/* Modern Image Loading Effects */

/* 1. Blur-to-sharp loading (Instagram style) */
.image-blur-load {
    transition: filter 0.3s ease, transform 0.3s ease;
    filter: blur(10px);
    transform: scale(1.02);
}

.image-blur-load.loaded {
    filter: blur(0);
    transform: scale(1);
}

/* 2. Skeleton loading animation */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: 8px;
}

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

/* 3. Progressive image container */
.progressive-image {
    position: relative;
    overflow: hidden;
    background-color: #f5f5f5;
}

.progressive-image .placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, #f0f0f0 25%, transparent 25%), 
                linear-gradient(-45deg, #f0f0f0 25%, transparent 25%), 
                linear-gradient(45deg, transparent 75%, #f0f0f0 75%), 
                linear-gradient(-45deg, transparent 75%, #f0f0f0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    opacity: 0.1;
    animation: move 2s linear infinite;
}

@keyframes move {
    0% { background-position: 0 0, 0 10px, 10px -10px, -10px 0px; }
    100% { background-position: 20px 20px, 20px 30px, 30px 10px, 10px 20px; }
}

/* 4. Image fade-in effect */
.fade-in-image {
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.fade-in-image.loaded {
    opacity: 1;
}

/* 5. Image with loading shimmer */
.shimmer-wrapper {
    position: relative;
    overflow: hidden;
    background-color: #f6f7f8;
}

.shimmer-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
    animation: shimmer 1.5s infinite;
}

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

/* 6. Modern hover effects */
.modern-hover {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.modern-hover:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modern-hover img {
    transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.modern-hover:hover img {
    transform: scale(1.1);
}

/* 7. Loading dots animation */
.loading-dots {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.loading-dots::after {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: currentColor;
    animation: dot-flashing 1.4s infinite linear alternate;
    animation-delay: 0.5s;
}

.loading-dots::before {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: currentColor;
    animation: dot-flashing 1.4s infinite linear alternate;
    animation-delay: 0s;
}

@keyframes dot-flashing {
    0% { opacity: 0.2; }
    50%, 100% { opacity: 1; }
}

/* 8. Intersection Observer loading */
.lazy-load {
    transition: opacity 0.3s ease;
    opacity: 0;
}

.lazy-load.loaded {
    opacity: 1;
}

/* 9. Grid loading animation */
.grid-item {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
    transform: translateY(20px);
}

.grid-item:nth-child(1) { animation-delay: 0.1s; }
.grid-item:nth-child(2) { animation-delay: 0.2s; }
.grid-item:nth-child(3) { animation-delay: 0.3s; }
.grid-item:nth-child(4) { animation-delay: 0.4s; }
.grid-item:nth-child(5) { animation-delay: 0.5s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 10. Preload hint styles */
.preload-hint {
    position: relative;
}

.preload-hint::after {
    content: '⚡';
    position: absolute;
    top: 4px;
    right: 4px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 2px 4px;
    border-radius: 4px;
    font-size: 10px;
    opacity: 0;
    transition: opacity 0.3s;
}

.preload-hint:hover::after {
    opacity: 1;
}