/* Critical CSS for performance optimizations */

/* Prevent layout shift for images */
.article-image {
    aspect-ratio: 16/9;
    object-fit: cover;
    background-color: #f5f5f5;
    width: 100%;
    display: block;
}

/* Container stability */
.articles-container {
    min-height: 400px;
}

.articles-container-hp {
    min-height: 400px;
}

/* Loading animations */
@keyframes shimmer {
    0% { background-position: -200px 0; }
    100% { background-position: calc(200px + 100%) 0; }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Optimize carousel performance */
.slick-track {
    will-change: transform;
}

.slick-list:not(.slick-dragging) .slick-track {
    will-change: auto;
}

/* Loading placeholder optimizations */
.loading-placeholder {
    contain: layout style paint;
    content-visibility: auto;
    background: linear-gradient(90deg, #f0f0f0 25%, transparent 37%, #f0f0f0 63%);
    background-size: 400% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

/* Loader container stability */
.loader-container {
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loader {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Prevent flash of unstyled content */
img:not([src]) {
    visibility: hidden;
}

img[src] {
    visibility: visible;
}

/* Image placeholder stability */
.image-placeholder {
    background: linear-gradient(90deg, #f0f0f0 25%, transparent 37%, #f0f0f0 63%);
    background-size: 400% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Step info block optimizations */
.step-info-block {
    min-height: 200px;
    contain: layout style paint;
}

.step-info-block .block-image {
    width: 100%;
    height: auto;
    object-fit: cover;
    aspect-ratio: 16/9;
    background-color: #f5f5f5;
}

/* Video container stability */
.video-container {
    position: relative;
    overflow: hidden;
    background-color: #000;
}

.video-container::before {
    content: '';
    display: block;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
}

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

/* Article layout stability */
.article {
    min-height: 300px;
    display: flex;
    flex-direction: column;
}

.article-info {
    flex-grow: 1;
    padding: 1rem 0;
}

/* Mobile optimizations */
@media (max-width: 768px) {
    .slick-slider {
        -webkit-transform: translateZ(0);
        transform: translateZ(0);
    }
    
    .article-image {
        aspect-ratio: 4/3; /* Different ratio for mobile */
    }
    
    .articles-container,
    .articles-container-hp {
        min-height: 300px;
    }
    
    .step-info-block {
        min-height: 150px;
    }
}

/* Focus indicators for accessibility */
.event_internal_link:focus,
.event_outbound_link:focus {
    outline: 2px solid #0066cc;
    outline-offset: 2px;
}

/* Optimize for larger screens */
@media (min-width: 1200px) {
    .articles-container-hp {
        contain: layout style;
    }
    
    .article-image {
        aspect-ratio: 16/9;
    }
}

/* Performance optimizations for carousel */
.slick-slide {
    height: auto;
    min-height: 300px;
}

.slick-slide > div {
    height: 100%;
}

.slick-dots {
    bottom: -45px;
}

/* Prevent layout shift in image containers */
.image-container {
    position: relative;
    overflow: hidden;
    background-color: #f5f5f5;
}

.image-container::before {
    content: '';
    display: block;
    padding-bottom: 56.25%; /* Default 16:9 aspect ratio */
}

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

/* Optimize text rendering */
.text-block {
    contain: style;
}

/* Loading states */
.lcp {
    content-visibility: auto;
}

/* Reduce paint operations */
.article-wide,
.article-normal {
    contain: layout style paint;
}