/**
 * Enhanced Blog Page Styles
 * Modern, searchable, filterable blog with animations
 */

/* ============================================================================
   BLOG HERO
   ============================================================================ */

.blog-hero {
  padding: calc(80px + var(--space-3xl)) 0 var(--space-2xl);
  text-align: center;
  background: var(--gradient-dark);
  position: relative;
  overflow: hidden;
}

.blog-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(var(--border-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.1;
}

.blog-hero .hero-content {
  position: relative;
  z-index: 1;
}

.blog-hero .hero-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  margin-bottom: var(--space-md);
}

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

/* ============================================================================
   SEARCH SECTION
   ============================================================================ */

.search-section {
  padding: var(--space-2xl) 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 60px;
  z-index: var(--z-sticky);
  backdrop-filter: blur(10px);
}

.search-bar {
  margin-bottom: var(--space-lg);
}

.search-input-wrapper {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}

.search-icon {
  position: absolute;
  left: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  font-size: 1.125rem;
}

.search-input {
  width: 100%;
  padding: var(--space-md) var(--space-lg) var(--space-md) calc(var(--space-lg) * 3);
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  transition: all var(--transition-base);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--border-accent);
}

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

.clear-btn {
  position: absolute;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  opacity: 0;
  pointer-events: none;
}

.clear-btn.visible {
  opacity: 1;
  pointer-events: all;
}

.clear-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Tag Filter */
.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  margin-bottom: var(--space-lg);
}

.tag-filter .tag {
  cursor: pointer;
  transition: all var(--transition-fast);
}

/* Results Info */
.results-info {
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

#results-count {
  font-family: var(--font-mono);
}

/* ============================================================================
   BLOG GRID
   ============================================================================ */

.blog-section {
  padding: var(--space-3xl) 0;
  min-height: 60vh;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.blog-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.blog-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-primary);
}

.blog-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  transform-origin: left;
}

.blog-card:hover::before {
  transform: scaleX(1);
}

.blog-card-image {
  width: 100%;
  height: 200px;
  background: var(--gradient-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.blog-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-card-content {
  padding: var(--space-xl);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.blog-card-meta .meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.blog-card-meta i {
  color: var(--accent-primary);
}

.blog-card-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
  line-height: 1.3;
}

.blog-card-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.blog-card-title a:hover {
  color: var(--accent-primary);
}

.blog-card-excerpt {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

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

.blog-card-author {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.author-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-primary);
  font-weight: 600;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--accent-primary);
  font-weight: 500;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

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

/* ============================================================================
   EMPTY STATE
   ============================================================================ */

.empty-state {
  text-align: center;
  padding: var(--space-3xl);
  color: var(--text-secondary);
}

.empty-state i {
  color: var(--text-tertiary);
  margin-bottom: var(--space-lg);
  opacity: 0.5;
}

.empty-state h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.empty-state p {
  margin-bottom: var(--space-lg);
}

/* ============================================================================
   LOAD MORE
   ============================================================================ */

.load-more-container {
  text-align: center;
  padding: var(--space-xl) 0;
}

#load-more-btn {
  min-width: 200px;
}

/* ============================================================================
   SKELETON LOADING
   ============================================================================ */

.skeleton-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 450px;
}

.skeleton-card::before {
  content: '';
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.03) 50%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }

  .search-section {
    position: static;
  }

  .tag-filter {
    justify-content: flex-start;
  }

  .blog-card-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }
}

@media (max-width: 480px) {
  .blog-hero {
    padding: calc(80px + var(--space-2xl)) 0 var(--space-xl);
  }

  .blog-card-content {
    padding: var(--space-lg);
  }
}