/*
 * Performance Optimization Styles
 * Ali Musa Portfolio Theme
 */

/* Lazy Loading Images */
.lazy-image {
    opacity: 0;
    transition: opacity 0.3s ease;
    background: #f0f0f0;
    background-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iODAiIGhlaWdodD0iNjAiIHZpZXdCb3g9IjAgMCA4MCA2MCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPHJlY3Qgd2lkdGg9IjgwIiBoZWlnaHQ9IjYwIiBmaWxsPSIjRjBGMEYwIi8+CjxwYXRoIGQ9Ik0zMCAyNUg1MFYzNUgzMFYyNVoiIGZpbGw9IiNEMEQwRDAiLz4KPHBhdGggZD0iTTM1IDMwTDQwIDM1TDQ1IDMwIiBzdHJva2U9IiNBMEEwQTAiIHN0cm9rZS13aWR0aD0iMSIgZmlsbD0ibm9uZSIvPgo8L3N2Zz4K');
    background-repeat: no-repeat;
    background-position: center;
    background-size: 80px 60px;
}

.lazy-loaded {
    opacity: 1;
}

/* Image placeholder for better CLS */
img[loading="lazy"] {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

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

/* Prevent layout shifts during font loading */
body {
    font-display: swap;
}

/* Critical above-the-fold optimization */
.above-fold {
    contain: layout style paint;
    content-visibility: auto;
}

/* Non-critical below-the-fold content */
.below-fold {
    content-visibility: auto;
    contain-intrinsic-size: 0 500px;
}

/* GPU acceleration for animations */
.gpu-accelerated,
.hero-image,
.portfolio-item,
.service-card {
    transform: translateZ(0);
    will-change: transform;
}

/* Optimize scroll performance */
.smooth-scroll {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    .smooth-scroll {
        scroll-behavior: auto;
    }
}

/* Intersection observer targets */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Preload critical resources */
.critical-resource {
    /* Styles for preloaded resources */
}

/* Minimize reflows and repaints */
.no-reflow {
    position: relative;
    contain: layout;
}

/* Grid performance optimization */
.performance-grid {
    display: grid;
    contain: layout style;
    content-visibility: auto;
}

/* Optimize hover effects */
.hover-optimize {
    transition: transform 0.2s ease;
}

.hover-optimize:hover {
    transform: translateY(-2px);
}

/* Loading states */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
}

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
}

.skeleton-text:last-child {
    margin-bottom: 0;
    width: 80%;
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.skeleton-card {
    padding: 1rem;
}

.skeleton-header {
    height: 200px;
    margin-bottom: 1rem;
}

/* Critical path CSS optimization */
.critical-path {
    /* Only include absolutely necessary styles */
    font-family: system-ui, -apple-system, sans-serif;
    line-height: 1.5;
    color: #333;
}

/* Async CSS loading placeholder */
.async-css-loading {
    /* Minimal styling while CSS loads */
    font-family: system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.4;
    color: #000;
    background: #fff;
}

/* Minimize paint complexity */
.simple-paint {
    border-radius: 4px;
    background: solid #fff;
    /* Avoid gradients and shadows in critical path */
}

/* Optimize scrolling performance */
.scroll-container {
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

/* Reduce paint area */
.contain-paint {
    contain: paint;
    isolation: isolate;
}

/* Service Worker update notification */
.sw-update-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #667eea;
    color: white;
    padding: 1rem;
    text-align: center;
    z-index: 1000;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}

.sw-update-banner.show {
    transform: translateY(0);
}

.sw-update-button {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    margin-left: 1rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.sw-update-button:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Performance metrics display */
.perf-metrics {
    position: fixed;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: monospace;
    z-index: 1001;
    max-width: 200px;
}

.perf-metrics.hidden {
    display: none;
}

/* Connection type optimizations */
@media (max-resolution: 150dpi) and (max-bandwidth: 1Mbps) {
    /* Slow connection optimizations */
    .hero-image {
        background-size: contain;
        background-repeat: no-repeat;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    /* Disable non-essential animations */
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Prefers reduced data */
@media (prefers-reduced-data: reduce) {
    /* Minimize data usage */
    .hero-image {
        background-image: none;
        background-color: #667eea;
    }
    
    .portfolio-item img,
    .service-card img {
        display: none;
    }
    
    /* Disable autoplay media */
    video,
    audio {
        autoplay: false;
    }
}

/* Web Vitals optimization */
.lcp-element {
    /* Largest Contentful Paint optimization */
    contain: layout;
    content-visibility: visible;
}

.cls-prevent {
    /* Cumulative Layout Shift prevention */
    aspect-ratio: 16/9;
    width: 100%;
    height: auto;
}

/* Progressive enhancement markers */
.no-js .js-only {
    display: none;
}

.js .no-js-only {
    display: none;
}

/* Critical resource loading */
.resource-loading {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.resource-loaded {
    opacity: 1;
}

/* Memory usage optimization */
.memory-optimized {
    /* Remove unused properties */
    contain: strict;
    content-visibility: auto;
}

/* Interaction optimizations */
.interaction-ready {
    pointer-events: auto;
    user-select: auto;
}

.interaction-disabled {
    pointer-events: none;
    user-select: none;
    opacity: 0.6;
}

/* Bundle size optimization indicators */
.tree-shaken {
    /* Marker for webpack tree shaking */
}

.code-split {
    /* Marker for dynamic imports */
}

/* Cache-friendly styles */
.cache-friendly {
    /* Styles that work well with caching */
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    padding: 1rem;
    border-radius: 0.375rem;
}


/* Minimize DOM complexity */
.simple-dom {
    /* Avoid deep nesting */
    max-depth: 5;
}

/* Optimize for mobile performance */
@media (max-width: 768px) {
    .mobile-optimized {
        /* Reduce complexity on mobile */
        box-shadow: none;
        border-radius: 0;
        transform: none;
    }
    
    /* Reduce paint layers on mobile */
    .hero-image {
        will-change: auto;
        transform: none;
    }
}

/* Battery optimization */
@media (prefers-reduced-motion: reduce), (prefers-reduced-data: reduce) {
    .battery-friendly {
        /* Reduce CPU intensive operations */
        animation: none;
        transform: none;
        filter: none;
        backdrop-filter: none;
    }
}