/* update variables when header is on dark background*/
.on-dark-bg {
   --header-bg: var(--current-header-bg);
   --chevron-clr: white;
   --menu-item-clr: white;
   --menu-item-hover-bg: #172235;
   --menu-item-hover-clr: #bc92e6;
   --menu-toggle-clr: var(--menu-item-clr);
   --dropdown-content-border: solid 1px rgb(220 220 220 / 20%);
   --mobile-menu-bg: var(--header-bg);
 }

 .on-light-bg {
   --menu-item-clr: black;
   /* update variables when header is on light background*/
 }


 /* update variable when on dark or light background */
 .on-dark-bg,
 .on-light-bg {
   --overlay-header-bg-active: var(--current-header-bg);
   --dropdown-content-bg: var(--current-header-bg);
 }

 .on-video-section {
   /* update variables when header is on video section*/
   --menu-item-clr: white;
   --chevron-clr: white;
   --menu-item-hover-bg: rgb(0 0 0 / 30%);
   --menu-item-hover-clr: #bc92e6;
   --dropdown-content-bg: rgb(0 0 0 / 70%);
   --overlay-header-bg: rgb(0 0 0 / 25%);
   --overlay-header-bg-active: var(--dropdown-content-bg);
   --dropdown-content-border: solid 1px rgb(220 220 220 / 20%);
   --current-header-bg: rgb(0 0 0 / 14%) !important;
   --header-bg: rgb(0 0 0 / 70%);
   --menu-toggle-clr: white;
   --mobile-menu-bg: rgb(0 0 0 / 95%);
   --menu-cta-border: var(--dropdown-content-border)
 }


 .on-hero-section {
   /* update variables when header is on hero section*/
 }

 /* header bg blure when on video section */
 html:not(.dwc-mobile) .dwc-nest-header.on-video-section {
   backdrop-filter: blur(var(--overlay-header-blur));
 }

 /* overlay header border when on video section or dark background*/
 .dwc-nest-header:is(.on-dark-bg, .on-video-section)[data-overlay-header="true"] {
   border: 1px solid rgba(255, 255, 255, 0.2);
 }

 /* header bottom border when on dark background or video section*/
 .dwc-nest-header:is(.on-dark-bg, .on-video-section) {
   border-bottom: 1px solid rgba(255, 255, 255, 0.2);
 }


 /* logo color when on dark background*/
 .on-dark-bg .dwc-nest-menu__logo path {
   fill: white;
 }

 /* logo color when on light background*/
 .on-dark-bg .dwc-nest-menu__logo path {
   /*define svg fill when logo is on light background */
 }

 /* logo color when on video background*/
 .on-video-section .dwc-nest-menu__logo path {
   fill: white;
 }

/*custom */

.on-dark-bg .mega-menu-magic__menu-icon-large{
   background-color: var(--current-header-bg);
    fill: #bc92e6;
    color: #bc92e6;
}

.on-video-section .mega-menu-magic__menu-icon-large{
   background-color: var(--current-header-bg);
    fill: #bc92e6;
    color: #bc92e6;
}

.on-video-section .mega-menu-magic__dropdown-title,
.on-dark-bg .mega-menu-magic__dropdown-title{
    color: rgb(210 210 210);   
}
// Constants
const BREAKPOINT_DESKTOP = 0;
const DEBOUNCE_DELAY = 50;

// Configuration object for all header-related selectors
const HEADER_CONFIG = {
  // Main header element
  headerElement: '.dwc-nest-header',
  // Wrapper element selectors (can be classes, IDs, or data attributes)
  wrapperSelectors: [
    // '.dwc-nest-header__container'
  ],
  // Elements to monitor for header styling (can include any CSS selector)
  // Default monitors sections, but you can add footer, divs, or any element
  monitoredElements: 'section, [data-header-zone]',
  // Store original header background color
  originalHeaderBgColor: null
};

// Unified section type configuration
// Add new data attributes here - they will be automatically mapped to header classes
const SECTION_TYPES = {
  'data-hero': 'on-hero-section',
  'data-video': 'on-video-section',
  'data-custom': 'on-custom-section',
  'data-sticky': 'on-media-section'
  // Add new: 'data-feature': 'on-feature-section'
};

// Configuration for excluded sections
const EXCLUSION_CONFIG = {
  // Data attribute that identifies sections to exclude from header styling
  sectionAttribute: 'data-exclude-header'
};

// Text color classes
const TEXT_CLASSES = {
  light: 'on-dark-bg',
  dark: 'on-light-bg'
};

// Generate classes to remove dynamically from SECTION_TYPES and text classes
const ALL_CLASSES_TO_REMOVE = [
  // Add all header classes from section types
  ...Object.values(SECTION_TYPES),
  // Add text color classes
  TEXT_CLASSES.light,
  TEXT_CLASSES.dark
];

// Performance optimization: Cache DOM elements and computed values
const CACHE = {
  headerElement: null,
  wrapperElement: null,
  sections: [],
  sectionsData: new Map(),
  colorCache: new Map(),
  tempColorElement: null,
  lastKnownSection: null,
  isUpdating: false,
  pendingColorUpdate: false
};

// Initialize cache
function initializeCache() {
  // Cache header elements
  CACHE.headerElement = document.querySelector(HEADER_CONFIG.headerElement);
  
  // Try each wrapper selector until one is found
  for (const selector of HEADER_CONFIG.wrapperSelectors) {
    CACHE.wrapperElement = document.querySelector(selector);
    if (CACHE.wrapperElement) break;
  }
  
  // Cache sections and their positions
  CACHE.sections = Array.from(document.querySelectorAll(HEADER_CONFIG.monitoredElements));
  
  // Create reusable element for color calculations
  CACHE.tempColorElement = document.createElement('div');
  CACHE.tempColorElement.style.position = 'absolute';
  CACHE.tempColorElement.style.visibility = 'hidden';
  CACHE.tempColorElement.style.pointerEvents = 'none';
  document.body.appendChild(CACHE.tempColorElement);
  
  // Cache section metadata
  updateSectionsCache();
}

// Update sections cache (call when DOM changes)
function updateSectionsCache() {
  CACHE.sections = Array.from(document.querySelectorAll(HEADER_CONFIG.monitoredElements));
  CACHE.sectionsData.clear();
  
  CACHE.sections.forEach((section, index) => {
    const sectionData = {
      index,
      isExcluded: section.hasAttribute(EXCLUSION_CONFIG.sectionAttribute)
    };
    
    // Dynamically check for all section types defined in SECTION_TYPES
    Object.keys(SECTION_TYPES).forEach(attribute => {
      sectionData[attribute] = section.hasAttribute(attribute);
    });
    
    CACHE.sectionsData.set(section, sectionData);
  });
}

// Function to remove all section classes from :root only
function removeAllSectionClasses() {
  const rootElement = document.documentElement;
  
  // Remove classes from :root only
  rootElement.classList.remove(...ALL_CLASSES_TO_REMOVE);
}

// Function to update the CSS variable on :root
function updateRootBackgroundVariable(color) {
  document.documentElement.style.setProperty('--current-header-bg', color);
}

// Function to apply classes to :root only
function applyClassesToRoot(headerClass, textClass) {
  const rootElement = document.documentElement;
  
  // Apply header class to :root only
  if (headerClass) {
    rootElement.classList.add(headerClass);
  }
  
  // Apply text class to :root only
  if (textClass) {
    rootElement.classList.add(textClass);
  }
}

// Optimized color conversion using cached temp element
function getRGBValues(color) {
  const cacheKey = color;
  if (CACHE.colorCache.has(cacheKey)) {
    return CACHE.colorCache.get(cacheKey);
  }
  
  CACHE.tempColorElement.style.color = color;
  const computedColor = window.getComputedStyle(CACHE.tempColorElement).color;
  
  // Extract RGB values
  const match = computedColor.match(/rgba?\((\d+),\s*(\d+),\s*(\d+)/);
  const result = match ? {
    r: parseInt(match[1]),
    g: parseInt(match[2]),
    b: parseInt(match[3])
  } : { r: 255, g: 255, b: 255 };
  
  // Cache the result
  CACHE.colorCache.set(cacheKey, result);
  return result;
}

// Function to check if a background color is transparent or empty
function isBackgroundTransparent(color) {
  if (!color) return true;
  
  const transparentValues = [
    'transparent',
    'rgba(0, 0, 0, 0)',
    'rgba(0,0,0,0)',
    'initial',
    'inherit',
    ''
  ];
  
  return transparentValues.includes(color.toLowerCase().replace(/\s/g, ''));
}

// Function to determine if a color is dark or light
function isColorDark(color) {
  if (color === 'transparent' || color === 'rgba(0, 0, 0, 0)') {
    return false;
  }
  
  const rgb = getRGBValues(color);
  const luminance = (0.299 * rgb.r + 0.587 * rgb.g + 0.114 * rgb.b) / 255;
  return luminance < 0.5;
}

// Optimized section detection using cached data
function getCurrentSection() {
  if (!CACHE.headerElement || CACHE.sections.length === 0) return null;
  
  const headerHeight = CACHE.headerElement.offsetHeight;
  
  // Quick check if we're still in the same section
  if (CACHE.lastKnownSection) {
    const rect = CACHE.lastKnownSection.getBoundingClientRect();
    if (rect.top <= headerHeight && rect.bottom > headerHeight) {
      return CACHE.lastKnownSection;
    }
  }
  
  // Binary search would be ideal here, but simple loop is sufficient for most cases
  for (const section of CACHE.sections) {
    const rect = section.getBoundingClientRect();
    if (rect.top <= headerHeight && rect.bottom > headerHeight) {
      CACHE.lastKnownSection = section;
      return section;
    }
  }
  
  const firstSection = CACHE.sections[0] || null;
  CACHE.lastKnownSection = firstSection;
  return firstSection;
}

// Function to get computed background color with caching
function getComputedBackgroundColor(element) {
  const cacheKey = element;
  if (CACHE.colorCache.has(cacheKey)) {
    return CACHE.colorCache.get(cacheKey);
  }
  
  const bgColor = window.getComputedStyle(element).backgroundColor;
  CACHE.colorCache.set(cacheKey, bgColor);
  return bgColor;
}

// Function to initialize original header background color
function initializeOriginalHeaderBgColor() {
  if (CACHE.headerElement) {
    HEADER_CONFIG.originalHeaderBgColor = window.getComputedStyle(CACHE.headerElement).backgroundColor;
  }
}

// Function to determine header style configuration based on section
function determineHeaderConfig(section) {
  if (!section) return null;
  
  const sectionData = CACHE.sectionsData.get(section);
  if (!sectionData) return null;
  
  // If section is excluded, return null to skip styling
  if (sectionData.isExcluded) {
    return null;
  }
  
  // Dynamically check for any section type defined in SECTION_TYPES
  for (const [attribute, headerClass] of Object.entries(SECTION_TYPES)) {
    if (sectionData[attribute]) {
      return {
        backgroundColor: null,
        headerClass: headerClass,
        needsWhiteText: null,
        isSpecialSection: true
      };
    }
  }
  
  // Get the actual background color of the section
  const sectionBgColor = getComputedBackgroundColor(section);
  
  if (isBackgroundTransparent(sectionBgColor)) {
    return {
      backgroundColor: HEADER_CONFIG.originalHeaderBgColor || 'rgb(255, 255, 255)',
      headerClass: null,
      needsWhiteText: isColorDark(HEADER_CONFIG.originalHeaderBgColor || 'rgb(255, 255, 255)'),
      isSpecialSection: false
    };
  }
  
  const needsWhiteText = isColorDark(sectionBgColor);
  
  return {
    backgroundColor: sectionBgColor,
    headerClass: null,
    needsWhiteText: needsWhiteText,
    isSpecialSection: false
  };
}

// Function to apply styles (background color to header, classes to :root only)
function applyHeaderStyles(config) {
  if (!CACHE.headerElement || !config) return;
  
  const elementsToStyle = [CACHE.headerElement, CACHE.wrapperElement].filter(Boolean);
  
  // Use requestAnimationFrame for smooth visual updates
  requestAnimationFrame(() => {
    // First, remove all section classes and text classes from :root only
    removeAllSectionClasses();
    
    // Update the root CSS variable with background color
    if (config.backgroundColor !== null) {
      const appliedBgColor = config.backgroundColor || '';
      updateRootBackgroundVariable(appliedBgColor);
    } else {
      updateRootBackgroundVariable('');
    }
    
    // Determine text class to apply
    const textClass = config.needsWhiteText !== null 
      ? (config.needsWhiteText ? TEXT_CLASSES.light : TEXT_CLASSES.dark)
      : null;
    
    // Apply classes to :root only
    applyClassesToRoot(config.headerClass, textClass);
    
    // Handle background color on header elements only
    elementsToStyle.forEach(element => {
      if (config.backgroundColor !== null) {
        const appliedBgColor = config.backgroundColor || '';
        element.style.backgroundColor = appliedBgColor;
      } else {
        element.style.backgroundColor = '';
      }
    });
    
    // For special sections, allow CSS to apply first, then get computed background color
    if (config.isSpecialSection && config.headerClass) {
      // Use setTimeout(0) to ensure CSS has been applied, but batch multiple calls
      if (!CACHE.pendingColorUpdate) {
        CACHE.pendingColorUpdate = true;
        setTimeout(() => {
          // Process all elements that need color updates in this batch
          elementsToStyle.forEach(el => {
            // Check if element has any of the section classes (though they're not applied anymore)
            const hasSectionClass = Object.values(SECTION_TYPES).some(className => 
              el.classList.contains(className)
            );
            
            if (hasSectionClass) {
              const computedBgColor = getComputedBackgroundColor(el);
              updateRootBackgroundVariable(computedBgColor);
            }
          });
          CACHE.pendingColorUpdate = false;
        }, 50);
      }
    }
    
    CACHE.isUpdating = false;
  });
}

// Throttled update function using requestAnimationFrame
function updateHeaderStyles() {
  // Prevent multiple updates in the same frame
  if (CACHE.isUpdating) return;
  
  // Apply only on screens larger than the breakpoint
  if (window.innerWidth <= BREAKPOINT_DESKTOP) {
    return;
  }
  
  CACHE.isUpdating = true;
  
  const currentSection = getCurrentSection();
  if (!currentSection) {
    CACHE.isUpdating = false;
    return;
  }
  
  const headerConfig = determineHeaderConfig(currentSection);
  if (!headerConfig) {
    CACHE.isUpdating = false;
    return;
  }
  
  applyHeaderStyles(headerConfig);
}

// Debounce function for resize events (less frequent)
function debounce(func, wait) {
  let timeout;
  return function executedFunction(...args) {
    const later = () => {
      clearTimeout(timeout);
      func(...args);
    };
    clearTimeout(timeout);
    timeout = setTimeout(later, wait);
  };
}

// RAF-based throttle for scroll events
let rafId = null;
function throttleWithRAF(func) {
  return function(...args) {
    if (rafId) return;
    
    rafId = requestAnimationFrame(() => {
      func.apply(this, args);
      rafId = null;
    });
  };
}

// Initialize everything
function initialize() {
  initializeCache();
  initializeOriginalHeaderBgColor();
  updateHeaderStyles();
}

// Cleanup function
function cleanup() {
  if (CACHE.tempColorElement && CACHE.tempColorElement.parentNode) {
    CACHE.tempColorElement.parentNode.removeChild(CACHE.tempColorElement);
  }
  if (rafId) {
    cancelAnimationFrame(rafId);
  }
}

// Initialize on page load
if (document.readyState === 'loading') {
  document.addEventListener('DOMContentLoaded', initialize);
} else {
  initialize();
}

// Create optimized event handlers
const throttledUpdateHeaderStyles = throttleWithRAF(updateHeaderStyles);
const debouncedUpdateHeaderStyles = debounce(() => {
  updateSectionsCache(); // Refresh cache on resize
  updateHeaderStyles();
}, DEBOUNCE_DELAY);

// Add event listeners with passive option for better performance
window.addEventListener('scroll', throttledUpdateHeaderStyles, { passive: true });
window.addEventListener('resize', debouncedUpdateHeaderStyles, { passive: true });

// Cleanup on page unload
window.addEventListener('beforeunload', cleanup);

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