/* Performance optimizations */

/* Critical CSS inlined in head */
.critical {
    font-display: swap;
}

/* Lazy loading styles */
img.lazy {
    opacity: 0;
    transition: opacity 0.3s;
}

img.lazy.loaded {
    opacity: 1;
}

/* Preload important resources */
.preload-hero {
    background-image: url('../images/eye-surgery.webp');
    background-size: cover;
    background-position: center;
}

/* Optimize animations for performance */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* GPU acceleration for smooth animations */
.gpu-accelerated {
    transform: translateZ(0);
    will-change: transform;
}

/* Optimize scroll performance */
.scroll-optimized {
    contain: layout style paint;
}

/* Loading states */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Optimize images */
img {
    max-width: 100%;
    height: auto;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* Logo image specific styles - override general img styles */
.logo-img {
    display: block !important;
    height: 100px !important;
    width: auto !important;
    max-height: 100px !important;
    max-width: 250px !important;
    object-fit: contain !important;
    object-position: center !important;
    border-radius: 4px !important;
    box-shadow: none !important;
}

/* Optimize fonts */
@font-face {
    font-family: 'System';
    src: local('Arial'), local('Helvetica'), local('sans-serif');
    font-display: swap;
}

/* Critical path optimization */
.above-fold {
    contain: layout;
}

.below-fold {
    contain: layout style paint;
}