/* Modern Blog Site Styles - Corporate Blue Theme (BDHA Style) */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-card: #ffffff;
  --bg-accent: #e9ecef;
  --bg-dark: #1a365d;
  --bg-darker: #0f2744;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-light: #ffffff;
  --accent-primary: #2563eb;
  --accent-secondary: #1d4ed8;
  --accent-light: #3b82f6;
  --accent-gradient: linear-gradient(135deg, #1a365d 0%, #2563eb 100%);
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-dark);
  box-shadow: var(--shadow-md);
}

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

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo img {
  height: 48px;
  max-width: 180px;
  object-fit: contain;
}

.logo-text {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-light);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  padding: 10px 18px;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  border-radius: 8px;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--text-light);
  border-radius: 2px;
  transition: var(--transition);
}

/* Main Content */
.site-main {
  flex: 1;
  padding: 48px 0;
}

/* Hero Section */
.hero-section {
  text-align: center;
  padding: 60px 0 80px;
  background: var(--accent-gradient);
  margin: -48px -24px 48px -24px;
  padding-left: 24px;
  padding-right: 24px;
}

.hero-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--text-light);
}

.hero-subtitle {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin: 0 auto;
}

/* Blog Grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 32px;
  margin-top: 0;
}

/* Blog Card */
.blog-card {
  background: var(--bg-card);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}

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

.blog-card-image {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
}

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

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

.blog-card-image .category-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 14px;
  background: var(--accent-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.blog-card-placeholder {
  width: 100%;
  height: 100%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
}

.blog-card-placeholder svg {
  width: 48px;
  height: 48px;
  color: rgba(255, 255, 255, 0.5);
}

.blog-card-content {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

.blog-card-meta .author {
  display: flex;
  align-items: center;
  gap: 6px;
}

.blog-card-title {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 12px;
}

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

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

.blog-card-excerpt {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}

.read-more:hover {
  gap: 12px;
  color: var(--accent-secondary);
}

.view-count {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 13px;
}

/* Pagination */
.pagination-container {
  display: flex;
  justify-content: center;
  margin-top: 64px;
}

.pagination {
  display: flex;
  gap: 8px;
  list-style: none;
}

.pagination a,
.pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 44px;
  padding: 0 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.pagination a:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
}

.pagination .active span {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
}

/* Category Header */
.category-header {
  text-align: center;
  padding: 40px 0 60px;
  background: var(--accent-gradient);
  margin: -48px -24px 48px -24px;
  padding-left: 24px;
  padding-right: 24px;
}

.category-header h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-light);
}

.category-header p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 16px;
}

/* Post Detail */
.post-detail {
  max-width: 100%;
  margin: 0 auto;
  background: var(--bg-card);
  padding: 48px;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
}

.post-header {
  text-align: center;
  margin-bottom: 40px;
}

.post-category {
  display: inline-block;
  padding: 8px 20px;
  background: var(--accent-primary);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
  text-decoration: none;
}

.post-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
  color: var(--text-primary);
  word-wrap: break-word;
  overflow-wrap: break-word;
  word-break: break-word;
}

.post-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  color: var(--text-muted);
  font-size: 14px;
}

.post-meta .author {
  display: flex;
  align-items: center;
  gap: 8px;
}

.post-featured-image {
  margin-bottom: 40px;
  border-radius: 12px;
  overflow: hidden;
}

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

.post-content {
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-secondary);
  word-wrap: break-word;
  overflow-wrap: break-word;
  word-break: break-word;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
  color: var(--text-primary);
  margin: 36px 0 18px;
  font-weight: 600;
}

.post-content h2 {
  font-size: 26px;
}

.post-content h3 {
  font-size: 22px;
}

.post-content h4 {
  font-size: 18px;
}

.post-content p {
  margin-bottom: 20px;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  margin: 28px 0;
}

.post-content a {
  color: var(--accent-primary);
  text-decoration: underline;
}

.post-content blockquote {
  border-left: 4px solid var(--accent-primary);
  padding: 20px 24px;
  margin: 28px 0;
  background: var(--bg-secondary);
  border-radius: 0 10px 10px 0;
  font-style: italic;
}

.post-content code {
  background: var(--bg-secondary);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
}

.post-content pre {
  background: var(--bg-dark);
  padding: 24px;
  border-radius: 10px;
  overflow-x: auto;
  margin: 28px 0;
  color: var(--text-light);
}

.post-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.post-content ul,
.post-content ol {
  margin: 20px 0;
  padding-left: 24px;
}

.post-content li {
  margin-bottom: 10px;
}

/* Post Tags */
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
}

.post-tag {
  padding: 8px 16px;
  background: var(--bg-secondary);
  border-radius: 20px;
  color: var(--text-secondary);
  font-size: 13px;
  text-decoration: none;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.post-tag:hover {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

/* Post Gallery */
.post-gallery {
  margin-top: 40px;
}

.post-gallery h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.gallery-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.gallery-item {
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow-md);
}

.gallery-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition);
}

.gallery-item:hover img {
  transform: scale(1.02);
}

/* Related Posts */
.related-posts {
  margin-top: 80px;
  padding-top: 48px;
  border-top: 1px solid var(--border-color);
}

.related-posts h2 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 32px;
  text-align: center;
  color: var(--text-primary);
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

/* Share Buttons */
.share-buttons {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
}

.share-buttons span {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}

.share-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border-radius: 10px;
  color: var(--text-secondary);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.share-btn:hover {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

/* Footer */
.site-footer {
  background: var(--bg-dark);
  padding: 48px 0 24px;
  margin-top: auto;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 32px;
  margin-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-light);
}

.footer-desc {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.8);
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--accent-primary);
  color: #fff;
}

.footer-bottom {
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  background: var(--bg-card);
  border-radius: 16px;
}

.empty-state svg {
  width: 80px;
  height: 80px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.empty-state h2 {
  font-size: 24px;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.empty-state p {
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-links.open {
    display: flex;
  }

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

  .hero-section,
  .category-header {
    margin-left: -24px;
    margin-right: -24px;
    padding: 40px 24px 60px;
  }

  .post-detail {
    padding: 24px;
  }

  .post-meta {
    flex-direction: column;
    gap: 12px;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 24px;
  }

  .category-header h1 {
    font-size: 28px;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.blog-card {
  animation: fadeIn 0.5s ease forwards;
}

.blog-card:nth-child(1) {
  animation-delay: 0.1s;
}

.blog-card:nth-child(2) {
  animation-delay: 0.15s;
}

.blog-card:nth-child(3) {
  animation-delay: 0.2s;
}

.blog-card:nth-child(4) {
  animation-delay: 0.25s;
}

.blog-card:nth-child(5) {
  animation-delay: 0.3s;
}

.blog-card:nth-child(6) {
  animation-delay: 0.35s;
}

/* Text danger for validation */
.text-danger {
  color: #dc2626;
  font-size: 13px;
  margin-top: 6px;
  display: block;
}

/* Footer email */
.footer-email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-light);
  text-decoration: none;
  font-size: 14px;
  margin-top: 12px;
  transition: var(--transition);
  opacity: 0.8;
}

.footer-email:hover {
  opacity: 1;
  color: #fff;
}

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

/* Category Dropdown Filter */
.category-dropdown-filter {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 0 40px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 40px;
}

.category-dropdown-filter label {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.category-select {
  padding: 12px 40px 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%234a5568' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  min-width: 200px;
}

.category-select:hover {
  border-color: var(--accent-primary);
}

.category-select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Blog List (Single Column) */
.blog-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.blog-list-item {
  display: flex;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-primary);
  transition: var(--transition);
}

.blog-list-item:first-child {
  padding-top: 0;
}

.blog-list-item:hover {
  background: var(--bg-secondary);
  padding-left: 16px;
  padding-right: 16px;
  margin-left: -16px;
  margin-right: -16px;
  border-radius: 12px;
}

.blog-list-image {
  flex-shrink: 0;
  width: 480px;
  height: 300px;
  border-radius: 12px;
  overflow: hidden;
}

.blog-list-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.blog-list-item:hover .blog-list-image img {
  transform: scale(1.05);
}

.blog-list-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.blog-list-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
  font-size: 13px;
}

.blog-list-meta .category-badge {
  padding: 4px 12px;
  background: var(--accent-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  border-radius: 15px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  text-decoration: none;
}

.blog-list-meta .date {
  color: var(--text-muted);
}

.blog-list-meta .views {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
}

.blog-list-title {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 12px;
  word-wrap: break-word;
  overflow-wrap: break-word;
  word-break: break-word;
}

.blog-list-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition);
}

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

.blog-list-excerpt {
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.7;
  margin-bottom: 16px;
  word-wrap: break-word;
  overflow-wrap: break-word;
  word-break: break-word;
}

.blog-list-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  overflow: hidden;
}

/* Responsive Blog List */
@media (max-width: 768px) {
  .blog-list-item {
    flex-direction: column;
    gap: 20px;
  }

  .blog-list-image {
    width: 100%;
    height: 200px;
  }

  .blog-list-title {
    font-size: 20px;
  }

  .category-filter {
    gap: 8px;
  }

  .category-filter-item {
    padding: 8px 16px;
    font-size: 13px;
  }
}