/* ===============================================
   GLUCO Website - Image Optimization CSS
   Enhanced responsive images and lazy loading
   =============================================== */

/* Responsive Image Base Styles */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

.img_responsive {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* Prevent Layout Shift - Reserve space for images */
img[width][height] {
    height: auto;
}

/* Image Container for Better Control */
.image-container {
    position: relative;
    overflow: hidden;
    background-color: #f0f0f0;
}

/* Loading Skeleton for Images */
img[loading="lazy"] {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Fade-in effect when image loads */
img {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

img.loaded,
img[loading="eager"] {
    opacity: 1;
}

/* Product Grid Images - Catalog Page */
.product-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.product-card:hover img {
    transform: scale(1.05);
}

/* Service Icons - Maintain Aspect Ratio */
.service-icon img {
    width: 100%;
    max-width: 300px;
    height: auto;
    object-fit: contain;
    margin: 0 auto;
}

/* Hero/Banner Images */
.hero-image img,
.banner-image img {
    width: 100%;
    height: auto;
    min-height: 400px;
    object-fit: cover;
}

/* Logo Optimization */
.logo img {
    width: 60px;
    height: 60px;
    object-fit: contain;
    will-change: transform;
}

/* Cart Item Images */
.cart-item img {
    width: 70px;
    height: 70px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

/* Figure Elements */
figure {
    margin: 0;
    padding: 0;
    position: relative;
    overflow: hidden;
}

figure img {
    display: block;
    width: 100%;
    height: auto;
}

/* ===============================================
   Mobile Optimization (< 768px)
   =============================================== */
@media screen and (max-width: 767px) {
    /* Reduce hero image height on mobile */
    .hero-image img,
    .banner-image img {
        min-height: 250px;
        max-height: 400px;
    }
    
    /* Stack images vertically on mobile */
    .img_responsive {
        margin-bottom: 1rem;
    }
    
    /* Smaller service icons on mobile */
    .service-icon img {
        max-width: 200px;
    }
    
    /* Product grid adjustments */
    .product-card img {
        height: 250px;
    }
}

/* ===============================================
   Tablet Optimization (768px - 1024px)
   =============================================== */
@media screen and (min-width: 768px) and (max-width: 1024px) {
    .hero-image img,
    .banner-image img {
        min-height: 350px;
        max-height: 500px;
    }
    
    .service-icon img {
        max-width: 250px;
    }
    
    .product-card img {
        height: 280px;
    }
}

/* ===============================================
   Desktop Optimization (> 1024px)
   =============================================== */
@media screen and (min-width: 1025px) {
    .hero-image img,
    .banner-image img {
        min-height: 400px;
        max-height: 600px;
    }
    
    .service-icon img {
        max-width: 300px;
    }
    
    .product-card img {
        height: 300px;
    }
}

/* ===============================================
   High DPI / Retina Display Support
   =============================================== */
@media screen and (-webkit-min-device-pixel-ratio: 2),
       screen and (min-resolution: 192dpi) {
    /* Images will look sharper on retina displays */
    img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* ===============================================
   Print Optimization
   =============================================== */
@media print {
    img {
        max-width: 100%;
        page-break-inside: avoid;
    }
}

/* ===============================================
   Accessibility - Prefers Reduced Motion
   =============================================== */
@media (prefers-reduced-motion: reduce) {
    img {
        animation: none !important;
        transition: none !important;
    }
    
    .product-card:hover img {
        transform: none;
    }
}

/* ===============================================
   Dark Mode Support
   =============================================== */
@media (prefers-color-scheme: dark) {
    img[loading="lazy"] {
        background: linear-gradient(90deg, #2a2a2a 25%, #3a3a3a 50%, #2a2a2a 75%);
    }
    
    .image-container {
        background-color: #2a2a2a;
    }
}

/* ===============================================
   Performance: GPU Acceleration
   =============================================== */
.product-card img,
.service-icon img,
.logo img {
    transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-font-smoothing: subpixel-antialiased;
}

/* ===============================================
   Image Error Handling
   =============================================== */
img::before {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #f0f0f0;
}

img::after {
    content: '\f03e';
    font-family: 'FontAwesome', sans-serif;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    color: #ccc;
}

/* Hide fallback when image loads successfully */
img[src]:not([src=""]) {
    &::before,
    &::after {
        display: none;
    }
}