/**
 * Image Optimization and Lazy Loading CSS
 * Provides smooth loading animations and responsive image styling
 */

/* Base lazy image styles */
.lazy-image {
  transition: opacity 0.3s ease-in-out, filter 0.3s ease-in-out;
  background-color: #f8f9fa;
  background-image: linear-gradient(45deg, #f8f9fa 25%, transparent 25%), 
                    linear-gradient(-45deg, #f8f9fa 25%, transparent 25%), 
                    linear-gradient(45deg, transparent 75%, #f8f9fa 75%), 
                    linear-gradient(-45deg, transparent 75%, #f8f9fa 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  min-height: 100px;
}

/* Loading state */
.lazy-image.loading {
  opacity: 0.7;
  filter: blur(2px);
  animation: imageLoading 1.5s infinite ease-in-out;
}

/* Loaded state */
.lazy-image.loaded {
  opacity: 1;
  filter: none;
  background: none;
  animation: imageLoaded 0.5s ease-in-out;
}

/* Error state */
.lazy-image.error {
  opacity: 0.5;
  filter: grayscale(100%);
  position: relative;
}

.lazy-image.error::after {
  content: '⚠️ فشل في تحميل الصورة';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 12px;
  white-space: nowrap;
}

/* Loading animation */
@keyframes imageLoading {
  0% {
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  }
  100% {
    background-position: 20px 20px, 20px 30px, 30px 10px, 10px 20px;
  }
}

/* Loaded animation */
@keyframes imageLoaded {
  0% {
    opacity: 0;
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Responsive image improvements */
.responsive-image {
  width: 100%;
  height: auto;
  display: block;
}

/* Product image specific styles */
.product-image {
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-image:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* Logo image styles */
.logo-image {
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

/* Cover image styles */
.cover-image {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: 12px;
}

@media (max-width: 768px) {
  .cover-image {
    height: 200px;
  }
}

/* Image placeholder improvements */
.image-placeholder {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #6c757d;
  font-size: 14px;
  border-radius: 8px;
  min-height: 150px;
}

/* Progressive image enhancement */
.progressive-image {
  position: relative;
  overflow: hidden;
}

.progressive-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.5) 50%, transparent 70%);
  animation: shimmer 2s infinite;
  z-index: 1;
}

.progressive-image.loaded::before {
  display: none;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* WebP support detection */
.webp .lazy-image[data-webp] {
  background-image: attr(data-webp url);
}

/* Intersection Observer fallback */
.no-intersection-observer .lazy-image {
  opacity: 1;
  filter: none;
}

/* Print styles */
@media print {
  .lazy-image {
    opacity: 1 !important;
    filter: none !important;
    background: none !important;
  }
  
  .lazy-image.loading,
  .lazy-image.error {
    display: none;
  }
}

/* Accessibility improvements */
.lazy-image[aria-hidden="true"] {
  opacity: 0;
  pointer-events: none;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .lazy-image {
    transition: none;
    animation: none;
  }
  
  .lazy-image.loading {
    animation: none;
    opacity: 0.8;
  }
  
  .lazy-image.loaded {
    animation: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .lazy-image.error::after {
    background: black;
    color: white;
    border: 2px solid white;
  }
}

/* Focus styles for keyboard navigation */
.lazy-image:focus {
  outline: 2px solid #007bff;
  outline-offset: 2px;
}

/* Image optimization hints */
.lazy-image {
  /* Hint to browser about image decode */
  image-rendering: auto;
  
  /* Optimize for speed */
  image-rendering: -webkit-optimize-contrast;
  image-rendering: optimize-contrast;
}

/* Critical images (above fold) */
.critical-image {
  /* Don't lazy load critical images */
  opacity: 1;
  filter: none;
}

/* Blurred placeholder for smooth loading */
.blur-placeholder {
  filter: blur(10px);
  transform: scale(1.1);
  transition: filter 0.3s ease, transform 0.3s ease;
}

.blur-placeholder.loaded {
  filter: none;
  transform: scale(1);
}

/* Modern image formats support */
.avif .lazy-image[data-avif] {
  background-image: attr(data-avif url);
}

.webp .lazy-image[data-webp] {
  background-image: attr(data-webp url);
}