/* Blog Styles */

/* Blog Header */
.blog-header {
    padding: 120px 0 60px;
    text-align: center;
    background: linear-gradient(180deg, rgba(0, 122, 255, 0.05) 0%, transparent 100%);
}

.blog-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Categories */
.categories-section {
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
}

.categories-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.category-chip {
    padding: 0.5rem 1rem;
    border-radius: 100px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.category-chip:hover {
    border-color: var(--cat-color, var(--primary-color));
    color: var(--cat-color, var(--primary-color));
}

.category-chip.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

/* Blog Main */
.blog-main {
    padding: 3rem 0 5rem;
    min-height: 50vh;
}

/* Posts Grid */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
}

/* Post Card */
.post-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.post-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 122, 255, 0.1);
}

.post-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.post-image {
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--bg-secondary);
}

.post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.post-content {
    padding: 1.5rem;
}

.post-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.post-category {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--cat-color, var(--primary-color));
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.post-title {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-excerpt {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

.post-author {
    font-weight: 500;
    color: var(--text-secondary);
}

.post-date::before {
    content: '•';
    margin-right: 1rem;
}

/* Loading State */
.loading-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    margin: 0 auto 1rem;
    animation: spin 1s linear infinite;
}

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

/* Empty State */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
    background: var(--card-bg);
    border: 1px dashed var(--border-color);
    border-radius: 16px;
}

/* ==================== */
/* Blog Detail Page     */
/* ==================== */

.post-detail-header {
    padding: 120px 0 40px;
    text-align: center;
}

.post-detail-categories {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.post-detail-category {
    padding: 0.375rem 0.875rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: rgba(var(--cat-color-rgb, 0, 122, 255), 0.1);
    color: var(--cat-color, var(--primary-color));
    text-decoration: none;
}

.post-detail-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.post-detail-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.post-detail-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.post-detail-author-image {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.post-detail-author-name {
    font-weight: 500;
    color: var(--text-primary);
}

.post-detail-date,
.post-detail-readtime {
    color: var(--text-tertiary);
}

/* Featured Image */
.post-featured-image {
    max-width: 900px;
    margin: 2rem auto 3rem;
    border-radius: 16px;
    overflow: hidden;
}

.post-featured-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Post Body */
.post-body {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 1.5rem 4rem;
}

.post-body h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin: 2.5rem 0 1rem;
    color: var(--text-primary);
}

.post-body h3 {
    font-size: 1.375rem;
    font-weight: 600;
    margin: 2rem 0 0.75rem;
    color: var(--text-primary);
}

.post-body h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 1.5rem 0 0.5rem;
    color: var(--text-primary);
}

.post-body p {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.post-body a {
    color: var(--primary-color);
    text-decoration: underline;
    text-decoration-color: rgba(0, 122, 255, 0.3);
    text-underline-offset: 2px;
    transition: text-decoration-color 0.2s;
}

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

.post-body strong {
    font-weight: 600;
    color: var(--text-primary);
}

.post-body em {
    font-style: italic;
}

.post-body ul,
.post-body ol {
    margin: 1.5rem 0;
    padding-left: 1.5rem;
}

.post-body li {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.post-body blockquote {
    margin: 2rem 0;
    padding: 1.5rem 2rem;
    border-left: 4px solid var(--primary-color);
    background: var(--card-bg);
    border-radius: 0 12px 12px 0;
    font-style: italic;
    color: var(--text-secondary);
}

.post-body blockquote p {
    margin-bottom: 0;
}

.post-body pre {
    margin: 2rem 0;
    padding: 1.5rem;
    background: #1a1a1a;
    border-radius: 12px;
    overflow-x: auto;
}

.post-body code {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.9rem;
}

.post-body p code {
    background: var(--card-bg);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.9em;
}

.post-body figure {
    margin: 2rem 0;
}

.post-body figure img {
    width: 100%;
    border-radius: 12px;
}

.post-body figcaption {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-top: 0.75rem;
}

/* Author Box */
.author-box {
    display: flex;
    gap: 1.5rem;
    padding: 2rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    margin: 3rem auto;
    max-width: 720px;
}

.author-box-image {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.author-box-info {
    flex: 1;
}

.author-box-name {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.author-box-bio {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.author-box-links {
    display: flex;
    gap: 1rem;
}

.author-box-links a {
    color: var(--text-tertiary);
    transition: color 0.2s;
}

.author-box-links a:hover {
    color: var(--primary-color);
}

/* Related Posts */
.related-posts {
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
}

.related-posts-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    text-align: center;
}

.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

/* Error State */
.error-state {
    text-align: center;
    padding: 4rem 2rem;
    min-height: 50vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.error-state h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.error-state p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.error-state .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: #fff;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.2s;
}

.error-state .btn:hover {
    opacity: 0.9;
}

/* Responsive */
@media (max-width: 768px) {
    .blog-header {
        padding: 100px 0 40px;
    }

    .blog-title {
        font-size: 2rem;
    }

    .posts-grid {
        grid-template-columns: 1fr;
    }

    .post-detail-title {
        font-size: 1.75rem;
    }

    .post-body {
        padding: 0 1rem 3rem;
    }

    .post-body h2 {
        font-size: 1.5rem;
    }

    .post-body p,
    .post-body li {
        font-size: 1rem;
    }

    .author-box {
        flex-direction: column;
        text-align: center;
        margin: 2rem 1rem;
    }

    .author-box-image {
        margin: 0 auto;
    }

    .author-box-links {
        justify-content: center;
    }
}