/* 
   Image Optimization and Responsive Images CSS
   Provides optimized loading states and responsive behavior
*/

/* Base image optimization */
img {
    /* Ensure proper scaling */
    max-width: 100%;
    height: auto;
    
    /* Add smooth transition for loading states */
    transition: opacity 0.3s ease, filter 0.3s ease;
    
    /* Optimize rendering */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* Loading states */
img[data-src] {
    /* Placeholder while loading */
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    filter: blur(5px);
    opacity: 0.7;
}

img.loaded {
    filter: none !important;
    opacity: 1 !important;
}

img.webp-optimized {
    /* Mark optimized images for debugging */
    border: none;
}

/* Loading animation */
@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Responsive images for different screen sizes */
@media (max-width: 576px) {
    /* Mobile optimization */
    .project-image img,
    .about-image img {
        /* Further compress on mobile */
        image-rendering: auto;
    }
}

@media (min-width: 577px) and (max-width: 768px) {
    /* Tablet optimization */
    .project-image img,
    .about-image img {
        /* Balanced quality for tablets */
        image-rendering: -webkit-optimize-contrast;
    }
}

@media (min-width: 769px) {
    /* Desktop optimization */
    .project-image img,
    .about-image img {
        /* Full quality for desktop */
        image-rendering: crisp-edges;
    }
}

/* Specific optimizations for project gallery */
.project-image {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius-lg, 8px);
}

.project-image img {
    /* Ensure proper aspect ratio */
    width: 100%;
    height: 250px;
    object-fit: cover;
    object-position: center;
    
    /* Smooth hover transitions */
    transition: transform 0.3s ease, filter 0.3s ease;
}

.project-image:hover img {
    transform: scale(1.05);
}

/* About section image optimization */
.about-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg, 8px);
    box-shadow: var(--box-shadow, 0 5px 15px rgba(0, 0, 0, 0.08));
}

/* Performance hints for browsers */
.critical-image {
    /* Mark critical images that should load first */
    loading: eager;
}

.lazy-image {
    /* Mark non-critical images for lazy loading */
    loading: lazy;
}

/* WebP support detection fallback */
.no-webp img[data-webp] {
    /* Fallback for browsers without WebP support */
    opacity: 1;
}

/* Preload critical images hint */
.preload-hint {
    /* Invisible element to hint at critical images */
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}

/* Error state for failed image loads */
img[data-error="true"] {
    background: #f5f5f5;
    border: 2px dashed #ccc;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

img[data-error="true"]:before {
    content: "Image non disponible";
    color: #666;
    font-size: 14px;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    img {
        transition: none;
        animation: none;
    }
    
    .project-image:hover img {
        transform: none;
    }
}