/**
 * Lazy Loading Styles
 * Improves page performance by deferring image loading
 */

/* Base styles for lazy-loaded images */
img[loading="lazy"],
img.lazy-load {
    opacity: 0;
    transition: opacity 0.4s ease-in-out;
}

/* When image is loaded */
img[loading="lazy"].loaded,
img.lazy-load.loaded,
img.lazyloaded {
    opacity: 1;
}

/* Placeholder/skeleton effect */
.lazy-wrapper {
    position: relative;
    background: linear-gradient(90deg, #f0f0f0 25%, #e8e8e8 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

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

/* Blur-up effect */
.lazy-blur {
    filter: blur(10px);
    transition: filter 0.3s ease-out;
}

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

/* Fade-up effect */
.lazy-fade {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.lazy-fade.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* For background images with lazy loading */
.lazy-bg {
    background-image: none !important;
    transition: background-image 0.3s ease;
}

.lazy-bg.loaded {
    /* Background image set via JavaScript - ready state */
    background-size: cover;
}

/* Aspect ratio containers to prevent layout shift */
.lazy-container {
    position: relative;
    overflow: hidden;
}

.lazy-container::before {
    content: "";
    display: block;
}

/* Common aspect ratios */
.lazy-container--16x9::before {
    padding-top: 56.25%;
}

.lazy-container--4x3::before {
    padding-top: 75%;
}

.lazy-container--1x1::before {
    padding-top: 100%;
}

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

/* Loading spinner for images */
.lazy-spinner {
    position: relative;
}

.lazy-spinner::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    margin: -15px 0 0 -15px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-top-color: #333;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    opacity: 1;
    transition: opacity 0.3s;
}

.lazy-spinner.loaded::after {
    opacity: 0;
    pointer-events: none;
}

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

/* Performance optimization - will-change hint */
img[loading="lazy"] {
    will-change: opacity;
}