize if Studio is collapsed
        if (studioPanel.classList.contains('panel-collapsed')) {
            console.log('Better NotebookLM: Studio is collapsed, skipping resizer init');
            return false;
        }
        
        // Find the gutter that's immediately before the Studio panel
        const gutter = studioPanel.previousElementSibling;
        if (!gutter || !gutter.classList.contains('panel-gutter')) return false;
        
        // Get chat panel
        const chatPanel = gutter.previousElementSibling;
        if (!chatPanel) return false;
        
        // Skip if already initialized
        if (gutter.dataset.resizerInitialized) {
            // Re-apply saved width even if already initialized
            const savedWidth = localStorage.getItem('betterNotebookLM_studioWidth');
            if (savedWidth) {
                applyStudioWidth(studioPanel, savedWidth);
            }
            return true;
        }
        
        // Apply resize handle styles
        gutter.style.cursor = 'col-resize';
        gutter.style.position = 'relative';
        gutter.style.userSelect = 'none';
        gutter.style.width = CONFIG.dragHandleWidth + 'px';
        gutter.style.backgroundColor = 'transparent';
        gutter.style.transition = 'background-color 0.2s';
        
        // Visual feedback on hover
        gutter.addEventListener('mouseenter', () => {
            gutter.style.backgroundColor = 'rgba(66, 133, 244, 0.2)';
        });
        
        gutter.addEventListener('mouseleave', () => {
            if (!gutter.dataset.dragging) {
                gutter.style.backgroundColor = 'transparent';
            }
        });
        
        // Drag handling
        let isDragging = false;
        let startX = 0;
        let startRightWidth = 0;
        let rightPanel = studioPanel;
        let container = null;
        
        const handleMouseDown = (e) => {
            isDragging = true;
            startX = e.clientX;
            gutter.dataset.dragging = 'true';
            gutter.style.backgroundColor = 'rgba(66, 133, 244, 0.4)';
            
            // Find the actual container
            let containerElement = rightPanel.parentElement;
            while (containerElement && containerElement !== document.body) {
                if (containerElement.contains(chatPanel) && containerElement.contains(rightPanel)) {
                    break;
                }
                containerElement = containerElement.parentElement;
            }
            container = containerElement;
            
            if (rightPanel && container) {
                // Get actual container width
                const containerWidth = container.offsetWidth || container.clientWidth;
                if (containerWidth > 0) {
                    startRightWidth = (rightPanel.offsetWidth / containerWidth) * 100;
                }
            }
            
            // Prevent cursor and text selection during drag
            document.body.style.cursor = 'col-resize';
            document.body.style.userSelect = 'none';
            
            // Add overlay to prevent iframe interference
            const overlay = document.createElement('div');
            overlay.id = 'resize-overlay';
            overlay.style.cssText = `
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                z-index: 9999;
                cursor: col-resize;
            `;
            document.body.appendChild(overlay);
            
            e.preventDefault();
        };
        
        const handleMouseMove = (e) => {
            if (!isDragging || !chatPanel || !rightPanel || !container) return;
            
            // Get actual container width
            const containerWidth = container.offsetWidth || container.clientWidth;
            if (!containerWidth || containerWidth === 0) return;
            
            const deltaX = e.clientX - startX;
            const deltaPercent = (deltaX / containerWidth) * 100;
            let newRightWidth = startRightWidth - deltaPercent;
            
            // Limit width
            newRightWidth = Math.max(CONFIG.minPanelWidth, Math.min(CONFIG.maxPanelWidth, newRightWidth));
            
            // Calculate pixel widths
            const studioWidthPx = Math.floor((containerWidth * newRightWidth / 100) - CONFIG.rightPanelOffset);
            const chatWidthPx = Math.floor(containerWidth - studioWidthPx - CONFIG.rightPanelOffset);
            
            // Update panel sizes using pixel values with !important
            chatPanel.style.setProperty('flex', '0 0 auto', 'important');
            chatPanel.style.setProperty('max-width', `${chatWidthPx}px`, 'important');
            chatPanel.style.setProperty('width', `${chatWidthPx}px`, 'important');
            chatPanel.style.setProperty('min-width', `${chatWidthPx}px`, 'important');
            
            rightPanel.style.setProperty('flex', '0 0 auto', 'important');
            rightPanel.style.setProperty('max-width', `${studioWidthPx}px`, 'important');
            rightPanel.style.setProperty('width', `${studioWidthPx}px`, 'important');
            rightPanel.style.setProperty('min-width', `${studioWidthPx}px`, 'important');
            
            // Save percentage to localStorage (relative to container width)
            localStorage.setItem('betterNotebookLM_studioWidth', newRightWidth.toString());
            
            e.preventDefault();
        };
        
        const handleMouseUp = () => {
            if (!isDragging) return;
            
            isDragging = false;
            delete gutter.dataset.dragging;
            gutter.style.backgroundColor = 'transparent';
            
            // Restore cursor and text selection
            document.body.style.cursor = '';
            document.body.style.userSelect = '';
            
            // Remove overlay
            const overlay = document.getElementById('resize-overlay');
            if (overlay) overlay.remove();
        };
        
        // Store handlers globally for cleanup
        dragHandlers.mousedown = handleMouseDown;
        dragHandlers.mousemove = handleMouseMove;
        dragHandlers.mouseup = handleMouseUp;
        
        gutter.addEventListener('mousedown', handleMouseDown);
        document.addEventListener('mousemove', handleMouseMove);
        document.addEventListener('mouseup', handleMouseUp);
        
        // Mark as initialized
        gutter.dataset.resizerInitialized = 'true';
        
        // Apply saved width
        const savedWidth = localStorage.getItem('betterNotebookLM_studioWidth');
        if (savedWidth) {
            applyStudioWidth(studioPanel, savedWidth);
        }
        
        console.log('Better NotebookLM: Studio resizer initialized');
        return true;
    }

    // ========================
    // Main processing
    // ========================
    
    let sidebarProcessed = false;
    let retryCount = 0;
    const maxRetries = 20;
    
    function processElements() {
        // Process sidebar
        if (!sidebarProcessed) {
            sidebarProcessed = collapseSidebar();
        }
        
        // Initialize Studio resizer
        if (!resizerInitialized) {
            const studioPanel = document.querySelector('section.studio-panel, [class*="studio"], [class*="right-panel"]');
            
            // If Studio exists and is collapsed, mark as complete but don't initialize
            if (studioPanel && studioPanel.classList.contains('panel-collapsed')) {
                resizerInitialized = true;
                console.log('Better NotebookLM: Studio is collapsed, skipping resizer');
            } else {
                resizerInitialized = initStudioResizer();
            }
        }
        
        // Check completion
        if ((sidebarProcessed && resizerInitialized) || retryCount >= maxRetries) {
            if (retryCount >= maxRetries) {
                console.log('Better NotebookLM: Maximum retries reached');
            } else {
                console.log('Better NotebookLM: All features enabled');
            }
            return true;
        }
        
        return false;
    }
    
    // Periodic element check
    const checkInterval = setInterval(() => {
        retryCount++;
        
        if (processElements()) {
            clearInterval(checkInterval);
            // Start observing Studio collapse state after initialization
            observeStudioCollapse();
        }
    }, 500);
    
    // Handle page navigation
    let lastUrl = location.href;
    const urlObserver = new MutationObserver(() => {
        const currentUrl = location.href;
        if (currentUrl !== lastUrl) {
            lastUrl = currentUrl;
            console.log('Better NotebookLM: Page changed, reinitializing...');
            
            // Reset flags
            sidebarProcessed = false;
            resizerInitialized = false;
            retryCount = 0;
            
            setTimeout(() => {
                const retryInterval = setInterval(() => {
                    retryCount++;
                    
                    if (!sidebarProcessed) {
                        sidebarProcessed = collapseSidebar();
                    }
                    
                    if (!resizerInitialized) {
                        resizerInitialized = initStudioResizer();
                    }
                    
                    if ((sidebarProcessed && resizerInitialized) || retryCount >= 10) {
                        clearInterval(retryInterval);
                        observeStudioCollapse();
                    }
                }, 500);
            }, 1000);
        }
    });
    
    // Monitor URL changes
    urlObserver.observe(document.body, {
        childList: true,
        subtree: true
    });
    
    // ========================
    // Style injection
    // ========================
    
    const style = document.createElement('style');
    style.textContent = `
        /* Force logo margins */
        labs-tailwind-logo img {
            margin-left: 5px !important;
            margin-right: 5px !important;
        }
        
        /* Force Source panel expanded width */
        section.source-panel:not(.panel-collapsed) {
            width: 395px !important;
            min-width: 395px !important;
            max-width: 395px !important;
            flex: 0 0 395px !important;
        }
        
        /* Panel gutter hover effect */
        .panel-gutter[data-resizer-initialized="true"] {
            position: relative;
            z-index: 100;
        }
        
        .panel-gutter[data-resizer-initialized="true"]::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 3px;
            background: rgba(66, 133, 244, 0.5);
            opacity: 0;
            transition: opacity 0.2s;
        }
        
        .panel-gutter[data-resizer-initialized="true"]:hover::before {
            opacity: 1;
        }
        
        /* Disable animations during drag to prevent jitter */
        .panel-gutter[data-dragging="true"] ~ *,
        .panel-gutter[data-dragging="true"] ~ * * {
            transition: none !important;
        }
        
        /* Source panel collapsed state - hide scrollbar until hover */
        .source-panel.panel-collapsed .source-panel-content {
            overflow: hidden !important;
        }
        
        .source-panel.panel-collapsed .source-panel-content:hover {
            overflow-y: auto !important;
            overflow-x: hidden !important;
        }
        
        /* Force Studio panel width when collapsed */
        section.studio-panel.panel-collapsed,
        section[class*="studio"].panel-collapsed,
        section[class*="right-panel"].panel-collapsed {
            width: 56px !important;
            min-width: 56px !important;
            max-width: 56px !important;
            flex: 0 0 56px !important;
        }
        
        /* Remove min-inline-size from Studio panel */
        section.studio-panel,
        section[class*="studio"],
        section[class*="right-panel"] {
            min-inline-size: unset !important;
        }
        
        /* Chat panel should use available space when Studio is collapsed */
        section.chat-panel:has(~ .panel-collapsed) {
            flex: 1 1 auto !important;
            max-width: none !important;
        }
        
        /* Sticky Studio panel buttons to prevent overflow */
        .studio-panel button.toggle-studio-panel-button,
        .studio-panel button[aria-label*="Studio"],
        .studio-panel button[aria-label*="メモ"],
        .studio-panel button[aria-label*="note"] {
            position: sticky;
            right: 0;
            z-index: 10;
        }
        
        /* Studio panel header sticky positioning */
        .studio-panel .panel-header,
        .studio-panel .studio-header {
            position: sticky;
            top: 0;
            z-index: 10;
            background: inherit;
        }
    `;
    document.head.appendChild(style);
    
    console.log('Better NotebookLM: Initialization complete');
    
    // Additional monitoring for min-inline-size changes as a backup
    const styleObserver = new MutationObserver(() => {
        const studioPanel = document.querySelector('section.studio-panel, [class*="studio"], [class*="right-panel"]');
        if (studioPanel && studioPanel.style.minInlineSize) {
            const minInlineValue = studioPanel.style.minInlineSize;
            
            // Always remove min-inline-size
            studioPanel.style.minInlineSize = '';
            
            // Only expand for specific large values
            if ((minInlineValue.includes('vw') && parseFloat(minInlineValue) >= 30) ||
                (minInlineValue.includes('%') && parseFloat(minInlineValue) >= 40)) {
                
                if (!studioPanel.classList.contains('panel-collapsed')) {
                    // Add transition for smooth animation
                    const chatPanel = document.querySelector('section.chat-panel');
                    if (chatPanel) {
                        studioPanel.style.transition = 'all 0.3s ease';
                        chatPanel.style.transition = 'all 0.3s ease';
                    }
                    
                    // Apply expanded width using helper function (considers source panel state)
                    applyStudioWidth(studioPanel, CONFIG.expandStudioWidth);
                    
                    // Save the expanded width
                    localStorage.setItem('betterNotebookLM_studioWidth', CONFIG.expandStudioWidth.toString());
                    
                    // Remove transition after animation
                    setTimeout(() => {
                        studioPanel.style.transition = '';
                        if (chatPanel) chatPanel.style.transition = '';
                    }, 300);
                    
                    console.log(`Better NotebookLM (backup): Detected ${minInlineValue} - expanded to ${CONFIG.expandStudioWidth}%`);
                }
            }
        }
    });
    
    // Start monitoring after initial setup
    setTimeout(() => {
        const studioPanel = document.querySelector('section.studio-panel, [class*="studio"], [class*="right-panel"]');
        if (studioPanel) {
            styleObserver.observe(studioPanel, {
                attributes: true,
                attributeFilter: ['style']
            });
        }
    }, 2000);
    
    // Re-apply Studio width on window resize to ensure proper layout
    let resizeTimeout;
    window.addEventListener('resize', () => {
        clearTimeout(resizeTimeout);
        resizeTimeout = setTimeout(() => {
            const studioPanel = document.querySelector('section.studio-panel, [class*="studio"], [class*="right-panel"]');
            if (studioPanel && !studioPanel.classList.contains('panel-collapsed')) {
                const savedWidth = localStorage.getItem('betterNotebookLM_studioWidth');
                if (savedWidth) {
                    applyStudioWidth(studioPanel, savedWidth);
                    console.log(`Better NotebookLM: Window resized - Studio width reapplied to ${savedWidth}%`);
                }
            }
        }, 150);
    });
    
    // Use ResizeObserver to watch for container size changes
    let containerResizeObserver = null;
    function setupContainerResizeObserver() {
        const studioPanel = document.querySelector('section.studio-panel, [class*="studio"], [class*="right-panel"]');
        const chatPanel = document.querySelector('section.chat-panel');
        
        if (!studioPanel || !chatPanel) return;
        
        // Find the container
        let container = studioPanel.parentElement;
        while (container && container !== document.body) {
            if (container.contains(chatPanel) && container.contains(studioPanel)) {
                break;
            }
            container = container.parentElement;
        }
        
        if (!container || container === document.body) return;
        
        // Clean up existing observer
        if (containerResizeObserver) {
            containerResizeObserver.disconnect();
        }
        
        // Create new observer
        containerResizeObserver = new ResizeObserver(() => {
            if (studioPanel && !studioPanel.classList.contains('panel-collapsed')) {
                const savedWidth = localStorage.getItem('betterNotebookLM_studioWidth');
                if (savedWidth) {
                    // Debounce the resize observer
                    clearTimeout(resizeTimeout);
                    resizeTimeout = setTimeout(() => {
                        applyStudioWidth(studioPanel, savedWidth);
                        console.log(`Better NotebookLM: Container resized - Studio width reapplied to ${savedWidth}%`);
                    }, 100);
                }
            }
        });
        
        containerResizeObserver.observe(container);
        console.log('Better NotebookLM: Container resize observer set up');
    }
    
    // Set up resize observer after initial setup
    setTimeout(() => {
        setupContainerResizeObserver();
    }, 2000);
    
    // Re-setup observer when panels change
    const observerForResizeSetup = new MutationObserver(() => {
        const studioPanel = document.querySelector('section.studio-panel, [class*="studio"], [class*="right-panel"]');
        const chatPanel = document.querySelector('section.chat-panel');
        if (studioPanel && chatPanel && !containerResizeObserver) {
            setupContainerResizeObserver();
        }
    });
    
    observerForResizeSetup.observe(document.body, {
        childList: true,
        subtree: true
    });
    
})();