/* ============================================
   AI DIRECTORY — BLOG PAGE STYLES
   ============================================ */

/* ── Blog Hero ── */
.blog-hero {
  padding: 72px 0 52px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.blog-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, #eef2ff 0%, transparent 70%);
  pointer-events: none;
}

.blog-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 16px;
  margin-top: 16px;
}

.blog-hero__title em {
  font-style: italic;
  color: var(--accent);
}

.blog-hero__subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin-inline: auto;
  margin-bottom: 36px;
  font-weight: 300;
}

.blog-search {
  display: flex;
  align-items: center;
  max-width: 520px;
  margin-inline: auto;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 100px;
  padding: 12px 20px;
  gap: 12px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
}

.blog-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(79,70,229,0.12), var(--shadow-md);
}

.blog-search i { color: var(--text-muted); }

.blog-search input {
  flex: 1;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 0.95rem;
  background: transparent;
  color: var(--text-primary);
}

.blog-search input::placeholder { color: var(--text-muted); }

/* ── Blog Filters ── */
.blog-filters {
  padding: 0 0 32px;
}

.blog-filter-pills {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.blog-filter-pills::-webkit-scrollbar { display: none; }

.blog-pill {
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1.5px solid var(--border);
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition);
  min-height: 40px;
  font-family: inherit;
}

.blog-pill:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

.blog-pill.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* ── Featured Post ── */
.blog-featured {
  padding-bottom: 48px;
}

.featured-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-slow);
  cursor: pointer;
}

.featured-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: var(--accent);
}

.featured-card__img {
  position: relative;
  overflow: hidden;
  min-height: 280px;
  background: linear-gradient(135deg, var(--accent-light) 0%, #e0e7ff 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.featured-card__img-placeholder {
  font-size: 5rem;
  opacity: 0.6;
}

.featured-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}

.featured-card__badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--accent);
  color: white;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 100px;
}

.featured-card__body {
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
}

.featured-card__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  padding: 4px 12px;
  border-radius: 100px;
  width: fit-content;
}

.featured-card__title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.featured-card__excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.featured-card__meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.featured-card__meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.featured-card__read-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  background: var(--accent);
  color: white;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  width: fit-content;
  font-family: inherit;
}

.featured-card__read-btn:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(79,70,229,0.3);
}

/* ── Blog Grid ── */
.blog-section { padding-bottom: 80px; }

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

/* ── Blog Card ── */
.blog-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-slow);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.blog-card__img {
  height: 180px;
  background: linear-gradient(135deg, var(--accent-light) 0%, #e0e7ff 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.blog-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}

.blog-card__tag-badge {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: white;
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 100px;
  border: 1px solid var(--accent-light);
}

.blog-card__body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.blog-card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  letter-spacing: -0.01em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card__excerpt {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.blog-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
}

.blog-card__meta-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.blog-card__read-link {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.78rem;
  transition: gap var(--transition);
}

.blog-card:hover .blog-card__read-link { gap: 8px; }

/* ── Blog Modal (Article Reader) ── */
.blog-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  backdrop-filter: blur(4px);
  animation: fadeIn 200ms ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.blog-modal {
  background: var(--surface);
  border-radius: var(--radius-xl);
  max-width: 780px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: slideUp 250ms ease;
  position: relative;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.blog-modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: all var(--transition);
  z-index: 10;
  font-family: inherit;
}

.blog-modal__close:hover { background: var(--border); color: var(--text-primary); }

.blog-modal__hero {
  height: 240px;
  background: linear-gradient(135deg, var(--accent-light) 0%, #c7d2fe 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  position: relative;
  overflow: hidden;
}

.blog-modal__hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}

.blog-modal__body { padding: 36px; }

.blog-modal__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-light);
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blog-modal__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 16px;
}

.blog-modal__meta {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.blog-modal__meta span { display: flex; align-items: center; gap: 5px; }

.blog-modal__content {
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--text-secondary);
}

.blog-modal__content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--text-primary);
  margin: 28px 0 12px;
}

.blog-modal__content p { margin-bottom: 16px; }

.blog-modal__content ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 16px;
}

.blog-modal__content ul li { margin-bottom: 6px; }

.blog-modal__content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 16px;
  color: var(--text-muted);
  font-style: italic;
  margin: 20px 0;
}

.blog-modal__pdf-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  background: var(--accent);
  color: white;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  margin-top: 24px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.blog-modal__pdf-btn:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

/* ── PDF Section ── */
.pdf-section {
  padding: 0 0 80px;
}

.pdf-upload-card {
  background: linear-gradient(135deg, var(--accent-light) 0%, #e0e7ff 100%);
  border: 1.5px solid #c7d2fe;
  border-radius: var(--radius-xl);
  padding: 56px 40px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.pdf-upload-icon {
  width: 72px;
  height: 72px;
  background: var(--accent);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: white;
  margin-bottom: 8px;
}

.pdf-upload-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 400;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.pdf-upload-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 440px;
  line-height: 1.7;
}

.pdf-upload-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--accent);
  color: white;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.pdf-upload-btn:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79,70,229,0.3);
}

.pdf-upload-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ── PDF Viewer ── */
.pdf-viewer-wrap {
  margin-top: 32px;
  background: #1a1a2e;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.pdf-viewer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: #16213e;
  gap: 16px;
  flex-wrap: wrap;
}

.pdf-viewer-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: rgba(255,255,255,0.8);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pdf-viewer-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.pdf-ctrl-btn {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px;
  color: white;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  font-family: inherit;
}

.pdf-ctrl-btn:hover { background: rgba(255,255,255,0.2); }

.pdf-page-info {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  white-space: nowrap;
  padding: 0 8px;
}

.pdf-canvas-wrap {
  display: flex;
  justify-content: center;
  padding: 32px;
  overflow-x: auto;
  background: #1a1a2e;
}

#pdfCanvas {
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  max-width: 100%;
}

.pdf-thumbnails {
  display: flex;
  gap: 8px;
  padding: 16px 24px;
  overflow-x: auto;
  background: #16213e;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.pdf-thumbnails::-webkit-scrollbar { display: none; }

.pdf-thumb {
  flex-shrink: 0;
  border: 2px solid transparent;
  border-radius: 6px;
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--transition);
  opacity: 0.6;
}

.pdf-thumb.active {
  border-color: var(--accent);
  opacity: 1;
}

.pdf-thumb:hover { opacity: 1; }

.pdf-thumb canvas { display: block; }

/* ── Empty State ── */
.blog-empty {
  grid-column: 1/-1;
  text-align: center;
  padding: 80px 24px;
}

.blog-empty__icon { font-size: 3rem; margin-bottom: 16px; opacity: 0.4; }
.blog-empty__title { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.blog-empty__desc { color: var(--text-muted); font-size: 0.9rem; }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .featured-card { grid-template-columns: 1fr; }
  .featured-card__img { min-height: 200px; }
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .blog-grid { grid-template-columns: 1fr; }
  .featured-card__body { padding: 24px; }
  .blog-modal__body { padding: 24px; }
  .pdf-upload-card { padding: 40px 24px; }
  .pdf-canvas-wrap { padding: 16px; }
  .pdf-viewer-header { flex-direction: column; align-items: flex-start; }
}