/* ==========================================================================
   TIS-RMS DOCUMENTATION & USER GUIDE - STYLESHEET
   Design System: Emerald / Dark Green, Slate Glassmorphism, Modern Typography
   ========================================================================== */

:root {
  /* Color Palette - Light Mode */
  --bg-primary: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-surface-elevated: #FFFFFF;
  --bg-subtle: #F1F5F9;
  --border-subtle: #E2E8F0;
  --border-strong: #CBD5E1;

  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;

  --primary: #00B074;
  --primary-hover: #009663;
  --primary-light: #ECFDF5;
  --primary-dark: #064E3B;
  --primary-glow: rgba(0, 176, 116, 0.25);

  --accent-blue: #2563EB;
  --accent-amber: #D97706;
  --accent-rose: #E11D48;
  --accent-purple: #7C3AED;

  --sidebar-w: 280px;
  --header-h: 70px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-primary: #0B0F17;
  --bg-surface: #111827;
  --bg-surface-elevated: #1F2937;
  --bg-subtle: #1E293B;
  --border-subtle: #1F2937;
  --border-strong: #374151;

  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;

  --primary: #10B981;
  --primary-hover: #059669;
  --primary-light: rgba(16, 185, 129, 0.15);
  --primary-dark: #A7F3D0;
  --primary-glow: rgba(16, 185, 129, 0.35);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

/* Base & Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  text-decoration: underline;
}

/* ── Top Header ─────────────────────────────────────────── */
.doc-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-menu-btn,
.mobile-search-btn {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-subtle);
  color: var(--text-primary);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}

.mobile-menu-btn:hover,
.mobile-search-btn:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--border-strong);
}

.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 95;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.sidebar-backdrop.active {
  display: block;
  opacity: 1;
  pointer-events: auto;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.header-brand img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  object-fit: contain;
  box-shadow: 0 2px 8px var(--primary-glow);
  flex-shrink: 0;
}

.brand-text h1 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.brand-text span {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.header-search {
  flex: 1;
  max-width: 420px;
  margin: 0 24px;
  position: relative;
}

.search-input-wrap {
  display: flex;
  align-items: center;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 0 14px;
  transition: var(--transition);
}

.search-input-wrap:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg-surface);
}

.search-icon {
  color: var(--text-muted);
  margin-right: 8px;
}

.search-input {
  width: 100%;
  height: 40px;
  background: transparent;
  border: none;
  outline: none;
  font-size: 0.88rem;
  color: var(--text-primary);
}

.search-kbd {
  font-size: 0.7rem;
  font-family: monospace;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.platform-pill-toggle {
  display: flex;
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 3px;
  border: 1px solid var(--border-subtle);
}

.platform-btn {
  padding: 6px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.platform-btn.active {
  background: var(--primary);
  color: #FFFFFF;
  box-shadow: var(--shadow-sm);
}

.theme-toggle-btn, .print-btn, .github-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-subtle);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-toggle-btn:hover, .print-btn:hover, .github-btn:hover {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

/* ── Layout Container ───────────────────────────────────── */
.doc-layout {
  display: flex;
  max-width: 1600px;
  margin: 0 auto;
  position: relative;
}

/* ── Sidebar Navigation ─────────────────────────────────── */
.doc-sidebar {
  width: var(--sidebar-w);
  height: calc(100vh - var(--header-h));
  position: sticky;
  top: var(--header-h);
  overflow-y: auto;
  padding: 24px 16px;
  border-right: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  flex-shrink: 0;
}

.sidebar-heading {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 16px 12px 8px;
}

.sidebar-nav {
  list-style: none;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
  margin-bottom: 2px;
}

.nav-link:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
  text-decoration: none;
}

.nav-link.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.nav-link .nav-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: var(--transition);
}

.nav-link:hover .nav-icon,
.nav-link.active .nav-icon {
  color: var(--primary);
}

.nav-link .nav-icon svg {
  width: 16px;
  height: 16px;
}

.nav-badge {
  margin-left: auto;
  font-size: 0.68rem;
  padding: 2px 6px;
  border-radius: 999px;
  font-weight: 600;
  background: var(--bg-subtle);
  color: var(--text-muted);
}

.nav-link.active .nav-badge {
  background: var(--primary);
  color: #fff;
}

/* ── Main Content Area ──────────────────────────────────── */
.doc-main {
  flex: 1;
  min-width: 0;
  padding: 40px 48px 100px;
}

/* ── Hero Banner ────────────────────────────────────────── */
.hero-banner {
  background: linear-gradient(135deg, rgba(0, 176, 116, 0.12) 0%, rgba(37, 99, 235, 0.06) 100%);
  border: 1px solid rgba(0, 176, 116, 0.2);
  border-radius: var(--radius-xl);
  padding: 40px;
  margin-bottom: 48px;
  position: relative;
  overflow: hidden;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin-bottom: 24px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* ── Content Sections ───────────────────────────────────── */
.doc-section {
  margin-bottom: 64px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.section-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.section-title {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* ── Typography & Cards ─────────────────────────────────── */
h3.subheading {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 28px 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

p.paragraph {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.7;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
  margin: 20px 0;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  flex-shrink: 0;
}

.card-icon svg {
  width: 20px;
  height: 20px;
}

.card-title {
  font-size: 1.02rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── Module Summary Box (Reader-Friendly Key Points) ────── */
.module-summary {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 16px 0 24px;
}

.module-summary-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.module-summary-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.module-summary-list li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.module-summary-list li::before {
  content: "•";
  color: var(--primary);
  font-weight: bold;
}

/* ── Step-by-Step Instructions ─────────────────────────── */
.steps-container {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin: 24px 0;
}

.step-card {
  display: flex;
  gap: 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
}

.step-number {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px var(--primary-glow);
}

.step-content h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.step-content p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── Callout Alerts ─────────────────────────────────────── */
.callout {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin: 20px 0;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  font-size: 0.9rem;
  line-height: 1.6;
}

.callout.tip {
  background: rgba(16, 185, 129, 0.08);
  border-left: 4px solid var(--primary);
  color: var(--text-primary);
}

.callout.important {
  background: rgba(37, 99, 235, 0.08);
  border-left: 4px solid var(--accent-blue);
  color: var(--text-primary);
}

.callout.warning {
  background: rgba(217, 119, 6, 0.08);
  border-left: 4px solid var(--accent-amber);
  color: var(--text-primary);
}

.callout-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}

.callout.tip .callout-icon { color: var(--primary); }
.callout.important .callout-icon { color: var(--accent-blue); }
.callout.warning .callout-icon { color: var(--accent-amber); }

.callout-icon svg {
  width: 18px;
  height: 18px;
}
  flex-shrink: 0;
}

/* ── Screenshot Mockup Showcase ─────────────────────────── */
.mockup-container {
  margin: 28px 0;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 24px;
  position: relative;
}

.mockup-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.mockup-tab-btn {
  padding: 6px 14px;
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.mockup-tab-btn.active {
  background: var(--primary);
  color: #FFFFFF;
  border-color: var(--primary);
}

/* Windows Window Chrome */
.window-chrome {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.window-titlebar {
  height: 32px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.window-dots {
  display: flex;
  gap: 6px;
}

.window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-strong);
}

.window-dots span:nth-child(1) { background: #EF4444; }
.window-dots span:nth-child(2) { background: #F59E0B; }
.window-dots span:nth-child(3) { background: #10B981; }

.mockup-img-wrap {
  position: relative;
  overflow: hidden;
  background: #000;
  display: flex;
  justify-content: center;
  cursor: zoom-in;
}

.mockup-img-wrap img {
  width: 100%;
  height: auto;
  max-height: 520px;
  object-fit: contain;
  display: block;
  transition: transform 0.3s ease;
}

.mockup-img-wrap:hover img {
  transform: scale(1.015);
}

.zoom-overlay-hint {
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: rgba(15, 23, 42, 0.75);
  color: #fff;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  backdrop-filter: blur(4px);
  pointer-events: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.zoom-overlay-hint svg {
  width: 13px;
  height: 13px;
}

/* ── Mobile Phone Chrome ────────────────────────────────── */
.mobile-chrome {
  max-width: 360px;
  margin: 0 auto;
  background: #1E293B;
  border: 10px solid #0F172A;
  border-radius: 36px;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.mobile-notch {
  height: 24px;
  background: #0F172A;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-notch-camera {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #334155;
}

.mobile-img-wrap {
  cursor: zoom-in;
}

.mobile-img-wrap img {
  width: 100%;
  display: block;
}

/* ── Interactive Video Walkthrough Player ────────────────── */
.video-showcase-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin: 28px 0;
}

.video-screen {
  position: relative;
  width: 100%;
  height: 480px;
  background: #0F172A;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.video-slide-item {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-slide-item.active {
  opacity: 1;
}

.video-slide-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.video-hud-overlay {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(15, 23, 42, 0.85);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.pulse-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 10px var(--primary);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.4); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.video-controls-bar {
  background: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-subtle);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.video-play-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: var(--transition);
  box-shadow: 0 2px 8px var(--primary-glow);
}

.video-play-btn:hover {
  transform: scale(1.05);
  background: var(--primary-hover);
}

.video-timeline {
  flex: 1;
  min-width: 200px;
  display: flex;
  gap: 6px;
}

.timeline-segment {
  flex: 1;
  height: 6px;
  background: var(--border-strong);
  border-radius: 3px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.timeline-segment.active .segment-progress {
  width: 100%;
  background: var(--primary);
}

.timeline-segment.played .segment-progress {
  width: 100%;
  background: var(--primary);
}

.segment-progress {
  height: 100%;
  width: 0;
  transition: width 0.3s ease;
}

.video-chapters {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px 24px;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-subtle);
}

.chapter-btn {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  cursor: pointer;
  transition: var(--transition);
}

.chapter-btn:hover, .chapter-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ── Tables & Data Grids ────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  margin: 20px 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  background: var(--bg-surface);
}

table.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

table.doc-table th {
  background: var(--bg-subtle);
  padding: 12px 18px;
  font-weight: 700;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-subtle);
}

table.doc-table td {
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

table.doc-table tr:last-child td {
  border-bottom: none;
}

table.doc-table tr:hover td {
  background: var(--bg-subtle);
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  text-transform: uppercase;
}

.badge.success { background: #DEF7EC; color: #03543F; }
.badge.info { background: #E1EFFE; color: #1E429F; }
.badge.warning { background: #FEF08A; color: #854D0E; }
.badge.danger { background: #FDE8E8; color: #9B1C1C; }

/* ── Lightbox Modal ─────────────────────────────────────── */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

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

.lightbox-img {
  max-width: 95%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  animation: zoomIn 0.2s ease-out;
}

@keyframes zoomIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.4);
}

.lightbox-caption {
  position: absolute;
  bottom: 24px;
  background: rgba(15, 23, 42, 0.8);
  color: #fff;
  padding: 8px 18px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
}

/* ── FAQ Accordion Section ─────────────────────────────── */
.faq-category {
  margin: 32px 0 16px;
}

.faq-category:first-of-type {
  margin-top: 16px;
}

.faq-category-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--border-strong);
}

.faq-question {
  width: 100%;
  padding: 16px 20px;
  background: transparent;
  border: none;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: inherit;
}

.faq-question svg {
  transition: transform 0.25s ease;
  flex-shrink: 0;
  color: var(--text-muted);
}

.faq-item.active {
  border-color: var(--primary);
  box-shadow: 0 2px 8px var(--primary-glow);
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  display: none;
  padding: 0 20px 18px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.65;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-subtle);
}

.faq-item.active .faq-answer {
  display: block;
  animation: slideDown 0.2s ease-out;
}

.faq-answer p {
  margin-top: 12px;
}

.faq-answer p:first-child {
  margin-top: 14px;
}

.faq-answer ul {
  margin: 10px 0 10px 20px;
}

.faq-answer li {
  margin-bottom: 6px;
}

/* ── Footer ─────────────────────────────────────────────── */
.doc-footer {
  margin-top: 64px;
  border-top: 1px solid var(--border-subtle);
  padding: 32px 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-credits {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-credits img {
  width: 28px;
  height: 28px;
}

/* ── Responsive Adaptations ─────────────────────────────── */
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 1024px) {
  :root {
    --header-h: 62px;
  }

  .mobile-menu-btn {
    display: flex !important;
  }

  .mobile-search-btn {
    display: flex !important;
  }

  .print-btn {
    display: none !important;
  }

  .header-search {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    margin: 0;
    max-width: none;
    background: var(--bg-surface);
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-subtle);
    display: none;
    box-shadow: var(--shadow-md);
    z-index: 90;
  }

  .header-search.mobile-open {
    display: block !important;
    animation: slideDown 0.2s ease-out;
  }

  .search-kbd {
    display: none;
  }

  .doc-sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: -320px;
    height: 100vh;
    z-index: 100;
    width: 290px;
    background: var(--bg-surface);
    border-right: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-xl);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 20px 16px 40px;
  }

  .doc-sidebar.open {
    transform: translateX(320px);
  }

  .doc-main {
    padding: 28px 24px 80px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 60px;
  }

  .doc-header {
    padding: 0 14px;
  }

  .platform-pill-toggle .platform-text {
    display: none;
  }

  .platform-btn {
    padding: 6px 8px;
    font-size: 0.75rem;
  }

  .print-btn {
    display: none;
  }

  .hero-banner {
    padding: 24px 18px;
    margin-bottom: 36px;
    border-radius: var(--radius-lg);
  }

  .hero-title {
    font-size: 1.55rem;
  }

  .hero-subtitle {
    font-size: 0.92rem;
    margin-bottom: 18px;
  }

  .doc-section {
    margin-bottom: 48px;
  }

  .section-title {
    font-size: 1.35rem;
  }

  .section-subtitle {
    font-size: 0.88rem;
  }

  .video-screen {
    height: clamp(210px, 54vw, 340px);
  }

  .video-hud-overlay {
    font-size: 0.75rem;
    padding: 5px 10px;
    top: 10px;
    left: 10px;
    max-width: calc(100% - 20px);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .video-controls-bar {
    padding: 10px 14px;
    gap: 10px;
  }

  .video-chapters {
    padding: 8px 12px;
    gap: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .chapter-btn {
    font-size: 0.75rem;
    padding: 5px 10px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 14px;
    margin: 16px 0;
  }

  .mockup-container {
    padding: 14px 10px;
    border-radius: var(--radius-lg);
    margin: 20px 0;
  }

  .mockup-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
    gap: 6px;
  }

  .mockup-tab-btn {
    white-space: nowrap;
    font-size: 0.78rem;
    padding: 6px 12px;
    flex-shrink: 0;
  }

  .step-card {
    padding: 16px 14px;
    gap: 14px;
  }

  .step-number {
    width: 32px;
    height: 32px;
    font-size: 0.85rem;
  }

  .table-wrap {
    margin: 16px 0;
    -webkit-overflow-scrolling: touch;
  }

  table.doc-table th, table.doc-table td {
    padding: 10px 12px;
    font-size: 0.82rem;
    white-space: nowrap;
  }

  .table-wrap table.doc-table td:nth-child(1),
  .table-wrap table.doc-table td:nth-child(2) {
    white-space: normal;
  }
}

@media (max-width: 480px) {
  .doc-main {
    padding: 16px 12px 60px;
  }

  .brand-text span {
    display: none;
  }

  .brand-text h1 {
    font-size: 0.95rem;
  }

  .header-brand img {
    width: 32px;
    height: 32px;
  }

  .header-actions {
    gap: 6px;
  }

  .theme-toggle-btn,
  .mobile-menu-btn,
  .mobile-search-btn {
    width: 34px;
    height: 34px;
  }

  .hero-banner {
    padding: 18px 14px;
  }

  .hero-tag {
    font-size: 0.7rem;
    padding: 3px 8px;
    margin-bottom: 12px;
  }

  .hero-title {
    font-size: 1.32rem;
  }

  .hero-subtitle {
    font-size: 0.85rem;
    margin-bottom: 14px;
  }

  .badge-item {
    font-size: 0.7rem;
    padding: 4px 8px;
  }

  .section-title {
    font-size: 1.18rem;
  }

  .module-summary {
    padding: 12px 14px;
    margin: 12px 0 20px;
  }

  .module-summary-list li {
    font-size: 0.82rem;
  }

  .mobile-chrome {
    border-width: 6px;
    border-radius: 20px;
  }

  .window-titlebar {
    height: 26px;
    font-size: 0.7rem;
    padding: 0 8px;
  }

  .callout {
    padding: 12px 14px;
    gap: 10px;
    font-size: 0.84rem;
  }

  .doc-footer {
    padding: 24px 0 16px;
    font-size: 0.78rem;
  }
}

/* Print Styles */
@media print {
  .doc-header, .doc-sidebar, .mockup-tabs, .video-controls-bar, .video-chapters, .theme-toggle-btn, .print-btn {
    display: none !important;
  }
  .doc-main {
    padding: 0;
    max-width: 100%;
  }
  .doc-section {
    page-break-inside: avoid;
  }
}