/* ==========================================================================
   LITPROSE.AI BOOKS - MASTER STYLESHEET
   Supports Light, Medium (Sepia / Warm Paper), and Dark Modes
   Plus: Multi-Editor Modes (Native Text, PDF, Word DOC, LibreOffice ODT, Flipper Book)
   ========================================================================== */

:root {
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-serif: 'Merriweather', Georgia, serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 1. Light Theme (Clean White & Slate) */
[data-theme="light"], :root {
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-secondary: #f1f5f9;
  --bg-editor: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: #2563eb;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --brand-primary: #2563eb;
  --brand-accent: #3b82f6;
  --brand-gradient: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
  
  --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
  --header-bg: rgba(255, 255, 255, 0.95);
}

/* 2. Medium Theme (Warm Book Paper / Sepia Tan / Sand) */
[data-theme="medium"] {
  --bg-primary: #f5efe6;
  --bg-surface: #faf6f0;
  --bg-surface-elevated: #ffffff;
  --bg-secondary: #ebdcc9;
  --bg-editor: #fcf9f5;
  --border-color: #ded1c1;
  --border-focus: #92400e;
  
  --text-primary: #291e14;
  --text-secondary: #574433;
  --text-muted: #857264;
  
  --brand-primary: #92400e;
  --brand-accent: #b45309;
  --brand-gradient: linear-gradient(135deg, #78350f 0%, #d97706 100%);
  
  --card-shadow: 0 4px 20px -2px rgba(90, 65, 45, 0.08);
  --header-bg: rgba(250, 246, 240, 0.95);
}

/* 3. Dark Theme (Midnight Obsidian & Slate) */
[data-theme="dark"] {
  --bg-primary: #0b0f19;
  --bg-surface: #111827;
  --bg-surface-elevated: #1f2937;
  --bg-secondary: #1e293b;
  --bg-editor: #0f172a;
  --border-color: #374151;
  --border-focus: #60a5fa;
  
  --text-primary: #f9fafb;
  --text-secondary: #cbd5e1;
  --text-muted: #9ca3af;
  
  --brand-primary: #3b82f6;
  --brand-accent: #60a5fa;
  --brand-gradient: linear-gradient(135deg, #1d4ed8 0%, #60a5fa 100%);
  
  --card-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.4);
  --header-bg: rgba(17, 24, 39, 0.95);
}

/* Global Applied Theming */
body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary) !important;
  color: var(--text-primary) !important;
  transition: var(--transition);
  min-height: 100vh;
}

/* Top Navbar Styling across all 3 themes */
header.navbar,
.litprose-navbar {
  background-color: var(--header-bg) !important;
  border-color: var(--border-color) !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding-top: 4px !important;
  padding-bottom: 4px !important;
  min-height: 62px;
}

.brand-text {
  color: var(--text-primary) !important;
  letter-spacing: -0.02em;
}

/* Logo Styling: Navbar & Hero */
.litprose-navbar .navbar-brand {
  padding: 0 !important;
  margin: 0 !important;
  display: inline-flex;
  align-items: center;
  height: 54px;
}

.navbar-logo-img {
  height: 54px; /* Stretch fill max allowed for top header */
  width: auto;
  max-height: 54px;
  object-fit: contain;
  border-radius: 8px;
  background-color: #ffffff;
  padding: 3px 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.16);
  display: inline-block;
  vertical-align: middle;
  transition: var(--transition);
}

.navbar-logo-img:hover {
  transform: scale(1.03);
}

.hero-logo-img {
  height: 82px;
  width: auto;
  object-fit: contain;
  border-radius: var(--radius-md);
  background-color: #ffffff;
  padding: 6px 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  flex-shrink: 0;
  transition: var(--transition);
}

.litprose-navbar .navbar-brand {
  color: var(--text-primary) !important;
}

/* Top Navbar Menu Section Items:
   - When NOT selected: Crisp white pill background with solid black font and solid black icon
   - When SELECTED (active): Golden amber button background (#f59e0b) with solid black font and solid black icon
   - Fully consistent across Light, Medium, and Dark modes */
.litprose-navbar .nav-link,
[data-theme="light"] .litprose-navbar .nav-link,
[data-theme="medium"] .litprose-navbar .nav-link,
[data-theme="dark"] .litprose-navbar .nav-link {
  background-color: #ffffff !important; /* White background when not selected */
  color: #000000 !important; /* Solid black font */
  font-weight: 700 !important;
  border: 1px solid rgba(0, 0, 0, 0.14) !important;
  border-radius: 9999px !important; /* Rounded pill style */
  padding: 0.38rem 0.95rem !important;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.10) !important;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.litprose-navbar .nav-link i,
.litprose-navbar .nav-link svg,
.litprose-navbar .nav-link *,
[data-theme="light"] .litprose-navbar .nav-link i,
[data-theme="medium"] .litprose-navbar .nav-link i,
[data-theme="dark"] .litprose-navbar .nav-link i {
  color: #000000 !important; /* Inner icons must be solid black */
}

.litprose-navbar .nav-link:hover,
[data-theme="light"] .litprose-navbar .nav-link:hover,
[data-theme="medium"] .litprose-navbar .nav-link:hover,
[data-theme="dark"] .litprose-navbar .nav-link:hover {
  background-color: #fef3c7 !important; /* Soft light amber tint on hover */
  color: #000000 !important;
  border-color: #f59e0b !important;
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.18) !important;
}

.litprose-navbar .nav-link:hover i,
[data-theme="light"] .litprose-navbar .nav-link:hover i,
[data-theme="medium"] .litprose-navbar .nav-link:hover i,
[data-theme="dark"] .litprose-navbar .nav-link:hover i {
  color: #000000 !important;
}

/* SELECTED / ACTIVE Section Item: Shows the amber button background across Light, Medium, Dark */
.litprose-navbar .nav-link.active,
[data-theme="light"] .litprose-navbar .nav-link.active,
[data-theme="medium"] .litprose-navbar .nav-link.active,
[data-theme="dark"] .litprose-navbar .nav-link.active {
  background-color: #f59e0b !important; /* Show amber button background when selected */
  color: #000000 !important; /* Solid black font */
  font-weight: 800 !important;
  border: 1px solid #d97706 !important;
  border-radius: 9999px !important;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.22) !important;
}

.litprose-navbar .nav-link.active i,
.litprose-navbar .nav-link.active svg,
.litprose-navbar .nav-link.active *,
[data-theme="light"] .litprose-navbar .nav-link.active i,
[data-theme="medium"] .litprose-navbar .nav-link.active i,
[data-theme="dark"] .litprose-navbar .nav-link.active i {
  color: #000000 !important; /* Inner icon is solid black when selected */
}

.litprose-navbar .nav-link.active:hover,
[data-theme="light"] .litprose-navbar .nav-link.active:hover,
[data-theme="medium"] .litprose-navbar .nav-link.active:hover,
[data-theme="dark"] .litprose-navbar .nav-link.active:hover {
  background-color: #fbbf24 !important;
  color: #000000 !important;
}

.litprose-navbar .nav-link.active:hover i,
[data-theme="light"] .litprose-navbar .nav-link.active:hover i,
[data-theme="medium"] .litprose-navbar .nav-link.active:hover i,
[data-theme="dark"] .litprose-navbar .nav-link.active:hover i {
  color: #000000 !important;
}

[data-theme="medium"] .brand-text {
  color: #291e14 !important;
}

.podman-badge {
  background-color: var(--bg-surface-elevated) !important;
  color: var(--text-primary) !important;
  border: 1px solid var(--border-color) !important;
}

[data-theme="dark"] .podman-badge {
  background-color: #1e293b !important;
  color: #f1f5f9 !important;
  border-color: #334155 !important;
}

[data-theme="medium"] .podman-badge {
  background-color: #f0e6d6 !important;
  color: #3d2b1f !important;
  border-color: #d8c7b0 !important;
}

.active-model-btn {
  background-color: transparent !important;
  border-color: var(--brand-primary) !important;
  color: var(--brand-primary) !important;
}

[data-theme="dark"] .active-model-btn {
  border-color: #38bdf8 !important;
  color: #38bdf8 !important;
}

[data-theme="dark"] .active-model-btn:hover {
  background-color: #38bdf8 !important;
  color: #0b0f19 !important;
}

/* Card Theming - Safeguard gradient and custom cards */
.card:not(.bg-gradient-primary):not(.gradient-hero-card):not(.hero-hardware-card):not([class*="bg-primary"]):not([class*="bg-danger"]):not([class*="bg-success"]) {
  background-color: var(--bg-surface) !important;
  border-color: var(--border-color) !important;
  box-shadow: var(--card-shadow) !important;
  color: var(--text-primary);
  transition: var(--transition);
}

.card-header:not(.bg-gradient-primary), .card-footer {
  background-color: var(--bg-surface) !important;
  border-color: var(--border-color) !important;
}

.card.bg-gradient-primary,
.gradient-hero-card {
  background: var(--brand-gradient) !important;
  color: #ffffff !important;
  border: none !important;
}

.card.bg-gradient-primary h1, .card.bg-gradient-primary h2, .card.bg-gradient-primary h3,
.card.bg-gradient-primary h4, .card.bg-gradient-primary h5, .card.bg-gradient-primary p,
.gradient-hero-card h1, .gradient-hero-card h2, .gradient-hero-card h3,
.gradient-hero-card h4, .gradient-hero-card h5, .gradient-hero-card p {
  color: #ffffff !important;
}

/* Local Hardware Profile Mini Card inside Hero */
.hero-hardware-card {
  background: #000000 !important;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.25) !important;
  border-radius: var(--radius-md) !important;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.65) !important;
  color: #ffffff !important;
}

.hero-hardware-card .hardware-header-title {
  color: #fbbf24 !important; /* Gold */
  font-weight: 700;
}

.hero-hardware-card .hardware-line {
  color: #f1f5f9 !important; /* Crisp light text */
}

.hero-hardware-card .hardware-line strong {
  color: #ffffff !important;
  font-weight: 700;
}

.hero-hardware-card .hardware-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.2) !important;
  color: #f1f5f9 !important; /* Crisp white font */
}

.hero-hardware-card .hardware-footer strong {
  color: #ffffff !important;
}

/* ==========================================================================
   Unified Hero Banner Sub-Items & Components across Light, Medium, Dark
   ========================================================================== */
.hero-sub-card {
  background: #000000 !important; /* Pitch black background for maximum contrast */
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.22) !important;
  border-radius: var(--radius-md) !important;
  color: #ffffff !important;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.55) !important;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.hero-sub-card:hover,
.hero-hardware-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.75) !important;
  border-color: rgba(255, 255, 255, 0.45) !important;
}

.hero-sub-card h6,
.hero-sub-card .h6,
.hero-sub-card strong,
.hero-sub-card .fw-bold {
  color: #ffffff !important;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.hero-sub-card p,
.hero-sub-card .text-white-50 {
  color: #f1f5f9 !important; /* Crisp high-contrast readable off-white */
  line-height: 1.55;
}

.hero-sub-card .text-uppercase {
  color: #cbd5e1 !important; /* High contrast slate-white */
  letter-spacing: 0.05em;
}

/* High-contrast green on dark surfaces vs light-yellow pill surfaces */
.hero-sub-card i.text-success,
.hero-hardware-card i.text-success,
.gradient-hero-card i.text-success,
.gradient-hero-card span.text-success,
.gradient-hero-card div.text-success {
  color: #4ade80 !important; /* Luminous emerald green with strong visibility on dark */
}

/* Light Yellow Pill/Badge Container for Green Font & Icons for crystal-clear readability */
.badge-green-pill,
.badge-green-on-yellow,
.hero-sub-card .badge.bg-success,
.hero-hardware-card .badge.bg-success {
  background-color: #fef08a !important; /* Warm light yellow */
  color: #14532d !important; /* Deep forest green with high contrast */
  font-weight: 700 !important;
  border: 1px solid #fde047 !important;
  border-radius: 9999px !important;
  padding: 0.22rem 0.6rem !important;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35) !important;
  text-shadow: none !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 0.25rem !important;
}

.badge-green-pill i,
.badge-green-on-yellow i,
.hero-sub-card .badge.bg-success i,
.hero-hardware-card .badge.bg-success i {
  color: #15803d !important; /* Deep readable green on yellow */
}

.icon-yellow-container {
  background-color: #fef08a !important; /* Warm light yellow */
  color: #14532d !important; /* Rich green */
  border: 1px solid #fde047 !important;
  border-radius: 6px !important;
  padding: 3px 6px !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3) !important;
  line-height: 1 !important;
}

.icon-yellow-container i {
  color: #14532d !important;
}

.hero-icon-box {
  background: #ffffff !important; /* Crisp white background */
  border: none !important; /* No border lines */
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 58px;
  min-height: 58px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.22) !important;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* Hero Banner Guide Buttons: Author Guide, Editorial Guide, Prose SI Guide, Translation Guide */
.btn-hero-guide {
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.55) !important;
  background-color: transparent !important;
  transition: all 0.2s ease !important;
}

.btn-hero-guide i {
  color: #fbbf24 !important; /* Gold / Amber icon */
  transition: color 0.2s ease !important;
}

.btn-hero-guide:hover,
.btn-hero-guide:focus,
.btn-hero-guide:active {
  background-color: #ffffff !important;
  border-color: #ffffff !important;
  color: #000000 !important; /* Solid black font when hovered */
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25) !important;
  transform: translateY(-1px);
}

.btn-hero-guide:hover i,
.btn-hero-guide:focus i,
.btn-hero-guide:active i,
.btn-hero-guide:hover *,
.btn-hero-guide:focus *,
.btn-hero-guide:active * {
  color: #000000 !important; /* Inner icon turns black on white hover */
}

/* Literary Prose SI Stylistic Canons Summary paragraph */
.literary-canons-summary {
  font-size: 1.12rem !important;
  line-height: 1.65 !important;
  color: #000000 !important;
  font-weight: 500;
}

[data-theme="dark"] .literary-canons-summary {
  color: #ffffff !important;
}

.hero-icon-box i {
  color: #d97706 !important; /* Rich amber-gold for optimal contrast on white */
}

.hero-icon-box:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35) !important;
}

[data-theme="medium"] .hero-icon-box {
  background: #ffffff !important;
  border: none !important;
}


.bg-body-tertiary {
  background-color: var(--bg-primary) !important;
}

.bg-light {
  background-color: var(--bg-secondary) !important;
  color: var(--text-primary) !important;
}

.bg-white {
  background-color: var(--bg-surface) !important;
  color: var(--text-primary) !important;
}

.text-dark {
  color: var(--text-primary) !important;
}

/* Guard: Yellow / Gold buttons & badges must retain dark readable text across all themes */
.btn-warning,
.btn-warning:hover,
.btn-warning:focus,
.btn-warning:active,
.btn-warning.text-dark,
.btn-warning.text-white,
.badge.bg-warning,
.badge.bg-warning.text-dark,
.badge.bg-warning.text-white,
[data-theme="dark"] .btn-warning,
[data-theme="dark"] .btn-warning:hover,
[data-theme="dark"] .btn-warning:focus,
[data-theme="dark"] .btn-warning:active,
[data-theme="dark"] .btn-warning.text-dark,
[data-theme="dark"] .btn-warning.text-white,
[data-theme="dark"] .badge.bg-warning,
[data-theme="dark"] .badge.bg-warning.text-dark,
[data-theme="dark"] .badge.bg-warning.text-white {
  background-color: #f59e0b !important;
  color: #0f172a !important;
  border-color: #d97706 !important;
}

.btn-warning *,
.badge.bg-warning *,
[data-theme="dark"] .btn-warning *,
[data-theme="dark"] .badge.bg-warning * {
  color: #0f172a !important;
}

.text-muted, .text-secondary {
  color: var(--text-secondary) !important;
}

.border, .border-bottom, .border-top, .border-start, .border-end {
  border-color: var(--border-color) !important;
}

/* Hero Branding Gradient */
.bg-gradient-primary {
  background: var(--brand-gradient) !important;
}

/* 3-Way Theme Switcher Segmented Control */
.theme-switcher-group {
  display: inline-flex;
  align-items: center;
  align-self: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  padding: 3px;
  gap: 2px;
  margin: 0;
}

.theme-pill-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  outline: none;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.2;
  padding: 5px 12px;
  border-radius: 20px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.theme-pill-btn:hover {
  color: var(--text-primary);
}

.theme-pill-btn.active {
  background: var(--bg-surface-elevated);
  color: var(--brand-primary);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

/* Editor Mode Switcher Group */
.editor-mode-group {
  display: inline-flex;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2px;
  gap: 2px;
}

.editor-mode-btn {
  background: transparent;
  border: none;
  outline: none;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.editor-mode-btn:hover {
  color: var(--text-primary);
}

.editor-mode-btn.active {
  background: var(--bg-surface-elevated);
  color: var(--brand-primary);
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* ==========================================================================
   EDITOR STYLED MODES
   ========================================================================== */

/* 1. Native Manuscript Mode */
.editor-mode-native .manuscript-textarea {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  line-height: 1.8;
  background-color: var(--bg-editor) !important;
  color: var(--text-primary) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

/* 2. PDF Print-Page Mode */
.editor-mode-pdf .manuscript-canvas {
  background-color: #ffffff !important;
  color: #1e293b !important;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  padding: 2.5rem 2rem;
  max-width: 820px;
  margin: 0 auto;
  position: relative;
}

.editor-mode-pdf .manuscript-canvas::before {
  content: "PDF PRINT BOUNDARY • 8.5\" x 11\"";
  position: absolute;
  top: 8px;
  right: 15px;
  font-size: 0.65rem;
  font-weight: bold;
  color: #94a3b8;
  letter-spacing: 0.05em;
}

/* 3. Word DOC / DOCX Mode */
.editor-mode-word .manuscript-canvas {
  background-color: #ffffff !important;
  color: #0f172a !important;
  border: 2px solid #2b579a;
  box-shadow: 0 8px 24px rgba(43, 87, 154, 0.15);
  border-radius: 6px;
  padding: 2.5rem 2.5rem;
  max-width: 850px;
  margin: 0 auto;
}

.editor-mode-word .word-ribbon {
  background: #2b579a;
  color: #ffffff;
  padding: 6px 14px;
  border-radius: 4px 4px 0 0;
  font-size: 0.75rem;
  font-weight: bold;
  letter-spacing: 0.04em;
}

.editor-mode-word .manuscript-textarea {
  font-family: 'Calibri', 'Times New Roman', serif;
  font-size: 1.15rem;
  line-height: 1.6;
  text-indent: 0.5in;
  border: none !important;
}

/* 4. LibreOffice ODT Mode */
.editor-mode-odt .manuscript-canvas {
  background-color: #ffffff !important;
  color: #111827 !important;
  border: 1px solid #107c41;
  box-shadow: 0 6px 20px rgba(16, 124, 65, 0.12);
  border-radius: 4px;
  padding: 2rem 2.2rem;
  max-width: 830px;
  margin: 0 auto;
}

.editor-mode-odt .odt-banner {
  background: #107c41;
  color: #ffffff;
  padding: 5px 12px;
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 3px 3px 0 0;
}

/* 5. Flip-Book Reader / Flipper Viewer Mode */
.flipbook-container {
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 2000px;
  padding: 1.5rem 92px;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: visible;
}

.flipbook-spread {
  display: flex;
  flex-direction: row;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 15px 45px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  max-width: 1080px;
  width: 100%;
  min-height: 640px;
  position: relative;
  box-sizing: border-box;
}

.flipbook-page-left, .flipbook-page-right {
  flex: 0 0 50% !important;
  width: 50% !important;
  max-width: 50% !important;
  min-width: 0 !important;
  box-sizing: border-box !important;
  padding: 1.25rem 1.4rem;
  display: flex;
  flex-direction: column;
  position: relative;
  background: #ffffff;
  color: #1e293b;
  overflow-x: hidden;
}

.flipbook-page-left {
  border-right: 1px solid #e2e8f0;
  background: linear-gradient(to right, #fafafa 0%, #ffffff 92%, #e5e7eb 100%);
  justify-content: space-between;
}

.flipbook-page-right {
  background: linear-gradient(to left, #fafafa 0%, #ffffff 92%, #e5e7eb 100%);
  justify-content: space-between;
}

.flipbook-spine {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 16px;
  margin-left: -8px;
  background: linear-gradient(to right, rgba(0,0,0,0.12), rgba(0,0,0,0.02) 50%, rgba(0,0,0,0.12));
  pointer-events: none;
  z-index: 10;
}

[data-theme="dark"] .flipbook-spread {
  background: #0f172a;
  box-shadow: 0 15px 45px rgba(0, 0, 0, 0.6), 0 0 0 1px #334155;
}

[data-theme="dark"] .flipbook-page-left,
[data-theme="dark"] .flipbook-page-right {
  background: #111827;
  color: #f1f5f9;
}

[data-theme="dark"] .flipbook-page-left {
  border-right-color: #1e293b;
  background: linear-gradient(to right, #0b0f19 0%, #111827 92%, #1e293b 100%);
}

[data-theme="dark"] .flipbook-page-right {
  background: linear-gradient(to left, #0b0f19 0%, #111827 92%, #1e293b 100%);
}

.flip-nav-group {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  gap: 5px;
  z-index: 30;
}

.flip-nav-group.prev-group {
  left: 6px;
}

.flip-nav-group.next-group {
  right: 6px;
}

.flip-nav-btn {
  position: relative;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--brand-primary);
  color: white;
  border: 2px solid #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  z-index: 30;
  transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
  text-decoration: none;
}

.flip-nav-btn:hover:not(.disabled) {
  transform: scale(1.1);
  background: var(--brand-accent);
  color: white;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.35);
}

.flip-nav-btn.disabled {
  opacity: 0.38;
  pointer-events: none;
  cursor: default;
}

/* Filmstrip Thumbnails */
.filmstrip-container {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 4px;
  scrollbar-width: thin;
}

.filmstrip-thumb {
  flex: 0 0 68px;
  height: 84px;
  border-radius: 4px;
  border: 2px solid var(--border-color);
  background: #ffffff;
  cursor: pointer;
  overflow: hidden;
  position: relative;
  transition: var(--transition);
}

.filmstrip-thumb:hover {
  border-color: var(--brand-primary);
  transform: translateY(-2px);
}

.filmstrip-thumb.active {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 2px var(--brand-primary);
}

.filmstrip-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.filmstrip-thumb .thumb-number {
  position: absolute;
  bottom: 2px;
  right: 2px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 0.6rem;
  padding: 1px 4px;
  border-radius: 2px;
}

/* Issue Cards in the 8-Category Deck */
.issue-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  margin-bottom: 0.75rem;
  transition: var(--transition);
}

.issue-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow);
}

.issue-snippet {
  font-family: var(--font-mono);
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.82rem;
}

[data-theme="medium"] .issue-snippet {
  background: rgba(180, 83, 9, 0.15);
  color: #92400e;
}

.issue-suggestion {
  font-family: var(--font-mono);
  background: rgba(34, 197, 94, 0.12);
  color: #16a34a;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.82rem;
}

/* Pulse Green Indicator */
.pulse-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Nav Tabs */
.nav-tabs .nav-link {
  color: var(--text-secondary);
  border: none;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.nav-tabs .nav-link.active {
  color: var(--brand-primary) !important;
  background: transparent !important;
  border-bottom: 2px solid var(--brand-primary) !important;
}

/* Checkpoint Timeline */
.checkpoint-timeline .checkpoint-item {
  border-left: 3px solid var(--brand-primary) !important;
}

/* Utility helpers */
.hover-shadow:hover {
  transform: translateY(-3px);
}
.text-truncate-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Universal Theme Styling: Modals, Forms, Dropdowns, Tables */
.modal-content {
  background-color: var(--bg-surface) !important;
  color: var(--text-primary) !important;
  border-color: var(--border-color) !important;
}

.modal-header, .modal-footer {
  border-color: var(--border-color) !important;
}

.modal-header.bg-light, .modal-footer.bg-light {
  background-color: var(--bg-secondary) !important;
}

.dropdown-menu {
  background-color: var(--bg-surface) !important;
  border-color: var(--border-color) !important;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25) !important;
}

.dropdown-item {
  color: var(--text-primary) !important;
}

.dropdown-item:hover, .dropdown-item:focus {
  background-color: var(--bg-secondary) !important;
  color: var(--brand-primary) !important;
}

.dropdown-header {
  color: var(--text-muted) !important;
}

.dropdown-divider {
  border-color: var(--border-color) !important;
}

.form-control, .form-select {
  background-color: var(--bg-surface) !important;
  border-color: var(--border-color) !important;
  color: var(--text-primary) !important;
}

.form-control:focus, .form-select:focus {
  background-color: var(--bg-surface) !important;
  border-color: var(--border-focus) !important;
  color: var(--text-primary) !important;
  box-shadow: 0 0 0 0.25rem rgba(37, 99, 235, 0.15);
}

.form-control::placeholder {
  color: var(--text-muted) !important;
  opacity: 0.8;
}

/* =========================================================================
   Table Dark, Medium & Light Theme Styling
   Fixes: Eliminates White Background on Table Rows & Ensures High Contrast
   ========================================================================= */

.table {
  --bs-table-bg: transparent !important;
  --bs-table-color: var(--text-primary) !important;
  --bs-table-hover-bg: var(--bg-secondary) !important;
  --bs-table-hover-color: var(--text-primary) !important;
  --bs-table-accent-bg: transparent !important;
  --bs-table-striped-bg: transparent !important;
  background-color: transparent !important;
  color: var(--text-primary) !important;
  border-color: var(--border-color) !important;
}

.table > :not(caption) > * > * {
  background-color: transparent !important;
  box-shadow: none !important;
  color: var(--text-primary) !important;
  border-color: var(--border-color) !important;
}

.table tbody tr {
  background-color: var(--bg-surface) !important;
  color: var(--text-primary) !important;
  transition: background-color 0.15s ease-in-out;
}

.table tbody tr:hover,
.table-hover tbody tr:hover,
.table-hover tbody tr:hover > * {
  background-color: var(--bg-secondary) !important;
  color: var(--text-primary) !important;
}

.table thead th,
.table thead.table-light th,
thead.table-light,
thead.table-light th {
  background-color: var(--bg-secondary) !important;
  color: var(--text-secondary) !important;
  border-color: var(--border-color) !important;
  box-shadow: none !important;
}

/* Explicit Dark Mode Overrides for Tables */
[data-theme="dark"] .table {
  --bs-table-bg: #111827 !important;
  --bs-table-color: #f9fafb !important;
  --bs-table-hover-bg: #1e293b !important;
  --bs-table-hover-color: #ffffff !important;
  --bs-table-accent-bg: transparent !important;
  --bs-table-striped-bg: transparent !important;
  background-color: #111827 !important;
  color: #f9fafb !important;
  border-color: #374151 !important;
}

[data-theme="dark"] .table > :not(caption) > * > * {
  background-color: #111827 !important;
  box-shadow: none !important;
  color: #f9fafb !important;
  border-color: #374151 !important;
}

[data-theme="dark"] .table tbody tr,
[data-theme="dark"] .table tbody tr.project-table-row,
[data-theme="dark"] .table tbody tr.term-row,
[data-theme="dark"] .table tbody tr.rule-row {
  background-color: #111827 !important;
  color: #f9fafb !important;
}

[data-theme="dark"] .table tbody tr:hover,
[data-theme="dark"] .table-hover tbody tr:hover,
[data-theme="dark"] .table-hover tbody tr:hover > * {
  background-color: #1e293b !important;
  color: #ffffff !important;
}

[data-theme="dark"] .table thead.table-light th,
[data-theme="dark"] thead.table-light,
[data-theme="dark"] thead.table-light th {
  background-color: #1e293b !important;
  color: #94a3b8 !important;
  border-color: #374151 !important;
}

/* Explicit Medium (Sepia / Book Paper) Mode Overrides for Tables */
[data-theme="medium"] .table {
  --bs-table-bg: #faf6f0 !important;
  --bs-table-color: #291e14 !important;
  --bs-table-hover-bg: #ebdcc9 !important;
  --bs-table-hover-color: #291e14 !important;
  background-color: #faf6f0 !important;
  color: #291e14 !important;
  border-color: #ded1c1 !important;
}

[data-theme="medium"] .table > :not(caption) > * > * {
  background-color: #faf6f0 !important;
  box-shadow: none !important;
  color: #291e14 !important;
  border-color: #ded1c1 !important;
}

[data-theme="medium"] .table tbody tr {
  background-color: #faf6f0 !important;
  color: #291e14 !important;
}

[data-theme="medium"] .table-hover tbody tr:hover,
[data-theme="medium"] .table-hover tbody tr:hover > * {
  background-color: #ebdcc9 !important;
  color: #291e14 !important;
}

[data-theme="medium"] thead.table-light,
[data-theme="medium"] thead.table-light th {
  background-color: #ebdcc9 !important;
  color: #574433 !important;
  border-color: #ded1c1 !important;
}

/* =========================================================================
   Badges Theme Contrast: Light, Medium & Dark Modes
   ========================================================================= */

/* Primary Subtle */
[data-theme="dark"] .badge.bg-primary-subtle {
  background-color: rgba(59, 130, 246, 0.2) !important;
  color: #93c5fd !important;
  border-color: rgba(59, 130, 246, 0.3) !important;
}

/* Success Subtle */
[data-theme="dark"] .badge.bg-success-subtle {
  background-color: rgba(16, 185, 129, 0.2) !important;
  color: #6ee7b7 !important;
  border-color: rgba(16, 185, 129, 0.3) !important;
}

/* Secondary Subtle */
[data-theme="dark"] .badge.bg-secondary-subtle {
  background-color: rgba(148, 163, 184, 0.18) !important;
  color: #cbd5e1 !important;
  border-color: rgba(148, 163, 184, 0.3) !important;
}

/* Warning Subtle (Fixes Cadence Target pill & character limit badges) */
.badge.bg-warning-subtle,
.bg-warning-subtle {
  background-color: #fef3c7 !important;
  color: #92400e !important;
  border-color: #fde68a !important;
}

.badge.bg-warning-subtle *,
.bg-warning-subtle * {
  color: #92400e !important;
}

[data-theme="dark"] .badge.bg-warning-subtle,
[data-theme="dark"] .bg-warning-subtle {
  background-color: rgba(245, 158, 11, 0.22) !important;
  color: #fef08a !important; /* Crisp high-contrast bright gold */
  border: 1px solid rgba(245, 158, 11, 0.45) !important;
}

[data-theme="dark"] .badge.bg-warning-subtle *,
[data-theme="dark"] .bg-warning-subtle * {
  color: #fef08a !important;
}

/* Info Subtle */
[data-theme="dark"] .badge.bg-info-subtle,
[data-theme="dark"] .bg-info-subtle {
  background-color: rgba(56, 189, 248, 0.2) !important;
  color: #7dd3fc !important;
  border-color: rgba(56, 189, 248, 0.35) !important;
}

[data-theme="dark"] .badge.bg-info-subtle *,
[data-theme="dark"] .bg-info-subtle * {
  color: #7dd3fc !important;
}

/* Danger Subtle */
[data-theme="dark"] .badge.bg-danger-subtle,
[data-theme="dark"] .bg-danger-subtle {
  background-color: rgba(239, 68, 68, 0.2) !important;
  color: #fca5a5 !important;
  border-color: rgba(239, 68, 68, 0.35) !important;
}

[data-theme="dark"] .badge.bg-danger-subtle *,
[data-theme="dark"] .bg-danger-subtle * {
  color: #fca5a5 !important;
}

/* Light Badges (e.g. language codes, category tags in table) */
.badge.bg-light {
  background-color: var(--bg-secondary) !important;
  color: var(--text-primary) !important;
  border: 1px solid var(--border-color) !important;
}

[data-theme="dark"] .badge.bg-light,
[data-theme="dark"] .badge.bg-light.text-dark,
[data-theme="dark"] .badge.bg-light.text-secondary {
  background-color: #1e293b !important;
  color: #e2e8f0 !important;
  border-color: #334155 !important;
}

/* Purple Subtle (Fantasy Lore & Typography in tables) */
.badge.bg-purple-subtle {
  background-color: #f3e8ff !important;
  color: #7e22ce !important;
  border-color: #d8b4fe !important;
}

[data-theme="dark"] .badge.bg-purple-subtle {
  background-color: rgba(168, 85, 247, 0.2) !important;
  color: #d8b4fe !important;
  border: 1px solid rgba(168, 85, 247, 0.35) !important;
}

/* Code pills in tables */
[data-theme="dark"] code.bg-danger-subtle {
  background-color: rgba(239, 68, 68, 0.2) !important;
  color: #f87171 !important;
  border: 1px solid rgba(239, 68, 68, 0.3) !important;
}

[data-theme="dark"] code.bg-success-subtle {
  background-color: rgba(16, 185, 129, 0.2) !important;
  color: #34d399 !important;
  border: 1px solid rgba(16, 185, 129, 0.3) !important;
}

/* Form input group & inputs in Dark Mode */
[data-theme="dark"] .input-group-text,
[data-theme="dark"] .input-group-text.bg-white {
  background-color: #111827 !important;
  border-color: #374151 !important;
  color: #9ca3af !important;
}

/* Buttons Theme Contrast */
[data-theme="dark"] .btn-outline-secondary {
  color: #cbd5e1 !important;
  border-color: #475569 !important;
}

[data-theme="dark"] .btn-outline-secondary:hover {
  background-color: #334155 !important;
  color: #ffffff !important;
}

[data-theme="dark"] .btn-outline-warning {
  color: #fbbf24 !important;
  border-color: #f59e0b !important;
}

[data-theme="dark"] .btn-outline-warning:hover {
  background-color: #f59e0b !important;
  color: #0f172a !important;
  border-color: #d97706 !important;
}

[data-theme="dark"] .btn-outline-danger {
  color: #f87171 !important;
  border-color: #ef4444 !important;
}

[data-theme="dark"] .btn-outline-danger:hover {
  background-color: #ef4444 !important;
  color: #ffffff !important;
}

[data-theme="dark"] .btn-light {
  background-color: #1e293b !important;
  color: #f1f5f9 !important;
  border-color: #334155 !important;
}

[data-theme="dark"] .btn-light:hover {
  background-color: #334155 !important;
  color: #ffffff !important;
}

[data-theme="dark"] .btn-light i {
  color: #f1f5f9 !important;
}

[data-theme="dark"] .filter-pill.active,
[data-theme="dark"] .filter-pill.btn-dark.active {
  background-color: #3b82f6 !important;
  border-color: #3b82f6 !important;
  color: #ffffff !important;
}

[data-theme="dark"] #testOutputBox {
  background-color: #0f172a !important;
  color: #f8fafc !important;
  border-color: #334155 !important;
}

/* =========================================================================
   Interactive Book Page Visual Inspector & Canvas Layering
   ========================================================================= */

.btn-xs {
  padding: 0.15rem 0.4rem;
  font-size: 0.72rem;
  line-height: 1.2;
  border-radius: 4px;
}

.color-swatch-chip {
  display: inline-block;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  vertical-align: middle;
}

.color-swatch-chip:hover {
  transform: scale(1.25);
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

.color-swatch-chip.active {
  outline: 2px solid var(--brand-primary);
  outline-offset: 1px;
}

/* Canvas Container & Layering: Image ALWAYS Background (z-index 1), Text ALWAYS Foreground (z-index 2) */
.book-canvas-container {
  position: relative !important;
  width: 100% !important;
  height: 560px !important;
  min-height: 520px !important;
  max-height: 600px !important;
  overflow: hidden !important;
  user-select: none;
  box-sizing: border-box !important;
  background: #fafafa;
  border: 1px solid #e5e7eb;
}

.canvas-artwork-layer {
  position: absolute !important;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
  z-index: 1 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  overflow: hidden !important;
  pointer-events: none !important;
}

#canvasArtworkImg {
  max-width: 100% !important;
  max-height: 100% !important;
  object-fit: contain !important;
  transform-origin: center center !important;
  transition: transform 0.08s ease-out !important;
  pointer-events: none !important;
}

.canvas-text-layer {
  position: absolute !important;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
  z-index: 2 !important;
  display: flex !important;
  flex-direction: column !important;
  padding: 1.25rem !important;
  overflow: hidden !important;
  pointer-events: auto !important;
  box-sizing: border-box !important;
  transition: opacity 0.2s ease;
}

/* Phase 2: E-Book Reflow Mode (Optional downstream preview) */
body.ebook-mode-active .canvas-text-layer,
#editorRoot.ebook-mode-active .canvas-text-layer,
.ebook-mode-active #canvasTextContentBox,
.ebook-mode-active #canvasTextContentBoxRight {
  overflow-y: auto !important;
}

/* Phase 1 Print: Strict No-Scroll physical paperback trim */
.book-canvas-container,
.canvas-text-layer,
#canvasTextContentBox,
#canvasTextContentBoxRight,
#facingReaderLeftWrapper .canvas-text-layer,
#facingReaderRightWrapper .canvas-text-layer {
  scrollbar-width: none !important;
  -ms-overflow-style: none !important;
}

.book-canvas-container::-webkit-scrollbar,
.canvas-text-layer::-webkit-scrollbar,
#canvasTextContentBox::-webkit-scrollbar,
#canvasTextContentBoxRight::-webkit-scrollbar {
  display: none !important;
}

.canvas-overlay-text-src,
.canvas-overlay-text-tgt {
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.85), 0 0 1px rgba(0, 0, 0, 0.35);
  word-break: break-word;
}

.canvas-text-layer.overlay-inactive {
  opacity: 0;
  pointer-events: none;
}

/* Separate Bilingual Placement Boxes */
.bilingual-separate-box {
  transition: box-shadow 0.15s ease;
}
.bilingual-separate-box:hover {
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15) !important;
}
.bilingual-box-header {
  cursor: grab !important;
}
.bilingual-box-header:active {
  cursor: grabbing !important;
}

/* Corner & edge resize handles */
.freeform-corner-handle,
.bilingual-resize-handle-se {
  cursor: se-resize !important;
}
.bilingual-resize-handle-s,
.freeform-resize-handle-s {
  cursor: ns-resize !important;
}
.bilingual-resize-handle-e,
.freeform-resize-handle {
  cursor: ew-resize !important;
}

/* Backdrop Presets */
.backdrop-transparent {
  background: transparent !important;
  border: none !important;
}

.backdrop-white-frost {
  background: rgba(255, 255, 255, 0.85) !important;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.4) !important;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.backdrop-dark-frost {
  background: rgba(15, 23, 42, 0.82) !important;
  color: #f8fafc !important;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.backdrop-dark-frost .canvas-overlay-text-src,
.backdrop-dark-frost .canvas-overlay-text-tgt {
  color: #f8fafc !important;
}

.backdrop-parchment {
  background: #fbf7ee !important;
  border: 1px solid #e7decb !important;
  box-shadow: 0 4px 12px rgba(92, 64, 51, 0.12);
  color: #2e1f0f !important;
}

/* Layout Variations on Canvas Artwork */
.layout-fit img {
  max-width: 85% !important;
  max-height: 85% !important;
  object-fit: contain !important;
}

.layout-banner {
  align-items: flex-start !important;
}
.layout-banner img {
  width: 100% !important;
  max-height: 45% !important;
  object-fit: cover !important;
}

.layout-bottom {
  align-items: flex-end !important;
}
.layout-bottom img {
  width: 100% !important;
  max-height: 50% !important;
  object-fit: cover !important;
}

.layout-inset-left {
  justify-content: flex-start !important;
}
.layout-inset-left img {
  max-width: 50% !important;
  max-height: 70% !important;
  margin-left: 10px;
}

.layout-inset-right {
  justify-content: flex-end !important;
}
.layout-inset-right img {
  max-width: 50% !important;
  max-height: 70% !important;
  margin-right: 10px;
}

.layout-split-top {
  align-items: flex-start !important;
}
.layout-split-top img {
  width: 100% !important;
  max-height: 50% !important;
  object-fit: cover !important;
}

.layout-split-bottom {
  align-items: flex-end !important;
}
.layout-split-bottom img {
  width: 100% !important;
  max-height: 50% !important;
  object-fit: cover !important;
}

.layout-background img {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover !important;
  opacity: 0.35 !important;
}

.layout-framed img {
  border: 6px solid #e2d9c8;
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  max-width: 85% !important;
  max-height: 85% !important;
}

.layout-vignette img {
  border-radius: 50%;
  max-width: 70% !important;
  max-height: 70% !important;
  box-shadow: 0 0 25px rgba(0,0,0,0.25);
}

.layout-panoramic img {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover !important;
}

/* Free-Form Locked State (Finished & Published Appearance) */
.freeform-block.freeform-locked {
  border: 1px dashed transparent !important;
  box-shadow: none !important;
  background: transparent !important;
  backdrop-filter: none !important;
}

.freeform-block.freeform-locked:hover {
  border-color: rgba(59, 130, 246, 0.35) !important;
}

.freeform-block.freeform-locked .freeform-header,
.freeform-block.freeform-locked .freeform-resize-handle {
  display: none !important;
}

/* ==========================================================================
   Expert Translator - Literary Prose SI Canon Button (High-Contrast Hover)
   ========================================================================== */
.btn-canon-ref {
  background-color: rgba(245, 158, 11, 0.15) !important;
  border: 1px solid #f59e0b !important;
  color: #fbbf24 !important;
  font-weight: 700 !important;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.btn-canon-ref:hover,
.btn-canon-ref:focus,
.btn-canon-ref:active {
  background-color: #f59e0b !important;
  color: #0f172a !important; /* Deep dark slate text on bright gold */
  border-color: #d97706 !important;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.45) !important;
  transform: translateY(-1px);
}

.btn-canon-ref:hover i,
.btn-canon-ref:focus i,
.btn-canon-ref:active i {
  color: #0f172a !important;
}

/* ==========================================================================
   Docked Edge Tabs for Collapsible Sidebars (Show Spread / Show Audit)
   ========================================================================== */
.sidebar-dock-tab {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1045;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px 6px 14px 6px;
  background: linear-gradient(180deg, #3b82f6 0%, #4f46e5 100%);
  color: #ffffff !important;
  cursor: pointer;
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.45), 0 2px 6px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s ease, background 0.2s ease;
  user-select: none;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.sidebar-dock-tab .tab-dock-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  line-height: 1;
  margin-bottom: 8px;
  color: #ffffff;
}

.sidebar-dock-tab .tab-dock-text {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 0.70rem;
  font-weight: 800;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: #ffffff;
  line-height: 1;
}

.sidebar-dock-tab-left {
  left: 0;
  border-left: none;
  border-radius: 0 12px 12px 0;
}

.sidebar-dock-tab-left:hover {
  transform: translateY(-50%) translateX(4px);
  background: linear-gradient(180deg, #2563eb 0%, #4338ca 100%);
  box-shadow: 0 6px 24px rgba(37, 99, 235, 0.65);
}

.sidebar-dock-tab-right {
  right: 0;
  border-right: none;
  border-radius: 12px 0 0 12px;
}

.sidebar-dock-tab-right:hover {
  transform: translateY(-50%) translateX(-4px);
  background: linear-gradient(180deg, #2563eb 0%, #4338ca 100%);
  box-shadow: 0 6px 24px rgba(37, 99, 235, 0.65);
}

/* ==========================================================================
   Character & Drop Cap Publishing Typography
   ========================================================================== */
.custom-char-style {
  display: inline-block;
  line-height: 1;
  transition: font-size 0.15s ease, color 0.15s ease;
}

.custom-char-style.drop-cap-large {
  float: left;
  line-height: 0.82;
  margin-right: 8px;
  margin-bottom: 2px;
  padding: 2px 4px 0 2px;
}

.char-color-chip {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  display: inline-block;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.char-color-chip:hover {
  transform: scale(1.3);
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.35);
}

/* ==========================================================================
   Freeze Artwork Layer & Controls
   ========================================================================== */
.art-sizer-frozen {
  opacity: 0.55;
  pointer-events: none !important;
  user-select: none;
  filter: grayscale(30%);
  transition: opacity 0.2s ease;
}

.canvas-artwork-layer.layer-frozen {
  pointer-events: none !important;
}

/* ==========================================================================
   Active Text Source Target Highlight & Formatting
   ========================================================================== */
.active-source-highlight {
  outline: 2px dashed #0d6efd !important;
  outline-offset: 4px;
  background-color: rgba(13, 110, 253, 0.05);
  border-radius: 4px;
  transition: outline 0.15s ease, background-color 0.15s ease;
}

/* ==========================================================================
   Spread Zoom Widget - Crisp High-Contrast Minus & Plus Glyphs Across Themes
   ========================================================================== */
#spreadZoomWidget button {
  transition: all 0.15s ease;
}

/* Light & Medium Modes: High-contrast crisp black fonts and bold glyphs */
[data-theme="light"] #spreadZoomWidget button,
[data-theme="medium"] #spreadZoomWidget button,
:root #spreadZoomWidget button {
  color: #111827 !important;
  font-weight: 700 !important;
  border-color: #6b7280 !important;
  background-color: #ffffff !important;
}

[data-theme="light"] #spreadZoomWidget button i,
[data-theme="medium"] #spreadZoomWidget button i,
:root #spreadZoomWidget button i {
  color: #111827 !important;
  -webkit-text-stroke: 0.65px #111827;
}

[data-theme="light"] #spreadZoomWidget button:hover,
[data-theme="medium"] #spreadZoomWidget button:hover,
:root #spreadZoomWidget button:hover {
  background-color: #f3f4f6 !important;
  color: #000000 !important;
  border-color: #374151 !important;
}

/* Dark Mode: Crisp, bright solid white fonts and bold glyphs */
[data-theme="dark"] #spreadZoomWidget button {
  color: #ffffff !important;
  font-weight: 700 !important;
  border-color: #64748b !important;
  background-color: #1e293b !important;
}

[data-theme="dark"] #spreadZoomWidget button i {
  color: #ffffff !important;
  -webkit-text-stroke: 0.65px #ffffff;
}

[data-theme="dark"] #spreadZoomWidget button:hover {
  background-color: #334155 !important;
  color: #ffffff !important;
  border-color: #94a3b8 !important;
}

/* Zoom Level Readout Label */
#lblSpreadZoom {
  font-weight: 700 !important;
  font-size: 0.74rem !important;
}
[data-theme="light"] #lblSpreadZoom,
[data-theme="medium"] #lblSpreadZoom,
:root #lblSpreadZoom {
  color: #111827 !important;
  background-color: #f9fafb !important;
  border-color: #6b7280 !important;
}
[data-theme="dark"] #lblSpreadZoom {
  color: #f1f5f9 !important;
  background-color: #0f172a !important;
  border-color: #64748b !important;
}

/* Reset / Fit Button */
#btnSpreadZoomReset {
  font-weight: 700 !important;
}

/* ==========================================================================
   Phase 1 Print Paperback vs Phase 2 E-Book Reflow Engine
   ========================================================================== */
.publishing-phase-btn {
  font-size: 0.74rem !important;
  transition: all 0.15s ease;
}

.publishing-phase-btn.active {
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Hide scrollbars across the book canvas in Phase 1 Print Mode */
.book-canvas-container,
.canvas-text-layer,
#canvasTextContentBox,
#canvasTextContentBoxRight,
#facingReaderLeftWrapper .canvas-text-layer,
#facingReaderRightWrapper .canvas-text-layer {
  scrollbar-width: none !important; /* Firefox */
  -ms-overflow-style: none !important; /* IE/Edge */
}
.book-canvas-container::-webkit-scrollbar,
.canvas-text-layer::-webkit-scrollbar,
#canvasTextContentBox::-webkit-scrollbar,
#canvasTextContentBoxRight::-webkit-scrollbar {
  display: none !important; /* Chrome, Safari, Opera */
}

/* Multilingual Self-Deterministic Spellcheck & Clean Canvas View */
[spellcheck="false"],
[data-spellcheck-active="false"] {
  -webkit-spell-check: none !important;
}

#dropdownSpellcheck .dropdown-item:hover,
#menuSpellcheck:hover {
  transition: all 0.15s ease-in-out;
}