/* Lazy Loading Styles */
img[data-src],
[data-background] {
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

img.lazy-loaded,
[data-background].lazy-loaded {
    opacity: 1;
}

/* Section animations */
.section-hidden {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Skeleton loading effect */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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