/* ═══════════════════════════════════════════════════════════════════
   Syntarxis Ghost Theme — Identidade visual idêntica à landing page.
   Dark mode via [data-theme="dark"]. Performance-first, sem frameworks.
   ═══════════════════════════════════════════════════════════════════ */

/* ─── Design Tokens ─────────────────────────────────────────────── */
:root {
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.08);
  --border: #e2e8f0;
  --border-light: #f1f5f9;

  --text: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;

  --accent: #06b6d4;
  --accent-dark: #0891b2;
  --accent-light: rgba(6, 182, 212, 0.12);
  --accent-glow: rgba(6, 182, 212, 0.35);

  --green: #10b981;      --green-light: rgba(16, 185, 129, 0.12);
  --blue: #3b82f6;       --blue-light: rgba(59, 130, 246, 0.12);

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);

  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Reset ─────────────────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
.container { max-width: 1152px; margin: 0 auto; padding: 0 28px; }
.accent { color: var(--accent); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.brand-hi { color: var(--accent); }

/* ─── Navbar ────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}
.nav.scrolled { border-bottom-color: var(--border); background: rgba(255, 255, 255, 0.94); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 20px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-icon { border-radius: 7px; display: flex; flex-shrink: 0; }
.logo-text {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.03em;
}
.logo:hover { text-decoration: none; }
.logo:hover .logo-text { color: var(--text); }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links > a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-links > a:hover { color: var(--text); background: var(--bg-alt); text-decoration: none; }

.nav-links .btn-blog {
  background: var(--accent) !important;
  color: #ffffff !important;
  font-weight: 600 !important;
  margin-left: 6px;
  padding: 8px 18px !important;
}
.nav-links .btn-blog:hover { background: var(--accent-dark) !important; box-shadow: 0 2px 8px var(--accent-glow); }

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 7px 10px;
  font-size: 14px;
  line-height: 1;
  transition: all var(--transition);
  display: flex;
  align-items: center;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
[data-theme="dark"] .theme-icon-light { display: none; }
[data-theme="light"] .theme-icon-dark { display: none; }
:root:not([data-theme]) .theme-icon-dark { display: none; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all var(--transition); }

/* ─── Hero ──────────────────────────────────────────────────────── */
.blog-hero, .tag-header, .post-header {
  position: relative;
  text-align: center; color: #ffffff;
  padding: 120px 0 80px; overflow: hidden;
  background: linear-gradient(170deg, #0f172a 0%, #164e63 45%, #0e7490 75%, #0f172a 100%);
}
.blog-hero .container, .tag-header .container, .post-header .container { position: relative; z-index: 2; }

.blog-hero::before, .tag-header::before, .post-header::before {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 30%, transparent 70%);
}

.blog-hero .shape, .tag-header .shape {
  position: absolute; border-radius: 50%; filter: blur(100px); pointer-events: none;
}
.blog-hero .shape-1, .tag-header .shape-1 { width: 500px; height: 500px; background: #06b6d4; top: -180px; right: -120px; opacity: 0.45; }
.blog-hero .shape-2, .tag-header .shape-2 { width: 380px; height: 380px; background: #8b5cf6; bottom: -140px; left: -100px; opacity: 0.45; }

.hero-tag {
  display: inline-block;
  padding: 7px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.82rem; font-weight: 600;
  letter-spacing: 0.04em; text-transform: uppercase;
  margin-bottom: 24px;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}

.blog-hero h1, .tag-header h1 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.12;
  max-width: 20ch;
  margin: 0 auto 16px;
}

.blog-hero p, .tag-header p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

.blog-hero .btn, .tag-header .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 0.95rem;
  font-weight: 700;
  background: var(--accent);
  color: #ffffff;
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition);
}
.blog-hero .btn:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 4px 12px var(--accent-glow); text-decoration: none; }
.blog-hero .btn i { font-size: 0.85rem; }

/* ─── Section header ────────────────────────────────────────────── */
.section-header {
  text-align: center; max-width: 640px; margin: 0 auto 48px;
}
.section-tag {
  display: inline-block; padding: 5px 14px; border-radius: 999px;
  background: var(--accent-light); color: var(--accent-dark);
  font-size: 0.8rem; font-weight: 600; letter-spacing: 0.03em; text-transform: uppercase;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800; letter-spacing: -0.025em; line-height: 1.2; margin-bottom: 10px; color: var(--text);
}
.section-desc {
  font-size: 0.95rem; color: var(--text-secondary); line-height: 1.6; max-width: 520px; margin: 0 auto;
}

/* ─── Post Feed (cards) ─────────────────────────────────────────── */
.post-feed { padding: 88px 0; }
.post-feed .container { max-width: 900px; }

.post-card {
  display: grid; grid-template-columns: 260px 1fr; gap: 28px; align-items: start;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative; overflow: hidden;
}
.post-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), #a78bfa);
  opacity: 0; transition: opacity 0.3s ease;
}
.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}
.post-card:hover::before { opacity: 1; }

.post-card-image { display: block; border-radius: var(--radius); overflow: hidden; }
.post-card-image img { width: 100%; height: 180px; object-fit: cover; display: block; transition: transform 0.4s ease; }
.post-card:hover .post-card-image img { transform: scale(1.03); }

.post-card-tag {
  display: inline-block; padding: 4px 11px; border-radius: 999px;
  background: var(--accent-light); color: var(--accent-dark);
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.04em; margin-bottom: 10px; text-decoration: none;
}
.post-card-tag:hover { text-decoration: none; }

.post-card h2 { font-size: 1.18rem; margin-bottom: 8px; letter-spacing: -0.015em; line-height: 1.3; }
.post-card h2 a { color: var(--text); text-decoration: none; }
.post-card h2 a:hover { color: var(--accent); text-decoration: none; }

.post-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 14px; line-height: 1.6; }
.post-card-meta { display: flex; gap: 16px; font-size: 0.8rem; color: var(--text-tertiary); font-weight: 500; }

/* ─── Post Full ─────────────────────────────────────────────────── */
.post-header h1 {
  font-size: clamp(1.6rem, 4.5vw, 2.6rem);
  font-weight: 900; letter-spacing: -0.03em; line-height: 1.15;
  max-width: 22ch; margin: 0 auto 16px;
}
.post-meta { display: flex; gap: 16px; justify-content: center; font-size: 0.88rem; color: rgba(255, 255, 255, 0.6); }
.post-author { font-weight: 600; color: rgba(255, 255, 255, 0.85); }

.post-feature-image { max-width: 860px; margin: -32px auto 0; padding: 0 24px; position: relative; z-index: 1; }
.post-feature-image img { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-xl); }
.post-feature-image figcaption { text-align: center; font-size: 0.8rem; color: var(--text-tertiary); margin-top: 10px; }

.post-content { max-width: 720px; margin: 48px auto 0; font-size: 1.05rem; line-height: 1.85; }
.post-content h2 { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em; margin: 52px 0 16px; color: var(--text); }
.post-content h3 { font-size: 1.2rem; font-weight: 700; margin: 36px 0 12px; color: var(--text); }
.post-content p { margin-bottom: 22px; color: var(--text); }
.post-content a { color: var(--accent); font-weight: 500; }
.post-content ul, .post-content ol { margin: 0 0 22px 24px; color: var(--text-secondary); }
.post-content li { margin-bottom: 8px; }
.post-content blockquote {
  border-left: 3px solid var(--accent); padding: 18px 24px; margin: 28px 0;
  background: var(--bg-alt); border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-secondary); font-style: italic; font-size: 1.02rem;
}
.post-content pre { background: var(--text); color: #e2e8f0; padding: 22px; border-radius: var(--radius); overflow-x: auto; margin: 28px 0; font-size: 0.9rem; line-height: 1.7; }
.post-content code { background: var(--bg-alt); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }
.post-content pre code { background: none; padding: 0; border-radius: 0; }
.post-content img { max-width: 100%; border-radius: var(--radius-lg); margin: 28px 0; }
.post-content .kg-image { max-width: 100%; }
.post-content .kg-width-wide .kg-image { max-width: 85vw; margin-left: calc(50% - 42.5vw); width: 85vw; }
.post-content .kg-width-full .kg-image { max-width: 100vw; margin-left: calc(50% - 50vw); width: 100vw; border-radius: 0; }
.post-content .kg-width-wide figcaption,
.post-content .kg-width-full figcaption { padding: 0 24px; }
.post-content figure { margin: 36px 0; }
.post-content figcaption { text-align: center; font-size: 0.82rem; color: var(--text-tertiary); margin-top: 8px; }
.post-content table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 0.9rem; }
.post-content th, .post-content td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.post-content th { background: var(--bg-alt); font-weight: 600; }

/* Tags */
.post-tags { max-width: 720px; margin: 40px auto 0; display: flex; flex-wrap: wrap; gap: 10px; }
.post-tag {
  display: inline-block; padding: 6px 15px; border-radius: 999px;
  background: var(--bg-alt); border: 1px solid var(--border);
  color: var(--text-secondary); font-size: 0.84rem; font-weight: 500; text-decoration: none;
  transition: all var(--transition);
}
.post-tag:hover { background: var(--accent-light); color: var(--accent); border-color: var(--accent); text-decoration: none; }

/* Share */
.post-share { max-width: 720px; margin: 32px auto 0; display: flex; align-items: center; gap: 16px; font-size: 0.9rem; color: var(--text-secondary); }
.post-share a { color: var(--text-secondary); font-size: 18px; transition: color var(--transition); }
.post-share a:hover { color: var(--accent); text-decoration: none; }
.copy-link-btn { background: none; border: none; color: var(--text-secondary); font-size: 18px; cursor: pointer; transition: color var(--transition); padding: 0; }
.copy-link-btn:hover { color: var(--accent); }
.copy-link-btn.copied { color: #34d399; }

/* ─── Related Posts ─────────────────────────────────────────────── */
.related-posts { margin-top: 72px; padding-top: 48px; border-top: 1px solid var(--border); }
.related-posts h2 { font-size: 1.35rem; font-weight: 800; text-align: center; margin-bottom: 32px; letter-spacing: -0.02em; color: var(--text); }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; }
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.card img.card-image { width: 100%; height: 140px; object-fit: cover; border-radius: var(--radius); margin-bottom: 14px; }
.card h3 { font-size: 1rem; margin-bottom: 8px; font-weight: 700; }
.card h3 a { color: var(--text); text-decoration: none; }
.card h3 a:hover { color: var(--accent); text-decoration: none; }
.card p { color: var(--text-secondary); font-size: 0.86rem; line-height: 1.55; }
.card time { display: block; margin-top: 10px; font-size: 0.78rem; color: var(--text-tertiary); }

/* ─── Newsletter ────────────────────────────────────────────────── */
.newsletter-section {
  background: linear-gradient(140deg, #0f172a 0%, #164e63 70%, #0e7490 100%);
  color: #ffffff; padding: 72px 0; text-align: center; margin-top: 64px;
  position: relative; overflow: hidden;
}
.newsletter-section::before {
  content: ''; position: absolute;
  width: 320px; height: 320px;
  background: rgba(6, 182, 212, 0.12);
  border-radius: 50%; filter: blur(80px);
  top: -100px; right: -80px; pointer-events: none;
}
.newsletter-section .container { position: relative; z-index: 1; }
.newsletter-section h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  font-weight: 800; letter-spacing: -0.02em; margin-bottom: 10px;
}
.newsletter-section p { color: rgba(255, 255, 255, 0.65); font-size: 0.94rem; max-width: 440px; margin: 0 auto 24px; line-height: 1.6; }
.newsletter-form { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; max-width: 480px; margin: 0 auto; }
.newsletter-form input[type="email"] {
  flex: 1; min-width: 240px; padding: 13px 20px; border-radius: var(--radius);
  border: 1.5px solid rgba(255, 255, 255, 0.2); background: rgba(255, 255, 255, 0.08);
  color: #ffffff; font-family: var(--font); font-size: 0.94rem; outline: none;
  transition: border-color var(--transition);
}
.newsletter-form input[type="email"]:focus { border-color: var(--accent); }
.newsletter-form input[type="email"]::placeholder { color: rgba(255, 255, 255, 0.4); }
.newsletter-form button {
  padding: 13px 30px; border-radius: var(--radius); font-weight: 700; font-size: 0.94rem;
  background: var(--accent); color: #ffffff; border: none; cursor: pointer;
  font-family: var(--font); transition: all var(--transition);
}
.newsletter-form button:hover { background: var(--accent-dark); transform: translateY(-1px); box-shadow: 0 4px 12px var(--accent-glow); }
.newsletter-success { color: #34d399; margin-top: 14px; font-size: 0.9rem; font-weight: 500; }

/* ─── Pagination ────────────────────────────────────────────────── */
.pagination { display: flex; justify-content: center; align-items: center; gap: 24px; margin-top: 48px; padding-top: 36px; border-top: 1px solid var(--border); }
.pagination-current { font-size: 0.88rem; color: var(--text-secondary); font-weight: 500; }
.pagination-prev, .pagination-next {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 22px;
  border-radius: var(--radius); font-weight: 600; font-size: 0.9rem;
  color: var(--accent); border: 1.5px solid var(--accent);
  text-decoration: none; transition: all var(--transition);
}
.pagination-prev:hover, .pagination-next:hover { background: var(--accent-light); text-decoration: none; transform: translateY(-1px); }

/* ─── Footer ────────────────────────────────────────────────────── */
.footer { background: var(--text); color: #94a3b8; padding: 60px 0 28px; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr repeat(3, 1fr);
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-logo { display: inline-flex; text-decoration: none; margin-bottom: 14px; }
.footer-logo .logo-text { color: #ffffff; font-size: 1.15rem; }
.footer-desc { font-size: 0.84rem; line-height: 1.6; max-width: 320px; margin-bottom: 18px; color: #94a3b8; }

.footer-social-inline { display: flex; gap: 10px; }
.footer-social-inline a {
  width: 34px; height: 34px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  display: flex; align-items: center; justify-content: center;
  color: #94a3b8; text-decoration: none; font-size: 0.95rem;
  transition: all var(--transition);
}
.footer-social-inline a:hover { background: var(--accent); color: #ffffff; }

.footer-col h4 {
  font-size: 0.82rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.05em;
  color: #ffffff; margin-bottom: 18px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a {
  color: #94a3b8; text-decoration: none; font-size: 0.86rem;
  transition: color var(--transition);
}
.footer-col ul a:hover { color: #ffffff; }
.footer-links-social { display: flex; flex-direction: column; gap: 10px; }
.footer-links-social a {
  display: inline-flex; align-items: center; gap: 8px;
  color: #94a3b8; text-decoration: none; font-size: 0.86rem;
  transition: color var(--transition);
}
.footer-links-social a:hover { color: #ffffff; }
.footer-links-social a i { font-size: 14px; width: 18px; text-align: center; }
.footer-bottom { text-align: center; padding-top: 24px; font-size: 0.8rem; color: #64748b; }

.nav-rss {
  color: var(--text-secondary) !important;
  font-size: 0.9rem !important;
  padding: 8px 10px !important;
}
.nav-rss:hover { color: #f97316 !important; }

/* ─── Animations ────────────────────────────────────────────────── */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}
[data-animate].animate-in { opacity: 1; transform: none; }

[data-animate].animate-in .post-card { animation: card-cascade 0.45s ease both; }
[data-animate].animate-in .post-card:nth-child(2) { animation-delay: 0.06s; }
[data-animate].animate-in .post-card:nth-child(3) { animation-delay: 0.12s; }
[data-animate].animate-in .post-card:nth-child(4) { animation-delay: 0.18s; }
[data-animate].animate-in .post-card:nth-child(5) { animation-delay: 0.24s; }

@keyframes card-cascade {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-animate] { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ─── Responsive ────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .container { padding: 0 20px; }

  .blog-hero, .tag-header, .post-header { padding: 130px 0 64px; }
  .blog-hero h1, .tag-header h1 { font-size: 1.65rem; }

  .post-card { grid-template-columns: 1fr; gap: 18px; padding: 22px; }
  .post-card-image img { height: 200px; }

  .post-content { font-size: 1rem; }

  .newsletter-section { padding: 52px 0; }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }

  .nav-toggle { display: flex; z-index: 1001; }
  .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 20px; align-items: stretch; gap: 2px;
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open { display: flex; }
  .nav-links > a { padding: 12px 4px; font-size: 0.92rem; }
  .nav-links .btn-blog { margin: 10px 0 4px; text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .newsletter-form input[type="email"] { min-width: 100%; }
}

/* ═══════════════════════════════════════════════════════════════════
   DARK MODE
   ═══════════════════════════════════════════════════════════════════ */
[data-theme="dark"] {
  --bg: #0f172a;
  --bg-alt: #1a2332;
  --bg-card: #1e293b;
  --bg-glass: rgba(30, 41, 59, 0.6);
  --border: #334155;
  --border-light: #273548;
  --text: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.25);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] body { background: var(--bg); }
[data-theme="dark"] .nav { background: rgba(15, 23, 42, 0.85); backdrop-filter: blur(18px) saturate(180%); -webkit-backdrop-filter: blur(18px) saturate(180%); }
[data-theme="dark"] .nav.scrolled { background: rgba(15, 23, 42, 0.94); }
[data-theme="dark"] .nav-links > a:hover { background: rgba(255, 255, 255, 0.04); }
[data-theme="dark"] .blog-hero, [data-theme="dark"] .tag-header, [data-theme="dark"] .post-header { background: linear-gradient(170deg, #020617 0%, #1e293b 55%, #0f4c5c 100%); }
[data-theme="dark"] .blog-hero p, [data-theme="dark"] .tag-header p, [data-theme="dark"] .newsletter-section p { color: #94a3b8; }
[data-theme="dark"] .post-card { background: #1e293b; }
[data-theme="dark"] .post-card:hover { border-color: transparent; box-shadow: 0 0 0 1px rgba(6, 182, 212, 0.15), var(--shadow-xl); }
[data-theme="dark"] .card { background: #1e293b; border-color: #334155; }
[data-theme="dark"] .card:hover { border-color: var(--accent); }
[data-theme="dark"] .post-content blockquote { background: #1a2332; }
[data-theme="dark"] .post-tag { background: #1e293b; }
[data-theme="dark"] .copy-link-btn { color: #94a3b8; }
[data-theme="dark"] .copy-link-btn:hover { color: var(--accent); }
[data-theme="dark"] .newsletter-section { background: linear-gradient(140deg, #020617 0%, #1e293b 70%, #0f4c5c 100%); }