/* =========================================================
   PUBLIC BLOG STYLES
   Navbar, Hero Spotlight, Articles Grid, Filters, Footer
   ========================================================= */

/* Sticky Header & Navbar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  cursor: pointer;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* Hero Section */
.hero-section {
  padding: 3.5rem 0 2.5rem;
  position: relative;
}

.hero-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1rem;
  max-width: 900px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

/* Featured Article Card */
.featured-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--border-glow);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  margin-bottom: 3.5rem;
  transition: transform var(--transition-normal);
}

.featured-card:hover {
  transform: translateY(-4px);
}

.featured-img-wrap {
  position: relative;
  overflow: hidden;
  min-height: 380px;
}

.featured-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.featured-card:hover .featured-img-wrap img {
  transform: scale(1.04);
}

.featured-content {
  padding: 2.75rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.featured-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.featured-title {
  font-size: 1.95rem;
  line-height: 1.3;
  margin-bottom: 1rem;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.featured-title:hover {
  color: var(--text-accent);
}

.featured-excerpt {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

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

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-glow);
}

/* Search & Filters Toolbar */
.toolbar-section {
  margin-bottom: 2.5rem;
}

.toolbar-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 260px;
}

.search-box svg {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.search-input {
  width: 100%;
  padding: 0.65rem 1rem 0.65rem 2.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  border-color: var(--accent-primary);
}

.category-pills {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 4px;
}

.category-pill {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.category-pill:hover, .category-pill.active {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.3);
}

/* Articles Grid */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.post-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.post-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-lg);
}

.post-cover-wrap {
  position: relative;
  width: 100%;
  height: 220px;
  overflow: hidden;
  background: var(--bg-secondary);
}

.post-cover-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.post-card:hover .post-cover-wrap img {
  transform: scale(1.06);
}

.post-category-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 2;
}

.post-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.post-card-title {
  font-size: 1.35rem;
  line-height: 1.35;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

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

.post-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.5rem;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.post-stats {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

/* Newsletter & AI Callout */
.newsletter-card {
  padding: 3rem;
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  border: 1px solid var(--border-glow);
  box-shadow: var(--shadow-lg);
  text-align: center;
  margin-bottom: 4rem;
  position: relative;
  overflow: hidden;
}

.newsletter-form {
  display: flex;
  max-width: 500px;
  margin: 1.5rem auto 0;
  gap: 0.5rem;
}

/* Footer */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 0 2.5rem;
  margin-top: 5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  margin-top: 0.75rem;
  max-width: 320px;
  font-size: 0.9rem;
}

.footer-col h4 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-link:hover {
  color: var(--text-accent);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Responsive adjustments */
@media (max-width: 1024px) {
  .featured-card {
    grid-template-columns: 1fr;
  }
  .featured-img-wrap {
    min-height: 260px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title { font-size: 2.3rem; }
  .posts-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .newsletter-card { padding: 2rem 1.5rem; }
  .newsletter-form { flex-direction: column; }
}