/**
 * Core Web Vitals Optimization CSS
 * Optimizes LCP, FID, and CLS for better Google rankings
 */

/* LCP (Largest Contentful Paint) Optimization */
.hero-section {
    /* Preload critical images */
    background-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB2aWV3Qm94PSIwIDAgMSAxIiBmaWxsPSJub25lIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjxyZWN0IHdpZHRoPSIxIiBoZWlnaHQ9IjEiIGZpbGw9IiNmMGYwZjAiLz48L3N2Zz4=');
    background-size: cover;
    background-position: center;
    min-height: 400px;
    contain: layout style paint;
}

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

/* FID (First Input Delay) Optimization */
/* Remove layout-blocking resources */
.critical-css {
    font-display: swap;
}

/* Optimize font loading */
@font-face {
    font-family: 'Vazirmatn';
    font-display: swap;
    src: url('https://fonts.gstatic.com/s/vazirmatn/v33s7r6md3Valvmjb1fPhtVSDM26YlPce70v66YlPce70vJJI.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
}

/* CLS (Cumulative Layout Shift) Prevention */
/* Reserve space for dynamic content */
.image-container {
    aspect-ratio: 16/9;
    background-color: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Prevent layout shifts from fonts */
body {
    font-family: 'Vazirmatn', system-ui, -apple-system, sans-serif;
}

/* Reserve space for ads and dynamic content */
.ad-container {
    min-height: 250px;
    background-color: #f9fafb;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Optimize carousel to prevent CLS */
.carousel-container {
    height: 400px;
    overflow: hidden;
    position: relative;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.carousel-item.active {
    opacity: 1;
}

/* Optimize images to prevent CLS */
img {
    width: 100%;
    height: auto;
    display: block;
}

/* Lazy loading with placeholder */
img[data-src] {
    background-color: #f3f4f6;
    background-image: linear-gradient(90deg, #f3f4f6 25%, #e5e7eb 50%, #f3f4f6 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

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

/* Optimize JavaScript execution */
.defer-script {
    loading: lazy;
}

/* Reduce paint complexity */
.optimized-element {
    contain: layout style paint;
    will-change: auto;
}

/* Optimize animations for better performance */
@media (prefers-reduced-motion: no-preference) {
    .smooth-transition {
        transition: transform 0.3s ease, opacity 0.3s ease;
    }
}

@media (prefers-reduced-motion: reduce) {
    .smooth-transition {
        transition: none;
    }
}

/* Optimize scrolling performance */
.scroll-container {
    contain: layout style paint;
    transform: translateZ(0);
    -webkit-overflow-scrolling: touch;
}

/* Optimize text rendering */
.text-optimized {
    text-rendering: optimizeSpeed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Prevent layout shifts from dynamic content */
.dynamic-content {
    min-height: 200px;
    contain: layout style;
}

/* Optimize critical rendering path */
.critical-resource {
    preload: true;
    fetchpriority: high;
}

/* Optimize third-party resources */
.third-party {
    loading: lazy;
    importance: low;
}

/* Optimize images for LCP */
.hero-image {
    fetchpriority: high;
    loading: eager;
    width: 100%;
    height: auto;
}

/* Prevent CLS from web fonts */
.font-loading {
    font-display: swap;
    font-family: 'Vazirmatn', system-ui, sans-serif;
}

/* Optimize layout for better CLS */
.layout-stable {
    contain: layout style paint;
    will-change: auto;
}

/* Optimize carousel performance */
.carousel-optimized {
    contain: layout style paint;
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Optimize mobile performance */
@media (max-width: 768px) {
    .mobile-optimized {
        contain: layout style paint;
        will-change: auto;
    }
    
    /* Reduce paint complexity on mobile */
    .mobile-simple {
        box-shadow: none;
        border: 1px solid #e5e7eb;
    }
}

/* Optimize for better FID */
.interactive-element {
    touch-action: manipulation;
    will-change: transform;
}

/* Optimize for better LCP */
.lcp-optimized {
    contain: layout style paint;
    will-change: auto;
}

/* Prevent layout shifts from dynamic imports */
.dynamic-import {
    min-height: 100px;
    background-color: #f9fafb;
}

/* Optimize for better Core Web Vitals */
.core-web-vitals-optimized {
    contain: layout style paint;
    will-change: auto;
    transform: translateZ(0);
}