/* Blog Article Specific Styles */

/* Page-level styles */
.blog-article-page {
    background: var(--neutral-50);
    min-height: 100vh;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-600);
    color: white;
    padding: 0.5rem 1rem;
    text-decoration: none;
    z-index: 10000;
    border-radius: 0 0 var(--radius-md) 0;
    font-weight: 600;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--primary-300);
    outline-offset: 2px;
}

/* Focus Indicators - Ensure all interactive elements have visible focus */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus,
[tabindex]:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* Main content area */
.blog-article-main {
    padding: var(--space-8) 0;
    background: var(--neutral-50);
}

.blog-article-main .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* Breadcrumb Navigation */
.breadcrumb-nav {
    margin-bottom: var(--space-6);
    padding: var(--space-3) 0;
}

.breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.5;
}

.breadcrumb-item {
    display: inline-flex;
    align-items: center;
}

.breadcrumb-link {
    color: var(--primary-600);
    text-decoration: none;
    transition: all 0.2s ease;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

.breadcrumb-link:hover {
    color: var(--primary-700);
    background: var(--primary-50);
    text-decoration: underline;
}

.breadcrumb-link:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

.breadcrumb-separator {
    color: var(--neutral-400);
    font-size: 1rem;
    user-select: none;
    padding: 0 0.25rem;
}

.breadcrumb-item[aria-current="page"] {
    color: var(--neutral-700);
}

.breadcrumb-current {
    font-weight: 500;
    color: var(--neutral-700);
    padding: 0.25rem 0.5rem;
}

/* Article Container */
.blog-article {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-12) var(--space-8);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    margin-bottom: var(--space-12);
}

/* Article Header */
.article-header {
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-6);
    border-bottom: 2px solid var(--neutral-200);
}

/* Back to Blog Button */
.article-actions-top {
    margin-bottom: var(--space-6);
}

.back-to-blog-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.625rem 1.25rem;
    background: var(--primary-600);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: all 0.2s ease;
    border: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.back-to-blog-btn:hover {
    background: var(--primary-700);
    transform: translateX(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.back-to-blog-btn:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

.back-to-blog-btn svg {
    flex-shrink: 0;
}

/* Article Metadata */
.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
    font-size: 0.875rem;
    color: var(--neutral-600);
}

.article-category {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: var(--primary-100);
    color: var(--primary-700);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1;
}

.meta-separator {
    color: var(--neutral-400);
    font-weight: 300;
    user-select: none;
}

.article-date,
.article-updated,
.article-author {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--neutral-600);
    font-size: 0.875rem;
}

.article-date svg,
.article-updated svg,
.article-author svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.article-updated {
    color: var(--neutral-500);
    font-style: italic;
}

.article-author {
    font-weight: 500;
}

/* Article Title */
.article-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--neutral-900);
    line-height: 1.2;
    margin: 0;
    letter-spacing: -0.02em;
}

/* Article Content */
.article-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--neutral-800);
    /* CSS Containment for performance optimization */
    contain: content;
    content-visibility: auto;
}

.article-content h2 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-top: var(--space-12);
    margin-bottom: var(--space-4);
    color: var(--neutral-900);
    line-height: 1.3;
}

.article-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: var(--space-8);
    margin-bottom: var(--space-3);
    color: var(--neutral-900);
    line-height: 1.4;
}

.article-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: var(--space-6);
    margin-bottom: var(--space-3);
    color: var(--neutral-900);
}

.article-content p {
    margin-bottom: var(--space-6);
}

.article-content ul,
.article-content ol {
    margin-bottom: var(--space-6);
    padding-left: var(--space-8);
}

.article-content li {
    margin-bottom: var(--space-2);
}

.article-content li > ul,
.article-content li > ol {
    margin-top: var(--space-2);
    margin-bottom: var(--space-2);
}

.article-content a {
    color: var(--primary-600);
    text-decoration: underline;
    transition: color 0.2s ease;
}

.article-content a:hover {
    color: var(--primary-700);
}

.article-content strong {
    font-weight: 600;
    color: var(--neutral-900);
}

.article-content em {
    font-style: italic;
}

.article-content code {
    background: var(--neutral-100);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono, 'Courier New', monospace);
    font-size: 0.9em;
    color: var(--primary-700);
    border: 1px solid var(--neutral-200);
}

.article-content pre {
    background: var(--neutral-900);
    color: var(--neutral-100);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: var(--space-6) 0;
    line-height: 1.6;
}

.article-content pre code {
    background: none;
    color: inherit;
    padding: 0;
    border: none;
    font-size: 0.9375rem;
}

.article-content blockquote {
    margin: var(--space-6) 0;
    padding: var(--space-4) var(--space-6);
    border-left: 4px solid var(--primary-500);
    background: var(--neutral-50);
    font-style: italic;
    color: var(--neutral-700);
}

.article-content blockquote p:last-child {
    margin-bottom: 0;
}

.article-content table {
    width: 100%;
    margin: var(--space-6) 0;
    border-collapse: collapse;
    font-size: 0.9375rem;
}

.article-content table th,
.article-content table td {
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--neutral-200);
    text-align: left;
}

.article-content table th {
    background: var(--neutral-100);
    font-weight: 600;
    color: var(--neutral-900);
}

.article-content table tr:nth-child(even) {
    background: var(--neutral-50);
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: var(--space-6) 0;
}

.article-content hr {
    margin: var(--space-12) 0;
    border: none;
    border-top: 2px solid var(--neutral-200);
}

/* Related Articles Section */
.related-articles-section {
    margin-top: var(--space-16);
    padding-top: var(--space-12);
    border-top: 2px solid var(--neutral-200);
}

.related-articles-section .section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin-bottom: var(--space-8);
    text-align: center;
}

.related-articles-section .articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

/* Reuse article card styles from main site */
.related-articles-section .article-card {
    display: block;
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid var(--neutral-200);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.related-articles-section .article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-300);
}

.related-articles-section .article-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--neutral-900);
    margin-bottom: var(--space-3);
    line-height: 1.4;
}

.related-articles-section .article-card-excerpt {
    font-size: 0.9375rem;
    color: var(--neutral-600);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.related-articles-section .article-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.related-articles-section .read-more-link {
    color: var(--primary-600);
    font-weight: 500;
    font-size: 0.9375rem;
}

.related-articles-section .article-card:hover .read-more-link {
    color: var(--primary-700);
}

/* View all articles fallback */
.view-all-articles-link {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    background: var(--primary-600);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-align: center;
    transition: all 0.2s ease;
}

.view-all-articles-link:hover {
    background: var(--primary-700);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Responsive Design */

/* Tablet and smaller laptops (1024px and below) */
@media (max-width: 1024px) {
    .blog-article {
        padding: var(--space-10) var(--space-6);
    }
    
    .article-title {
        font-size: 2.25rem;
    }
    
    .article-content h2 {
        font-size: 1.75rem;
    }
    
    .article-content h3 {
        font-size: 1.375rem;
    }
    
    /* Ensure related articles grid is responsive */
    .related-articles-section .articles-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

/* Tablet and mobile (768px and below) */
@media (max-width: 768px) {
    .blog-article-main {
        padding: var(--space-6) 0;
    }
    
    .blog-article-main .container {
        padding: 0 var(--space-4);
    }
    
    .blog-article {
        padding: var(--space-8) var(--space-5);
        border-radius: var(--radius-md);
    }
    
    /* Typography scaling for tablet/mobile */
    .article-title {
        font-size: 2rem;
        line-height: 1.25;
    }
    
    .article-content {
        font-size: 1rem;
        line-height: 1.7;
    }
    
    .article-content h2 {
        font-size: 1.5rem;
        margin-top: var(--space-8);
    }
    
    .article-content h3 {
        font-size: 1.25rem;
        margin-top: var(--space-6);
    }
    
    .article-content h4 {
        font-size: 1.125rem;
    }
    
    /* Related articles stack on mobile */
    .related-articles-section .articles-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    /* Breadcrumb adjustments */
    .breadcrumb-nav {
        margin-bottom: var(--space-4);
        padding: var(--space-2) 0;
    }
    
    .breadcrumb-list {
        font-size: 0.8125rem;
        gap: var(--space-1);
    }
    
    .breadcrumb-link,
    .breadcrumb-current {
        padding: 0.375rem 0.5rem; /* Increased for better touch targets */
        min-height: 32px; /* Ensure adequate touch target height */
        display: inline-flex;
        align-items: center;
    }
    
    .breadcrumb-separator {
        padding: 0 0.25rem;
        font-size: 0.875rem;
    }
    
    /* Ensure back button is full width and has good touch target */
    .back-to-blog-btn {
        padding: 0.875rem 1.5rem; /* Increased padding for better touch target */
        min-height: 48px; /* Ensure 48px minimum touch target */
        font-size: 1rem;
    }
    
    /* Article metadata adjustments */
    .article-meta {
        gap: var(--space-2);
    }
    
    /* Ensure article cards have good touch targets */
    .related-articles-section .article-card {
        min-height: 120px; /* Ensure adequate touch target */
        padding: var(--space-5);
    }
    
    /* Table responsiveness */
    .article-content table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    /* Code block scrolling */
    .article-content pre {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* Small mobile devices (414px and below) */
@media (max-width: 414px) {
    .blog-article {
        padding: var(--space-6) var(--space-4);
    }
    
    .article-title {
        font-size: 1.875rem;
        line-height: 1.3;
    }
    
    .article-content h2 {
        font-size: 1.375rem;
    }
    
    .article-content h3 {
        font-size: 1.125rem;
    }
    
    /* Ensure touch targets remain adequate */
    .breadcrumb-link,
    .breadcrumb-current {
        padding: 0.5rem 0.625rem;
        min-height: 36px;
    }
}

/* Extra small mobile devices (375px and below) */
@media (max-width: 375px) {
    .article-title {
        font-size: 1.75rem;
    }
    
    .article-content {
        font-size: 0.9375rem;
    }
    
    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-2);
    }
    
    .meta-separator {
        display: none;
    }
    
    .back-to-blog-btn {
        width: 100%;
        justify-content: center;
        padding: 0.875rem 1rem;
        min-height: 48px; /* Maintain 48px touch target */
    }
    
    .article-category {
        padding: 0.375rem 0.875rem;
        font-size: 0.75rem;
        min-height: 28px;
    }
    
    .article-date,
    .article-updated,
    .article-author {
        font-size: 0.8125rem;
        min-height: 32px;
        display: flex;
        align-items: center;
    }
    
    /* Breadcrumb adjustments for small screens */
    .breadcrumb-list {
        font-size: 0.75rem;
    }
    
    .breadcrumb-link,
    .breadcrumb-current {
        padding: 0.5rem 0.625rem;
        min-height: 36px;
    }
    
    .breadcrumb-current {
        /* Truncate long titles on small screens */
        max-width: 180px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    
    /* Related articles section */
    .related-articles-section .section-title {
        font-size: 1.5rem;
    }
    
    .related-articles-section .article-card {
        padding: var(--space-4);
    }
    
    .related-articles-section .article-card-title {
        font-size: 1.125rem;
    }
}

/* Very small mobile devices (320px) */
@media (max-width: 320px) {
    .blog-article-main .container {
        padding: 0 var(--space-3);
    }
    
    .blog-article {
        padding: var(--space-5) var(--space-3);
    }
    
    .article-title {
        font-size: 1.5rem;
        line-height: 1.3;
    }
    
    .article-content {
        font-size: 0.875rem;
    }
    
    .article-content h2 {
        font-size: 1.25rem;
    }
    
    .article-content h3 {
        font-size: 1.0625rem;
    }
    
    .article-content h4 {
        font-size: 1rem;
    }
    
    /* Breadcrumb for very small screens */
    .breadcrumb-current {
        max-width: 140px;
    }
    
    .breadcrumb-link,
    .breadcrumb-current {
        font-size: 0.6875rem;
        padding: 0.5rem 0.5rem;
        min-height: 36px;
    }
    
    /* Ensure buttons remain tappable */
    .back-to-blog-btn {
        font-size: 0.9375rem;
        padding: 0.875rem 0.875rem;
        min-height: 48px;
    }
    
    /* Related articles */
    .related-articles-section .section-title {
        font-size: 1.375rem;
    }
    
    .related-articles-section .article-card-title {
        font-size: 1rem;
    }
    
    .related-articles-section .article-card-excerpt {
        font-size: 0.875rem;
    }
}

/* Print Styles */
@media print {
    /* Hide navigation and UI elements (Requirements 10.1, 10.2) */
    .main-nav,
    .gguf-banner,
    .premium-header,
    .breadcrumb-nav,
    .article-actions,
    .article-actions-top,
    .related-articles-section,
    .premium-footer,
    .skip-link {
        display: none !important;
    }
    
    /* Print-friendly colors (Requirement 10.3) */
    body,
    .blog-article-page {
        background: white !important;
    }
    
    .blog-article-main {
        padding: 0;
        background: white !important;
    }
    
    .blog-article {
        box-shadow: none;
        padding: 0;
        border-radius: 0;
        background: white !important;
    }
    
    .article-content {
        max-width: 100%;
        font-size: 12pt;
        color: black;
    }
    
    .article-title {
        font-size: 24pt;
        color: black;
    }
    
    .article-content h2 {
        font-size: 18pt;
        color: black;
        page-break-after: avoid;
    }
    
    .article-content h3 {
        font-size: 14pt;
        color: black;
        page-break-after: avoid;
    }
    
    .article-content a {
        color: black;
        text-decoration: underline;
    }
    
    .article-content a[href]::after {
        content: " (" attr(href) ")";
        font-size: 10pt;
        color: #666;
    }
    
    /* Prevent page breaks in code blocks (Requirement 10.4) */
    .article-content pre {
        background: #f5f5f5;
        color: black;
        border: 1px solid #ddd;
        page-break-inside: avoid;
        break-inside: avoid;
    }
    
    .article-content code {
        background: #f5f5f5;
        color: black;
        border: 1px solid #ddd;
    }
    
    .article-content pre code {
        page-break-inside: avoid;
        break-inside: avoid;
    }
    
    .article-content blockquote {
        border-left: 4px solid #333;
        background: #f9f9f9;
        color: black;
        page-break-inside: avoid;
        break-inside: avoid;
    }
    
    .article-content table {
        page-break-inside: avoid;
    }
    
    /* Hide back button and show metadata in print */
    .article-actions-top {
        display: none !important;
    }
    
    .article-meta {
        color: #666;
        margin-bottom: 1rem;
    }
    
    .article-category {
        background: #f0f0f0;
        color: #333;
    }
    
    .article-date svg,
    .article-updated svg,
    .article-author svg {
        display: none;
    }
    
    /* Add print-specific information */
    .article-header::after {
        content: "Published: " attr(data-publish-date) " | URL: " attr(data-url);
        display: block;
        margin-top: 1rem;
        padding-top: 1rem;
        border-top: 1px solid #ddd;
        font-size: 9pt;
        color: #666;
        font-style: italic;
        word-break: break-all;
    }
    
    /* Ensure page breaks are handled properly */
    .article-content h2,
    .article-content h3,
    .article-content h4 {
        page-break-after: avoid;
        page-break-inside: avoid;
    }
    
    .article-content p,
    .article-content ul,
    .article-content ol {
        orphans: 3;
        widows: 3;
    }
    
    .article-content img {
        page-break-inside: avoid;
        page-break-after: avoid;
    }
}