/**
 * DC TEKNİK - Performance Styles
 * Image optimization ve performance için CSS
 * Mevcut kodları bozmadan güvenli şekilde eklendi
 */

/* ========================================
   IMAGE OPTIMIZATION
   ======================================== */

/* Image Loading Placeholder */
.img-placeholder {
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.05) 0%,
        rgba(255, 255, 255, 0.1) 50%,
        rgba(255, 255, 255, 0.05) 100%
    );
    background-size: 200% 100%;
    animation: placeholder-shimmer 1.5s ease-in-out infinite;
    border-radius: 4px;
    display: inline-block;
    width: 100%;
    height: 100%;
}

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

/* Image Load States */
img {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

img.img-loaded {
    opacity: 1;
}

/* Lazy Loaded Images */
img[loading="lazy"] {
    content-visibility: auto;
}

/* Image Containment for Performance */
img {
    contain: layout style paint;
}

/* ========================================
   CRITICAL RENDERING PATH
   ======================================== */

/* Above-the-fold content - no animation delay */
.hero-section {
    content-visibility: auto;
}

/* Content Visibility for Performance */
.section {
    content-visibility: auto;
}

/* ========================================
   FONT LOADING OPTIMIZATION
   ======================================== */

/* Font Display Swap */
@font-face {
    font-family: 'Inter';
    font-display: swap;
}

/* Fallback fonts for FOUT (Flash of Unstyled Text) */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Font loading states */
.fonts-loaded body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ========================================
   RESOURCE PRIORITIZATION
   ======================================== */

/* Critical CSS - Inline in production */
/* Above-the-fold styles should be inline */

/* ========================================
   NETWORK AWARENESS
   ======================================== */

/* Slow connection - reduce animations */
@media (prefers-reduced-data: reduce) {
    * {
        animation-duration: 0s !important;
        transition-duration: 0s !important;
    }
    
    img[data-critical="false"] {
        display: none;
    }
}

/* ========================================
   IMAGE FORMAT SUPPORT
   ======================================== */

/* WebP Support */
.webp img[data-webp] {
    content: url(attr(data-webp));
}

/* AVIF Support (Future) */
.avif img[data-avif] {
    content: url(attr(data-avif));
}

/* ========================================
   PERFORMANCE HINTS
   ======================================== */

/* Will-change for animated elements */
.animated-element {
    will-change: transform, opacity;
}

/* Transform optimization */
.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

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

/* Blur-up technique for images */
.lazy-image {
    filter: blur(5px);
    transition: filter 0.3s;
}

.lazy-image.loaded {
    filter: blur(0);
}

/* Fade-in on load */
.fade-in-on-load {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* Responsive image container */
.responsive-image {
    width: 100%;
    height: auto;
    display: block;
}

/* Aspect ratio containers for layout stability */
.aspect-ratio-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 */
}

.aspect-ratio-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ========================================
   PRELOAD INDICATORS
   ======================================== */

/* Show loading state */
.loading-indicator {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 107, 53, 0.3);
    border-top-color: #ff6b35;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ========================================
   MEMORY OPTIMIZATION
   ======================================== */

/* Unload offscreen images */
img:not(.keep-loaded) {
    content-visibility: auto;
}

/* ========================================
   PRINT OPTIMIZATION
   ======================================== */

@media print {
    img {
        max-width: 100%;
        height: auto;
        page-break-inside: avoid;
    }
    
    /* Don't print non-critical images */
    img[data-print="false"] {
        display: none;
    }
}