/* ═══════════════════════════════════════════════════
   A3KM Studio — Portfolio Guide Shared CSS
   Version: 2.0.0 | March 2026
   Applies to all pages under Documentation/
═══════════════════════════════════════════════════ */

/* ─── Reset & Root ─────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  /* Brand colors */
  --red:           #CC0000;
  --red-dark:      #8B0000;
  --red-deep:      #5a0000;
  --red-glow:      rgba(204, 0, 0, 0.4);
  --red-glow-sm:   rgba(204, 0, 0, 0.15);
  --red-border:    rgba(204, 0, 0, 0.30);
  --red-border-md: rgba(204, 0, 0, 0.55);
  --red-border-lg: rgba(204, 0, 0, 0.80);

  /* Backgrounds */
  --bg-void:   #000000;
  --bg-dark:   #050000;
  --bg-warm:   #0a0000;
  --bg-card:   rgba(8, 0, 0, 0.96);
  --bg-card-h: rgba(18, 0, 0, 0.92);
  --bg-glass:  rgba(255, 255, 255, 0.03);

  /* Text */
  --txt-white:  #FFFFFF;
  --txt-bright: rgba(255, 255, 255, 0.92);
  --txt-mid:    rgba(255, 255, 255, 0.70);
  --txt-dim:    rgba(255, 255, 255, 0.45);
  --txt-ghost:  rgba(255, 255, 255, 0.20);

  /* Typography */
  --font-main:    'Inter', sans-serif;
  --font-display: 'Sora', sans-serif;
  --font-num:     'Rajdhani', sans-serif;
  --font-bn:      'Noto Sans Bengali', 'Inter', sans-serif;

  /* Layout */
  --container: 1280px;
  --container-wide: 1440px;
  --space-inline: clamp(18px, 3.4vw, 40px);

  /* Shadows */
  --shadow-card:  0 4px 24px rgba(0,0,0,0.7), 0 1px 4px rgba(204,0,0,0.08);
  --shadow-hover: 0 12px 48px rgba(204,0,0,0.28), 0 6px 24px rgba(0,0,0,0.8);
  --shadow-glow:  0 0 40px rgba(204,0,0,0.35), 0 0 80px rgba(204,0,0,0.12);

  /* Spacing */
  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  /* Transitions */
  --ease:   cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast: 150ms;
  --t-mid:  280ms;
  --t-slow: 450ms;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background: var(--bg-void);
  color: var(--txt-bright);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-top: 85px; /* Fixed desktop navbar height */
}

.bn,
[lang="bn"] {
  font-family: var(--font-bn);
}

/* ─── Remove g-nav leftover (replaced by desktop-navbar) ─── */
.g-nav { display: none !important; }

/* ─── Animated Engineering Grid Background ──────── */
.guide-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.guide-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(204,0,0,0.055) 1px, transparent 1px),
    linear-gradient(0deg,  rgba(204,0,0,0.055) 1px, transparent 1px);
  background-size: 48px 48px;
  animation: gridDrift 28s linear infinite;
}
.guide-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 20% 10%,  rgba(140,0,0,0.18) 0%, transparent 60%),
    radial-gradient(ellipse 50% 35% at 80% 85%,  rgba(100,0,0,0.14) 0%, transparent 60%),
    radial-gradient(ellipse 80% 60% at 50% 50%,  rgba(0,0,0,0.70)  0%, transparent 100%);
}

@keyframes gridDrift {
  from { background-position: 0 0; }
  to   { background-position: 48px 48px; }
}

/* Scan line sweep */
.guide-bg .scan-line {
  position: absolute;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(204,0,0,0.35), transparent);
  animation: scanSweep 8s ease-in-out infinite;
  opacity: 0;
}
@keyframes scanSweep {
  0%   { top: -2%; opacity: 0; }
  5%   { opacity: 1; }
  95%  { opacity: 1; }
  100% { top: 102%; opacity: 0; }
}

.guide-content { position: relative; z-index: 1; }

/* ─── Guide Navbar (Back navigation for sub-pages) */
.guide-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0,0,0,0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--red-border);
  height: 60px;
  display: flex;
  align-items: center;
  padding: 0 32px;
  gap: 16px;
}
.guide-nav-back {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--txt-mid);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 6px 14px 6px 8px;
  border-radius: var(--radius-sm);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.guide-nav-back:hover { color: var(--red); background: var(--red-glow-sm); }
.guide-nav-back i { font-size: 0.85rem; transition: transform var(--t-fast) var(--ease); }
.guide-nav-back:hover i { transform: translateX(-3px); }

.guide-nav-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--txt-dim);
}
.guide-nav-breadcrumb .sep { color: var(--txt-ghost); }
.guide-nav-breadcrumb .current { color: var(--txt-mid); font-weight: 500; }

/* ─── Section Heading ───────────────────────────── */
.guide-section {
  padding: 60px 0;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--space-inline);
  padding-right: var(--space-inline);
}

.guide-section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 12px;
}
.guide-section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--red);
  border-radius: 1px;
}

.guide-section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  color: var(--txt-white);
  line-height: 1.2;
  margin-bottom: 12px;
}
.guide-section-title span { color: var(--red); }

.guide-section-subtitle {
  font-size: 1rem;
  color: var(--txt-mid);
  max-width: 580px;
  line-height: 1.7;
  margin-left: auto;
  margin-right: auto;
}

/* ─── Feature List ──────────────────────────────── */
.feature-list {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--red-border);
  border-radius: var(--radius-md);
  transition: border-color var(--t-mid) var(--ease), background var(--t-mid) var(--ease), transform var(--t-mid) var(--ease-spring);
}
.feature-item:hover {
  border-color: var(--red-border-md);
  background: var(--bg-card-h);
  transform: translateX(6px);
}

.feature-item-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(204,0,0,0.1);
  border: 1px solid var(--red-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--red);
  flex-shrink: 0;
  transition: background var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease);
}
.feature-item:hover .feature-item-icon {
  background: rgba(204,0,0,0.2);
  border-color: var(--red-border-lg);
}

.feature-item-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--txt-bright);
  margin-bottom: 3px;
}
.feature-item-desc {
  font-size: 0.8rem;
  color: var(--txt-dim);
  line-height: 1.5;
}

/* ─── Feature Badges ────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid;
}
.badge-red    { color: #ff6b6b; border-color: rgba(255,107,107,0.35); background: rgba(255,107,107,0.08); }
.badge-green  { color: #51cf66; border-color: rgba(81,207,102,0.35);  background: rgba(81,207,102,0.08); }
.badge-blue   { color: #74c0fc; border-color: rgba(116,192,252,0.35); background: rgba(116,192,252,0.08); }
.badge-orange { color: #ffa94d; border-color: rgba(255,169,77,0.35);  background: rgba(255,169,77,0.08); }
.badge-purple { color: #cc5de8; border-color: rgba(204,93,232,0.35);  background: rgba(204,93,232,0.08); }
.badge-white  { color: #dee2e6; border-color: rgba(222,226,230,0.25); background: rgba(222,226,230,0.05); }

/* ─── Info Table ────────────────────────────────── */
.guide-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--red-border);
  margin-top: 20px;
}
.guide-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.855rem;
}
.guide-table thead tr {
  background: rgba(204,0,0,0.12);
  border-bottom: 1px solid var(--red-border-md);
}
.guide-table th {
  padding: 12px 18px;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--red);
  white-space: nowrap;
}
.guide-table td {
  padding: 12px 18px;
  color: var(--txt-mid);
  border-bottom: 1px solid rgba(204,0,0,0.1);
  vertical-align: top;
}
.guide-table tbody tr:last-child td { border-bottom: none; }
.guide-table tbody tr:hover td { background: rgba(204,0,0,0.05); color: var(--txt-bright); }
.guide-table td strong { color: var(--txt-bright); font-weight: 600; }
.guide-table td code {
  font-family: 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.78rem;
  background: rgba(204,0,0,0.1);
  color: rgba(255,120,120,0.9);
  padding: 2px 7px;
  border-radius: 4px;
}

/* ─── CSS Page Mockup / Wireframe ───────────────── */
.page-mockup {
  background: rgba(5,0,0,0.9);
  border: 1px solid var(--red-border-md);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease);
}
.page-mockup:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--red-border-lg);
}

/* Browser chrome bar */
.mockup-chrome {
  height: 32px;
  background: rgba(204,0,0,0.12);
  border-bottom: 1px solid var(--red-border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 6px;
}
.mockup-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
}
.mockup-dot-r { background: rgba(255,87,87,0.7); }
.mockup-dot-y { background: rgba(255,190,50,0.5); }
.mockup-dot-g { background: rgba(80,200,120,0.5); }
.mockup-url {
  flex: 1;
  margin: 0 10px;
  height: 16px;
  background: rgba(255,255,255,0.06);
  border-radius: 4px;
  max-width: 220px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  font-size: 0.62rem;
  color: var(--txt-dim);
  overflow: hidden;
  white-space: nowrap;
}

/* Mockup body */
.mockup-body { padding: 0; }

/* Section strips inside mockup */
.mockup-section {
  height: 36px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-bottom: 1px solid rgba(204,0,0,0.08);
  position: relative;
  overflow: hidden;
  cursor: default;
  transition: background var(--t-fast) var(--ease);
}
.mockup-section:hover { background: rgba(204,0,0,0.06); }
.mockup-section::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  border-radius: 0 2px 2px 0;
}

/* Color variants */
.mockup-s-navbar  { background: rgba(204,0,0,0.14); color: rgba(255,100,100,0.9); }
.mockup-s-navbar::before  { background: #cc0000; }
.mockup-s-hero    { background: rgba(0,0,0,0.6); color: var(--txt-mid); min-height: 60px; height: 60px; }
.mockup-s-hero::before    { background: rgba(255,255,255,0.3); }
.mockup-s-section { background: rgba(255,255,255,0.02); color: var(--txt-dim); }
.mockup-s-section::before { background: rgba(255,255,255,0.2); }
.mockup-s-card    { background: rgba(204,0,0,0.06); color: var(--txt-dim); }
.mockup-s-card::before    { background: rgba(204,0,0,0.5); }
.mockup-s-footer  { background: rgba(0,0,0,0.5); color: var(--txt-ghost); }
.mockup-s-footer::before  { background: rgba(255,255,255,0.1); }

/* Cards row inside mockup */
.mockup-cards-row {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  background: rgba(0,0,0,0.4);
  border-bottom: 1px solid rgba(204,0,0,0.08);
}
.mockup-card-mini {
  flex: 1;
  height: 40px;
  background: rgba(204,0,0,0.08);
  border: 1px solid rgba(204,0,0,0.2);
  border-radius: 4px;
}

/* ─── Data Flow Diagram ─────────────────────────── */
.flow-diagram {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  padding: 20px 0;
  -webkit-overflow-scrolling: touch;
}
.flow-node {
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--red-border);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  text-align: center;
  min-width: 110px;
  transition: border-color var(--t-mid) var(--ease), background var(--t-mid) var(--ease);
}
.flow-node:hover { border-color: var(--red-border-md); background: var(--bg-card-h); }
.flow-node-icon { font-size: 1.2rem; margin-bottom: 4px; }
.flow-node-label { font-size: 0.7rem; font-weight: 600; color: var(--txt-mid); }
.flow-node-sub   { font-size: 0.62rem; color: var(--txt-ghost); margin-top: 2px; }

.flow-node-highlight {
  border-color: var(--red-border-md);
  background: rgba(204,0,0,0.1);
}
.flow-node-highlight .flow-node-label { color: rgba(255,120,120,0.9); }

.flow-arrow {
  flex-shrink: 0;
  width: 36px;
  height: 2px;
  background: linear-gradient(90deg, var(--red-border), var(--red-border-md));
  position: relative;
}
.flow-arrow::after {
  content: '';
  position: absolute;
  right: -1px;
  top: 50%;
  transform: translateY(-50%);
  border: 5px solid transparent;
  border-left-color: rgba(204,0,0,0.55);
}

/* ─── Stats Row ─────────────────────────────────── */
.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.stat-card {
  flex: 1;
  min-width: 140px;
  background: var(--bg-card);
  border: 1px solid var(--red-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  text-align: center;
  transition: border-color var(--t-mid) var(--ease), transform var(--t-mid) var(--ease-spring), box-shadow var(--t-mid) var(--ease);
}
.stat-card:hover {
  border-color: var(--red-border-md);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(204,0,0,0.15);
}
.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--red);
  line-height: 1;
  font-family: var(--font-display), var(--font-main);
}
.stat-label {
  font-size: 0.78rem;
  color: var(--txt-dim);
  margin-top: 5px;
  font-weight: 500;
}

/* ─── Divider ───────────────────────────────────── */
.guide-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--red-border), transparent);
  margin: 48px 0;
}

/* ─── Scrollbar ─────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: #0a0000; }
::-webkit-scrollbar-thumb { background: rgba(204,0,0,0.5); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(204,0,0,0.8); }

/* ─── Utility ───────────────────────────────────── */
.highlight { color: var(--red); }
.text-dim { color: var(--txt-dim); }
.text-mid { color: var(--txt-mid); }
.no-select { user-select: none; }

/* ─── Scroll-reveal animation ───────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ─── Footer ────────────────────────────────────── */
.guide-footer {
  border-top: 1px solid var(--red-border);
  padding: 32px;
  text-align: center;
  position: relative;
  z-index: 1;
}
.guide-footer-text {
  font-size: 0.78rem;
  color: var(--txt-ghost);
}
.guide-footer-text a {
  color: var(--txt-dim);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}
.guide-footer-text a:hover { color: var(--red); }

/* ─── WG Universal Footer ─────────────────────── */
.wg-footer {
  position: relative;
  margin: 90px auto 0;
  max-width: var(--container-wide);
  border-radius: 22px;
  padding: 62px 42px 48px;
  text-align: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% -15%, rgba(255,56,56,0.2), rgba(255,56,56,0) 46%),
    linear-gradient(145deg, rgba(36,11,11,0.97) 0%, rgba(20,6,6,0.98) 52%, rgba(10,2,2,0.99) 100%);
  border: 1px solid rgba(255,60,60,0.2);
  box-shadow: 0 -10px 42px rgba(0,0,0,0.52), 0 16px 44px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,72,72,0.07), inset 0 1px 0 rgba(255,106,106,0.28), inset 0 -30px 60px rgba(140,0,0,0.12);
}
.wg-footer::before {
  content: '';
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: min(240px, 46%); height: 3px;
  background: linear-gradient(90deg, rgba(255,78,78,0), rgba(255,68,68,0.95), rgba(255,78,78,0));
  border-radius: 999px;
  box-shadow: 0 0 22px rgba(255,48,48,0.5);
}
.wg-footer::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(120deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0) 32%),
    repeating-linear-gradient(90deg, rgba(255,0,0,0.03) 0px, rgba(255,0,0,0.03) 1px, transparent 1px, transparent 72px);
  mix-blend-mode: screen;
  opacity: 0.4;
}
.wg-footer-inner { max-width: 740px; margin: 0 auto; position: relative; z-index: 1; }
.wg-qwrap { position: relative; padding: 0 20px; margin-bottom: 30px; }
.wg-qmark {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: clamp(4rem, 8vw, 5.7rem); line-height: 0.62;
  color: rgba(255,52,52,0.48);
  display: block; margin-bottom: 12px;
  user-select: none; letter-spacing: -4px;
  text-shadow: 0 8px 20px rgba(204,0,0,0.34);
}
.wg-qtext {
  font-size: clamp(0.84rem, 1.5vw, 0.95rem); font-style: italic;
  color: #f0dcdc; line-height: 1.85;
  margin: 0 0 12px; font-family: var(--font-main);
}
.wg-qsrc {
  display: inline-block; font-size: 0.68rem; font-weight: 700;
  color: rgba(255,80,80,0.9); letter-spacing: 0.1em;
  text-transform: uppercase; font-style: normal;
}
.wg-divider {
  width: min(190px, 42%); height: 1px;
  background: linear-gradient(90deg, rgba(255,80,80,0), rgba(255,80,80,0.72), rgba(255,80,80,0));
  margin: 0 auto 24px;
}
.wg-copy { font-size: 0.73rem; color: #cfafaf; line-height: 1.9; }
.wg-copy strong { color: #f0d2d2; font-weight: 600; }
.wg-copy a { color: #ff8585; text-decoration: none; transition: color .2s ease; }
.wg-copy a:hover { color: #ffb4b4; }
.wg-tagline {
  display: block; font-size: 0.67rem;
  color: #b99797; letter-spacing: 0.04em; margin-top: 5px;
}
@media (max-width: 600px) {
  .wg-footer { margin: 66px 12px 0; padding: 42px 20px 34px; border-radius: 16px; }
  .wg-qtext { font-size: 0.82rem; }
}

/* ─── Desktop Responsive ────────────────────────── */
@media (max-width: 900px) {
  .guide-section { padding: 40px 20px; }
  .guide-nav { padding: 0 20px; }
  .stats-row { gap: 10px; }
}
@media (max-width: 600px) {
  .guide-section { padding: 32px 16px; }
  .guide-section-title { font-size: 1.4rem; }
  .flow-diagram { gap: 0; }
}

@media (min-width: 1440px) {
  :root {
    --space-inline: clamp(34px, 4.2vw, 72px);
  }
  .guide-section-title {
    font-size: clamp(2rem, 2.7vw, 2.9rem);
  }
  .guide-section-subtitle {
    max-width: 700px;
    font-size: 1.03rem;
  }
  .wg-footer {
    padding: 68px 56px 52px;
  }
}

@media (min-width: 1920px) {
  :root {
    --space-inline: clamp(56px, 5vw, 110px);
    --container: 1360px;
    --container-wide: 1560px;
  }
  .guide-section-subtitle {
    max-width: 760px;
    font-size: 1.08rem;
  }
  .wg-footer {
    margin-top: 104px;
  }
}

/* ════════════════════════════════════════════════════
   GUIDE NAVBAR  (.g-nav)
   Tiers: data-mode="fixed" | data-mode="autohide"
   Tier 3 (feature pages) — no navbar, existing topbar only
════════════════════════════════════════════════════ */
.g-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10000;
  height: 70px;
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border-bottom: 1px solid rgba(204,0,0,0.18);
  transform: translateY(0);
  transition: transform 0.36s cubic-bezier(.4,0,.2,1),
              background 0.3s ease;
  will-change: transform;
  animation: gNavSlideDown 0.5s 0.08s cubic-bezier(.34,1.2,.64,1) both;
}

@keyframes gNavSlideDown {
  from { transform: translateY(-100%); opacity: 0; }
  to   { transform: translateY(0);     opacity: 1; }
}

/* Bottom grid-dot rule */
.g-nav::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background-image: repeating-linear-gradient(
    90deg, transparent, transparent 10px,
    rgba(204,0,0,0.2) 10px, rgba(204,0,0,0.2) 11px
  );
  pointer-events: none;
}

.g-nav.scrolled       { background: rgba(0,0,0,0.97); }
.g-nav.g-nav-hidden   { transform: translateY(-100%); pointer-events: none; }

/* ─── Inner Container ─── */
.g-nav-inner {
  max-width: 1600px;
  height: 100%;
  margin: 0 auto;
  padding: 0 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ─── Logo ─── */
.g-nav-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  flex-shrink: 0;
  transition: transform 0.28s ease;
}
.g-nav-logo:hover { transform: translateY(-2px) scale(1.02); }

.g-nav-logo-img {
  width: 48px; height: 48px;
  transition: transform 0.3s ease;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}
.g-nav-logo:hover .g-nav-logo-img { 
  transform: scale(1.08);
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.4));
}

.g-nav-brand { display: flex; flex-direction: column; line-height: 1; }

.g-nav-brand-name {
  font-family: var(--font-num);
  font-size: 1.3rem; font-weight: 900;
  background: linear-gradient(135deg, #ffffff 55%, rgba(204,0,0,0.7));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.04em;
}

.g-nav-brand-sub {
  font-size: 0.6rem; font-weight: 700;
  color: #CC0000;
  text-transform: uppercase;
  letter-spacing: 0.17em;
  margin-top: 2px;
}

/* ─── Nav Links ─── */
.g-nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0; padding: 0;
}

.g-nav-link {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: 12px;
  font-size: 0.83rem; font-weight: 600;
  color: rgba(255,255,255,0.62);
  text-decoration: none;
  white-space: nowrap;
  position: relative; overflow: hidden;
  transition: color .22s ease,
              background .22s ease,
              transform .2s ease;
}
.g-nav-link::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg,
    transparent, rgba(255,255,255,0.06), transparent);
  transform: translateX(-110%) skewX(-20deg);
  transition: transform 0.52s ease;
  pointer-events: none;
}
.g-nav-link:hover::before { transform: translateX(110%) skewX(-20deg); }
.g-nav-link:hover {
  color: #ffffff;
  background: rgba(204,0,0,0.12);
  transform: translateY(-2px);
}

.g-nav-link i { font-size: 0.82rem; width: 15px; text-align: center; }

.g-nav-link.active {
  background: rgba(204,0,0,0.88);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(204,0,0,0.38), inset 0 1px 0 rgba(255,255,255,0.12);
}
.g-nav-link.active:hover {
  background: rgba(220,0,0,0.92);
  transform: translateY(-2px);
}
.g-nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0; left: 20%; right: 20%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.8), transparent);
  border-radius: 2px;
}

/* ─── Body padding when navbar present ─── */
body.has-g-nav { padding-top: 70px; }

/* ─── Responsive ─── */
@media (max-width: 1100px) {
  .g-nav-inner { padding: 0 28px; }
  .g-nav-link { padding: 9px 13px; font-size: 0.8rem; }
  .g-nav-brand-name { font-size: 1.1rem; }
}
@media (max-width: 900px) {
  .g-nav-link span { display: none; }
  .g-nav-link { padding: 9px 11px; }
}
@media (max-width: 768px) {
  .g-nav { display: none !important; }
  body.has-g-nav { padding-top: 0; }
}

/* ════════════════════════════════════════════════════
   MOBILE NAV  (.m-nav)
   Shown ONLY on ≤768px — replaces hidden g-nav
════════════════════════════════════════════════════ */
.m-nav {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10001;
  height: 52px;
  background: rgba(0,0,0,0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(204,0,0,0.22);
  align-items: center;
  padding: 0 14px;
  gap: 10px;
}
@media (max-width: 768px) {
  .m-nav { display: flex; }
}

/* When main site navbar is present, place guide mobile nav as a secondary row below it. */
@media (max-width: 768px) {
  body.guide-stack-nav {
    padding-top: 118px;
  }

  body.guide-stack-nav .m-nav {
    top: 58px;
  }

  body.guide-stack-nav .m-drawer {
    top: 110px;
  }

  body.guide-stack-nav .m-drawer-overlay {
    top: 58px;
  }
}

.m-nav-logo {
  display: flex; align-items: center; gap: 8px;
  text-decoration: none; flex: 1; min-width: 0;
}
.m-nav-logo-img {
  width: 32px; height: 32px;
  flex-shrink: 0;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
}
.m-nav-brand { display: flex; flex-direction: column; line-height: 1; min-width: 0; }
.m-nav-brand-name {
  font-family: var(--font-num);
  font-size: 1rem; font-weight: 900;
  color: #fff;
  letter-spacing: 0.04em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.m-nav-brand-sub {
  font-size: 0.52rem; font-weight: 700;
  color: #CC0000;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin-top: 1px;
}

/* Hamburger / menu icon area */
.m-nav-menu {
  display: flex; align-items: center; gap: 6px;
  flex-shrink: 0;
}
.m-nav-btn {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border-radius: 10px;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  font-size: 0.82rem;
  border: 1px solid rgba(204,0,0,0.18);
  background: rgba(204,0,0,0.06);
  transition: all .2s;
  position: relative;
}
.m-nav-btn:hover, .m-nav-btn:active {
  color: #fff;
  background: rgba(204,0,0,0.16);
  border-color: rgba(204,0,0,0.4);
}
.m-nav-btn:focus-visible {
  outline: 2px solid rgba(255,140,140,0.85);
  outline-offset: 2px;
}
.m-nav-btn.active-page {
  color: #fff;
  background: rgba(204,0,0,0.8);
  border-color: rgba(204,0,0,0.9);
}

/* Mobile nav drawer */
.m-drawer {
  display: none;
  position: fixed;
  top: 52px; left: 0; right: 0;
  z-index: 10000;
  background: rgba(3,0,0,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(204,0,0,0.25);
  padding: 12px 14px 16px;
  transform: translateY(-12px);
  opacity: 0;
  transition: transform .25s cubic-bezier(.4,0,.2,1), opacity .22s ease;
}
.m-drawer.open {
  display: block;
  animation: mDrawerIn .25s cubic-bezier(.34,1.2,.64,1) forwards;
}
@keyframes mDrawerIn {
  from { transform: translateY(-12px); opacity: 0; }
  to   { transform: translateY(0);     opacity: 1; }
}

.m-drawer-group + .m-drawer-group {
  margin-top: 12px;
}

.m-drawer-group-title {
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255,130,130,0.72);
  margin: 0 2px 8px;
}

.m-drawer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.m-drawer-link {
  display: flex; align-items: center; gap: 9px;
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 0.82rem; font-weight: 600;
  color: rgba(255,255,255,0.62);
  text-decoration: none;
  background: rgba(204,0,0,0.05);
  border: 1px solid rgba(204,0,0,0.15);
  transition: all .2s;
}
.m-drawer-link:active {
  background: rgba(204,0,0,0.15);
  color: #fff;
}
.m-drawer-link:focus-visible {
  outline: 2px solid rgba(255,140,140,0.85);
  outline-offset: 1px;
}
.m-drawer-link.active {
  background: rgba(204,0,0,0.85);
  color: #fff;
  border-color: rgba(204,0,0,0.9);
}
.m-drawer-link.is-primary {
  border-color: rgba(204,0,0,0.28);
  background: rgba(204,0,0,0.08);
}
.m-drawer-link i { font-size: 0.85rem; width: 16px; text-align: center; color: #CC0000; }
.m-drawer-link.active i { color: rgba(255,200,200,0.9); }
.m-drawer-link span { flex: 1; }

.m-drawer-overlay {
  display: none;
  position: fixed; inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.5);
}
.m-drawer-overlay.open { display: block; }

/* Lock page scroll while drawer is open. */
body.m-drawer-open {
  overflow: hidden;
  touch-action: none;
}

/* ════════════════════════════════════════════════════
   MOBILE BOTTOM NAV — shown ≤768px on Documentation pages
   Mirrors the main website mobile-bottom-nav
════════════════════════════════════════════════════ */
.doc-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 65px;
  z-index: 10000;
  background: rgba(10,10,10,0.98);
  border-top: 2px solid rgba(204,0,0,0.3);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.5), 0 -2px 8px rgba(204,0,0,0.2);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.doc-bottom-nav::before {
  content:''; position:absolute; inset:0;
  background-image: linear-gradient(90deg,rgba(204,0,0,.03) 1px,transparent 1px),linear-gradient(0deg,rgba(204,0,0,.03) 1px,transparent 1px);
  background-size: 20px 20px; pointer-events:none; opacity:.5;
}
.doc-nav-container {
  display: flex; align-items: center; justify-content: space-around;
  height: 65px; max-width: 600px; margin: 0 auto; padding: 0 8px;
}
.doc-nav-item {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 4px; padding: 8px 4px;
  text-decoration: none; color: rgba(255,255,255,0.45);
  transition: all .3s cubic-bezier(.4,0,.2,1);
  position: relative; min-width: 50px;
}
.doc-nav-item i { font-size: 22px; transition: all .3s cubic-bezier(.4,0,.2,1); }
.doc-nav-item span { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; white-space: nowrap; }
.doc-nav-item.active { color: #CC0000; }
.doc-nav-item.active i { transform: scale(1.1); filter: drop-shadow(0 0 8px rgba(204,0,0,.6)); }
.doc-nav-item.active span { color: #CC0000; font-weight: 700; }
.doc-nav-item.active::before {
  content:''; position:absolute; top:0; left:50%; transform:translateX(-50%);
  width:36px; height:3px;
  background: linear-gradient(90deg,transparent,#CC0000,transparent);
  border-radius:0 0 4px 4px;
  box-shadow:0 0 10px rgba(204,0,0,.6);
  animation: docNavGlow 2s ease-in-out infinite;
}
@keyframes docNavGlow {
  0%,100% { opacity:1; box-shadow:0 0 10px rgba(204,0,0,.6); }
  50%      { opacity:.7; box-shadow:0 0 20px rgba(204,0,0,.8); }
}
.doc-nav-item:active::after {
  content:''; position:absolute; top:50%; left:50%;
  width: 80px; height: 80px; border-radius:50%;
  background:rgba(204,0,0,.2); transform:translate(-50%,-50%);
  animation: docNavRipple .4s ease-out forwards;
}
@keyframes docNavRipple {
  from { opacity:1; transform:translate(-50%,-50%) scale(0); }
  to   { opacity:0; transform:translate(-50%,-50%) scale(1); }
}
@media (max-width: 768px) {
  .doc-bottom-nav { display: block; }
  body {
    padding-top: 52px;
    padding-bottom: calc(65px + env(safe-area-inset-bottom, 0px)) !important;
  }
  .pg-topbar { top: 52px !important; }
}
@media (max-width: 359px) {
  .doc-nav-item i { font-size: 19px; }
  .doc-nav-item span { font-size: 9px; }
  .doc-bottom-nav { height: 60px; }
  .doc-nav-container { height: 60px; }
}