/* ===================================
   ARTICLE PAGE SPECIFIC STYLES
=================================== */

/* ===================================
   ARTICLE HEADER
=================================== */

.breadcrumb {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-lg);
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb-separator {
    margin: 0 var(--spacing-sm);
}

.article-header-title {
    font-family: var(--font-secondary);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    max-width: 900px;
}

.article-header-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.author-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.author-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
}

.author-details {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.author-title {
    font-size: 0.9rem;
    color: var(--text-tertiary);
}

.article-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.article-stats span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    background: var(--primary-color);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-medium);
}

.tag:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* ===================================
   ARTICLE LAYOUT
=================================== */

.article-main {
    background: var(--bg-primary);
    padding: var(--spacing-3xl) 0;
}

.article-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

/* ===================================
   SIDEBAR STYLES
=================================== */

.article-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.toc-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.toc-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.table-of-contents {
    list-style: none;
}

.table-of-contents ul {
    list-style: none;
    padding-left: var(--spacing-lg);
}

.table-of-contents a {
    display: block;
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    line-height: 1.4;
    transition: color var(--transition-fast);
    border-left: 2px solid transparent;
    padding-left: var(--spacing-sm);
}

.table-of-contents a:hover,
.table-of-contents a.active {
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.social-share-sidebar {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
}

.social-share-sidebar h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.share-buttons-vertical {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.share-btn-vertical {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--white);
    text-decoration: none;
    transition: all var(--transition-medium);
}

.share-btn-vertical:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.share-btn-vertical.twitter {
    background: #1DA1F2;
}

.share-btn-vertical.linkedin {
    background: #0077B5;
}

.share-btn-vertical.facebook {
    background: #4267B2;
}

.share-btn-vertical.reddit {
    background: #FF4500;
}

/* ===================================
   ARTICLE CONTENT
=================================== */

.article-body {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.article-image-container {
    margin-bottom: var(--spacing-2xl);
}

.featured-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 30px var(--shadow-light);
}

.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4,
.article-body h5,
.article-body h6 {
    font-family: var(--font-secondary);
    font-weight: 600;
    color: var(--text-primary);
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-lg);
    line-height: 1.3;
    scroll-margin-top: 100px;
}

.article-body h1 {
    font-size: 2.5rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: var(--spacing-md);
}

.article-body h2 {
    font-size: 2rem;
    position: relative;
}

.article-body h2::before {
    content: '';
    position: absolute;
    left: -var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 60%;
    background: var(--primary-color);
    border-radius: 2px;
}

.article-body h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.article-body h4 {
    font-size: 1.3rem;
}

.article-body h5 {
    font-size: 1.1rem;
}

.article-body h6 {
    font-size: 1rem;
    color: var(--text-secondary);
}

.article-body p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.article-body p:first-child {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-primary);
}

.article-body ul,
.article-body ol {
    margin: var(--spacing-lg) 0;
    padding-left: var(--spacing-xl);
}

.article-body li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
    color: var(--text-secondary);
}

.article-body a {
    color: var(--primary-color);
    text-decoration: underline;
    text-decoration-color: transparent;
    transition: all var(--transition-fast);
}

.article-body a:hover {
    text-decoration-color: var(--primary-color);
}

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

.article-body blockquote::before {
    content: '"';
    font-size: 4rem;
    color: var(--primary-color);
    position: absolute;
    top: -10px;
    left: var(--spacing-lg);
    font-family: Georgia, serif;
    opacity: 0.3;
}

.article-body code {
    background: var(--bg-tertiary);
    color: var(--primary-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.9em;
    border: 1px solid var(--border-color);
}

.article-body pre {
    background: var(--gray-900);
    color: var(--gray-100);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: var(--spacing-xl) 0;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px var(--shadow-light);
    position: relative;
}

.article-body pre code {
    background: none;
    color: inherit;
    padding: 0;
    border: none;
}

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    margin: var(--spacing-xl) 0;
    box-shadow: 0 8px 25px var(--shadow-light);
}

.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-xl) 0;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px var(--shadow-light);
}

.article-body th,
.article-body td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.article-body th {
    background: var(--primary-color);
    color: var(--white);
    font-weight: 600;
}

.article-body tr:hover {
    background: var(--bg-tertiary);
}

/* ===================================
   ARTICLE NAVIGATION
=================================== */

.article-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.nav-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.next-article {
    text-align: right;
}

.nav-label {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-medium);
}

.nav-link:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow-light);
}

.nav-title {
    font-weight: 500;
    line-height: 1.4;
}

/* ===================================
   AUTHOR BIO SECTION
=================================== */

.author-bio-section {
    background: var(--bg-secondary);
    padding: var(--spacing-3xl) 0;
}

.author-bio {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    background: var(--bg-primary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px var(--shadow-light);
}

.author-bio-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
}

.author-bio-name {
    font-family: var(--font-secondary);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.author-bio-title {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

.author-bio-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.author-bio-social {
    display: flex;
    gap: var(--spacing-md);
}

.author-social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 50%;
    text-decoration: none;
    transition: all var(--transition-medium);
    border: 1px solid var(--border-color);
}

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

/* ===================================
   RELATED ARTICLES
=================================== */

.related-articles-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-primary);
}

.related-articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.related-article-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-medium);
    text-decoration: none;
    color: inherit;
}

.related-article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px var(--shadow-medium);
}

.related-article-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.related-article-content {
    padding: var(--spacing-lg);
}

.related-article-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    line-height: 1.3;
}

.related-article-excerpt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.related-article-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

/* ===================================
   COMMENTS SECTION
=================================== */

.comments-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

.comments-container {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
}

.comments-widget {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

#utterances-container {
    min-height: 200px;
    position: relative;
}

.comments-error {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.comments-error i {
    font-size: 2rem;
    color: #f59e0b;
    margin-bottom: var(--spacing-md);
}

.comments-error h4 {
    color: var(--text-primary);
    margin: var(--spacing-md) 0;
}

.comments-alternative {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.comments-alternative h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.comments-alternative p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.social-discussion {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.discuss-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-medium);
    flex: 1;
    max-width: 200px;
    justify-content: center;
}

.discuss-btn:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.2);
}

/* ===================================
   NEWSLETTER CTA
=================================== */

.newsletter-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    padding: var(--spacing-3xl) 0;
}

.newsletter-cta h2 {
    font-family: var(--font-secondary);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.newsletter-cta p {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
}

/* ===================================
   HEADER ACTIONS
=================================== */

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.share-btn,
.bookmark-btn {
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-medium);
    border: 1px solid var(--border-color);
}

.share-btn:hover,
.bookmark-btn:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: scale(1.1);
}

.bookmark-btn.bookmarked {
    background: var(--warning-color);
    color: var(--white);
}

/* ===================================
   RESPONSIVE DESIGN
=================================== */

/* Large tablets and small desktops */
@media (max-width: 1200px) {
    .article-container {
        grid-template-columns: 200px 1fr;
        gap: var(--spacing-2xl);
    }
    
    .article-header-title {
        font-size: 3rem;
    }
}

/* Tablets */
@media (max-width: 1024px) {
    .article-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        padding: 0 var(--spacing-lg);
    }
    
    .article-sidebar {
        position: static;
        order: 2;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
        margin-top: var(--spacing-2xl);
    }
    
    .article-header-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .article-stats {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    .article-header-title {
        font-size: 2.8rem;
    }
    
    .featured-image {
        height: 350px;
    }
    
    .article-body h2::before {
        left: 0;
        position: relative;
        display: inline-block;
        margin-right: var(--spacing-sm);
    }
}

/* Mobile landscape and small tablets */
@media (max-width: 768px) {
    .article-header {
        padding: 5rem var(--spacing-md) 2rem;
    }
    
    .article-header-title {
        font-size: 2.5rem;
        line-height: 1.1;
    }
    
    .article-sidebar {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .author-bio {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }
    
    .article-navigation {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .next-article {
        text-align: left;
    }
    
    .nav-link {
        justify-content: flex-start;
    }
    
    .related-articles-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .social-discussion {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }
    
    .discuss-btn {
        max-width: 100%;
        width: 100%;
    }
    
    .comments-container {
        padding: var(--spacing-xl);
    }
    
    .nav-actions {
        display: none;
    }
    
    .featured-image {
        height: 280px;
    }
    
    .article-body {
        padding: 0;
    }
    
    .toc-container,
    .social-share-sidebar {
        padding: var(--spacing-lg);
    }
    
    .article-body h1 {
        font-size: 2rem;
    }
    
    .article-body h2 {
        font-size: 1.6rem;
    }
    
    .article-body h3 {
        font-size: 1.3rem;
    }
    
    .article-body p {
        font-size: 1rem;
    }
    
    .breadcrumb {
        font-size: 0.8rem;
    }
}

/* Mobile portrait */
@media (max-width: 480px) {
    .article-header {
        padding: 4rem var(--spacing-md) 1.5rem;
    }
    
    .article-header-title {
        font-size: 2rem;
        line-height: 1.1;
    }
    
    .featured-image {
        height: 220px;
    }
    
    .article-body h2::before {
        display: none;
    }
    
    .author-bio {
        padding: var(--spacing-lg);
    }
    
    .author-bio-avatar {
        width: 80px;
        height: 80px;
    }
    
    .author-bio-name {
        font-size: 1.4rem;
    }
    
    .toc-container,
    .social-share-sidebar {
        padding: var(--spacing-md);
    }
    
    .newsletter-cta h2 {
        font-size: 2rem;
    }
    
    .newsletter-cta p {
        font-size: 1rem;
    }
    
    .article-body h1 {
        font-size: 1.8rem;
    }
    
    .article-body h2 {
        font-size: 1.4rem;
    }
    
    .article-body h3 {
        font-size: 1.2rem;
    }
    
    .article-stats {
        font-size: 0.8rem;
        gap: var(--spacing-sm);
    }
    
    .article-tags {
        gap: var(--spacing-xs);
    }
    
    .tag {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.75rem;
    }
    
    .article-body pre {
        padding: var(--spacing-md);
        font-size: 0.9rem;
        overflow-x: auto;
    }
    
    .comments-container {
        padding: var(--spacing-lg);
    }
    
    .comments-alternative h3 {
        font-size: 1.1rem;
    }
    
    .discuss-btn {
        font-size: 0.9rem;
        padding: var(--spacing-md);
    }
    
    .article-body table {
        font-size: 0.9rem;
    }
    
    .article-body th,
    .article-body td {
        padding: var(--spacing-sm);
    }
}

/* Very small screens */
@media (max-width: 360px) {
    .article-header-title {
        font-size: 1.8rem;
    }
    
    .article-body h1 {
        font-size: 1.6rem;
    }
    
    .article-body h2 {
        font-size: 1.3rem;
    }
    
    .article-body p {
        font-size: 0.95rem;
    }
    
    .author-bio-avatar {
        width: 60px;
        height: 60px;
    }
    
    .related-article-title {
        font-size: 1.1rem;
    }
    
    .newsletter-cta {
        padding: var(--spacing-2xl) 0;
    }
}