:root {
  --bg-dark: #090d16;
  --bg-surface: #0f172a;
  --bg-card: rgba(30, 41, 59, 0.7);
  --bg-card-hover: rgba(51, 65, 85, 0.8);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(16, 185, 129, 0.3);
  --primary: #10b981;
  --primary-light: #34d399;
  --primary-glow: rgba(16, 185, 129, 0.25);
  --accent-indigo: #6366f1;
  --accent-amber: #f59e0b;
  --accent-cyan: #06b6d4;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  background: radial-gradient(circle at 50% 0%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 10% 30%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
              radial-gradient(circle at 90% 70%, rgba(6, 182, 212, 0.06) 0%, transparent 40%),
              var(--bg-dark);
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Navigation ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 13, 22, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 18px 0;
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.5px;
}

.brand-badge {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-cyan) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px var(--primary-glow);
  font-weight: 900;
  color: #022c22;
  font-size: 20px;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--text-main);
}

.nav-cta {
  background: linear-gradient(135deg, var(--primary) 0%, #059669 100%);
  color: #022c22;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  box-shadow: 0 4px 14px var(--primary-glow);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(16, 185, 129, 0.4);
}

/* ── Hero Spotlight ── */
.hero-spotlight {
  padding: 60px 0 40px;
}

.spotlight-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.95) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 50px var(--primary-glow);
}

.spotlight-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  color: var(--primary-light);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 20px;
}

.spotlight-title {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.spotlight-desc {
  color: var(--text-muted);
  font-size: 16px;
  margin-bottom: 28px;
  line-height: 1.6;
}

.spotlight-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-emerald {
  background: linear-gradient(135deg, var(--primary) 0%, #059669 100%);
  color: #022c22;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-weight: 700;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-emerald:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.4);
}

.btn-glass {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  padding: 14px 24px;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border-subtle);
  transition: var(--transition);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.spotlight-visual {
  background: #0f172a;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.visual-header {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid #334155;
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.visual-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.visual-stat-box {
  background: #1e293b;
  padding: 14px;
  border-radius: 8px;
  border: 1px solid #334155;
}

/* ── Section Structure ── */
.section {
  padding: 60px 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 20px;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 15px;
  margin-top: 6px;
}

/* ── Category Filters ── */
.category-filter-bar {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 10px;
  margin-bottom: 30px;
}

.category-pill {
  padding: 8px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.category-pill.active, .category-pill:hover {
  background: var(--primary);
  color: #022c22;
  border-color: var(--primary);
}

/* ── Blog Grid ── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 28px;
}

.blog-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.blog-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.card-header-art {
  height: 160px;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  position: relative;
}

.art-pos { background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(99, 102, 241, 0.2) 100%); }
.art-printer { background: linear-gradient(135deg, rgba(6, 182, 212, 0.2) 0%, rgba(16, 185, 129, 0.2) 100%); }
.art-business { background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(239, 68, 68, 0.2) 100%); }
.art-sqlite { background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(217, 70, 239, 0.2) 100%); }

.card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 12px;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(6px);
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  color: var(--primary-light);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.card-meta {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.card-title {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.35;
  color: var(--text-main);
}

.card-summary {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.card-link {
  color: var(--primary-light);
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.card-link:hover {
  color: var(--primary);
  transform: translateX(4px);
}

/* ── Backlink Hub Section ── */
.hub-section {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 70px 0;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.hub-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  display: block;
}

.hub-box:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-highlight);
  transform: translateY(-3px);
}

.hub-box h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--primary-light);
}

.hub-box p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ── Modal Article Reader ── */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(12px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: #0f172a;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  max-width: 760px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 36px;
  position: relative;
  box-shadow: 0 25px 70px rgba(0,0,0,0.8);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255,255,255,0.08);
  border: none;
  color: white;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-body {
  color: #cbd5e1;
  font-size: 15px;
  line-height: 1.7;
}

.modal-body h2 {
  color: white;
  font-size: 26px;
  margin-bottom: 12px;
}

.modal-body h3 {
  color: var(--primary-light);
  font-size: 18px;
  margin: 20px 0 8px;
}

.modal-body p {
  margin-bottom: 16px;
}

.modal-body a {
  color: var(--primary-light);
  font-weight: 700;
  text-decoration: underline;
}

/* ── Footer ── */
.footer {
  padding: 60px 0 30px;
  border-top: 1px solid var(--border-subtle);
  background: #060911;
  color: var(--text-dim);
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h5 {
  color: var(--text-main);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 850px) {
  .spotlight-card { grid-template-columns: 1fr; padding: 32px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .nav-links { display: none; }
}