Image Gallery

.gallery-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

.gallery-header {
  text-align: center;
  margin-bottom: 48px;
}

.gallery-title {
  font-size: 48px;
  font-weight: 700;
  color: #1a202c;
  margin: 0 0 16px 0;
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gallery-subtitle {
  font-size: 18px;
  color: #6b7280;
  margin: 0;
  font-weight: 400;
}

/* Filter Controls */
.filter-controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 12px 24px;
  border: 2px solid #e2e8f0;
  background: white;
  color: #4a5568;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.filter-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.filter-btn:hover::before {
  left: 100%;
}

.filter-btn:hover {
  border-color: #667eea;
  color: #667eea;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.filter-btn.active {
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-color: #667eea;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.gallery-item {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  background: white;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  cursor: pointer;
}

.gallery-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.gallery-item img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.7) 100%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-info {
  align-self: flex-end;
  text-align: left;
}

.gallery-item-title {
  color: white;
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 4px 0;
}

.gallery-item-category {
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.gallery-zoom-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.9);
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.gallery-zoom-btn:hover {
  background: white;
  transform: scale(1.1);
}

.gallery-zoom-btn svg {
  width: 20px;
  height: 20px;
  color: #4a5568;
}

/* Lightbox */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-close {
  position: absolute;
  top: -60px;
  right: 0;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.lightbox-close svg {
  width: 20px;
  height: 20px;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-50%) scale(1.1);
}

.lightbox-prev {
  left: -80px;
}

.lightbox-next {
  right: -80px;
}

.lightbox-nav svg {
  width: 24px;
  height: 24px;
}

.lightbox-image-container {
  position: relative;
  max-width: 100%;
  max-height: 70vh;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.lightbox-image {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  display: block;
}

.lightbox-info {
  text-align: center;
  margin-top: 24px;
  color: white;
}

.lightbox-title {
  font-size: 24px;
  font-weight: 600;
  margin: 0 0 8px 0;
}

.lightbox-category {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin: 0 0 16px 0;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.lightbox-counter {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

/* Filter Animation */
.gallery-item {
  animation: fadeInUp 0.6s ease;
}

.gallery-item.hidden {
  display: none;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .gallery-container {
    padding: 16px;
  }
  
  .gallery-title {
    font-size: 32px;
  }
  
  .gallery-subtitle {
    font-size: 16px;
  }
  
  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 16px;
  }
  
  .gallery-item img {
    height: 200px;
  }
  
  .filter-controls {
    gap: 8px;
  }
  
  .filter-btn {
    padding: 10px 20px;
    font-size: 13px;
  }
  
  .lightbox-nav {
    display: none;
  }
  
  .lightbox-close {
    top: -50px;
    right: 10px;
  }
  
  .lightbox-content {
    max-width: 95vw;
    max-height: 95vh;
  }
  
  .lightbox-image-container {
    max-height: 60vh;
  }
  
  .lightbox-image {
    max-height: 60vh;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  
  .filter-controls {
    flex-direction: column;
    align-items: center;
  }
  
  .filter-btn {
    width: 200px;
    text-align: center;
  }
}

document.addEventListener('DOMContentLoaded', () => {
  const filterButtons = document.querySelectorAll('.filter-btn');
  const galleryItems = document.querySelectorAll('.gallery-item');
  const lightbox = document.getElementById('lightbox');
  const lightboxImage = document.getElementById('lightboxImage');
  const lightboxTitle = document.getElementById('lightboxTitle');
  const lightboxCategory = document.getElementById('lightboxCategory');
  const lightboxCounter = document.getElementById('lightboxCounter');
  const lightboxClose = document.getElementById('lightboxClose');
  const lightboxPrev = document.getElementById('lightboxPrev');
  const lightboxNext = document.getElementById('lightboxNext');
  
  let currentImageIndex = 0;
  let currentImages = [];
  
  // Collect all image data
  const allImages = Array.from(galleryItems).map((item, index) => {
    const img = item.querySelector('img');
    const title = item.querySelector('.gallery-item-title').textContent;
    const category = item.querySelector('.gallery-item-category').textContent;
    return {
      src: img.src,
      alt: img.alt,
      title: title,
      category: category,
      element: item,
      originalIndex: index
    };
  });
  
  // Filter functionality
  filterButtons.forEach(button => {
    button.addEventListener('click', () => {
      const filter = button.dataset.filter;
      
      // Update active button
      filterButtons.forEach(btn => btn.classList.remove('active'));
      button.classList.add('active');
      
      // Filter items with animation
      galleryItems.forEach((item, index) => {
        const category = item.dataset.category;
        const shouldShow = filter === 'all' || category === filter;
        
        if (shouldShow) {
          item.classList.remove('hidden');
          item.style.animation = 'none';
          setTimeout(() => {
            item.style.animation = `fadeInUp 0.6s ease ${index * 0.1}s`;
          }, 10);
        } else {
          item.classList.add('hidden');
        }
      });
      
      // Update current images array for lightbox
      updateCurrentImages();
    });
  });
  
  // Update current images based on filter
  function updateCurrentImages() {
    const activeFilter = document.querySelector('.filter-btn.active').dataset.filter;
    currentImages = allImages.filter(img => {
      return activeFilter === 'all' || img.element.dataset.category === activeFilter;
    });
  }
  
  // Initialize current images
  updateCurrentImages();
  
  // Lightbox functionality
  function openLightbox(index) {
    const imageData = currentImages[index];
    if (!imageData) return;
    
    currentImageIndex = index;
    lightboxImage.src = imageData.src;
    lightboxImage.alt = imageData.alt;
    lightboxTitle.textContent = imageData.title;
    lightboxCategory.textContent = imageData.category;
    lightboxCounter.textContent = `${index + 1} / ${currentImages.length}`;
    
    lightbox.classList.add('active');
    document.body.style.overflow = 'hidden';
  }
  
  function closeLightbox() {
    lightbox.classList.remove('active');
    document.body.style.overflow = '';
  }
  
  function showPrevImage() {
    currentImageIndex = (currentImageIndex - 1 + currentImages.length) % currentImages.length;
    openLightbox(currentImageIndex);
  }
  
  function showNextImage() {
    currentImageIndex = (currentImageIndex + 1) % currentImages.length;
    openLightbox(currentImageIndex);
  }
  
  // Event listeners for zoom buttons
  galleryItems.forEach((item, originalIndex) => {
    const zoomBtn = item.querySelector('.gallery-zoom-btn');
    zoomBtn.addEventListener('click', (e) => {
      e.stopPropagation();
      
      // Find the index in current filtered images
      const imageData = allImages[originalIndex];
      const filteredIndex = currentImages.findIndex(img => img.originalIndex === originalIndex);
      
      if (filteredIndex !== -1) {
        openLightbox(filteredIndex);
      }
    });
    
    // Also allow clicking on the item itself
    item.addEventListener('click', () => {
      const imageData = allImages[originalIndex];
      const filteredIndex = currentImages.findIndex(img => img.originalIndex === originalIndex);
      
      if (filteredIndex !== -1) {
        openLightbox(filteredIndex);
      }
    });
  });
  
  // Lightbox controls
  lightboxClose.addEventListener('click', closeLightbox);
  lightboxPrev.addEventListener('click', showPrevImage);
  lightboxNext.addEventListener('click', showNextImage);
  
  // Close lightbox when clicking outside image
  lightbox.addEventListener('click', (e) => {
    if (e.target === lightbox) {
      closeLightbox();
    }
  });
  
  // Keyboard navigation
  document.addEventListener('keydown', (e) => {
    if (!lightbox.classList.contains('active')) return;
    
    switch (e.key) {
      case 'Escape':
        closeLightbox();
        break;
      case 'ArrowLeft':
        showPrevImage();
        break;
      case 'ArrowRight':
        showNextImage();
        break;
    }
  });
  
  // Lazy loading for images
  const imageObserver = new IntersectionObserver((entries, observer) => {
    entries.forEach(entry => {
      if (entry.isIntersecting) {
        const img = entry.target;
        img.src = img.dataset.src || img.src;
        img.classList.remove('lazy');
        observer.unobserve(img);
      }
    });
  });
  
  // Observe all images for lazy loading
  const images = document.querySelectorAll('.gallery-item img');
  images.forEach(img => {
    imageObserver.observe(img);
  });
  
  // Touch/swipe support for mobile
  let touchStartX = 0;
  let touchEndX = 0;
  
  lightbox.addEventListener('touchstart', (e) => {
    touchStartX = e.changedTouches[0].screenX;
  });
  
  lightbox.addEventListener('touchend', (e) => {
    touchEndX = e.changedTouches[0].screenX;
    handleSwipe();
  });
  
  function handleSwipe() {
    const swipeThreshold = 50;
    const diff = touchStartX - touchEndX;
    
    if (Math.abs(diff) > swipeThreshold) {
      if (diff > 0) {
        // Swipe left - next image
        showNextImage();
      } else {
        // Swipe right - previous image
        showPrevImage();
      }
    }
  }
  
  // Preload adjacent images for better performance
  function preloadAdjacentImages() {
    const prevIndex = (currentImageIndex - 1 + currentImages.length) % currentImages.length;
    const nextIndex = (currentImageIndex + 1) % currentImages.length;
    
    [prevIndex, nextIndex].forEach(index => {
      const img = new Image();
      img.src = currentImages[index].src;
    });
  }
  
  // Call preload when opening lightbox
  const originalOpenLightbox = openLightbox;
  openLightbox = function(index) {
    originalOpenLightbox(index);
    setTimeout(preloadAdjacentImages, 100);
  };
  
  // Add loading animation for images
  images.forEach(img => {
    img.addEventListener('load', () => {
      img.style.opacity = '1';
    });
    
    img.style.opacity = '0';
    img.style.transition = 'opacity 0.3s ease';
  });
});