/* ═══════════════════════════════════════════════════════
   ADB Pro — Documentation Site Theme & Components
   ═══════════════════════════════════════════════════════ */

/* ── Theme Variables ───────────────────────────────── */
:root {
  --bg-body: #ffffff;
  --bg-elevated: #f8fafc;
  --bg-card: #ffffff;
  --bg-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f3460 100%);
  --bg-code: #f1f5f9;
  --bg-nav: rgba(255,255,255,0.85);
  --bg-footer: #f8fafc;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-soft: #dbeafe;
  --success: #10b981;
  --success-soft: #d1fae5;
  --warning: #f59e0b;
  --warning-soft: #fef3c7;
  --purple: #8b5cf6;
  --purple-soft: #ede9fe;
  --radius: 12px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 50px -12px rgba(0,0,0,0.15);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

[data-theme="dark"] {
  --bg-body: #0b1120;
  --bg-elevated: #111827;
  --bg-card: #1e293b;
  --bg-hero: linear-gradient(135deg, #020617 0%, #0b1120 50%, #0f172a 100%);
  --bg-code: #1e293b;
  --bg-nav: rgba(11,17,32,0.88);
  --bg-footer: #111827;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: #1e293b;
  --accent-soft: rgba(59,130,246,0.15);
  --success-soft: rgba(16,185,129,0.15);
  --warning-soft: rgba(245,158,11,0.15);
  --purple-soft: rgba(139,92,246,0.15);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.5), 0 4px 6px -4px rgba(0,0,0,0.4);
  --shadow-xl: 0 20px 50px -12px rgba(0,0,0,0.6);
}

/* ── Base ──────────────────────────────────────────── */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font-sans);
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.3s, color 0.3s;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-hover); }

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

/* ── Navigation ────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: var(--bg-nav);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s, border-color 0.3s;
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text-primary);
  text-decoration: none;
}
.nav-brand-icon {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 14px;
}
.nav-brand-logo {
  width: 32px; height: 32px;
  min-width: 32px; max-width: 32px;
  min-height: 32px; max-height: 32px;
  border-radius: 6px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.nav-links a {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: all 0.2s;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--accent-soft);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-toggle {
  display: none;
  background: none; border: none;
  color: var(--text-primary);
  cursor: pointer; padding: 8px;
  border-radius: 8px;
}
.nav-toggle:hover { background: var(--accent-soft); }

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed; top: 64px; left: 0; right: 0; bottom: 0;
  background: var(--bg-body);
  padding: 24px;
  z-index: 99;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  display: block;
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 10px;
  transition: all 0.2s;
}
.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--text-primary);
  background: var(--accent-soft);
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
}

/* ── Theme Toggle ──────────────────────────────────── */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s;
}
.theme-toggle:hover {
  color: var(--text-primary);
  background: var(--accent-soft);
  border-color: var(--accent);
}
.theme-toggle .icon-sun,
.theme-toggle .icon-moon { width: 18px; height: 18px; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

/* ── Buttons ───────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  line-height: 1;
}
.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
  box-shadow: 0 2px 8px rgba(59,130,246,0.3);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff;
  box-shadow: 0 4px 16px rgba(59,130,246,0.4);
  transform: translateY(-1px);
}
.btn-secondary {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.3);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.5);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}
.btn-outline:hover {
  background: var(--accent-soft);
}
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-lg { padding: 14px 32px; font-size: 16px; }

/* ── Hero ──────────────────────────────────────────── */
.hero {
  background: var(--bg-hero);
  padding: 80px 24px 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(59,130,246,0.15) 0%, transparent 60%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(59,130,246,0.15);
  border: 1px solid rgba(59,130,246,0.25);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: #60a5fa;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero h1 span {
  background: linear-gradient(135deg, #60a5fa, #a78bfa, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 18px;
  color: #94a3b8;
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Sections ──────────────────────────────────────── */
.section {
  padding: 80px 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header h2 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ── Feature Cards ─────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all 0.3s;
  text-decoration: none;
  color: inherit;
  display: block;
}
.feature-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  color: inherit;
}
.feature-card-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.feature-card .card-arrow {
  margin-top: 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  display: flex; align-items: center; gap: 4px;
  opacity: 0;
  transition: opacity 0.2s;
}
.feature-card:hover .card-arrow { opacity: 1; }

/* Icon backgrounds */
.icon-blue { background: var(--accent-soft); color: #3b82f6; }
.icon-green { background: var(--success-soft); color: #10b981; }
.icon-amber { background: var(--warning-soft); color: #f59e0b; }
.icon-purple { background: var(--purple-soft); color: #8b5cf6; }

/* ── Stats ─────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
  text-align: center;
  padding: 48px 0;
}
.stat-value {
  font-size: 40px;
  font-weight: 800;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ── Code Block ────────────────────────────────────── */
.code-block {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: var(--radius);
  padding: 20px 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  overflow-x: auto;
  position: relative;
}
.code-block .comment { color: #64748b; }
.code-block .keyword { color: #7dd3fc; }
.code-block .string { color: #86efac; }
.code-block .flag { color: #c4b5fd; }
.code-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.code-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}

/* ── Pricing Cards ─────────────────────────────────── */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  transition: all 0.3s;
  position: relative;
}
.pricing-card.featured {
  border-color: var(--accent);
  box-shadow: var(--shadow-xl), 0 0 0 1px var(--accent);
}
.pricing-card.featured::before {
  content: 'Most Popular';
  position: absolute;
  top: -12px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
  padding: 4px 16px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
}
.pricing-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}
.pricing-price {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 16px 0;
}
.pricing-price span {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-muted);
}
.pricing-features {
  list-style: none;
  text-align: left;
  margin: 24px 0;
  font-size: 14px;
}
.pricing-features li {
  padding: 8px 0;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: var(--text-secondary);
}
.pricing-features .check {
  color: var(--success);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}
.pricing-features .cross {
  color: var(--text-muted);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ── Step Cards (Getting Started) ──────────────────── */
.steps {
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.step {
  counter-increment: step;
  display: flex;
  gap: 24px;
  align-items: flex-start;
}
.step-number {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  font-weight: 800;
  flex-shrink: 0;
}
.step-number::before { content: counter(step); }
.step-content h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-content p {
  font-size: 15px;
  color: var(--text-secondary);
}

/* ── Badges ────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.badge-blue { background: var(--accent-soft); color: #3b82f6; }
.badge-green { background: var(--success-soft); color: #10b981; }
.badge-amber { background: var(--warning-soft); color: #f59e0b; }
.badge-purple { background: var(--purple-soft); color: #8b5cf6; }
.badge-gray { background: var(--bg-elevated); color: var(--text-muted); }

/* ── Feature Detail Page ───────────────────────────── */
.feature-hero {
  background: var(--bg-hero);
  padding: 60px 24px 80px;
  text-align: center;
}
.feature-hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}
.feature-hero p {
  font-size: 17px;
  color: #94a3b8;
  max-width: 560px;
  margin: 0 auto;
}
.feature-section {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 24px;
}
.feature-section h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}
.feature-section h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 24px 0 12px;
}
.feature-section p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.feature-section ul {
  list-style: none;
  margin-bottom: 16px;
}
.feature-section ul li {
  padding: 6px 0;
  font-size: 15px;
  color: var(--text-secondary);
  padding-left: 20px;
  position: relative;
}
.feature-section ul li::before {
  content: '';
  position: absolute;
  left: 0; top: 14px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.feature-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ── CTA Banner ────────────────────────────────────── */
.cta-banner {
  background: var(--bg-hero);
  padding: 80px 24px;
  text-align: center;
}
.cta-banner h2 {
  font-size: 32px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}
.cta-banner p {
  font-size: 16px;
  color: #94a3b8;
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto; margin-right: auto;
}

/* ── Footer ────────────────────────────────────────── */
.site-footer {
  background: var(--bg-footer);
  border-top: 1px solid var(--border);
  padding: 48px 24px;
  transition: background 0.3s, border-color 0.3s;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
  flex-wrap: wrap;
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
  max-width: 280px;
}
.footer-links {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}
.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 4px 0;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--text-primary); }
.footer-bottom {
  max-width: 1200px;
  margin: 32px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

/* ── Comparison Table ──────────────────────────────── */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 24px 0;
}
.comparison-table th,
.comparison-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.comparison-table th {
  background: var(--bg-elevated);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}
.comparison-table tr:hover td {
  background: var(--bg-elevated);
}
.comparison-table td a[href$=".txt"]:hover strong {
  color: var(--accent);
  text-decoration: underline;
}
.comparison-table td a[href$=".txt"] {
  transition: color 0.15s ease;
}

/* ── Responsive ────────────────────────────────────── */
@media (max-width: 640px) {
  .hero { padding: 48px 16px 64px; }
  .section { padding: 48px 16px; }
  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .step { flex-direction: column; gap: 12px; }
  .footer-inner { flex-direction: column; gap: 32px; }
  .footer-links { gap: 32px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-value { font-size: 28px; }
}

/* ── Utilities ─────────────────────────────────────── */
.text-gradient {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-center { text-align: center; }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-8 { margin-bottom: 32px; }

/* ── Inline SVG Icon helpers ───────────────────────── */
.icon { display: inline-block; vertical-align: middle; }