/* ===================================
   BLOG PAGES - Additional Styles
   =================================== */

/* Blog Header */
.blog-header {
    padding: calc(var(--space-xl) + 60px) 3rem var(--space-lg);
    text-align: center;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-elevated) 100%);
    border-bottom: 1px solid var(--color-border);
}

.blog-page-title {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.blog-page-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 500px;
    margin: 0 auto;
}

/* Blog Main */
.blog-main {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-lg) 3rem var(--space-xl);
}

/* Blog Filters */
.blog-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.filter-btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: 2px;
    font-family: var(--font-body);
}

.filter-btn:hover {
    border-color: var(--color-text-muted);
    color: var(--color-text);
}

.filter-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg);
}

/* Blog Posts List */
.blog-posts-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.blog-post-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    transition: all var(--transition-medium);
}

.blog-post-item:hover {
    border-color: var(--color-accent);
    transform: translateX(8px);
}

.post-date-sidebar {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm);
    background: var(--color-bg);
    border-radius: 4px;
    text-align: center;
}

.post-day {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
}

.post-month {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.post-year {
    font-size: 0.625rem;
    color: var(--color-text-muted);
}

.post-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.post-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
}

.post-read-time {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.post-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.75rem;
}

.post-title a {
    transition: color var(--transition-fast);
}

.post-title a:hover {
    color: var(--color-accent);
}

.post-excerpt {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: var(--space-sm);
}

.post-read-more {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-accent);
    transition: all var(--transition-fast);
}

.post-read-more:hover {
    color: var(--color-accent-light);
}

/* ===================================
   SINGLE BLOG POST STYLES
   =================================== */

/* Article Header */
.article-header {
    padding: calc(var(--space-xl) + 60px) 3rem var(--space-lg);
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.article-header .post-category {
    display: inline-block;
    margin-bottom: var(--space-sm);
}

.article-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    max-width: 900px;
    margin: 0 auto var(--space-md);
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

.article-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Article Content */
.article-content {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-lg) 3rem var(--space-xl);
}

.article-content h2 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    margin: var(--space-lg) 0 var(--space-sm);
    color: var(--color-text);
}

.article-content h3 {
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 600;
    margin: var(--space-md) 0 var(--space-sm);
    color: var(--color-text);
}

.article-content p {
    margin-bottom: var(--space-sm);
    color: var(--color-text);
    font-size: 1.0625rem;
    line-height: 1.8;
}

.article-content a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

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

.article-content ul,
.article-content ol {
    margin-bottom: var(--space-sm);
    padding-left: 1.5rem;
    color: var(--color-text);
}

.article-content li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
}

.article-content blockquote {
    margin: var(--space-md) 0;
    padding: var(--space-md);
    background: var(--color-bg-card);
    border-left: 3px solid var(--color-accent);
    font-style: italic;
    color: var(--color-text-muted);
}

.article-content blockquote p {
    margin-bottom: 0;
    color: inherit;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: var(--space-md) 0;
}

.article-content figure {
    margin: var(--space-md) 0;
}

.article-content figcaption {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: 0.5rem;
}

/* Code Blocks */
.article-content code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.875em;
    background: var(--color-bg-card);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    color: var(--color-accent-light);
}

.article-content pre {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: var(--space-md);
    overflow-x: auto;
    margin: var(--space-md) 0;
}

.article-content pre code {
    background: none;
    padding: 0;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--color-text);
}

/* Math (if using KaTeX or MathJax) */
.article-content .math-block {
    overflow-x: auto;
    padding: var(--space-sm) 0;
}

/* Article Footer */
.article-footer {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 3rem var(--space-lg);
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.article-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.4rem 0.8rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 2px;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.article-tag:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Author Box */
.author-box {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-card);
    border-radius: 4px;
    margin-bottom: var(--space-lg);
}

.author-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 0.625rem;
    flex-shrink: 0;
}

.author-info h4 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.author-info p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* Navigation between posts */
.post-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.post-nav-link {
    padding: var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.post-nav-link:hover {
    border-color: var(--color-accent);
}

.post-nav-link.next {
    text-align: right;
}

.post-nav-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.post-nav-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

.post-nav-link:hover .post-nav-title {
    color: var(--color-accent);
}

/* Table of Contents (optional sidebar) */
.toc-sidebar {
    position: sticky;
    top: 100px;
    padding: var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

.toc-title {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
    color: var(--color-accent);
}

.toc-list {
    list-style: none;
}

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

.toc-list a {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.toc-list a:hover,
.toc-list a.active {
    color: var(--color-accent);
}

/* Responsive */
@media (max-width: 900px) {
    .blog-header {
        padding: calc(var(--space-lg) + 60px) 1.5rem var(--space-md);
    }
    
    .blog-page-title {
        font-size: 3rem;
    }
    
    .blog-main {
        padding: var(--space-md) 1.5rem var(--space-lg);
    }
    
    .blog-post-item {
        grid-template-columns: 1fr;
    }
    
    .post-date-sidebar {
        flex-direction: row;
        gap: 0.5rem;
        justify-content: flex-start;
        padding: 0.5rem 0;
        background: none;
    }
    
    .post-day {
        font-size: 1rem;
    }
    
    .post-title {
        font-size: 1.25rem;
    }
    
    .article-header {
        padding: calc(var(--space-lg) + 60px) 1.5rem var(--space-md);
    }
    
    .article-content {
        padding: var(--space-md) 1.5rem var(--space-lg);
    }
    
    .article-footer {
        padding: 0 1.5rem var(--space-md);
    }
    
    .post-navigation {
        grid-template-columns: 1fr;
    }
    
    .post-nav-link.next {
        text-align: left;
    }
}