/* ==========================================================================
   Gradedeck Live A4 Customizer & Print Engine
   PRISTINE LIGHT THEME: High-DPI Academic Document Formatter
   ========================================================================== */

:root {
  --doc-border-color: #1E3A8A;
  --doc-accent-color: #991B1B;
}

.customizer-layout {
  display: grid;
  grid-template-columns: 460px 1fr;
  gap: 2.5rem;
  padding: 2.5rem 0 5rem;
  align-items: start;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

/* Left Sidebar Controls */
.customizer-controls {
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 5.5rem;
  max-height: calc(100vh - 6.5rem);
  overflow-y: auto;
  min-width: 0;
  box-sizing: border-box;
}

.controls-header {
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.controls-header h2 {
  font-size: 1.35rem;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.controls-header p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Sidebar Mode Navigation Switcher */
.sidebar-mode-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: #F1F5F9;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 3px;
  margin-bottom: 1.35rem;
  gap: 3px;
}

.sidebar-mode-btn {
  border: none;
  background: transparent;
  padding: 0.55rem 0.25rem;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  text-align: center;
}

.sidebar-mode-btn svg {
  color: currentColor;
}

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

.sidebar-mode-btn.active {
  background: #FFFFFF;
  color: var(--accent-primary);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.08);
}

/* Sidebar Panels */
.sidebar-panel {
  display: none;
  animation: fadeInPanel 0.15s ease-out;
}

.sidebar-panel.active {
  display: block;
}

@keyframes fadeInPanel {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-section-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.control-group {
  margin-bottom: 1rem;
}

.control-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.control-group input, 
.control-group select,
.control-group textarea {
  width: 100%;
  background: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.control-group textarea {
  resize: vertical;
  line-height: 1.5;
  font-size: 0.85rem;
}

.control-group input:focus, 
.control-group select:focus,
.control-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}

.control-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

/* Color Swatches for Border/Theme */
.color-swatches {
  display: flex;
  gap: 0.55rem;
  margin-top: 0.4rem;
  flex-wrap: wrap;
}

.color-swatch-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid #FFFFFF;
  box-shadow: 0 0 0 1.5px var(--border-medium);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  padding: 0;
}

.color-swatch-btn:hover {
  transform: scale(1.12);
}

.color-swatch-btn.active {
  box-shadow: 0 0 0 2.5px var(--accent-primary);
  transform: scale(1.15);
}

/* Toggle Switch Component */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.75rem;
  background: #F8FAFC;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  margin-bottom: 0.85rem;
}

.toggle-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}

.switch {
  position: relative;
  display: inline-block;
  width: 42px;
  height: 24px;
  margin: 0;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: #CBD5E1;
  transition: .2s;
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .2s;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

input:checked + .slider {
  background-color: var(--accent-primary);
}

input:checked + .slider:before {
  transform: translateX(18px);
}

/* Custom Upload Dropzone */
.custom-img-dropzone {
  border: 2px dashed var(--border-medium);
  border-radius: var(--radius-md);
  padding: 1.15rem 1rem;
  text-align: center;
  cursor: pointer;
  background: #F8FAFC;
  transition: all var(--transition-fast);
  margin-top: 0.5rem;
}

.custom-img-dropzone:hover {
  border-color: var(--accent-primary);
  background: #EEF2FF;
}

/* Table of Contents Editor in Sidebar */
.toc-editor-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
  max-height: 310px;
  overflow-y: auto;
  padding-right: 4px;
}

.toc-editor-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  background: #F8FAFC;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.55rem;
  transition: background var(--transition-fast);
}

.toc-editor-row:hover {
  background: #FFFFFF;
  border-color: var(--border-medium);
}

.toc-row-sno {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-primary);
  min-width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #EEF2FF;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.toc-row-title-input {
  flex: 1;
  font-size: 0.82rem;
  padding: 0.35rem 0.55rem;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  background: #FFFFFF;
}

.toc-row-page-input {
  width: 65px;
  font-size: 0.82rem;
  padding: 0.35rem 0.45rem;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  background: #FFFFFF;
  text-align: center;
}

.toc-row-del-btn {
  background: none;
  border: none;
  color: #EF4444;
  cursor: pointer;
  padding: 3px 6px;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: background 0.15s ease;
}

.toc-row-del-btn:hover {
  background: #FEE2E2;
}

/* ==========================================================================
   Right A4 Preview Workspace & Standalone Page Tabs Bar
   ========================================================================== */
.a4-workspace {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

/* Segmented Page Selector Tabs Bar (Isolated Top Level) */
.page-tabs-bar {
  display: flex;
  width: 100%;
  max-width: 794px;
  background: #F1F5F9;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 5px;
  margin-bottom: 1rem;
  gap: 6px;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  box-sizing: border-box;
}

.page-tabs-bar::-webkit-scrollbar {
  display: none;
}

.page-tab-btn {
  flex: 1 0 auto;
  min-width: 90px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.6rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.page-tab-btn svg {
  flex-shrink: 0;
  color: currentColor;
}

.page-tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.5);
}

.page-tab-btn.active {
  background: #FFFFFF;
  color: var(--accent-primary);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.08);
}

/* Action & Status Toolbar */
.a4-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 794px;
  margin-bottom: 1.25rem;
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 0.75rem 1.25rem;
  box-shadow: var(--shadow-sm);
}

.a4-page-indicator {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.a4-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ==========================================================================
   Photorealistic A4 Sheet Dimensions (210mm x 297mm)
   ========================================================================== */
.a4-sheet-container {
  width: 100%;
  max-width: 794px;
  aspect-ratio: 1 / 1.414;
  background: #FFFFFF;
  color: #111827;
  border-radius: 3px;
  box-shadow: 0 20px 50px -10px rgba(15, 23, 42, 0.12), 0 0 0 1px rgba(15, 23, 42, 0.06);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 42px 46px;
  user-select: text;
  box-sizing: border-box;
}

/* ==========================================================================
   Live Preview Sample Watermark Banner (Monetization Gate)
   ========================================================================== */
.a4-preview-watermark-banner {
  display: none !important;
}

/* Unlocked status indicators */
body.unlocked-customizer #preview-status-pill {
  background: #ECFDF5 !important;
  color: #047857 !important;
  border: 1px solid #A7F3D0 !important;
}

body.unlocked-customizer #header-tier-badge {
  background: #ECFDF5 !important;
  color: #047857 !important;
}

/* ==========================================================================
   Academic Border System (6 High-DPI Styles)
   ========================================================================== */
.a4-academic-border {
  position: absolute;
  top: 16px;
  left: 16px;
  right: 16px;
  bottom: 16px;
  pointer-events: none;
  transition: all 0.15s ease;
}

/* 1. CBSE Classic Double Line */
.a4-academic-border.border-cbse-double {
  border: 3.5px solid var(--doc-border-color, #1E3A8A);
}
.a4-academic-border.border-cbse-double::after {
  content: '';
  position: absolute;
  top: 3.5px;
  left: 3.5px;
  right: 3.5px;
  bottom: 3.5px;
  border: 1px solid var(--doc-border-color, #1E3A8A);
  pointer-events: none;
}

/* 2. Ornate Corner Flourish Frame */
.a4-academic-border.border-ornate-corner {
  border: 2px solid var(--doc-border-color, #1E3A8A);
}
.a4-academic-border.border-ornate-corner::before {
  content: '';
  position: absolute;
  top: 5px;
  left: 5px;
  right: 5px;
  bottom: 5px;
  border: 1px solid var(--doc-border-color, #1E3A8A);
  pointer-events: none;
}
.corner-flourish {
  position: absolute;
  width: 32px;
  height: 32px;
  color: var(--doc-border-color, #1E3A8A);
}
.corner-tl { top: -2px; left: -2px; }
.corner-tr { top: -2px; right: -2px; transform: scaleX(-1); }
.corner-bl { bottom: -2px; left: -2px; transform: scaleY(-1); }
.corner-br { bottom: -2px; right: -2px; transform: scale(-1); }

/* 3. Certificate Decorative Frame */
.a4-academic-border.border-certificate-frame {
  border: 5px double var(--doc-border-color, #1E3A8A);
}
.a4-academic-border.border-certificate-frame::after {
  content: '';
  position: absolute;
  top: 5px;
  left: 5px;
  right: 5px;
  bottom: 5px;
  border: 1px dashed var(--doc-border-color, #1E3A8A);
  opacity: 0.55;
  pointer-events: none;
}

/* 4. Modern Minimalist Frame */
.a4-academic-border.border-modern-minimal {
  border: 1.5px solid var(--doc-border-color, #1E3A8A);
}
.a4-academic-border.border-modern-minimal::after {
  content: '';
  position: absolute;
  top: 5px;
  left: 5px;
  right: 5px;
  bottom: 5px;
  border: 0.5px solid var(--doc-border-color, #1E3A8A);
  opacity: 0.4;
  pointer-events: none;
}

/* 5. Bold Executive Frame */
.a4-academic-border.border-bold-executive {
  border: 3.5px solid var(--doc-border-color, #1E3A8A);
}
.a4-academic-border.border-bold-executive::before,
.a4-academic-border.border-bold-executive::after {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--doc-border-color, #1E3A8A);
}
.a4-academic-border.border-bold-executive::before { top: 4px; left: 4px; }
.a4-academic-border.border-bold-executive::after { bottom: 4px; right: 4px; }

/* 6. Triple Stripe Rule */
.a4-academic-border.border-triple-rule {
  border: 1px solid var(--doc-border-color, #1E3A8A);
  outline: 2.5px solid var(--doc-border-color, #1E3A8A);
  outline-offset: 3px;
  box-shadow: 0 0 0 6px #FFFFFF, 0 0 0 7.5px var(--doc-border-color, #1E3A8A);
}

/* 7. No Border */
.a4-academic-border.border-none {
  display: none;
}

/* ==========================================================================
   A4 Sheet Typography & Inner Layout
   ========================================================================== */
:root {
  --graphic-width: 280px;
  --print-graphic-width: 74mm;
  --title-size: 1.85rem;
  --print-title-size: 23pt;
  --school-size: 1.85rem;
  --print-school-size: 24pt;
  --crest-size: 92px;
  --print-crest-size: 30mm;
}

.a4-header {
  text-align: center;
  margin-bottom: 14px;
}

.a4-crest-img {
  width: var(--crest-size, 92px);
  height: var(--crest-size, 92px);
  object-fit: contain;
  margin: 0 auto 10px;
  display: block;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.08));
  transition: width 0.15s ease, height 0.15s ease;
}

.a4-school-name {
  font-family: var(--font-display);
  font-size: var(--school-size, 1.85rem);
  font-weight: 800;
  color: var(--doc-border-color, #1E3A8A);
  text-align: center;
  line-height: 1.25;
  text-transform: uppercase;
  margin-bottom: 5px;
  letter-spacing: 0.025em;
  transition: font-size 0.15s ease;
}

.a4-school-sub {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: #374151;
  font-weight: 500;
  text-align: center;
  margin-bottom: 14px;
}

.a4-divider-line {
  width: 220px;
  height: 2.5px;
  background: var(--doc-border-color, #1E3A8A);
  margin: 0 auto 16px;
  opacity: 0.85;
}

.a4-project-focus {
  text-align: center;
  margin: 12px 0 16px;
}

.a4-project-subject {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--doc-accent-color, #991B1B);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.a4-project-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: #64748B;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.a4-project-title {
  font-family: var(--font-academic);
  font-size: var(--title-size, 1.85rem);
  font-weight: 800;
  color: #111827;
  line-height: 1.35;
  margin-bottom: 10px;
  padding: 0 12px;
  transition: font-size 0.15s ease;
}

.a4-academic-session {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: #334155;
}

/* Center Illustration / Graphic Zone */
.a4-center-graphic-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 14px auto 12px;
  text-align: center;
  width: 100%;
}

.a4-illustration-frame {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--graphic-width, 280px);
  max-width: 92%;
  position: relative;
  transition: width 0.15s ease;
}

/* When card frame is active */
.a4-illustration-frame.has-card {
  background: #FFFFFF;
  border: 1.5px solid var(--border-subtle);
  border-radius: 10px;
  padding: 10px 14px;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
}

/* When frameless/clean transparent is active */
.a4-illustration-frame.frameless {
  background: transparent !important;
  border: none !important;
  border-radius: 0 !important;
  padding: 0 !important;
  box-shadow: none !important;
}

/* Legacy size class fallbacks */
.a4-illustration-frame.size-compact { width: 180px; }
.a4-illustration-frame.size-balanced { width: 280px; }
.a4-illustration-frame.size-prominent { width: 380px; }

.a4-illustration-frame svg {
  width: 100%;
  height: auto;
  max-height: 250px;
  display: block;
}

.a4-illustration-frame img {
  width: 100%;
  height: auto;
  max-height: 250px;
  object-fit: contain;
  display: block;
}

.a4-illustration-caption {
  font-size: 0.78rem;
  color: #4B5563;
  font-style: italic;
  margin-top: 8px;
  font-family: var(--font-body);
  max-width: 420px;
  font-weight: 500;
}

/* Submission Details Footer Grid */
.a4-submission-grid {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  width: 100%;
  padding: 18px 12px 0;
  font-size: 0.98rem;
  color: #1F2937;
  line-height: 1.6;
  border-top: 1.5px dashed rgba(15, 23, 42, 0.12);
}

.a4-submitted-col {
  width: 48%;
}

.a4-col-title {
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  color: var(--doc-border-color, #1E3A8A);
  margin-bottom: 6px;
}

.a4-col-row {
  font-size: 0.95rem;
  color: #374151;
  margin-bottom: 2px;
}

/* Certificate & Acknowledgement Bodies */
.a4-certificate-body {
  font-size: 1.08rem;
  line-height: 1.95;
  color: #1F2937;
  text-align: justify;
  margin: 18px 0 28px;
}

.a4-sign-grid {
  margin-top: auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  width: 100%;
  text-align: center;
  padding-top: 25px;
}

.a4-sign-box {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.a4-sign-line {
  width: 100%;
  border-bottom: 1px solid #111827;
  margin-bottom: 6px;
}

.a4-sign-label {
  font-size: 0.86rem;
  color: #374151;
  font-weight: 600;
  line-height: 1.4;
}

/* Table of Contents / Index Table */
.a4-index-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.98rem;
}

.a4-index-table th {
  border: 1px solid var(--doc-border-color, #1E3A8A);
  background: #F1F5F9;
  color: var(--doc-border-color, #1E3A8A);
  padding: 10px 12px;
  font-weight: 700;
  text-align: left;
}

.a4-index-table td {
  border: 1px solid #CBD5E1;
  padding: 8px 12px;
  color: #1F2937;
  vertical-align: middle;
}

.a4-index-table tr:nth-child(even) td {
  background: #F8FAFC;
}

/* Document Font Pairings */
.font-classic .a4-project-title,
.doc-font-cinzel .a4-project-title { font-family: var(--font-academic); }

.font-modern .a4-project-title,
.doc-font-outfit .a4-project-title { font-family: var(--font-display); font-weight: 800; }

.font-traditional .a4-project-title,
.doc-font-times .a4-project-title { font-family: Georgia, 'Times New Roman', serif; font-weight: 700; }

/* Front Cover Layout Variants */
.layout-modern .a4-project-focus {
  background: #F8FAFC;
  border-radius: var(--radius-md);
  padding: 12px;
  border: 1px solid var(--border-subtle);
}

.layout-formal .a4-project-title {
  border: 1.5px solid var(--doc-border-color, #1E3A8A);
  padding: 10px 14px;
  border-radius: 4px;
  background: #FAFAFC;
}

/* ==========================================================================
   High-Precision Vector A4 Print Engine
   Zero-Margin Vector Document Calibration (Eliminates Browser Header/Footer)
   ========================================================================== */
@page {
  size: 210mm 297mm;
  margin: 0mm;
}

/* Hidden by default on screen */
.multi-page-print-container {
  display: none;
}

@media print {
  /* Force exact color reproduction and disable browser header/footer margins */
  *, *::before, *::after {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
    color-adjust: exact !important;
  }

  html, body {
    margin: 0 !important;
    padding: 0 !important;
    width: 210mm !important;
    height: auto !important;
    min-height: 297mm !important;
    background: #FFFFFF !important;
    color: #111827 !important;
    font-size: 11pt !important;
    overflow: visible !important;
    box-sizing: border-box !important;
  }

  /* Aggressively suppress ALL web chrome, headers, navigation, toolbars, and floating widgets */
  .main-nav, 
  .top-announcement, 
  .customizer-controls, 
  .a4-toolbar, 
  .page-tabs-bar, 
  .site-footer,
  .no-print,
  #gd-social-toast,
  #gd-whatsapp-float,
  .gd-floating-whatsapp,
  .gd-conversion-toast,
  a[href*="wa.me"],
  iframe,
  button,
  .mobile-menu-btn {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
  }

  .customizer-layout {
    display: block !important;
    padding: 0 !important;
    margin: 0 !important;
    border: none !important;
    box-shadow: none !important;
  }

  .a4-workspace {
    display: block !important;
    width: 210mm !important;
    max-width: 210mm !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  /* Single Page vs Multi-Page Print Visibility */
  body.printing-all-pages #a4-print-target {
    display: none !important;
  }
  body.printing-all-pages .multi-page-print-container {
    display: block !important;
  }

  /* True Physical A4 Sheet in Print (210mm × 297mm) */
  .a4-sheet-container {
    width: 210mm !important;
    min-width: 210mm !important;
    max-width: 210mm !important;
    height: 297mm !important;
    min-height: 297mm !important;
    max-height: 297mm !important;
    margin: 0 !important;
    padding: 18mm 20mm !important;
    box-sizing: border-box !important;
    box-shadow: none !important;
    border: none !important;
    border-radius: 0 !important;
    position: relative !important;
    display: flex !important;
    flex-direction: column !important;
    overflow: hidden !important;
    background: #FFFFFF !important;
    page-break-after: always !important;
    break-after: page !important;
    page-break-inside: avoid !important;
    break-inside: avoid !important;
  }

  /* Avoid trailing blank page on last sheet */
  .a4-sheet-container:last-child {
    page-break-after: avoid !important;
    break-after: avoid !important;
  }

  /* Preview Watermark in Print: Prominently printed if unpaid, fully hidden if unlocked */
  body:not(.unlocked-customizer) .a4-preview-watermark-banner {
    display: block !important;
    position: absolute !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%) rotate(-35deg) !important;
    width: 140% !important;
    font-size: 16pt !important;
    font-weight: 800 !important;
    color: rgba(220, 38, 38, 0.32) !important;
    border-top: 2pt dashed rgba(220, 38, 38, 0.38) !important;
    border-bottom: 2pt dashed rgba(220, 38, 38, 0.38) !important;
    padding: 8pt 0 !important;
    z-index: 9999 !important;
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }

  body.unlocked-customizer .a4-preview-watermark-banner {
    display: none !important;
  }

  /* Print Academic Border Placement */
  .a4-academic-border {
    position: absolute !important;
    top: 9mm !important;
    left: 9mm !important;
    right: 9mm !important;
    bottom: 9mm !important;
    pointer-events: none !important;
  }

  .a4-academic-border.border-cbse-double {
    border: 3.5pt solid var(--doc-border-color, #1E3A8A) !important;
  }
  .a4-academic-border.border-cbse-double::after {
    top: 3.5pt !important;
    left: 3.5pt !important;
    right: 3.5pt !important;
    bottom: 3.5pt !important;
    border: 1pt solid var(--doc-border-color, #1E3A8A) !important;
  }

  .a4-header {
    margin-bottom: 5mm !important;
  }

  .a4-crest-img {
    width: var(--print-crest-size, 30mm) !important;
    height: var(--print-crest-size, 30mm) !important;
    object-fit: contain !important;
    margin: 0 auto 3.5mm !important;
  }

  .a4-school-name {
    font-size: var(--print-school-size, 24pt) !important;
    line-height: 1.25 !important;
    margin-bottom: 2.5mm !important;
    letter-spacing: 0.02em !important;
  }

  .a4-school-sub {
    font-size: 10pt !important;
    margin-bottom: 3.5mm !important;
  }

  .a4-divider-line {
    width: 65mm !important;
    height: 1mm !important;
    margin: 0 auto 4.5mm !important;
  }

  .a4-project-subject {
    font-size: 16.5pt !important;
    margin-bottom: 2.5mm !important;
    letter-spacing: 0.08em !important;
  }

  .a4-project-label {
    font-size: 9.5pt !important;
    letter-spacing: 0.08em !important;
    margin-bottom: 1.5mm !important;
  }

  .a4-project-title {
    font-size: var(--print-title-size, 23pt) !important;
    line-height: 1.35 !important;
    margin-bottom: 3.5mm !important;
  }

  .a4-academic-session {
    font-size: 11pt !important;
  }

  .a4-center-graphic-zone {
    margin: 6mm auto !important;
    width: 100% !important;
  }

  .a4-illustration-frame {
    width: var(--print-graphic-width, 76mm) !important;
    max-width: 140mm !important;
  }

  .a4-illustration-frame.has-card {
    padding: 3mm 4mm !important;
    border: 0.4mm solid #CBD5E1 !important;
    background: #FFFFFF !important;
    box-shadow: none !important;
  }

  .a4-illustration-frame.frameless {
    border: none !important;
    padding: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  .a4-illustration-frame svg,
  .a4-illustration-frame img {
    max-height: 65mm !important;
    width: 100% !important;
    height: auto !important;
  }

  .a4-illustration-caption {
    font-size: 8.5pt !important;
    margin-top: 2.5mm !important;
  }

  .a4-submission-grid {
    margin-top: auto !important;
    padding-top: 6mm !important;
    font-size: 11.5pt !important;
    line-height: 1.6 !important;
    border-top: 0.4mm dashed #94A3B8 !important;
  }

  .a4-col-title {
    font-size: 10.5pt !important;
    margin-bottom: 1.5mm !important;
  }

  .a4-col-row {
    font-size: 11pt !important;
  }

  .a4-certificate-body {
    font-size: 12.5pt !important;
    line-height: 1.95 !important;
    margin: 6mm 0 8mm !important;
  }

  .a4-sign-grid {
    margin-top: auto !important;
    padding-top: 8mm !important;
  }

  .a4-sign-label {
    font-size: 10pt !important;
  }

  .a4-index-table {
    font-size: 11pt !important;
  }

  .a4-index-table th,
  .a4-index-table td {
    padding: 3.2mm 4mm !important;
  }
}


/* Mobile One-Tap Jump Switcher Bar */
.mobile-jump-bar {
  display: none;
}

.size-presets-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  width: 100%;
  box-sizing: border-box;
}

/* ==========================================================================
   Responsive Adaptations (320px - 990px)
   ========================================================================== */
@media (max-width: 990px) {
  .customizer-layout {
    grid-template-columns: minmax(0, 1fr) !important;
    gap: 1.75rem;
    padding: 1.25rem 0 3.5rem;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }
  .customizer-controls {
    position: static;
    max-height: none;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
  }
  .a4-workspace {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
  }
  .mobile-jump-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 1.15rem;
    width: 100%;
    box-sizing: border-box;
  }
  .mobile-jump-bar .btn {
    flex: 1;
    min-height: 40px;
    font-size: 0.82rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    padding: 0.55rem 0.65rem;
  }
  .btn-jump-active {
    background: #EEF2FF;
    color: var(--accent-primary);
    border: 1px solid rgba(79, 70, 229, 0.25);
  }
  .btn-jump-preview {
    background: var(--accent-primary);
    color: #FFFFFF;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.22);
  }
  .mobile-jump-bar-workspace {
    margin-bottom: 0.85rem;
  }
}

@media (max-width: 640px) {
  .customizer-controls {
    padding: 1.1rem 0.85rem;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
    overflow-x: hidden;
  }

  .controls-header h2 {
    font-size: 1.2rem;
  }

  .controls-header p {
    font-size: 0.8rem;
  }

  .control-row {
    grid-template-columns: 1fr !important;
    gap: 0.75rem;
    width: 100%;
    min-width: 0;
  }

  .control-group {
    width: 100%;
    min-width: 0;
  }

  .control-group input,
  .control-group select,
  .control-group textarea {
    font-size: 16px !important;
    min-height: 44px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }

  .btn-full {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    font-size: 0.84rem;
    padding: 0.7rem 0.8rem;
    white-space: normal;
    word-break: break-word;
  }

  /* Segmented Page Tabs Bar */
  .page-tabs-bar {
    width: 100%;
    max-width: 100%;
    padding: 4px;
    gap: 5px;
    box-sizing: border-box;
  }

  .page-tab-btn {
    flex: 0 0 auto;
    min-width: auto;
    min-height: 40px;
    padding: 0.5rem 0.75rem;
    font-size: 0.78rem;
    gap: 0.35rem;
  }

  /* Toolbar */
  .a4-toolbar {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
    padding: 0.75rem 0.85rem;
  }

  .a4-page-indicator {
    flex-wrap: wrap;
    gap: 0.4rem;
    font-size: 0.76rem;
  }

  .a4-actions {
    width: 100%;
    display: flex;
    gap: 0.5rem;
  }

  .a4-actions .btn {
    flex: 1;
    font-size: 0.78rem;
    padding: 0.5rem 0.45rem;
    min-height: 38px;
  }

  /* Photorealistic A4 Sheet Container on Mobile Screens */
  .a4-sheet-container {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    padding: 24px 18px !important;
    aspect-ratio: auto !important;
    min-height: 460px !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
    box-shadow: 0 6px 20px -4px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(15, 23, 42, 0.06) !important;
  }

  .a4-academic-border {
    top: 8px !important;
    left: 8px !important;
    right: 8px !important;
    bottom: 8px !important;
  }

  /* Typography Scale Down on Screen Viewports */
  .a4-school-name {
    font-size: clamp(0.92rem, 4.2vw, 1.25rem) !important;
    line-height: 1.25 !important;
    word-break: break-word !important;
  }

  .a4-crest-img {
    width: clamp(48px, 13vw, 68px) !important;
    height: clamp(48px, 13vw, 68px) !important;
  }

  .a4-project-title {
    font-size: clamp(1rem, 4.8vw, 1.35rem) !important;
    line-height: 1.25 !important;
    word-break: break-word !important;
  }

  .a4-project-subject {
    font-size: clamp(0.8rem, 3.2vw, 0.98rem) !important;
    word-break: break-word !important;
  }

  .a4-illustration-frame {
    max-width: 86% !important;
    margin: 0.4rem auto !important;
  }

  .a4-illustration-caption {
    font-size: 0.7rem !important;
    line-height: 1.35 !important;
  }

  .a4-submission-grid {
    flex-direction: column !important;
    gap: 0.75rem !important;
    padding-top: 0.75rem !important;
    margin-top: 0.75rem !important;
  }

  .a4-submission-col {
    width: 100% !important;
  }

  .a4-submission-col.teacher-col {
    text-align: left !important;
  }

  .a4-sub-label {
    font-size: 0.65rem !important;
    margin-bottom: 2px !important;
  }

  .a4-sub-details {
    font-size: 0.78rem !important;
    line-height: 1.4 !important;
  }

  .a4-doc-body {
    font-size: 0.8rem !important;
    line-height: 1.45 !important;
    margin: 0.65rem 0 !important;
  }

  .a4-sign-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 0.6rem !important;
    padding-top: 12px !important;
  }

  .a4-sign-col:last-child {
    grid-column: span 2;
  }

  .a4-sign-line {
    width: 80% !important;
    margin: 0 auto 4px !important;
  }

  .a4-sign-label {
    font-size: 0.65rem !important;
  }

  .a4-index-table {
    font-size: 0.72rem !important;
  }

  .a4-index-table th,
  .a4-index-table td {
    padding: 5px 3px !important;
  }

  .a4-preview-watermark-banner {
    font-size: 0.75rem !important;
    letter-spacing: 0.1em !important;
    width: 120% !important;
  }
}

@media (max-width: 480px) {
  /* 2x2 Segmented Mode Switcher for Mobile Screens */
  .sidebar-mode-tabs {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 5px !important;
    padding: 5px !important;
  }

  .sidebar-mode-btn {
    flex-direction: row !important;
    justify-content: center !important;
    align-items: center !important;
    gap: 6px !important;
    padding: 0.55rem 0.4rem !important;
    font-size: 0.78rem !important;
    white-space: nowrap !important;
  }

  .sidebar-mode-btn svg {
    width: 14px !important;
    height: 14px !important;
    flex-shrink: 0 !important;
  }

  .size-presets-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 5px !important;
  }

  #btn-unlock-main {
    font-size: 0.8rem !important;
    padding: 0.65rem 0.6rem !important;
  }

  #btn-print-action {
    font-size: 0.78rem !important;
    padding: 0.65rem 0.6rem !important;
  }

  #btn-print-sample {
    font-size: 0.72rem !important;
  }
}

@media (max-width: 380px) {
  .customizer-controls {
    padding: 0.85rem 0.65rem !important;
  }

  .a4-sheet-container {
    padding: 14px 10px !important;
  }

  .page-tab-btn {
    padding: 0.45rem 0.6rem !important;
    font-size: 0.74rem !important;
  }
}