/* ==========================================
   SEO & Performance Enhancements
   Additional styles for better SEO and user experience
   ========================================== */

/* ==========================================
   Skip to Content (Accessibility & SEO)
   ========================================== */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-sm) var(--space-lg);
    text-decoration: none;
    font-weight: 600;
    z-index: 10000;
    border-radius: 0 0 var(--radius-sm) 0;
    transition: top var(--transition-base);
}

.skip-to-content:focus {
    top: 0;
}

/* ==========================================
   Structured Data Visibility
   ========================================== */
.structured-data {
    display: none;
}

/* ==========================================
   Breadcrumbs (SEO Enhancement)
   ========================================== */
.breadcrumbs {
    padding: var(--space-lg) 0;
    font-size: var(--text-sm);
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    list-style: none;
    padding: 0;
    margin: 0;
}

.breadcrumbs li {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.breadcrumbs li:not(:last-child)::after {
    content: '›';
    color: var(--color-dark-gray);
    font-size: var(--text-lg);
}

.breadcrumbs a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

.breadcrumbs a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.breadcrumbs li:last-child {
    color: var(--color-dark-gray);
}

/* ==========================================
   Article Metadata (Rich Snippets)
   ========================================== */
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin: var(--space-lg) 0;
    padding: var(--space-md) 0;
    border-top: 1px solid var(--color-mid-gray);
    border-bottom: 1px solid var(--color-mid-gray);
    font-size: var(--text-sm);
    color: var(--color-dark-gray);
}

.article-meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* ==========================================
   Social Share Buttons (Engagement)
   ========================================== */
.social-share {
    display: flex;
    gap: var(--space-sm);
    margin: var(--space-xl) 0;
}

.social-share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--color-light-gray);
    color: var(--color-charcoal);
    transition: var(--transition-base);
    text-decoration: none;
}

.social-share-btn:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

/* ==========================================
   Related Content (Internal Linking for SEO)
   ========================================== */
.related-content {
    background: var(--color-light-gray);
    padding: var(--space-2xl);
    border-radius: var(--radius-lg);
    margin: var(--space-3xl) 0;
}

.related-content h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.related-links {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--space-md);
    list-style: none;
    padding: 0;
}

.related-link {
    background: var(--color-white);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-primary);
    transition: var(--transition-base);
}

.related-link:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.related-link a {
    color: var(--color-charcoal);
    text-decoration: none;
    font-weight: 500;
}

.related-link a:hover {
    color: var(--color-primary);
}

/* ==========================================
   FAQ Schema (Structured Data)
   ========================================== */
.faq-section {
    margin: var(--space-3xl) 0;
}

.faq-item {
    background: var(--color-white);
    padding: var(--space-xl);
    margin-bottom: var(--space-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-mid-gray);
}

.faq-question {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-black);
    margin-bottom: var(--space-md);
}

.faq-answer {
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--color-dark-gray);
}

/* ==========================================
   Optimized Images (Lazy Loading Placeholder)
   ========================================== */
.img-wrapper {
    position: relative;
    background: var(--color-light-gray);
    overflow: hidden;
}

.img-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.img-wrapper img.loaded {
    opacity: 1;
}

.img-wrapper::before {
    content: '';
    display: block;
    padding-top: 56.25%; /* 16:9 aspect ratio */
}

/* ==========================================
   Print Styles (SEO & Accessibility)
   ========================================== */
@media print {
    .nav-container,
    .lang-toggle,
    .mobile-toggle,
    .footer-social,
    .btn,
    .social-share {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
        font-size: 12pt;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 10pt;
        color: #666;
    }
}