:root {
  --bg: #090d18;
  --surface: #0f1624;
  --surface2: #16202f;
  --border: rgba(255, 255, 255, 0.07);
  --accent: #3b82f6;
  --accent2: #06b6d4;
  --accent-glow: rgba(59, 130, 246, 0.18);
  --text: #f0f4ff;
  --text-muted: #8a9ab5;
  --text-dim: #4a5568;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', 'Segoe UI', sans-serif;
  min-height: 100vh;
}

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

a { color: inherit; text-decoration: none; }

.blog-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 62px;
  background: rgba(9, 13, 24, 0.88);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 500;
}

.blog-nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  gap: 16px;
}

.blog-nav__logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 20px;
  color: var(--text);
  letter-spacing: -0.02em;
}

.blog-nav__logo span {
  color: var(--accent);
}

.blog-nav__links {
  display: flex;
  gap: 20px;
  font-size: 13px;
  font-family: 'DM Sans', sans-serif;
  color: var(--text-muted);
  flex: 1;
  justify-content: center;
  flex-wrap: wrap;
}

.blog-nav__links a {
  color: var(--text-muted);
  transition: color var(--transition);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.blog-nav__links a:hover,
.blog-nav__links a.active {
  color: var(--text);
}

.blog-nav__links a.active {
  border-bottom-color: var(--accent);
}

.blog-nav__actions {
  flex-shrink: 0;
}

.blog-nav__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 20px;
  border-radius: 999px;
  background: var(--accent);
  font-size: 13px;
  font-weight: 500;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 5px 20px rgba(59, 130, 246, 0.3);
}

.blog-nav__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(59, 130, 246, 0.4);
}

main {
  margin-top: 62px;
}

.page-hero {
  padding: 120px 40px 64px;
  position: relative;
  overflow: hidden;
}

.page-hero .page-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-flex;
  gap: 8px;
  padding: 5px 14px;
  border-radius: 100px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--accent2);
  text-transform: uppercase;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.22);
  margin-bottom: 18px;
  align-items: center;
}

.hero-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(44px, 5.5vw, 72px);
  line-height: 1.05;
  letter-spacing: -2px;
  margin: 0;
}

.hero-title em {
  display: inline-block;
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  font-size: 17px;
  color: var(--text-muted);
  max-width: 460px;
  margin-top: 12px;
}

.hero-ghost {
  position: absolute;
  top: 80px;
  right: 40px;
  font-family: 'Syne', sans-serif;
  font-size: 160px;
  letter-spacing: 0.5em;
  color: rgba(255, 255, 255, 0.018);
  pointer-events: none;
  user-select: none;
}

.featured-post {
  max-width: 1200px;
  margin: 0 auto 40px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.featured-post:hover {
  transform: translateY(-5px);
  box-shadow: 0 32px 72px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(59, 130, 246, 0.18);
}

.featured-post__link {
  display: grid;
  grid-template-columns: inherit;
  color: inherit;
  text-decoration: none;
}

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

.featured-post__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.featured-post__badge {
  position: absolute;
  top: 20px;
  left: 20px;
  background: var(--accent);
  color: #fff;
  padding: 5px 12px;
  border-radius: 100px;
  font-size: 10px;
  letter-spacing: 1px;
  font-family: 'JetBrains Mono', monospace;
}

.featured-post__content {
  padding: 52px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.post-meta-row {
  display: flex;
  gap: 14px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-dim);
}

.tag-pill {
  padding: 4px 12px;
  border-radius: 100px;
  border: 1px solid rgba(59, 130, 246, 0.2);
  background: rgba(59, 130, 246, 0.11);
  color: var(--accent2);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
}

.featured-post__content h2 {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 30px;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin: 0 0 16px;
}

.featured-post__content p {
  margin: 0 0 32px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.75;
}

.featured-post__cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  transition: gap var(--transition);
}

.featured-post__cta svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
}

.featured-post__cta:hover {
  gap: 16px;
}

.post-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 40px 80px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.post-card {
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.post-card__link {
  color: inherit;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.post-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 22px 52px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(59, 130, 246, 0.14);
}

.post-card__media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.post-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.post-card__media:hover img {
  transform: scale(1.06);
}

.post-card__body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.post-card__body h3 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
  letter-spacing: -0.3px;
  margin: 0 0 10px;
}

.post-card__body p {
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-muted);
  margin: 0 0 18px;
  flex: 1;
}

.post-card__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-dim);
}

.placeholder-card {
  border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.025);
  border: 1px dashed rgba(59, 130, 246, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 28px;
  font-family: 'DM Sans', sans-serif;
  color: var(--text-muted);
}

.placeholder-card span {
  font-size: 40px;
  display: block;
  margin-bottom: 12px;
}

.animate-fadeup {
  opacity: 0;
  animation: fadeUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  animation-delay: var(--delay, 0s);
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1100px) {
  .post-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .page-hero {
    padding: 120px 24px 64px;
  }
  .featured-post__content {
    padding: 32px;
  }
  .post-grid {
    grid-template-columns: 1fr;
    padding: 32px 24px 80px;
  }
  .blog-nav__links {
    justify-content: flex-start;
  }
}

@media (max-width: 600px) {
  .blog-nav__links {
    display: none;
  }
  .blog-nav__inner {
    justify-content: space-between;
  }
}

/* Detail page */

#reading-progress {
  position: fixed;
  top: 62px;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 200;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  width: 0;
  transition: width 0.08s linear;
  box-shadow: 0 0 10px var(--accent-glow);
}

.page-detail {
  padding: 120px 40px 96px;
}

.back-link {
  max-width: 1200px;
  margin: auto;
  padding: 24px 40px 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-muted);
}

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

.article-hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px;
  display: grid;
  gap: 64px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: center;
}

.article-hero__badge {
  display: inline-flex;
  gap: 8px;
  padding: 5px 14px;
  border-radius: 100px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.22);
  font-size: 11px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent2);
  text-transform: uppercase;
  letter-spacing: 0.2em;
}

.article-hero__title {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin: 24px 0 12px;
}

.article-hero__meta {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  align-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-muted);
}

.author-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px;
  border-radius: 100px;
  background: var(--surface2);
  border: 1px solid var(--border);
}

.author-chip__avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-family: 'Syne', sans-serif;
  color: #fff;
}

.article-hero__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.article-hero__image img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.article-hero__image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.07);
  pointer-events: none;
}

article-layout {
  display: block;
}

.article-content-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px 96px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 64px;
}

@media (max-width: 1024px) {
  .article-content-wrapper {
    grid-template-columns: 1fr;
  }
}

.lead-paragraph {
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  font-size: 19px;
  line-height: 1.82;
  color: var(--text-muted);
  padding: 28px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}

.article-content h2 {
  font-family: 'Syne', sans-serif;
  font-size: 26px;
  letter-spacing: -0.5px;
  color: var(--text);
  margin: 52px 0 18px;
  padding-left: 20px;
  position: relative;
}

.article-content h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent2));
}

.article-content h3 {
  font-family: 'Syne', sans-serif;
  font-size: 20px;
  margin: 36px 0 12px;
  color: var(--text);
}

.article-content p {
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  line-height: 1.88;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.article-content strong {
  color: var(--text);
  font-weight: 500;
}

.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.article-content a:hover {
  color: var(--accent2);
}

.article-content ul,
.article-content ol {
  list-style: none;
  padding-left: 0;
  margin-bottom: 22px;
}

.article-content li {
  position: relative;
  padding-left: 24px;
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.article-content ul li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.article-content blockquote {
  margin: 44px 0;
  padding: 28px 36px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(6, 182, 212, 0.04));
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-family: 'DM Sans', sans-serif;
  font-style: italic;
  color: var(--text);
  line-height: 1.65;
  font-size: 18px;
}

.article-content img {
  width: 100%;
  border-radius: var(--radius-md);
  margin: 32px 0;
  border: 1px solid var(--border);
}

.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

.article-content code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  background: var(--surface2);
  padding: 2px 8px;
  border-radius: 5px;
  color: var(--accent2);
  border: 1px solid var(--border);
}

.article-content pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  overflow-x: auto;
  margin: 28px 0;
}

.article-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--accent2);
}

.cta-block {
  margin-top: 52px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.09), rgba(6, 182, 212, 0.06));
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.cta-block h3 {
  margin: 0 0 6px;
  font-family: 'Syne', sans-serif;
  font-size: 20px;
}

.cta-block p {
  margin: 0;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  color: var(--text-muted);
}

.cta-block__btn {
  background: var(--accent);
  color: #fff;
  padding: 12px 28px;
  border-radius: 100px;
  font-size: 14px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 500;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.cta-block__btn:hover {
  background: #2563eb;
  transform: translateY(-1px);
  box-shadow: 0 8px 28px rgba(59, 130, 246, 0.3);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.tag-row .tag-pill {
  background: var(--surface2);
  border-color: var(--border);
  color: var(--text-muted);
}

.sidebar {
  position: sticky;
  top: 86px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sidebar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
}

.sidebar-card h4 {
  font-family: 'Syne', sans-serif;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-dim);
  margin: 0 0 14px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.toc-item {
  display: flex;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
  background: transparent;
  border: none;
  width: 100%;
  color: var(--text-muted);
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  cursor: pointer;
}

.toc-item:last-child {
  border-bottom: none;
}

.toc-item span {
  line-height: 1.4;
}

.toc-item .toc-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--accent);
  min-width: 18px;
  margin-top: 2px;
}

.toc-item:hover {
  color: var(--text);
}

.share-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.share-pill,
.share-pill:visited {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 100px;
  border: 1px solid var(--border);
  font-family: 'DM Sans', sans-serif;
  font-size: 12px;
  color: var(--text-muted);
  background: transparent;
  cursor: pointer;
  transition: border var(--transition), color var(--transition), background var(--transition);
}

.share-pill svg {
  width: 12px;
  height: 12px;
  fill: currentColor;
}

.share-pill:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.07);
}

.related-post {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  align-items: center;
}

.related-post:last-child {
  border-bottom: none;
}

.related-thumb {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}

.related-info h5 {
  margin: 0 0 4px;
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  color: var(--text);
  line-height: 1.4;
}

.related-info p {
  margin: 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-dim);
}

.related-post:hover {
  opacity: 0.75;
}

.author-card {
  text-align: center;
}

.author-card__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Syne', sans-serif;
  color: #fff;
}

.author-card p {
  margin: 6px 0;
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  color: var(--text-muted);
}

.sidebar-card a {
  color: var(--accent);
}