/**
 * WPMINI Image Optimization - Advanced CSS
 * 
 * This CSS provides styles for advanced image optimization features:
 * - Placeholder styles
 * - Transition effects
 * - Loading states
 * - Error handling
 * 
 * @package WPMINI
 * @version 1.0.0
 */

/* Image Optimization Container */
.wpmini-image-container {
    position: relative;
    overflow: hidden;
    background-color: #f8f9fa;
}

/* Placeholder Styles */
img.wpmini-placeholder,
img.wpmini-placeholder-solid {
    position: relative;
    transition: opacity 0.3s ease-in-out;
}

/* Blur-up Placeholder */
img.wpmini-placeholder {
    background-size: cover !important;
    background-position: center !important;
    background-repeat: no-repeat !important;
    filter: blur(10px);
    transform: scale(1.1);
}

/* Solid Color Placeholder */
img.wpmini-placeholder-solid {
    background-color: #f0f0f0 !important;
    background-size: cover !important;
    background-position: center !important;
}

/* Loading State */
img.wpmini-prepared {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

/* Optimized State */
img.wpmini-optimized {
    opacity: 1;
    transition: opacity 0.3s ease-in-out;
}

/* Error State */
img.wpmini-error {
    opacity: 1;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
}

/* Loading Spinner */
.wpmini-loading-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: wpmini-spin 1s linear infinite;
    z-index: 10;
}

@keyframes wpmini-spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Progressive Loading Bar */
.wpmini-progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    width: 0%;
    transition: width 0.3s ease-in-out;
    z-index: 5;
}

/* Image Container Enhancements */
.wpmini-image-wrapper {
    position: relative;
    display: inline-block;
    max-width: 100%;
}

.wpmini-image-wrapper img {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Responsive Image Enhancements */
img[srcset] {
    max-width: 100%;
    height: auto;
}

/* Gallery Specific Styles */
.wp-block-gallery img.wpmini-placeholder,
.gallery img.wpmini-placeholder {
    background-size: cover !important;
    background-position: center !important;
}

/* Lightbox Integration */
.wpmini-lightbox img.wpmini-placeholder {
    background-size: contain !important;
    background-position: center !important;
}

/* Performance Monitoring */
.wpmini-performance-indicator {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 15px;
    border-radius: 5px;
    font-size: 12px;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.wpmini-performance-indicator.show {
    opacity: 1;
}

.wpmini-performance-indicator .stats {
    margin-bottom: 5px;
}

.wpmini-performance-indicator .progress {
    width: 100%;
    height: 4px;
    background: #333;
    border-radius: 2px;
    overflow: hidden;
}

.wpmini-performance-indicator .progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    transition: width 0.3s ease-in-out;
}

/* Accessibility */
img.wpmini-placeholder[alt]::before {
    content: attr(alt);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #666;
    font-size: 14px;
    text-align: center;
    max-width: 80%;
    word-wrap: break-word;
}

/* Print Styles */
@media print {
    .wpmini-placeholder,
    .wpmini-loading-spinner,
    .wpmini-progress-bar,
    .wpmini-performance-indicator {
        display: none !important;
    }
    
    img.wpmini-optimized {
        opacity: 1 !important;
        filter: none !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .wpmini-placeholder {
        filter: contrast(1.5);
    }
    
    .wpmini-performance-indicator {
        background: #000;
        border: 2px solid #fff;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    img.wpmini-placeholder,
    img.wpmini-prepared,
    img.wpmini-optimized,
    .wpmini-loading-spinner,
    .wpmini-progress-bar {
        transition: none !important;
        animation: none !important;
    }
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .wpmini-performance-indicator {
        bottom: 10px;
        right: 10px;
        font-size: 11px;
        padding: 8px 12px;
    }
    
    .wpmini-loading-spinner {
        width: 30px;
        height: 30px;
        border-width: 2px;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .wpmini-image-container {
        background-color: #2d3748;
    }
    
    .wpmini-placeholder-solid {
        background-color: #4a5568 !important;
    }
    
    .wpmini-performance-indicator {
        background: rgba(255, 255, 255, 0.9);
        color: #000;
    }
    
    .wpmini-performance-indicator .progress {
        background: #e2e8f0;
    }
}

/* Focus States for Accessibility */
img.wpmini-placeholder:focus,
img.wpmini-optimized:focus {
    outline: 2px solid #3498db;
    outline-offset: 2px;
}

/* Loading States for Different Image Types */
img.wpmini-placeholder[data-wpmini-type="hero"] {
    background-size: cover !important;
    min-height: 200px;
}

img.wpmini-placeholder[data-wpmini-type="thumbnail"] {
    background-size: cover !important;
    min-height: 100px;
}

img.wpmini-placeholder[data-wpmini-type="gallery"] {
    background-size: cover !important;
    min-height: 150px;
}

/* Custom Placeholder Patterns */
.wpmini-placeholder-pattern {
    background-image: 
        linear-gradient(45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(-45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #f0f0f0 75%),
        linear-gradient(-45deg, transparent 75%, #f0f0f0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

/* Error State Enhancements */
img.wpmini-error::after {
    content: "⚠️";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    color: #dc3545;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Success State */
img.wpmini-optimized::after {
    content: "✓";
    position: absolute;
    top: 5px;
    right: 5px;
    background: #28a745;
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

img.wpmini-optimized:hover::after {
    opacity: 1;
}