/* ========================
   Blog System Styles
======================== */

/* Blog Layout */
.blog-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.blog-header {
    text-align: center;
    padding: var(--spacing-3xl) 0 var(--spacing-2xl);
}

.blog-header h1 {
    margin-bottom: var(--spacing-md);
}

.blog-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Blog Filters */
.blog-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background: var(--surface);
    border-radius: var(--radius-lg);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex: 1;
    min-width: 200px;
}

.filter-group label {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.filter-group select,
.filter-group input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--background);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 0.875rem;
}

.filter-group select:focus,
.filter-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.1);
}

/* Search Input */
.search-wrapper {
    position: relative;
    flex: 2;
    min-width: 300px;
}

.search-wrapper input {
    width: 100%;
    padding-left: 40px;
}

.search-wrapper i {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

/* Active Filters */
.active-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.filter-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

.filter-tag button {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.filter-tag button:hover {
    opacity: 0.8;
}

/* Clear Filters */
.clear-filters {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.clear-filters:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Featured Articles */
.featured-articles {
    margin-bottom: var(--spacing-3xl);
}

.featured-articles h2 {
    margin-bottom: var(--spacing-xl);
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
}

/* Article Cards */
.article-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--shadow-color);
}

.article-card.featured {
    border: 2px solid var(--primary-color);
}

.article-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--gradient-mesh);
}

.article-image.placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--primary-color);
    background: var(--surface-hover);
}

.article-content {
    padding: var(--spacing-xl);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-muted);
}

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

.article-meta i {
    color: var(--primary-color);
}

.article-category {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--gradient-secondary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.article-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.article-card h3 a {
    color: inherit;
    text-decoration: none;
}

.article-card h3 a:hover {
    color: var(--primary-color);
}

.article-excerpt {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.article-tags .tag {
    font-size: 0.6875rem;
    padding: 2px 8px;
    background: var(--surface-hover);
    color: var(--text-muted);
    border-radius: var(--radius-sm);
}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: none;
    transition: gap var(--transition-fast);
}

.read-more:hover {
    gap: var(--spacing-sm);
}

/* Articles Grid */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

/* Results Info */
.results-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
}

.results-count {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.sort-options {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.sort-options label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.sort-options select {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--background);
    color: var(--text-primary);
    font-size: 0.875rem;
}

/* No Results */
.no-results {
    text-align: center;
    padding: var(--spacing-3xl);
    background: var(--surface);
    border-radius: var(--radius-lg);
}

.no-results i {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

.no-results h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.no-results p {
    color: var(--text-secondary);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-3xl);
}

.pagination-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--surface);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-btn.active {
    background: var(--gradient-secondary);
    border-color: transparent;
    color: white;
}

.pagination-ellipsis {
    color: var(--text-muted);
}

/* RSS Link */
.rss-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: #f26522;
    color: white;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.875rem;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.rss-link:hover {
    background: #e55a1c;
    transform: translateY(-2px);
    color: white;
}

/* Blog Sidebar */
.blog-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-2xl);
}

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

.sidebar-widget {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.sidebar-widget h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

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

.category-list li {
    margin-bottom: var(--spacing-sm);
}

.category-list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
    transition: color var(--transition-fast);
}

.category-list a:hover {
    color: var(--primary-color);
}

.category-count {
    background: var(--surface-hover);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag-cloud .tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--surface-hover);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.tag-cloud .tag:hover {
    background: var(--primary-color);
    color: white;
}

/* Article Single Page Styles */
.article-single {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.article-single-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.article-single-header h1 {
    margin-bottom: var(--spacing-lg);
}

.article-single-meta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    color: var(--text-muted);
    font-size: 0.9375rem;
}

.article-single-content {
    font-size: 1.0625rem;
    line-height: 1.8;
}

.article-single-content h2,
.article-single-content h3,
.article-single-content h4 {
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
}

.article-single-content p {
    margin-bottom: var(--spacing-lg);
}

.article-single-content pre {
    background: var(--surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: var(--spacing-xl) 0;
}

.article-single-content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

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

/* Comments Section */
.comments-section {
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--border-color);
}

.comments-section h3 {
    margin-bottom: var(--spacing-xl);
}

#disqus_thread {
    background: var(--surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
}

/* Reading Progress Bar */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--gradient-secondary);
    z-index: 1001;
    transition: width 0.1s ease;
}

/* Share Buttons */
.share-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin: var(--spacing-2xl) 0;
    padding: var(--spacing-lg);
    background: var(--surface);
    border-radius: var(--radius-lg);
    justify-content: center;
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    color: white;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.share-btn:hover {
    transform: translateY(-3px);
    color: white;
}

.share-btn.twitter { background: #1da1f2; }
.share-btn.linkedin { background: #0077b5; }
.share-btn.facebook { background: #1877f2; }
.share-btn.email { background: var(--primary-color); }
.share-btn.copy { background: var(--text-muted); }

/* Loading State */
.loading-articles {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.article-skeleton {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    animation: pulse 1.5s ease-in-out infinite;
}

.skeleton-image {
    height: 200px;
    background: var(--surface-hover);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.skeleton-text {
    height: 1rem;
    background: var(--surface-hover);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.skeleton-text.short { width: 60%; }
.skeleton-text.medium { width: 80%; }
.skeleton-text.long { width: 100%; }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Responsive */
@media (max-width: 1024px) {
    .blog-layout {
        grid-template-columns: 1fr;
    }
    
    .blog-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .blog-filters {
        flex-direction: column;
    }
    
    .filter-group,
    .search-wrapper {
        min-width: 100%;
    }
    
    .featured-grid,
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .article-image {
        height: 180px;
    }
    
    .results-info {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}