/* ===================================
   Blog Post Page Styles
   =================================== */

/* Reading Progress Bar */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-border);
    z-index: 9999;
}

.reading-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    width: 0%;
    transition: width 0.1s ease;
}

/* Article Main Container */
.article-main {
    background: var(--color-bg);
    padding-top: var(--space-lg);
}

.article-container {
    max-width: 1280px;
    margin: 0 auto;
}

.container-narrow {
    max-width: 920px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Article Header */
.article-header {
    margin-bottom: var(--space-2xl);
}

.article-header-content {
    max-width: 800px;
    margin: 0 auto var(--space-lg);
    padding: 0 var(--space-md);
    text-align: center;
}

.article-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin: var(--space-md) 0 var(--space-lg);
    color: var(--color-text-primary);
}

.article-meta {
    display: flex;
    justify-content: center;
    margin-top: var(--space-lg);
}

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

.author-avatar-article {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
}

.author-details {
    text-align: left;
}

.author-name-link {
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.author-name-link:hover {
    color: var(--color-accent-primary);
}

.article-meta-details {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.article-featured-image {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border-radius: 16px;
}

.article-featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Article Layout */
.article-layout {
    display: grid;
    gap: var(--space-xl);
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Article Content */
.article-content {
    width: 100%;
    max-width: 720px;
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-primary);
}

.article-content > * + * {
    margin-top: 1.5rem;
}

/* Typography */
.article-content h2 {
    font-family: var(--font-ui);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.3;
    margin-top: 3rem;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
    scroll-margin-top: 100px;
}

.article-content h3 {
    font-family: var(--font-ui);
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.4;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--color-text-primary);
    scroll-margin-top: 100px;
}

.article-content h4 {
    font-family: var(--font-ui);
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.5;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-primary);
}

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

.article-content a {
    color: var(--color-accent-primary);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: color var(--transition-fast);
}

.article-content a:hover {
    color: var(--color-accent-secondary);
}

/* Images */
.article-content img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin: var(--space-xl) 0;
}

.article-content figcaption {
    text-align: center;
    font-size: 0.875rem;
    font-style: italic;
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
}

/* Blockquotes */
.article-content blockquote {
    border-left: 4px solid var(--color-accent-primary);
    background: var(--color-surface);
    padding: var(--space-lg) var(--space-xl);
    margin: var(--space-xl) 0;
    font-size: 1.25rem;
    font-style: italic;
    color: var(--color-text-secondary);
    border-radius: 0 8px 8px 0;
}

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

.article-content blockquote cite {
    display: block;
    margin-top: var(--space-md);
    font-size: 0.9rem;
    font-style: normal;
    color: var(--color-text-muted);
}

.article-content blockquote cite::before {
    content: '— ';
}

/* Code Blocks */
.article-content pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: var(--space-lg);
    border-radius: 8px;
    overflow-x: auto;
    margin: var(--space-xl) 0;
    font-size: 0.9rem;
    line-height: 1.6;
}

.article-content code {
    font-family: 'Courier New', monospace;
}

.article-content :not(pre) > code {
    background: var(--color-surface);
    color: var(--color-accent-secondary);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
}

/* Lists */
.article-content ul,
.article-content ol {
    padding-left: 1.5rem;
    margin: var(--space-lg) 0;
}

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

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

/* Horizontal Rule */
.article-content hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--space-2xl) 0;
}

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

.article-content th,
.article-content td {
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    text-align: left;
}

.article-content th {
    background: var(--color-surface);
    font-weight: 600;
}

/* Sidebar */
.article-sidebar {
    display: none;
}

.sidebar-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    position: sticky;
    top: 100px;
}

.sidebar-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

/* Author Card Sidebar */
.author-card-sidebar {
    text-align: center;
}

.author-avatar-sidebar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: var(--space-md);
}

.author-name-sidebar {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.author-bio-sidebar {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.btn-small {
    padding: var(--space-sm) var(--space-lg);
    font-size: 0.875rem;
}

/* Share Buttons */
.share-buttons-vertical {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.share-btn {
    width: 100%;
    padding: var(--space-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.share-twitter:hover {
    background: #1DA1F2;
    border-color: #1DA1F2;
    color: white;
}

.share-facebook:hover {
    background: #1877F2;
    border-color: #1877F2;
    color: white;
}

.share-linkedin:hover {
    background: #0A66C2;
    border-color: #0A66C2;
    color: white;
}

.share-copy:hover {
    background: var(--color-success);
    border-color: var(--color-success);
    color: white;
}

/* Table of Contents */
.toc-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.toc-link {
    display: block;
    padding: var(--space-sm);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.toc-link:hover {
    background: var(--color-hover);
    color: var(--color-text-primary);
}

.toc-link.active {
    background: var(--color-accent-primary);
    color: white;
}

.toc-link.toc-h3 {
    padding-left: var(--space-lg);
    font-size: 0.8125rem;
}

/* Desktop Layout */
@media (min-width: 1024px) {
    .article-title {
        font-size: 3.5rem;
    }
    
    .article-layout {
        grid-template-columns: minmax(600px, 800px) 300px;
        gap: var(--space-2xl);
        max-width: 1400px;
        justify-content: center;
    }
    
    .article-content {
        max-width: 100%;
    }
    
    .article-sidebar {
        display: block;
    }
}

/* Extra wide screens */
@media (min-width: 1440px) {
    .article-layout {
        grid-template-columns: minmax(700px, 900px) 320px;
        gap: var(--space-3xl);
    }
}

/* Article Footer */
.article-footer {
    max-width: 720px;
    margin: var(--space-3xl) auto;
    padding: var(--space-2xl) var(--space-md);
    border-top: 1px solid var(--color-border);
}

.article-tags {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

.article-tags i {
    color: var(--color-text-muted);
}

.tag-pill {
    padding: var(--space-xs) var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.tag-pill:hover {
    background: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
    color: white;
}

.share-buttons-horizontal {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.share-label {
    font-weight: 500;
    color: var(--color-text-secondary);
}

.share-btn-horizontal {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-btn-horizontal:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.share-btn-horizontal.share-twitter:hover {
    background: #1DA1F2;
    border-color: #1DA1F2;
    color: white;
}

.share-btn-horizontal.share-facebook:hover {
    background: #1877F2;
    border-color: #1877F2;
    color: white;
}

.share-btn-horizontal.share-linkedin:hover {
    background: #0A66C2;
    border-color: #0A66C2;
    color: white;
}

.share-btn-horizontal.share-copy:hover {
    background: var(--color-success);
    border-color: var(--color-success);
    color: white;
}


/* Author Bio Section */
.author-bio-section {
    background: var(--color-surface);
    padding: var(--space-3xl) 0;
}

.author-bio-card {
    display: flex;
    gap: var(--space-xl);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: var(--space-2xl);
    align-items: center;
}

.author-bio-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.author-bio-content {
    flex: 1;
}

.author-bio-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.author-bio-name a {
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.author-bio-name a:hover {
    color: var(--color-accent-primary);
}

.author-bio-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.author-bio-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.author-social-links {
    display: flex;
    gap: var(--space-sm);
}

.author-social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

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

@media (max-width: 768px) {
    .author-bio-card {
        flex-direction: column;
        text-align: center;
    }
    
    .author-bio-footer {
        flex-direction: column;
    }
}

/* Comments Section */
.comments-section {
    padding: var(--space-3xl) 0;
}

.comments-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-2xl);
}

.comment-form-container {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.comment-form-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.form-row {
    display: grid;
    gap: var(--space-md);
    grid-template-columns: 1fr 1fr;
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-ui);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-hint {
    display: block;
    margin-top: var(--space-xs);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Comments List */
.comments-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.comment {
    display: flex;
    gap: var(--space-md);
}

.comment-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.comment-content {
    flex: 1;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
}

.comment-author {
    font-weight: 600;
    color: var(--color-text-primary);
}

.comment-time {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.comment-text {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.comment-reply-btn {
    background: none;
    border: none;
    color: var(--color-accent-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    transition: color var(--transition-fast);
}

.comment-reply-btn:hover {
    color: var(--color-accent-secondary);
}

.comments-empty {
    text-align: center;
    padding: var(--space-3xl) var(--space-md);
    color: var(--color-text-muted);
}

.comments-empty i {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.comments-empty p {
    font-size: 1.125rem;
}

/* Related Posts Section */
.related-posts-section {
    background: var(--color-surface);
    padding: var(--space-3xl) 0;
}

.related-posts-section .section-title {
    text-align: center;
    margin-bottom: var(--space-2xl);
}