/* Modern News Detail Styles */
.news-detail-container {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    min-height: 100vh;
}

/* Reading Progress Bar */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--reading-progress, 0%);
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    z-index: 1000;
    transition: width 0.1s ease;
}

/* Breadcrumb Section */
.breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
    font-size: var(--text-sm);
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    color: var(--text-muted);
    font-weight: 600;
}

.breadcrumb-item a {
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    transition: color var(--transition-fast);
}

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

.breadcrumb-item.active {
    color: var(--text-secondary);
}

/* News Hero Section */
.news-detail-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 50%, var(--accent-color) 100%);
    color: white;
    padding: 3rem 0;
    position: relative;
    overflow: hidden;
}

.news-detail-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 20"><defs><pattern id="news-detail-grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="20" fill="url(%23news-detail-grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-size: clamp(1.75rem, 4vw, 3rem);
    font-weight: 800;
    line-height: var(--leading-tight);
    margin-bottom: 2rem;
    background: linear-gradient(45deg, rgba(255,255,255,1), rgba(255,255,255,0.8));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-meta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}

.hero-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: var(--text-sm);
    font-weight: 500;
}

.hero-meta-item i {
    font-size: 1.125rem;
}

/* Hero Image Overlap */
.hero-image-overlap {
    margin-top: -3rem;
    margin-bottom: 3rem;
    position: relative;
    z-index: 3;
}

.hero-image-container {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.hero-image-container:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.hero-image-container img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.hero-image-container:hover img {
    transform: scale(1.05);
}

/* Article Container */
.article-container {
    padding-bottom: 4rem;
}

/* Sidebar Styles */
.article-sidebar {
    position: sticky;
    top: 2rem;
    height: fit-content;
}

.sidebar-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    margin-bottom: 2rem;
    transition: all var(--transition-normal);
}

.sidebar-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(37, 99, 235, 0.2);
}

.sidebar-card-title,
.toc-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-card-title i,
.toc-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

/* Table of Contents */
.toc-container {
    max-height: 400px;
    overflow-y: auto;
}

.toc-container nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-container nav li {
    margin-bottom: 0.5rem;
}

.toc-container nav a {
    display: block;
    padding: 0.5rem 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    line-height: var(--leading-tight);
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.toc-container nav a:hover {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
    border-left-color: var(--primary-color);
    transform: translateX(4px);
}

.toc-container nav a.active {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
    border-left-color: var(--primary-color);
    font-weight: 600;
}

/* Stat Items */
.stat-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-light);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.stat-item:last-child {
    border-bottom: none;
}

.stat-item i {
    color: var(--primary-color);
    font-size: 1rem;
    width: 1rem;
    text-align: center;
}

/* Author Card */
.author-avatar {
    width: 4rem;
    height: 4rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-md);
}

.author-name {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.author-role {
    color: var(--primary-color);
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.author-bio {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

/* Article Main */
.article-main {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    margin-bottom: 3rem;
}

.mobile-image {
    margin-bottom: 2rem;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.mobile-image img {
    transition: transform var(--transition-normal);
}

.mobile-image:hover img {
    transform: scale(1.02);
}

/* Article Header */
.article-header {
    padding: 2rem 2.5rem 0;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 2.5rem;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-bottom: 2rem;
}

.meta-avatar {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    box-shadow: var(--shadow-md);
}

.meta-info {
    flex: 1;
}

.meta-author {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.meta-details {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    font-size: var(--text-sm);
    flex-wrap: wrap;
}

.meta-details i {
    font-size: 1rem;
}

/* Article Content */
.article-content {
    padding: 0 2.5rem 2.5rem;
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--text-primary);
}

.article-content h1, .article-content h2, .article-content h3,
.article-content h4, .article-content h5, .article-content h6 {
    color: var(--text-primary);
    margin-top: 2.5rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    line-height: var(--leading-tight);
}

.article-content h1 { font-size: var(--text-3xl); }
.article-content h2 { font-size: var(--text-2xl); }
.article-content h3 { font-size: var(--text-xl); }
.article-content h4 { font-size: var(--text-lg); }

.article-content p {
    margin-bottom: 1.5rem;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin: 2rem 0;
    transition: all var(--transition-normal);
}

.article-content img:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-xl);
}

.article-content blockquote {
    border-left: 4px solid var(--primary-color);
    background: var(--bg-secondary);
    padding: 1.5rem 2rem;
    margin: 2rem 0;
    border-radius: var(--radius-lg);
    font-style: italic;
    position: relative;
}

.article-content blockquote::before {
    content: '"';
    position: absolute;
    top: -0.5rem;
    left: 1rem;
    font-size: 3rem;
    color: var(--primary-color);
    opacity: 0.3;
}

.article-content code {
    background: var(--bg-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.875em;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.article-content pre {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: 2rem 0;
    border: 1px solid var(--border-light);
}

.article-content ul, .article-content ol {
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.article-content li {
    margin-bottom: 0.5rem;
}

/* Article Footer */
.article-footer {
    padding: 2rem 2.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
}

.article-tags {
    margin-bottom: 2rem;
}

.tag-item {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: 500;
    margin-right: 0.75rem;
    margin-bottom: 0.75rem;
    transition: all var(--transition-fast);
}

.tag-item:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
    transform: translateY(-2px);
}

.tag-item i {
    font-size: 0.875rem;
}

/* Social Share */
.social-share {
    text-align: center;
}

.social-share-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.social-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-xl);
    background: var(--bg-primary);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.social-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.social-btn.twitter:hover {
    color: #1da1f2;
    border-color: #1da1f2;
    background: rgba(29, 161, 242, 0.05);
}

.social-btn.facebook:hover {
    color: #4267b2;
    border-color: #4267b2;
    background: rgba(66, 103, 178, 0.05);
}

.social-btn.linkedin:hover {
    color: #0077b5;
    border-color: #0077b5;
    background: rgba(0, 119, 181, 0.05);
}

.social-btn.copy-link:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.social-btn.copied {
    color: var(--success-color);
    border-color: var(--success-color);
    background: rgba(5, 150, 105, 0.05);
}

/* Article Navigation */
.article-navigation {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    margin-bottom: 4rem;
}

.news-nav-item {
    display: block;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    text-decoration: none;
    transition: all var(--transition-normal);
    height: 100%;
}

.news-nav-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(37, 99, 235, 0.2);
}

.nav-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.nav-title {
    color: var(--text-primary);
    font-size: var(--text-lg);
    font-weight: 700;
    line-height: var(--leading-tight);
}

.news-nav-item:hover .nav-title {
    color: var(--primary-color);
}

/* Related Section */
.related-section {
    padding: 4rem 0;
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: var(--text-3xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: var(--text-lg);
    max-width: 600px;
    margin: 0 auto;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.related-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.related-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(37, 99, 235, 0.2);
}

.related-card-image {
    height: 180px;
    overflow: hidden;
}

.related-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

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

.related-card-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.related-card-category {
    color: var(--primary-color);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.related-card-title {
    font-size: var(--text-lg);
    font-weight: 700;
    line-height: var(--leading-tight);
    margin-bottom: 1rem;
}

.related-card-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.related-card-excerpt {
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: auto;
    font-size: var(--text-sm);
}

.related-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.related-card-date {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--text-muted);
    font-size: var(--text-xs);
}

/* Newsletter Section */
.newsletter-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.newsletter-section::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 20"><defs><pattern id="newsletter-detail-grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="20" fill="url(%23newsletter-detail-grid)"/></svg>');
    opacity: 0.3;
}

.newsletter-container {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-2xl);
    padding: 3rem 2rem;
    text-align: center;
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 2;
    max-width: 600px;
    margin: 0 auto;
}

.newsletter-title {
    color: white;
    font-weight: 800;
    margin-bottom: 1rem;
    font-size: var(--text-2xl);
}

.newsletter-description {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    font-size: var(--text-lg);
    line-height: var(--leading-relaxed);
}

.newsletter-form {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.newsletter-input {
    flex: 1;
    min-width: 250px;
    padding: 1rem 1.5rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: var(--text-base);
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.newsletter-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.newsletter-input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.15);
}

.newsletter-disclaimer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--text-sm);
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top-btn {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-fast);
}

.back-to-top-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* Responsive Design */
@media (max-width: 768px) {
    .news-detail-hero {
        padding: 2rem 0;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-meta {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-image-container {
        margin-top: -2rem;
    }
    
    .hero-image-container img {
        height: 250px;
    }
    
    .article-sidebar {
        position: static;
        margin-bottom: 2rem;
    }
    
    .article-header,
    .article-content {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
    
    .article-footer {
        padding: 1.5rem;
    }
    
    .article-navigation {
        padding: 1.5rem;
    }
    
    .meta-details {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .social-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .social-btn {
        justify-content: center;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-input {
        min-width: auto;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
    
    .related-card-footer {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
    }
    
    .back-to-top-btn {
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1rem;
    }
}

@media (max-width: 576px) {
    .hero-meta-item {
        font-size: var(--text-xs);
        padding: 0.5rem 1rem;
    }
    
    .article-header,
    .article-content,
    .article-footer {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .newsletter-container {
        padding: 2rem 1.5rem;
    }
    
    .newsletter-title {
        font-size: var(--text-xl);
    }
    
    .newsletter-description {
        font-size: var(--text-base);
    }
}

/* Dark theme support */
.dark-theme .article-main,
.dark-theme .sidebar-card,
.dark-theme .article-navigation,
.dark-theme .related-card {
    background: var(--bg-secondary);
    border-color: var(--border-dark);
}

.dark-theme .article-header,
.dark-theme .article-footer {
    background: var(--bg-tertiary);
    border-color: var(--border-dark);
}

.dark-theme .tag-item,
.dark-theme .social-btn,
.dark-theme .news-nav-item {
    background: var(--bg-tertiary);
    border-color: var(--border-dark);
}

/* Animation classes */
.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.loading-spinner {
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* High contrast support */
@media (prefers-contrast: high) {
    .article-main,
    .sidebar-card,
    .article-navigation,
    .related-card {
        border-width: 2px;
    }
    
    .tag-item,
    .social-btn {
        border-width: 2px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .article-main,
    .sidebar-card,
    .related-card,
    .news-nav-item,
    .tag-item,
    .social-btn {
        transition: none;
    }
    
    .article-main:hover,
    .sidebar-card:hover,
    .related-card:hover {
        transform: none;
    }
    
    .hero-image-container:hover img,
    .related-card:hover .related-card-image img {
        transform: none;
    }
}