/* ============================================================
   DigiviseAI — blog.css
   Blog-specific styles, extends styles.css
   ============================================================ */

/* ══ Blog Hero ══ */
.blog-hero {
  padding: 8rem 0 3rem;
  background: var(--color-bg);
  text-align: center;
}
.blog-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 0.5rem;
}
.blog-hero-sub {
  font-size: 1.125rem;
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto;
}

/* ══ Category Filters ══ */
.blog-filters {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 64px;
  z-index: 50;
}
.blog-filters .container {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.blog-filters .container::-webkit-scrollbar { display: none; }

.cat-filter {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-btn);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-light);
  background: transparent;
  border: 1px solid var(--color-border);
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.2s;
  cursor: pointer;
}
.cat-filter:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.cat-filter.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ══ Blog Grid ══ */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
  padding: 2rem 0;
}

/* ══ Blog Card ══ */
.blog-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow 0.3s, transform 0.3s;
}
.blog-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.blog-card a {
  text-decoration: none;
  color: inherit;
  display: block;
}
.blog-card-thumb {
  height: 200px;
  overflow: hidden;
  background: var(--color-tint);
}
.blog-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.card-thumb-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-tint), rgba(13,148,136,0.08));
}
.blog-card-body {
  padding: 1.5rem;
}
.blog-card-cat {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}
.blog-card-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 0.5rem;
  line-height: 1.35;
}
.blog-card-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin: 0 0 1rem;
}
.blog-card-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* ══ Pagination ══ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  padding: 3rem 0;
}
.page-link {
  display: inline-block;
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-btn);
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  text-decoration: none;
  transition: all 0.2s;
}
.page-link:hover {
  background: var(--color-primary);
  color: #fff;
}
.page-info {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* ══ Breadcrumb ══ */
.breadcrumb {
  padding: 6rem 0 0.75rem;
  background: var(--color-bg);
}
.breadcrumb .container {
  font-size: 0.85rem;
  color: var(--color-text-light);
}
.breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb-sep {
  margin: 0 0.5rem;
  color: var(--color-text-light);
  opacity: 0.5;
}
.breadcrumb-current {
  color: var(--color-text);
}

/* ══ Article Page ══ */
.article-page {
  padding: 1rem 0 4rem;
  background: var(--color-bg);
}
.article-container {
  max-width: 720px;
}

.article-header {
  margin-bottom: 2.5rem;
}
.article-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: 1rem;
}
.article-header h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 1.5rem;
  line-height: 1.2;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.article-author-img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
}
.article-meta-text {
  display: flex;
  flex-direction: column;
}
.article-author-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text);
}
.article-date {
  font-size: 0.825rem;
  color: var(--color-text-light);
}

/* ══ Article Content ══ */
.article-content {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text);
}
.article-content h2 {
  font-family: var(--font-heading);
  font-size: 1.625rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  color: var(--color-text);
}
.article-content h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--color-text);
}
.article-content p {
  margin: 0 0 1.5rem;
}
.article-content img {
  max-width: 100%;
  border-radius: 12px;
  margin: 1.5rem 0;
}
.article-content blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  border-left: 4px solid var(--color-primary);
  background: var(--color-tint);
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: var(--color-text-light);
}
.article-content blockquote p { margin: 0; }
.article-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.15em 0.4em;
  background: rgba(13,148,136,0.08);
  border-radius: 4px;
  color: var(--color-primary-dk);
}
.article-content pre {
  background: var(--color-dark);
  color: #e0e0e0;
  padding: 1.25rem 1.5rem;
  border-radius: 12px;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.875rem;
  line-height: 1.6;
}
.article-content pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}
.article-content ul, .article-content ol {
  margin: 0 0 1.5rem;
  padding-left: 1.5rem;
}
.article-content li {
  margin-bottom: 0.5rem;
}
.article-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.article-content a:hover {
  color: var(--color-primary-dk);
}

/* ══ Tags ══ */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 2.5rem 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}
.article-tag {
  display: inline-block;
  padding: 0.35rem 0.875rem;
  border-radius: var(--radius-btn);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-primary);
  background: rgba(13,148,136,0.08);
  border: 1px solid rgba(13,148,136,0.15);
}

/* ══ Article CTA ══ */
.article-cta {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-card);
  padding: 2.5rem;
  text-align: center;
  margin: 3rem 0;
}
.article-cta h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin: 0 0 0.75rem;
}
.article-cta p {
  color: rgba(255,255,255,0.85);
  margin: 0 0 1.5rem;
  font-size: 1rem;
}
.article-cta .btn,
.article-cta .btn.btn-primary {
  display: inline-block;
  background: #ffffff !important;
  color: #0D9488 !important;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.75rem 2rem;
  border-radius: 50px;
  border: none;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  text-decoration: none;
  transition: all 0.3s ease;
}
.article-cta .btn:hover,
.article-cta .btn.btn-primary:hover {
  background: #F0FDFB !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

/* ══ Related Articles ══ */
.related-articles {
  margin-top: 3rem;
}
.related-articles h3 {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}
.related-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--color-surface);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  padding: 1.25rem;
  transition: box-shadow 0.3s, transform 0.3s;
}
.related-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}
.related-card img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 0.75rem;
}
.related-category {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: 0.35rem;
}
.related-card h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 0.35rem;
  line-height: 1.35;
}
.related-date {
  font-size: 0.75rem;
  color: var(--color-text-light);
}

/* ══ Nav Active State ══ */
.nav-active {
  color: var(--color-primary) !important;
}

/* ══ Image Fallbacks ══ */
.article-author-img {
  position: relative;
  background: #0D9488;
}
.article-author-img-fallback {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0D9488, #06B6D4);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}
.blog-card-thumb img {
  background: linear-gradient(135deg, var(--color-tint), rgba(13,148,136,0.08));
}

/* ══ Responsive ══ */
@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .article-cta {
    padding: 1.75rem;
  }
  .blog-hero {
    padding: 7rem 0 2rem;
  }
}

@media (max-width: 480px) {
  .blog-card-thumb {
    height: 160px;
  }
  .article-header h1 {
    font-size: 1.75rem;
  }
}