/*prevent FOUC on mobile when using sidebar */
.dwc-mobile :is(.bricks-is-frontend.brx-header-left, .bricks-is-frontend.brx-header-right) #brx-header {
  position: relative;
  inline-size: 100%;
  flex-direction: column;
}

.dwc-mobile .bricks-is-frontend:is(.brx-header-left, .brx-header-right) :is(#brx-content, #brx-footer) {
  margin-inline-start: 0;
}

/*prevent FOUC on desktop when using sidebar */
.bricks-is-frontend:is(.brx-header-left, .brx-header-right):not(.show-nav) #dwc_nav_wrapper {
  display: none;
}

/*=== sidebar css ===*/
html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header {
  flex-direction: column;
  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.7);  
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]).no-scroll {
  overflow: visible;
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header .dwc-nest-menu.brxe-nav-nested .brx-nav-nested-items {
  max-block-size: 100dvb;
  padding-block-end: 12rem;
  overscroll-behavior: contain;
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header #dwc_nav_wrapper {
  position: relative;
  overflow: hidden;
  block-size: 100%;
  transform: translateX(0%);
  visibility: visible;
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #dwc-nest-menu .brxe-toggle {
  display: none !important;
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header .dwc-nest-menu {
  display: flex;
  flex-direction: column;
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header .dwc-nest-header > div {
  display: flex;
  grid-template-columns: 1fr;
  block-size: 100%;
  flex-direction: column;
  justify-content: flex-start;
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header .dwc-menu-wrap {
  inline-size: 100%;
  display: grid;
  grid-template-columns: 1fr;
  block-size: 100%;
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header :is(.brxe-code, .dwc-nest-menu-overlay) {
  display: none;
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header .dwc-nest-header {
  inline-size: 100%;
  padding-inline: 0;
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header #mobile_menu_top {
  min-block-size: var(--top-offset);
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header #dwc-nest-menu:not( [data-hide-close-bar = 'true']) .brx-dropdown-content {
  inset-block-start: calc(var(--top-offset) + 1px) !important;

}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header #dwc-nest-menu:not( [data-submenu-reveal = 'slide']) .brx-dropdown-content:not([data-submenu-reveal = 'slide'] *) {  
  inset-inline-start: 0;
  inset-block-start: unset !important;
  overflow: hidden;
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header #dwc-nest-menu:not([data-submenu-reveal = 'slide']) .brxe-dropdown:not(.open.active) > .brx-dropdown-content > .brxe-dropdown:not([data-submenu-reveal = 'slide'] *){
  visibility: hidden;  
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header .dwc-nest-menu.brxe-nav-nested.brx-open .brxe-dropdown > .brx-dropdown-content {
  overscroll-behavior: contain;
  min-inline-size: var(--mobile-menu-width);

}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header #dwc-nest-menu .brxe-dropdown.open > .brx-submenu-toggle button:not([data-submenu-reveal = 'expand'] button)  {
  min-block-size: calc(var(--top-offset) - 1px);
  inset-block-start: 0;
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header #dwc-nest-menu .brxe-dropdown.open[data-submenu-reveal = 'slide'] > .brx-submenu-toggle button  {
  min-block-size: calc(var(--top-offset) - 1px);
  inset-block-start: 0;
}

html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header #dwc-nest-menu .brxe-dropdown .brx-submenu-toggle button {
  min-block-size: 0;    
}

/* sidebar css ends*/



/*sidebar in builder*/
/*=== sidebar css ===*/
:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header {
  flex-direction: column;
  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.7);
  --top-offset: 40px;
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header .dwc-nest-menu.brxe-nav-nested .brx-nav-nested-items {
  max-block-size: 100dvb;
  padding-block-end: 12rem;
  overscroll-behavior: contain;
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header #dwc_nav_wrapper {
  position: relative;
  overflow: hidden;
  block-size: 100%;
  transform: translateX(0%);
  visibility: visible;
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #dwc-nest-menu .brxe-toggle {
  display: none !important;
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header .dwc-nest-menu {
  display: flex;
  flex-direction: column;
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header .dwc-nest-header > div {
  display: flex;
  grid-template-columns: 1fr;
  block-size: 100%;
  flex-direction: column;
  justify-content: flex-start;
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header .dwc-menu-wrap {
  inline-size: 100%;
  display: grid;
  grid-template-columns: 1fr;
  block-size: 100%;
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header .dwc-nest-header {
  inline-size: 100%;
  padding-inline: 0;
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header #mobile_menu_top {
  min-block-size: var(--top-offset);
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header #dwc-nest-menu .brx-dropdown-content {
  inset-block-start: calc(var(--top-offset) - 1px) !important;
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header .dwc-nest-menu.brxe-nav-nested.brx-open .brxe-dropdown > .brx-dropdown-content {
  overscroll-behavior: contain;  
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header #dwc-nest-menu .brxe-dropdown.open > .brx-submenu-toggle button {
  min-block-size: calc(var(--top-offset) - 1px);
  inset-block-start: 0;
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header #dwc-nest-menu .brxe-dropdown .brx-submenu-toggle button {
  min-block-size: 0;    
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] .dwc-nest-menu {
  margin: 0 !important;
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] .brx-nav-nested-items {  
  flex-direction: column !important;  
}
   
:is(.brx-header-left, .brx-header-right)[data-builder-window] .dwc-nest-toggle--open.brxe-toggle {
  display: flex !important;
}
 
:is(.brx-header-left, .brx-header-right)[data-builder-window] .dwc-nest-menu .brx-nav-nested-items {
  position: relative !Important;
  background: var(--mobile-menu-bg) !important;
  align-items: stretch;
  flex: 1;
}
 
/* MENU CTA (LAST BUTTON) */
:is(.brx-header-left, .brx-header-right)[data-builder-window] [data-last-item-is-button="true"].dwc-nest-menu .brx-nav-nested-items > .menu-item:last-of-type {
  padding-inline: var(--menu-item-inline-padding) !important;
  padding-block: var(--menu-item-block-padding) !important;
}
 
:is(.brx-header-left, .brx-header-right)[data-builder-window] .dwc-nest-menu-top {
  min-block-size: 80px !important;
}
 
:is(.brx-header-left, .brx-header-right)[data-builder-window] .dwc-nest-nav-items {
  overflow-y: scroll;
}

:is(.brx-header-left, .brx-header-right)[data-builder-mode] .brx-dropdown-content {
  min-inline-size: var(--mobile-menu-width);
  position: static;
}

:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header .dwc-nest-menu.brxe-nav-nested .brx-nav-nested-items {
  flex-wrap: nowrap;
}
:is(.brx-header-left, .brx-header-right)[data-builder-window] #brx-header #dwc-nest-menu .brx-dropdown-content {   
  visibility: visible !important;
  opacity: 1;
}

/*OVERLAY SIDEBAR*/


html:not(.dwc-mobile):has([data-overlay-sidebar=true])  {
 --mobile-menu-bg: rgb(255 255 255 / 0%);
  --menu-item-border: solid 1px rgb(255 255 255 / 50%);
 
}

html:not(.dwc-mobile):has([data-overlay-sidebar=true]) :is(.brx-header-left, .brx-header-right):not([data-builder-modee]) :is(main, footer){
  margin: 0 !important
}

html:not(.dwc-mobile):has([data-overlay-sidebar=true]) :is(.brx-header-left, .brx-header-right):not([data-builder-modee]) :is(main, footer) :where(section):not(section>section) {
  padding-inline-start: calc(var(--mobile-menu-width) + clamp(1.5rem, calc(0.625vw + 1.375rem), 1.875rem));
  max-inline-size: 100%
}

html:not(.dwc-mobile):has([data-overlay-sidebar=true]) :is(.brx-header-left, .brx-header-right):not([data-builder-modee]) #brx-header {
  border-radius: var(--overlay-sidebar-radius);
  overflow: hidden;
  background: var(--overlay-sidebar-bg);
  box-shadow: var(--overlay-sidebar-shadow) !important;
  inset: var(--overlay-sidebar-inset);
}

html:not(.dwc-mobile):has([data-overlay-sidebar=true]) :is(.brx-header-left, .brx-header-right):not([data-builder-modee]) .dwc-nest-header{
  backdrop-filter: blur(13px);
  background: transparent !important;
}

html:not(.dwc-mobile):has([data-overlay-sidebar=true]):not([data-builder-modee])  .brx-dropdown-content {
   background-color: rgb(255 255 255 / 100%);
}

/*NO BRX-OPEN STYLES*/
html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) #brx-header .dwc-nest-menu.brxe-nav-nested .brx-nav-nested-items {
  display: flex;
  flex-wrap: nowrap;
  flex-direction: column !important;
}


  html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) .dwc-nest-menu.brxe-nav-nested .brxe-dropdown .brx-dropdown-content {
      visibility: visible;
      min-inline-size: var(--mobile-menu-width) !important;
  }


  html:not(.dwc-mobile) :is(.brx-header-left, .brx-header-right):not([data-builder-window]) .dwc-nest-menu[data-submenu-reveal="expand"] .brxe-dropdown.open>.brx-dropdown-content {
   position: static;
}
class SidebarNavigation {
  constructor(options = {}) {
    // Basic configuration properties
    this.config = {
      minWidth: options.minWidth || MegaMenuCONFIG.minWidth, // Using external minWidth variable
      menuSelector: options.menuSelector || '.dwc-nest-menu',
      openClass: options.openClass || 'brx-open',
      activeClasses: options.activeClasses || ['open', 'active'],
      leftHeaderClass: options.leftHeaderClass || 'brx-header-left',
      rightHeaderClass: options.rightHeaderClass || 'brx-header-right',
      debounceDelay: options.debounceDelay || 100,
      menuItemClickDelay: options.menuItemClickDelay || 300
    };
    
    // Set dependent selectors
    const menuSelector = this.config.menuSelector;
    this.config.submenuToggleSelector = options.submenuToggleSelector || `${menuSelector} .brx-submenu-toggle`;
    this.config.dropdownSelector = options.dropdownSelector || `${menuSelector} .brxe-dropdown`;
    this.config.dropdownContentSelector = options.dropdownContentSelector || `${menuSelector} .brx-dropdown-content`;
    
    // State
    this.previousHeaderClass = null;
    this.dropdownClickHandlers = new Map();
    this.menuHoverHandlers = null;
    this.menuItemClickTimeout = null;
    this.keyboardNavHandler = null;
    this.cachedFocusableElements = null;
    this.cachedElements = {
      menuElement: null,
      navElement: null,
      dropdowns: null,
      dropdownToggles: null,
      menuItems: null
    };
    
    // Bind methods to this instance
    this.handleResize = this.debounce(this.handleMenu.bind(this), this.config.debounceDelay);
    this.handleOutsideClick = this.handleOutsideClick.bind(this);
  }
  
  // Initialize everything - called once
  init() {
    // Wait for DOM to be fully loaded before attaching events
    if (document.readyState === 'loading') {
      document.addEventListener('DOMContentLoaded', () => {
        this.initAfterDOMLoaded();
      }, { once: true });
    } else {
      this.initAfterDOMLoaded();
    }
    
    return this;
  }
  
  // Separate initialization method to run after DOM is loaded
  initAfterDOMLoaded() {
    // Cache DOM elements once
    this.cacheElements();
    
    // Setup resize event with passive flag
    window.addEventListener('resize', this.handleResize, { passive: true });
    
    // Setup mutation observer for critical class changes only
    this.setupMutationObserver();
    
    // Initial setup based on current screen size
    this.handleMenu();
    
    // Cache focusable elements once if header class is present
    if (this.hasHeaderClass()) {
      this.cacheFocusableElements();
      this.setupMenuFocusNavigation();
    }
  }
  
  // Cache all required DOM elements upfront
  cacheElements() {
    this.cachedElements.menuElement = document.querySelector(this.config.menuSelector);
    
    if (this.cachedElements.menuElement) {
      this.cachedElements.navElement = this.cachedElements.menuElement.querySelector('.dwc-nest-nav-items');
      this.cachedElements.dropdowns = Array.from(document.querySelectorAll(this.config.dropdownSelector));
      this.cachedElements.dropdownToggles = Array.from(document.querySelectorAll(this.config.submenuToggleSelector));
      this.cachedElements.menuItems = Array.from(document.querySelectorAll(`${this.config.menuSelector} .menu-item`));
    }
  }
  
  // Set up a focused mutation observer only for dropdown state changes
  setupMutationObserver() {
    if (!this.cachedElements.dropdowns || this.cachedElements.dropdowns.length === 0) return;
    
    const callback = (mutations) => {
      for (let mutation of mutations) {
        if (mutation.type === 'attributes' && mutation.attributeName === 'class') {
          const target = mutation.target;
          const prevClassList = mutation.oldValue ? mutation.oldValue.split(' ') : [];
          const hadBothBefore = prevClassList.includes('open') && prevClassList.includes('active');
          const hasBothNow = target.classList.contains('open') && target.classList.contains('active');
    
          if (hadBothBefore !== hasBothNow) {
            this.updateDropdownAccessibility();
            break; // Only need to update once per batch
          }
        }
      }
    };
    
    // Create observer with optimized options
    this.classObserver = new MutationObserver(callback);
    
    // Observe only the dropdown elements
    this.cachedElements.dropdowns.forEach(dropdown => {
      this.classObserver.observe(dropdown, { 
        attributes: true, 
        attributeFilter: ['class'], 
        attributeOldValue: true 
      });
    });
  }
  
  // Cache focusable elements for keyboard navigation
  cacheFocusableElements() {
    if (!this.cachedElements.navElement) return;
    
    // Get direct children of nav
    const directChildren = Array.from(this.cachedElements.navElement.children);
    
    // Find the first focusable element within each direct child
    this.cachedFocusableElements = directChildren.map(child => {
      // Check if the child itself is focusable
      if (child.matches('a, button, input, select, textarea, [tabindex]:not([tabindex="-1"])')) {
        return child;
      }
      // Otherwise, find the first focusable element within this child
      return child.querySelector('a, button, input, select, textarea, [tabindex]:not([tabindex="-1"])');
    }).filter(Boolean); // Remove null/undefined values
  }
  
  // Clean up all event listeners and observers
  destroy() {
    // Clean up the mutation observer
    if (this.classObserver) {
      this.classObserver.disconnect();
      this.classObserver = null;
    }
    
    // Clean up resize listener
    window.removeEventListener('resize', this.handleResize);
    
    // Clean up click handlers
    if (this.dropdownClickHandlers.size > 0) {
      this.dropdownClickHandlers.forEach((handler, toggle) => {
        toggle.removeEventListener('click', handler);
      });
      this.dropdownClickHandlers.clear();
    }
    
    // Clean up hover handlers
    this.cleanupMenuHover();
    
    // Clean up menu item click handlers
    this.cleanupMenuItemClicks();
    
    // Clean up outside click handler
    document.removeEventListener('click', this.handleOutsideClick);
    
    // Clean up keyboard navigation
    if (this.keyboardNavHandler) {
      document.removeEventListener('keydown', this.keyboardNavHandler);
      this.keyboardNavHandler = null;
    }
    
    // Clear any pending timeouts
    if (this.menuItemClickTimeout) {
      clearTimeout(this.menuItemClickTimeout);
      this.menuItemClickTimeout = null;
    }
  }
  
  // Utility methods
  hasHeaderClass() {
    return document.body.classList.contains(this.config.leftHeaderClass) || 
           document.body.classList.contains(this.config.rightHeaderClass);
  }
  
  debounce(func, delay) {
    let timer;
    return (...args) => {
      clearTimeout(timer);
      timer = setTimeout(() => func(...args), delay);
    };
  }

  // Check if an element has all the required active classes
  hasAllActiveClasses(element) {
    return this.config.activeClasses.every(className => element.classList.contains(className));
  }
  
  // Toggle all active classes on an element
  toggleActiveClasses(element) {
    this.config.activeClasses.forEach(className => {
      element.classList.toggle(className);
    });
  }
  
  // Core functionality methods
  handleMenu() {
    if (!this.cachedElements.menuElement) return;
    if (!this.hasHeaderClass() && !this.previousHeaderClass) return;

    const screenWidth = window.innerWidth;
    const isLargeScreen = screenWidth >= this.config.minWidth;
    const menuElement = this.cachedElements.menuElement;

    if (!isLargeScreen) {
      // Save which class was present before removal
      if (this.hasHeaderClass()) {
        this.previousHeaderClass = document.body.classList.contains(this.config.leftHeaderClass) 
          ? this.config.leftHeaderClass 
          : this.config.rightHeaderClass;
        
        // Remove header classes
        document.body.classList.remove(this.config.leftHeaderClass, this.config.rightHeaderClass);
        menuElement.classList.remove(this.config.openClass);
        
        // Reset accessibility attributes
        this.resetAccessibilityAttributes();
      }
      
      // Clean up event handlers for mobile view
      this.cleanupMenuHover();
      this.cleanupMenuItemClicks();
      this.cleanupDropdownHandlers();
      document.removeEventListener('click', this.handleOutsideClick);
      
      return;
    }

    // Large screen behavior
    if (!this.hasHeaderClass() && this.previousHeaderClass) {
      document.body.classList.add(this.previousHeaderClass);
    }

    if (this.hasHeaderClass()) {
      if (!menuElement.classList.contains(this.config.openClass)) {
        menuElement.classList.add(this.config.openClass);
      }
      
      // Setup elements for large screen view
      this.setupMenuHover();
      this.setupMenuItemClicks();
      this.setupDropdownHandlers();
      this.setupMenuFocusNavigation();
      this.updateDropdownAccessibility();
      
      // Ensure outside click handler is set up
      document.removeEventListener('click', this.handleOutsideClick);
      document.addEventListener('click', this.handleOutsideClick, { passive: false });
    }
  }
  
  // Reset accessibility attributes when switching to mobile
  resetAccessibilityAttributes() {
    if (!this.cachedElements.dropdowns) return;
    
    // Remove all inert attributes from dropdown contents
    this.cachedElements.dropdowns.forEach(dropdown => {
      const content = dropdown.querySelector(this.config.dropdownContentSelector);
      if (content) {
        content.removeAttribute('inert');
      }
      
      const button = dropdown.querySelector('button');
      if (button) {
        button.setAttribute('aria-expanded', 'false');
      }
    });
  }
  
  setupMenuFocusNavigation() {
    // Only run if hasHeaderClass() is true and we have focusable elements
    if (!this.hasHeaderClass() || !this.cachedFocusableElements || this.cachedFocusableElements.length === 0) {
      return;
    }
    
    // Clean up previous handler if it exists
    if (this.keyboardNavHandler) {
      document.removeEventListener('keydown', this.keyboardNavHandler, true);
      this.keyboardNavHandler = null;
    }
    
    const navMenu = this.cachedElements.menuElement;
    const focusableElements = this.cachedFocusableElements;
    const firstFocusableElement = focusableElements[0];
    const lastFocusableElement = focusableElements[focusableElements.length - 1];
    
    // Find adjacent focusable elements outside the menu (only once during setup)
    const headerElement = navMenu.closest('header') || document.querySelector('header');
    
    // Prepare variables to hold adjacent elements
    let prevFocusableElement = null;
    let nextFocusableElement = null;
    let firstElementAfterHeader = null;
    
    if (headerElement) {
      // Get all focusable elements within the header - do this once and cache the result
      const headerFocusables = Array.from(
        headerElement.querySelectorAll('a:not([tabindex="-1"]), button:not([tabindex="-1"]), input:not([tabindex="-1"]), select:not([tabindex="-1"]), textarea:not([tabindex="-1"]), [tabindex]:not([tabindex="-1"])')
      ).filter(el => window.getComputedStyle(el).display !== 'none');
      
      // Find the index of our first and last menu elements in one pass
      const menuStartIndex = headerFocusables.indexOf(firstFocusableElement);
      const menuEndIndex = headerFocusables.indexOf(lastFocusableElement);
      
      // Cache the adjacent elements
      if (menuStartIndex > 0) {
        prevFocusableElement = headerFocusables[menuStartIndex - 1];
      }
      
      if (menuEndIndex !== -1 && menuEndIndex < headerFocusables.length - 1) {
        nextFocusableElement = headerFocusables[menuEndIndex + 1];
      }
      
      // Pre-calculate the first element after header - but only if needed
      if (!nextFocusableElement) {
        // Use a more efficient selector that targets immediate children of body that aren't the header
        const selector = 'body > *:not(header)';
        const nonHeaderElements = document.querySelectorAll(selector);
        
        // Only process if we have elements
        if (nonHeaderElements.length > 0) {
          // Create a function to find the first focusable element (used later if needed)
          this.findFirstFocusableAfterHeader = () => {
            for (const element of nonHeaderElements) {
              const focusable = element.querySelector('a:not([tabindex="-1"]), button:not([tabindex="-1"]), input:not([tabindex="-1"]), select:not([tabindex="-1"]), textarea:not([tabindex="-1"]), [tabindex]:not([tabindex="-1"])');
              if (focusable && window.getComputedStyle(focusable).display !== 'none') {
                return focusable;
              }
            }
            return null;
          };
        }
      }
    }
    
    // Create keyboard navigation handler with closure over the cached elements
    this.keyboardNavHandler = (e) => {
      // Quick check for Tab key first
      if (e.key !== 'Tab') return;
      
      // Then check if focus is inside the menu
      if (!navMenu.contains(document.activeElement)) return;
      
      let targetElement = null;
      
      // Handle tab navigation at boundaries only
      if (!e.shiftKey && document.activeElement === lastFocusableElement) {
        // Forward tab from last element
        e.preventDefault();
        e.stopPropagation();
        
        if (nextFocusableElement) {
          targetElement = nextFocusableElement;
        } else if (this.findFirstFocusableAfterHeader) {
          // Only search for elements after header if needed and not already found
          firstElementAfterHeader = this.findFirstFocusableAfterHeader();
          targetElement = firstElementAfterHeader;
        }
        
        // Focus on the target or body as fallback
        setTimeout(() => {
          if (targetElement) {
            targetElement.focus();
          } else {
            document.body.setAttribute('tabindex', '-1');
            document.body.focus();
            document.body.removeAttribute('tabindex');
          }
        }, 10);
      } 
      else if (e.shiftKey && document.activeElement === firstFocusableElement) {
        // Backward tab from first element
        e.preventDefault();
        e.stopPropagation();
        
        setTimeout(() => {
          if (prevFocusableElement) {
            prevFocusableElement.focus();
          } else {
            document.body.setAttribute('tabindex', '-1');
            document.body.focus();
            document.body.removeAttribute('tabindex');
          }
        }, 10);
      }
    };
    
    // Use capture phase for the event
    document.addEventListener('keydown', this.keyboardNavHandler, true);
  }
  
  setupMenuHover() {
    const menuElement = this.cachedElements.menuElement;
    if (!menuElement) return;
    
    // Clean up existing hover handlers first
    this.cleanupMenuHover();
    
    // Create event handlers
    const mouseenterHandler = () => {
      menuElement.classList.add(this.config.openClass);
    };
    
    const mouseleaveHandler = () => {
      menuElement.classList.remove(this.config.openClass);
    };
    
    // Add event listeners with passive flag for better performance
    menuElement.addEventListener('mouseenter', mouseenterHandler, { passive: true });
    menuElement.addEventListener('mouseleave', mouseleaveHandler, { passive: true });
    
    // Store the handlers for cleanup
    this.menuHoverHandlers = {
      element: menuElement,
      mouseenter: mouseenterHandler,
      mouseleave: mouseleaveHandler
    };
  }
  
  cleanupMenuHover() {
    if (this.menuHoverHandlers) {
      const { element, mouseenter, mouseleave } = this.menuHoverHandlers;
      element.removeEventListener('mouseenter', mouseenter);
      element.removeEventListener('mouseleave', mouseleave);
      this.menuHoverHandlers = null;
    }
  }
  
  setupMenuItemClicks() {
    if (!this.cachedElements.menuItems || this.cachedElements.menuItems.length === 0) return;
    
    // Clean up existing handlers first
    this.cleanupMenuItemClicks();
    
    const menuElement = this.cachedElements.menuElement;
    const menuItemHandlers = new Map();
    
    this.cachedElements.menuItems.forEach(item => {
      const clickHandler = () => {
        if (this.hasHeaderClass()) {
          // Clear any existing timeout
          if (this.menuItemClickTimeout) {
            clearTimeout(this.menuItemClickTimeout);
          }
          
          // Set timeout before adding the class
          this.menuItemClickTimeout = setTimeout(() => {
            if (!menuElement.classList.contains(this.config.openClass)) {
              menuElement.classList.add(this.config.openClass);
            }
          }, this.config.menuItemClickDelay);
        }
      };
      
      menuItemHandlers.set(item, clickHandler);
      item.addEventListener('click', clickHandler);
    });
    
    this.menuItemClickHandlers = menuItemHandlers;
  }
  
  cleanupMenuItemClicks() {
    if (this.menuItemClickHandlers && this.menuItemClickHandlers instanceof Map) {
      this.menuItemClickHandlers.forEach((handler, item) => {
        item.removeEventListener('click', handler);
      });
      this.menuItemClickHandlers.clear();
    }
    
    if (this.menuItemClickTimeout) {
      clearTimeout(this.menuItemClickTimeout);
      this.menuItemClickTimeout = null;
    }
  }
  
  setupDropdownHandlers() {
    if (!this.hasHeaderClass() || !this.cachedElements.dropdownToggles) return;
    
    // Clean up existing handlers first
    this.cleanupDropdownHandlers();
    
    this.cachedElements.dropdownToggles.forEach(toggle => {
      const clickHandler = (event) => {
        event.stopPropagation();
        event.preventDefault();
        
        const dropdown = toggle.closest(this.config.dropdownSelector);
        if (dropdown) {
          this.toggleActiveClasses(dropdown);
          this.updateDropdownAccessibility();
        }
      };
      
      this.dropdownClickHandlers.set(toggle, clickHandler);
      toggle.addEventListener('click', clickHandler);
    });
  }
  
  cleanupDropdownHandlers() {
    if (this.dropdownClickHandlers.size > 0) {
      this.dropdownClickHandlers.forEach((handler, toggle) => {
        toggle.removeEventListener('click', handler);
      });
      this.dropdownClickHandlers.clear();
    }
  }
  
  handleOutsideClick(event) {
    if (event.target.tagName === 'A') return;
    if (!event.target.closest(this.config.dropdownSelector)) return;
    if (!event.target.closest(this.config.submenuToggleSelector)) {
      event.preventDefault();
      event.stopPropagation();
    }
  }
  
  updateDropdownAccessibility() {
    // Only run if hasHeaderClass() is true
    if (!this.hasHeaderClass() || !this.cachedElements.dropdowns) return;
    
    this.cachedElements.dropdowns.forEach(dropdown => {
      const content = dropdown.querySelector(this.config.dropdownContentSelector);
      const button = dropdown.querySelector('button');
      
      // Check if dropdown has all active classes
      const isOpen = this.hasAllActiveClasses(dropdown);
      
      if (content) {
        if (isOpen) {
          content.removeAttribute('inert');
        } else {
          content.setAttribute('inert', '');
        }
      }
      
      if (button) {
        button.setAttribute('aria-expanded', isOpen ? 'true' : 'false');
      }
    });
  }
}


const sidebarNav = new SidebarNavigation().init();

4mil PVC Air Free Grey Back Vinyl

$209.00

4mil PVC Air Free Grey Back Matte and Glossy Vinyl

mil PVC Free Grey Back Vinyl

4mil PVC Free Grey Back Vinyl delivers consistent print quality with added opacity for professional graphic applications. If you’re searching for durable signage materials, 4mil PVC Air Free Grey Back Vinyl is an excellent choice. Designed with a grey back layer, this vinyl helps block show-through from underlying surfaces, allowing colors and graphics to appear more accurate and vibrant. Moreover, its PVC-free construction supports environmentally conscious printing without sacrificing performance.

Because this material uses a removable clear adhesive with non-residue properties, installers can apply and remove graphics cleanly. As a result, this vinyl works well for temporary signage, promotional displays, and short-term branding applications.

Printer Compatibility

This PVC-free grey back vinyl integrates easily into modern print workflows. In addition, it supports multiple ink technologies for flexible production.

Compatible ink systems include:

  • Eco-Solvent

  • UV

  • Latex

  • UV Gel

Therefore, print shops can use this material across a wide range of printer platforms.

Material Features and Benefits

This specialty vinyl focuses on opacity, ease of removal, and reliable print performance. Furthermore, its grey back layer enhances visual consistency across various installation surfaces.

Key features include:

  • 4 mil thickness for balanced durability and flexibility

  • PVC-free construction for eco-conscious applications

  • Grey back layer to reduce surface show-through

  • Removable clear adhesive with non-residue removal

  • Smooth surface for sharp image reproduction

Consequently, this vinyl works well for window graphics, wall displays, decals, and promotional signage.

Built for Professional Graphic Applications

This PVC-free vinyl performs consistently in commercial printing environments. In addition, its removable adhesive allows for easy updates while maintaining clean surfaces.

By choosing 4mil PVC Free Grey Back Vinyl, print professionals gain a versatile material that combines opacity, easy removal, and professional-grade print quality.

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