/*
 * WebP Image Optimization Styles
 * 
 * Styles for lazy loading and image optimization
 * 
 * @package SNN-BRX-WIL
 * @since 1.0.0
 */

/* ========================================
   LAZY LOADING STYLES
   ======================================== */

.snn-lazy-image {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.snn-lazy-image.loaded {
    opacity: 1;
}

.snn-lazy-image.loading {
    background: #f3f4f6;
    background-image: linear-gradient(90deg, #f3f4f6 25%, #e5e7eb 50%, #f3f4f6 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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

/* ========================================
   PLACEHOLDER STYLES
   ======================================== */

.snn-image-placeholder {
    background: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #9ca3af;
    font-size: 14px;
    min-height: 200px;
}

.snn-image-placeholder::before {
    content: "🖼️";
    font-size: 24px;
    margin-right: 8px;
}

/* ========================================
   RESPONSIVE IMAGES
   ======================================== */

.snn-responsive-image {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ========================================
   CRITICAL IMAGE STYLES
   ======================================== */

.snn-critical-image {
    /* Ensure critical images load immediately */
    opacity: 1 !important;
    transition: none !important;
}

/* ========================================
   WEBP FALLBACK STYLES
   ======================================== */

.no-webp .snn-webp-image {
    display: none;
}

.webp .snn-fallback-image {
    display: none;
}

/* ========================================
   LOADING STATES
   ======================================== */

.snn-image-container {
    position: relative;
    overflow: hidden;
}

.snn-image-container::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #f3f4f6;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    pointer-events: none;
}

.snn-image-container.loading::after {
    opacity: 1;
}

.snn-image-container.loaded::after {
    opacity: 0;
}

/* ========================================
   OPTIMIZATION INDICATORS
   ======================================== */

.snn-webp-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: #10b981;
    color: white;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: bold;
    text-transform: uppercase;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.snn-image-container:hover .snn-webp-badge {
    opacity: 1;
}

/* ========================================
   MOBILE OPTIMIZATIONS
   ======================================== */

@media (max-width: 768px) {
    .snn-lazy-image {
        /* Faster transitions on mobile */
        transition: opacity 0.2s ease-in-out;
    }
    
    .snn-image-placeholder {
        min-height: 150px;
        font-size: 12px;
    }
    
    .snn-image-placeholder::before {
        font-size: 20px;
    }
}

/* ========================================
   HIGH DPI DISPLAYS
   ======================================== */

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .snn-lazy-image {
        /* Ensure crisp images on retina displays */
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

.snn-lazy-image:focus {
    outline: 2px solid #2271b1;
    outline-offset: 2px;
}

.snn-image-container[aria-label] {
    cursor: pointer;
}

/* ========================================
   PERFORMANCE OPTIMIZATIONS
   ======================================== */

.snn-lazy-image {
    /* Use GPU acceleration */
    transform: translateZ(0);
    will-change: opacity;
}

.snn-image-container {
    /* Optimize repaints */
    contain: layout style paint;
}