/* Blog Page Styles - Following UI/UX Style Guide */
/* ================================================ */

/* ========================================
 * BLOG HERO
 * ======================================== */
.blog-hero {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    padding: var(--spacing-xxl) 0;
    margin-bottom: var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.blog-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.5" fill="%23000" opacity="0.02"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.blog-hero .hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.blog-hero .hero-title {
    font-size: clamp(2.25rem, 5vw, 3.25rem);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.blog-hero .hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: 0;
    line-height: 1.5;
    font-weight: var(--font-weight-normal);
}

/* ========================================
 * CATEGORY FILTER CHIPS
 * ======================================== */
.blog-categories {
    margin-bottom: var(--spacing-xl);
    padding: 0 var(--spacing-lg);
}

.category-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.category-chip {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 9999px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.category-chip:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: var(--bg-elevated);
    text-decoration: none;
}

.category-chip.active {
    color: #fff;
    background: var(--primary-color);
    border-color: var(--primary-color);
}

/* ========================================
 * BLOG CARD GRID
 * ======================================== */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--spacing-xl);
    padding: 0 var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

/* ========================================
 * BLOG CARD
 * ======================================== */
.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-subtle);
}

.blog-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: var(--primary-color);
}

.blog-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
    height: 100%;
}

.blog-card-link:hover {
    text-decoration: none;
    color: inherit;
}

.blog-card-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--bg-secondary);
}

.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.blog-card:hover .blog-card-image img {
    transform: scale(1.05);
}

.blog-card-body {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.blog-card-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.blog-card-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-excerpt {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: auto;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-subtle);
}

.blog-card-meta i {
    margin-right: 4px;
}

.blog-card-reading-time {
    white-space: nowrap;
}

/* ========================================
 * EMPTY STATE
 * ======================================== */
.blog-empty {
    padding: var(--spacing-xxl) var(--spacing-lg);
    text-align: center;
}

.blog-empty-content {
    max-width: 400px;
    margin: 0 auto;
}

.blog-empty-content i {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

.blog-empty-content h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.blog-empty-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ========================================
 * PAGINATION
 * ======================================== */
.blog-pagination {
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-xxl);
}

.pagination-list {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
    padding: 0;
    margin: 0;
}

.pagination-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    transition: all 0.2s ease;
}

.pagination-link:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: var(--bg-secondary);
    text-decoration: none;
}

.pagination-info {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: var(--font-weight-medium);
}

/* ========================================
 * BLOG POST PAGE
 * ======================================== */
.blog-post-page {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Breadcrumbs */
.blog-breadcrumbs {
    margin-bottom: var(--spacing-xl);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: var(--font-size-sm);
}

.breadcrumb-list li {
    display: flex;
    align-items: center;
    color: var(--text-muted);
}

.breadcrumb-list li:not(:last-child)::after {
    content: '/';
    margin-left: var(--spacing-xs);
    color: var(--text-muted);
}

.breadcrumb-list a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.breadcrumb-list a:hover {
    color: var(--primary-color);
}

/* Post Header */
.post-header {
    margin-bottom: var(--spacing-xxl);
    text-align: center;
}

.post-category-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    color: #fff;
    background: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-decoration: none;
    margin-bottom: var(--spacing-lg);
    transition: background 0.2s;
}

.post-category-badge:hover {
    background: var(--primary-color-hover);
    color: #fff;
    text-decoration: none;
}

.post-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    line-height: 1.2;
    margin: var(--spacing-md) 0 var(--spacing-lg);
}

.post-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.post-meta i {
    margin-right: 4px;
}

.post-meta-divider {
    color: var(--text-muted);
    opacity: 0.5;
}

/* Post Content */
.post-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.post-content h2 {
    font-size: 1.75rem;
    font-weight: var(--font-weight-semibold);
    margin-top: var(--spacing-xxl);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    line-height: 1.3;
}

.post-content h3 {
    font-size: 1.375rem;
    font-weight: var(--font-weight-semibold);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    line-height: 1.3;
}

.post-content p {
    margin-bottom: var(--spacing-lg);
}

.post-content a {
    color: var(--primary-color);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.post-content a:hover {
    color: var(--primary-color-hover);
}

.post-content ul,
.post-content ol {
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-xl);
}

.post-content li {
    margin-bottom: var(--spacing-sm);
}

.post-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    background: var(--bg-secondary);
    border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
    font-style: italic;
    color: var(--text-secondary);
}

.post-content code {
    font-size: 0.9em;
    padding: 2px 6px;
    background: var(--bg-elevated);
    border-radius: var(--border-radius-sm);
    color: var(--primary-color);
}

.post-content pre {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    overflow-x: auto;
    margin: var(--spacing-xl) 0;
}

.post-content pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
}

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    margin: var(--spacing-lg) 0;
}

/* Post Footer */
.post-footer {
    margin: var(--spacing-xxl) 0;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.back-to-blog {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.back-to-blog:hover {
    color: var(--primary-color);
}

/* ========================================
 * RELATED POSTS
 * ======================================== */
.related-posts {
    margin-top: var(--spacing-xxl);
    padding-top: var(--spacing-xxl);
    border-top: 1px solid var(--border-color);
}

.related-posts-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
}

.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.related-post-card {
    display: block;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    transition: all 0.2s ease;
}

.related-post-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
    text-decoration: none;
}

.related-post-category {
    font-size: 0.7rem;
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.related-post-title {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin: var(--spacing-xs) 0 var(--spacing-sm);
    line-height: 1.3;
}

.related-post-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ========================================
 * RESPONSIVE
 * ======================================== */
@media (max-width: 768px) {
    .blog-hero {
        padding: var(--spacing-xl) var(--spacing-md);
        margin-bottom: var(--spacing-lg);
    }

    .blog-hero .hero-title {
        font-size: 2rem;
    }

    .blog-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        padding: 0 var(--spacing-md);
    }

    .blog-categories {
        padding: 0 var(--spacing-md);
        margin-bottom: var(--spacing-lg);
    }

    .category-chips {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: var(--spacing-sm);
        -webkit-overflow-scrolling: touch;
    }

    .blog-post-page {
        padding: var(--spacing-md);
    }

    .post-title {
        font-size: 1.75rem;
    }

    .post-meta {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .post-meta-divider {
        display: none;
    }

    .related-posts-grid {
        grid-template-columns: 1fr;
    }

    .pagination-list {
        gap: var(--spacing-sm);
    }

    .pagination-link {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .blog-hero .hero-title {
        font-size: 1.75rem;
    }

    .blog-card-title {
        font-size: 1.125rem;
    }

    .post-title {
        font-size: 1.5rem;
    }
}

/* ========================================
 * ACCESSIBILITY & MOTION
 * ======================================== */
@media (prefers-reduced-motion: reduce) {
    .blog-card,
    .related-post-card,
    .pagination-link,
    .category-chip {
        transition: none;
    }

    .blog-card:hover,
    .related-post-card:hover {
        transform: none;
    }

    .blog-card:hover .blog-card-image img {
        transform: none;
    }
}

@media (prefers-contrast: high) {
    .blog-card,
    .related-post-card {
        border: 2px solid var(--border-color);
    }

    .category-chip {
        border: 2px solid var(--border-color);
    }

    .category-chip.active {
        border-color: var(--primary-color);
    }
}

/* ========================================
 * HOMEPAGE LATEST INSIGHTS SECTION
 * ======================================== */
.latest-insights {
    padding: var(--spacing-xxl) 0;
    position: relative;
}

.latest-insights .blog-card--homepage {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.latest-insights .blog-card--homepage .blog-card-link {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.latest-insights .blog-card--homepage .blog-card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.latest-insights .blog-card--homepage .blog-card-title {
    font-size: 1.125rem;
}

.latest-insights .blog-card--homepage .blog-card-meta {
    margin-top: auto;
}

/* Print styles */
@media print {
    .blog-hero {
        background: none !important;
        padding: var(--spacing-lg) 0;
    }

    .blog-categories,
    .blog-pagination,
    .back-to-blog,
    .related-posts {
        display: none;
    }

    .blog-card {
        box-shadow: none;
        border: 1px solid #ccc;
        break-inside: avoid;
    }

    .post-content {
        max-width: 100%;
    }
}

/* ── Data Sources Citation ── */

.post-data-sources {
    max-width: var(--blog-content-width, 780px);
    margin: var(--spacing-lg) auto;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 0.85rem;
}

.data-sources-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.data-sources-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs) var(--spacing-md);
}

.data-source-item {
    display: flex;
    align-items: center;
    gap: 0.3em;
    color: var(--text-secondary);
}

.data-source--verified i {
    color: var(--success-color, #28a745);
}

.data-source--missing i {
    color: var(--warning-color, #ffc107);
}

.data-freshness {
    margin-top: var(--spacing-xs);
    font-size: 0.8rem;
    color: var(--text-tertiary, var(--text-secondary));
    opacity: 0.7;
}