:root {
  --color-primary: #173979;
  --color-secondary: #859a68;
  --color-accent: #d96639;
  --color-white: #ffffff;
  --color-light-gray: #f5f5f5;
  --color-border: #e8e8e8;
  --color-text: #1a1a1a;
  --color-text-muted: #6b6b6b;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --max-width: 1200px;
  --header-height: 50px;
  --transition: 0.2s ease;
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-white);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--color-primary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.header-logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  flex-shrink: 0;
}
.header-logo img {
  height: 36px;
  width: auto;
}
.header-logo .logo-dark {
  display: none;
}
[data-theme="dark"] .header-logo .logo-light {
  display: none;
}
[data-theme="dark"] .header-logo .logo-dark {
  display: inline-block;
}
.header-categories {
  gap: 1.25rem;
  align-items: center;
  flex-wrap: wrap;
  order: 2;
}
@media (min-width: 769px) {
  .header-container {
    position: relative;
  }
  .header-categories {
    display: flex;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    padding: 0.75rem 1.5rem;
    gap: 1.25rem;
    transform: scaleY(0);
    transform-origin: top;
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.2s ease, visibility 0s linear 0.25s;
    background: var(--color-light-gray);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    z-index: 100;
    border-radius: 0 0 8px 8px;
  }
  .header-categories.active {
    transform: scaleY(1);
    opacity: 1;
    visibility: visible;
    transition: transform 0.25s ease, opacity 0.2s ease, visibility 0s;
  }
}
.header-categories a {
  color: var(--color-text);
  font-size: 0.9rem;
}
.header-categories a:hover {
  color: var(--color-accent);
}

.menu-toggle {
  order: 3;
}

.header-search-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  order: 1;
}
.search-toggle {
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition);
}
.search-toggle:hover {
  opacity: 0.9;
}
.search-toggle svg {
  display: block;
}
.theme-toggle {
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition);
}
.theme-toggle:hover {
  opacity: 0.9;
}
.theme-toggle svg {
  display: block;
}
.header-search {
  display: flex;
  width: 0;
  min-width: 0;
  overflow: hidden;
  transition: width 0.2s ease;
}
.header-search.expanded {
  width: 220px;
  min-width: 220px;
}
.header-search input {
  width: 100%;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.9rem;
  background: var(--color-white);
  color: var(--color-text);
}
.header-search input::placeholder {
  color: var(--color-text-muted);
}
.header-search input:focus {
  outline: none;
}

.btn-subscribe {
  background: var(--color-accent);
  color: var(--color-white) !important;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: opacity var(--transition);
}
.btn-subscribe:hover {
  opacity: 0.9;
}

.main-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.hero-section {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.hero-featured {
  position: relative;
}
.hero-featured img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  border-radius: 8px;
}
.hero-featured-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  color: var(--color-white);
  border-radius: 0 0 8px 8px;
}
.hero-featured-content h2 {
  line-height: 1.2;
}
.hero-featured .category-tag {
  background: var(--color-accent);
}
.hero-featured .meta {
  color: rgba(255,255,255,0.9);
  font-size: 0.85rem;
}

.hero-secondary {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.hero-card {
  display: flex;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
  min-height: 100px;
  align-items: flex-start;
}
.hero-card:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.hero-card img {
  width: 120px;
  height: 80px;
  min-width: 120px;
  min-height: 80px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
}
.hero-card-content {
  flex: 1;
  min-width: 0;
}
.hero-card-content h3 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.hero-card-content h3 a {
  color: var(--color-text);
}
.hero-card-content h3 a:hover {
  color: var(--color-accent);
}
.hero-card .meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.category-tag {
  display: inline-block;
  background: var(--color-secondary);
  color: var(--color-white) !important;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-right: 0.5rem;
  text-decoration: none;
}
a.category-tag:hover {
  opacity: 0.9;
  color: var(--color-white) !important;
}

.trending-articles {
  margin-top: 3rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
}
.show-more {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.95rem;
}
.show-more:hover {
  text-decoration: underline;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.article-card {
  background: var(--color-white);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.article-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.article-card img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}
.article-card-content {
  padding: 1rem;
}
.article-card-content h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}
.article-card-content h3 a {
  color: var(--color-text);
}
.article-card-content h3 a:hover {
  color: var(--color-accent);
}
.article-card .meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

.archive-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 2rem;
  align-items: start;
}
.archive-header {
  grid-column: 1 / -1;
  margin-bottom: 1.5rem;
}
.archive-content {
  grid-column: 1;
}
.archive-sidebar {
  grid-column: 2;
  grid-row: 2;
}
.archive-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}
.archive-meta {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}
.article-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.5rem;
}
.article-categories .category-tag {
  font-size: 0.7rem;
  padding: 0.15rem 0.4rem;
}
.article-categories .category-tag:hover {
  opacity: 0.9;
}
.archive-empty {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  padding: 2rem 0;
}
.archive-sidebar-box {
  background: var(--color-light-gray);
  border-radius: 8px;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  position: sticky;
  top: 1rem;
}
.category-list {
  list-style: none;
}
.category-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
}
.category-list li:last-child {
  border-bottom: none;
}
.category-list a {
  color: var(--color-text);
  font-size: 0.95rem;
}
.category-list a:hover,
.category-list a.active {
  color: var(--color-accent);
  font-weight: 600;
}
.category-count {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  background: var(--color-border);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}
.pagination-info {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}
.pagination-prev,
.pagination-next {
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  background: var(--color-light-gray);
  border: 1px solid var(--color-border);
}
.pagination-prev:hover,
.pagination-next:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.post-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2rem;
  align-items: start;
}
.post-single {
  min-width: 0;
}
.post-featured-image {
  margin-bottom: 1.5rem;
  border-radius: 8px;
  overflow: hidden;
}
.post-featured-image img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.post-header {
  margin-bottom: 1.5rem;
}
.post-single h1 {
  font-size: 2.25rem;
  margin: 0.5rem 0 1rem;
  line-height: 1.2;
  color: var(--color-text);
}
.post-single .post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}
.post-ai-summary {
  margin: 0 0 1.4rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(23,57,121,0.04) 0%, var(--color-light-gray) 100%);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}
.post-ai-summary-title {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}
.post-ai-summary-list {
  margin: 0;
  padding-left: 1.2rem;
}
.post-ai-summary-list li {
  margin: 0 0 0.45rem;
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.65;
}
.post-ai-summary-list li:last-child {
  margin-bottom: 0;
}
.post-single .post-content {
  font-size: 1.1rem;
  line-height: 1.8;
}
.post-single .post-content p {
  margin-bottom: 1rem;
}
.post-single .post-content ul, .post-single .post-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}
.post-single .post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}
.post-source {
  margin-top: 1.25rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}
.post-source a {
  font-weight: 600;
}

.post-sidebar {
  background: var(--color-light-gray);
  border-radius: 8px;
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  position: sticky;
  top: 1rem;
}
.sidebar-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-text);
}
.sidebar-posts {
  list-style: none;
}
.sidebar-post {
  margin-bottom: 1rem;
}
.sidebar-post:last-child {
  margin-bottom: 0;
}
.sidebar-post-link {
  display: flex;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
  transition: opacity var(--transition);
}
.sidebar-post-link:hover {
  opacity: 0.9;
}
.sidebar-post-link img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
}
.sidebar-post-placeholder {
  width: 80px;
  height: 80px;
  background: var(--color-secondary);
  opacity: 0.3;
  border-radius: 4px;
  flex-shrink: 0;
}
.sidebar-post-content {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
}
.sidebar-post-title {
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.3;
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sidebar-post-link:hover .sidebar-post-title {
  color: var(--color-accent);
}
.sidebar-post-meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.related-posts {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}
.related-posts-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--color-text);
}
.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.related-post-card {
  display: flex;
  flex-direction: column;
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.related-post-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(23, 57, 121, 0.08);
}
.related-post-thumb {
  flex-shrink: 0;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-light-gray);
}
.related-post-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.related-post-thumb .related-post-placeholder {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 100px;
  background: var(--color-secondary);
  opacity: 0.3;
}
.related-post-content {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
}
.related-post-title {
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.35;
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-post-card:hover .related-post-title {
  color: var(--color-accent);
}
.related-post-meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}
@media (max-width: 600px) {
  .related-posts-grid {
    grid-template-columns: 1fr;
  }
}

.footer {
  background: var(--color-primary);
  color: var(--color-white);
  margin-top: 3rem;
}
.footer-top {
  padding: 2rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}
.footer-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
}
.footer-category h4 {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  opacity: 0.95;
}
.footer-category ul {
  list-style: none;
}
.footer-category li {
  margin-bottom: 0.25rem;
}
.footer-category a {
  color: var(--color-white);
  font-size: 0.9rem;
  display: block;
  opacity: 0.9;
}
.footer-category a:hover {
  opacity: 1;
}
.footer-bottom {
  padding: 1rem 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.8;
}

.error-404 {
  text-align: center;
  padding: 4rem 2rem;
}
.error-404 h1 {
  font-size: 4rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}
.error-404 p {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.menu-toggle {
  display: block;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

@media (max-width: 992px) {
  .hero-section {
    grid-template-columns: 1fr;
  }
  .hero-secondary {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .hero-card {
    flex: 1 1 45%;
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .archive-layout {
    grid-template-columns: 1fr;
  }
  .archive-sidebar-box {
    position: static;
  }
  .header-container {
    position: relative;
    flex-wrap: wrap;
    height: auto;
    min-height: var(--header-height);
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
  }
  .header-search-wrap {
    order: 2;
  }
  .header-search-desktop {
    display: none !important;
  }
}
.header-search-overlay {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  padding: 0;
  transform: scaleY(0);
  transform-origin: top;
  opacity: 0;
  visibility: hidden;
  transition: transform 0.25s ease, opacity 0.2s ease, visibility 0s linear 0.25s;
  background: var(--color-light-gray);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  z-index: 101;
  border-radius: 0 0 8px 8px;
}
.header-search-overlay.active {
  transform: scaleY(1);
  opacity: 1;
  visibility: visible;
  transition: transform 0.25s ease, opacity 0.2s ease, visibility 0s;
}
.header-search-mobile {
  padding: 0.75rem 1.5rem;
}
.header-search-mobile input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 1rem;
  background: var(--color-white);
  color: var(--color-text);
}
.header-search-mobile input:focus {
  outline: none;
  border-color: var(--color-primary);
}
.header-search-mobile input::placeholder {
  color: var(--color-text-muted);
}
@media (min-width: 769px) {
  .header-search-mobile input {
    max-width: 400px;
  }
}
@media (max-width: 768px) {
  .header-categories {
    display: flex;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1.5rem;
    gap: 0.5rem;
    transform: scaleY(0);
    transform-origin: top;
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.2s ease, visibility 0s linear 0.25s;
    background: var(--color-light-gray);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    z-index: 100;
    border-radius: 0 0 8px 8px;
  }
  .header-categories.active {
    display: flex;
    transform: scaleY(1);
    opacity: 1;
    visibility: visible;
    transition: transform 0.25s ease, opacity 0.2s ease, visibility 0s;
  }
  .header-categories.active a {
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--color-border);
  }
  .header-categories.active a:last-child {
    border-bottom: none;
  }
  .hero-card {
    flex: 1 1 100%;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .post-layout {
    grid-template-columns: 1fr;
  }
  .post-sidebar {
    position: static;
  }
  .footer-categories {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 769px) {
  .header-container {
    position: static;
  }
  .header-categories {
    display: flex;
    position: static;
    margin-left: auto;
    order: 2;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    background: transparent;
    padding: 0;
    gap: 1.25rem;
  }
  .header-search-wrap {
    order: 3;
  }
  .header-search-overlay {
    display: none !important;
  }
  .menu-toggle {
    display: none;
  }
}

@media (max-width: 768px) {
  .header-container {
    gap: 0.35rem;
  }
  .header-search-wrap {
    order: 2;
    margin-left: auto;
  }
  .menu-toggle {
    display: block;
    order: 3;
    margin-left: 0;
  }
  .header-categories {
    order: 10;
  }
}

[data-theme="dark"] {
  --color-primary: #9bb4ff;
  --color-secondary: #9bb182;
  --color-accent: #ff8f62;
  --color-white: #11151d;
  --color-light-gray: #171d28;
  --color-border: #2a3344;
  --color-text: #e6ecf8;
  --color-text-muted: #a8b2c5;
}

[data-theme="dark"] .site-header {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
}

[data-theme="dark"] a {
  color: var(--color-accent);
}

[data-theme="dark"] .header-search input,
[data-theme="dark"] .header-search-mobile input {
  background: #0f131b;
  color: var(--color-text);
  border-color: var(--color-border);
}

[data-theme="dark"] .article-card,
[data-theme="dark"] .archive-sidebar-box,
[data-theme="dark"] .post-sidebar,
[data-theme="dark"] .related-post-card {
  border-color: var(--color-border);
}

[data-theme="dark"] .theme-toggle[aria-pressed="true"] {
  color: var(--color-accent);
}

[data-theme="dark"] .footer {
  background: #0d121a;
  color: var(--color-text);
}

[data-theme="dark"] .footer-category a {
  color: var(--color-text);
}

[data-theme="dark"] .footer-bottom {
  border-top-color: rgba(230, 236, 248, 0.14);
  color: var(--color-text-muted);
  opacity: 1;
}

img.logo-dark {
  margin-top: 8px;
}

section.post-ai-summary {
    border: 1px solid blue;
    padding: 15px;
    border-radius: 8px;
    background: #0000ff36;
    box-shadow: 0px 0px 1px 0px #6b6b6b;
margin-bottom: 15px;
}


.post-ai-summary-title {
    font-weight: 600;
}