/* Performance optimizations for Dream Travel website */

/* Optimize image rendering */
img {
    backface-visibility: hidden; /* Reduces paint times */
}

/* Add native lazy loading support */
img.lazy {
    transition: opacity 0.3s;
    opacity: 0;
}

img.lazy.loaded {
    opacity: 1;
}

/* Low-quality image placeholders */
.lazy-placeholder {
    filter: blur(10px);
    transform: scale(1.05);
    transition: all 0.5s ease-in-out;
}

.lazy-placeholder.loaded {
    filter: blur(0);
    transform: scale(1);
}

/* Optimize content flickering during load */
.no-js img.lazy {
    display: none;
}

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

/* Improve scrolling performance */
* {
    -webkit-overflow-scrolling: touch; /* Smoother scrolling on iOS */
}

/* Content skeleton placeholders for faster perceived loading */
.content-placeholder {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: placeholderShimmer 2s infinite;
}

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

/* Optimize critical rendering path */
.render-when-visible {
    visibility: hidden;
}

.render-when-visible.is-visible {
    visibility: visible;
}

/* Optimize CSS selectors (more efficient CSS) */
.nav-item .nav-link {
    will-change: opacity;
}

.carousel-item img {
    will-change: opacity, transform;
}

/* Reduce layout shifts */
img, video, iframe {
    aspect-ratio: attr(width) / attr(height);
}

/* For partners logos scrolling */
.partners-logos {
    display: flex;
    align-items: center;
    gap: 20px;
    overflow-x: auto;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    padding: 10px 0;
    scrollbar-width: none; /* Firefox */
}

.partners-logos::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Edge */
}

.partner-logo {
    flex: 0 0 auto;
    height: 50px;
    width: auto;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all 0.3s ease;
}

.partner-logo:hover {
    filter: grayscale(0);
    opacity: 1;
}