/* ==========================================================================
   PrivaPDF Platform Suite - Stylesheet & Dark Blue Design Tokens
   ========================================================================== */

:root {
  --color-primary: #1E40AF;
  --color-primary-hover: #1D4ED8;
  --color-primary-light: #EFF6FF;
  --color-primary-subtle: rgba(30, 64, 175, 0.08);

  --color-bg-body: #F5F7FA;
  --color-bg-card: #FFFFFF;
  --color-bg-surface: #FFFFFF;
  --color-bg-header: rgba(255, 255, 255, 0.92);
  --color-bg-input: #F8FAFC;

  --color-text-main: #1E293B;
  --color-text-muted: #64748B;
  --color-text-subtle: #94A3B8;

  --color-border: #E2E8F0;
  --color-border-hover: #CBD5E1;

  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-info: #3B82F6;

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.06), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 16px 32px -4px rgba(0, 0, 0, 0.08), 0 6px 12px -2px rgba(0, 0, 0, 0.04);
  --shadow-modal: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --color-primary: #3B82F6;
  --color-primary-hover: #60A5FA;
  --color-primary-light: rgba(59, 130, 246, 0.22);
  --color-primary-subtle: rgba(59, 130, 246, 0.12);

  --color-bg-body: #0F172A;
  --color-bg-card: #1E293B;
  --color-bg-surface: #1E293B;
  --color-bg-header: rgba(15, 23, 42, 0.94);
  --color-bg-input: #0F172A;

  --color-text-main: #F1F5F9;
  --color-text-muted: #94A3B8;
  --color-text-subtle: #64748B;

  --color-border: #334155;
  --color-border-hover: #475569;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 32px -4px rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-body);
  color: var(--color-text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg-header);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: 64px;
}

.header-inner {
  max-width: 1320px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text-main);
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-name strong {
  color: var(--color-primary);
}

.badge-private {
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-item {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-item:hover {
  color: var(--color-primary);
}

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

.privacy-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 5px 12px;
  border-radius: var(--radius-full);
}

.theme-toggle-btn {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
  padding: 48px 24px 32px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg-surface) 0%, var(--color-bg-body) 100%);
}

.hero-container {
  max-width: 900px;
  margin: 0 auto;
}

.hero-chips-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.hero-chip {
  display: inline-flex;
  align-items: center;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #1E40AF;
  background: #EFF6FF;
  border: 1px solid rgba(30, 64, 175, 0.2);
  padding: 5px 14px;
  border-radius: var(--radius-full);
}

[data-theme="dark"] .hero-chip {
  color: #93C5FD !important;
  background: rgba(59, 130, 246, 0.22) !important;
  border-color: rgba(147, 197, 253, 0.45) !important;
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.25);
}

.hero-chip-subtle {
  display: inline-flex;
  align-items: center;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 5px 14px;
  border-radius: var(--radius-full);
}

[data-theme="dark"] .hero-chip-subtle {
  color: #CBD5E1 !important;
  background: rgba(255, 255, 255, 0.06) !important;
  border-color: rgba(255, 255, 255, 0.14) !important;
}

.hero-title {
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text-main);
  line-height: 1.2;
  margin-bottom: 14px;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 720px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

.search-bar-wrap {
  max-width: 600px;
  margin: 0 auto 28px;
}

.search-bar {
  display: flex;
  align-items: center;
  background: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 8px 16px;
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-bar:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-subtle);
}

.search-icon {
  color: var(--color-text-subtle);
  margin-right: 12px;
}

.search-bar input {
  flex: 1;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 1rem;
  color: var(--color-text-main);
  outline: none;
}

.search-shortcut {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-subtle);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  padding: 2px 6px;
  border-radius: 4px;
}

.category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 16px;
}

.cat-tab {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cat-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.cat-tab.active {
  background: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(30, 64, 175, 0.35);
}

/* ==========================================================================
   Tools Grid & Cards
   ========================================================================== */

.main-content {
  flex: 1;
  padding: 24px 24px 64px;
}

.tools-container {
  max-width: 1320px;
  margin: 0 auto;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.tool-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.tool-card-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: transform var(--transition-fast);
}

.tool-card:hover .tool-card-icon-wrap {
  transform: scale(1.08);
}

.tool-card-icon-wrap svg {
  width: 26px;
  height: 26px;
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

[data-theme="dark"] .tool-card-icon-wrap {
  background: rgba(59, 130, 246, 0.2) !important;
  border: 1px solid rgba(96, 165, 250, 0.35);
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.15);
}

[data-theme="dark"] .tool-card-icon-wrap svg {
  color: #60A5FA !important;
  filter: drop-shadow(0 0 5px rgba(96, 165, 250, 0.5));
}

[data-theme="dark"] .tool-card:hover .tool-card-icon-wrap svg {
  color: #93C5FD !important;
}

.tool-card-category {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-subtle);
  margin-bottom: 6px;
}

.tool-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.tool-card-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  flex: 1;
}

.tool-card-footer {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
}

.tool-card-engine {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-subtle);
}

.tool-card-arrow {
  color: var(--color-primary);
  opacity: 0;
  transform: translateX(-4px);
  transition: all var(--transition-fast);
}

.tool-card:hover .tool-card-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ==========================================================================
   Modal & Interactive Workspace
   ========================================================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(6px);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
  animation: modalFadeIn 200ms ease-out forwards;
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-modal);
  animation: modalSlideUp 220ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
}

.modal-tool-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-tool-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.modal-tool-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.modal-tool-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--color-text-subtle);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  background: var(--color-bg-body);
  color: var(--color-text-main);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Dropzone */
.dropzone {
  border: 2px dashed var(--color-border-hover);
  border-radius: var(--radius-md);
  background: var(--color-bg-input);
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.dropzone-icon {
  margin-bottom: 12px;
}

.dropzone-text {
  font-size: 1rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.dropzone-primary {
  color: var(--color-primary);
  font-weight: 700;
}

.dropzone-hint {
  font-size: 0.8rem;
  color: var(--color-text-subtle);
  margin-top: 6px;
}

/* File list */
.selected-files-wrap {
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}

.selected-files-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.clear-files-btn {
  background: none;
  border: none;
  color: var(--color-primary);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
}

.clear-files-btn:hover {
  text-decoration: underline;
}

.file-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 160px;
  overflow-y: auto;
}

.file-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-bg-card);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  font-size: 0.85rem;
}

.file-info {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
}

.file-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 320px;
}

.file-size {
  color: var(--color-text-subtle);
  font-size: 0.75rem;
}

/* Tool Options Panel */
.tool-options-panel {
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.option-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.option-input {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  color: var(--color-text-main);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
}

.option-input:focus {
  border-color: var(--color-primary);
}

.option-slider-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.option-slider {
  flex: 1;
  accent-color: var(--color-primary);
}

.btn-group {
  display: flex;
  gap: 8px;
}

.btn-option {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

/* Progress Bar */
.processing-bar-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.processing-status {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.progress-bar-track {
  height: 6px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--color-primary);
  transition: width 200ms ease;
}

/* Result Area */
.result-area {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.result-success-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #059669;
}

.result-content {
  font-size: 0.88rem;
  color: var(--color-text-main);
}

/* Modal Footer */
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

.btn-cancel {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-cancel:hover {
  background: var(--color-bg-body);
  color: var(--color-text-main);
}

.btn-primary {
  background: var(--color-primary);
  color: #FFFFFF;
  border: none;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 8px rgba(30, 64, 175, 0.35);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toastIn 200ms ease forwards;
}

@keyframes toastIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.toast-success {
  border-left: 4px solid var(--color-success);
}

.toast-error {
  border-left: 4px solid var(--color-primary);
}

/* Footer */
.site-footer {
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  padding: 32px 24px;
  margin-top: auto;
}

.footer-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-info p {
  font-size: 0.88rem;
  color: var(--color-text-main);
}

.footer-subtext {
  color: var(--color-text-subtle) !important;
  font-size: 0.78rem !important;
  margin-top: 4px;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
  .nav-links {
    display: none;
  }
  .tools-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

/* ==========================================================================
   Advanced Interactive Tools: Signature Pad, Camera, Page Grid, Diff
   ========================================================================== */

/* Signature Pad */
.signature-pad-wrap {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px;
}

.signature-canvas {
  width: 100%;
  height: 160px;
  background: #FFFFFF;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-sm);
  cursor: crosshair;
  touch-action: none;
}

.signature-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.signature-colors {
  display: flex;
  gap: 8px;
}

.sig-color-btn {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.sig-color-btn.active {
  transform: scale(1.15);
  border-color: var(--color-primary);
}

/* Camera Scanner */
.camera-scanner-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px;
}

.camera-video {
  width: 100%;
  max-height: 240px;
  background: #000000;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

.camera-controls {
  display: flex;
  gap: 10px;
  align-items: center;
  width: 100%;
  justify-content: center;
}

.camera-thumbs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  max-width: 100%;
  padding: 6px 0;
}

.camera-thumb-img {
  width: 50px;
  height: 65px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--color-border);
}

/* Page Organizer Grid */
.organize-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 12px;
  max-height: 240px;
  overflow-y: auto;
  padding: 10px;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.organize-page-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  transition: all var(--transition-fast);
}

.organize-page-card.deleted {
  opacity: 0.35;
  filter: grayscale(1);
}

.organize-thumb {
  width: 100%;
  height: 120px;
  object-fit: contain;
  background: #FAFAFA;
  border-radius: 3px;
}

.organize-page-num {
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: 4px;
  color: var(--color-text-muted);
}

.organize-actions {
  display: flex;
  gap: 4px;
  margin-top: 4px;
}

.organize-btn {
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
  border-radius: 3px;
  padding: 2px 6px;
  font-size: 0.7rem;
  cursor: pointer;
}

.organize-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Text & Code Diff */
.diff-container {
  max-height: 200px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.4;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-input);
  padding: 8px 12px;
}

.diff-line {
  white-space: pre-wrap;
  padding: 2px 4px;
  border-radius: 2px;
}

.diff-add {
  background: rgba(16, 185, 129, 0.15);
  color: #059669;
}

.diff-del {
  background: rgba(229, 50, 45, 0.15);
  color: #E5322D;
}

.diff-same {
  color: var(--color-text-muted);
}

/* ==========================================================================
   PrivaPDF Branding, Platform Chip, AdSense, Update Modal & Credits
   ========================================================================== */

/* Brand & Author Badge */
.badge-author {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.platform-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.platform-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.6);
}

.update-check-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.update-check-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.nav-btn-link, .footer-link-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition-fast);
  padding: 0;
}

.nav-btn-link:hover, .footer-link-btn:hover {
  color: var(--color-primary);
}

/* AdSense Banner Containers */
.adsense-wrap {
  max-width: 1320px;
  margin: 12px auto;
  padding: 0 24px;
}

.adsense-container {
  background: var(--color-bg-card);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px;
  text-align: center;
  min-height: 90px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
}

.adsense-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-subtle);
  margin-top: 4px;
}

/* Small Modals */
.modal-card-sm {
  max-width: 520px;
}

/* Update Modal */
.update-status-box {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
}

.update-spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.update-info h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.update-info p {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.version-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  margin-top: 8px;
  color: var(--color-text-subtle);
}

.badge-version {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 600;
  color: var(--color-primary);
}

.changelog-box {
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-top: 14px;
}

.changelog-box h4 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.changelog-box ul {
  padding-left: 18px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Credits Card in About Modal */
.credits-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}

.credits-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.credits-label {
  color: var(--color-text-muted);
}

.credits-value a {
  color: var(--color-primary);
  text-decoration: none;
}

.credits-value a:hover {
  text-decoration: underline;
}

.footer-credits {
  font-size: 0.84rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.footer-credits a {
  color: var(--color-primary);
  text-decoration: none;
}

/* ==========================================================================
   Top Announcement Bar (Web Version - Desktop Download Banner)
   ========================================================================== */

.top-announcement-bar {
  background: linear-gradient(90deg, #0F172A 0%, #1E3A8A 50%, #0F172A 100%);
  color: #FFFFFF;
  padding: 8px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.85rem;
  position: relative;
  z-index: 102;
}

.announcement-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.announcement-message {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  color: #E2E8F0;
}

.announcement-badge {
  background: #2563EB;
  color: #FFFFFF;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  display: inline-block;
  box-shadow: 0 0 8px rgba(37, 99, 235, 0.5);
}

.announcement-buttons {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-download-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.btn-pill-mac {
  background: #FFFFFF;
  color: #0F172A;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.btn-pill-mac:hover {
  background: #F1F5F9;
  transform: translateY(-1px);
}

.btn-pill-win {
  background: rgba(255, 255, 255, 0.12);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-pill-win:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .top-announcement-bar {
    display: none;
  }
}

/* ==========================================================================
   DESKTOP STUDIO APP ARCHITECTURE & NATIVE WORKSPACE LAYOUT
   ========================================================================== */

/* By default (Web version), hide desktop-only studio elements */
.desktop-only {
  display: none !important;
}

/* In Desktop App Mode (body.is-desktop-app) */
body.is-desktop-app {
  height: 100vh;
  overflow: hidden;
  background-color: var(--color-bg-body);
}

body.is-desktop-app .web-only {
  display: none !important;
}

body.is-desktop-app .desktop-only {
  display: flex !important;
}

/* Desktop Titlebar */
.desktop-titlebar {
  display: none;
  height: 52px;
  background: var(--color-bg-header);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
  -webkit-app-region: drag;
  user-select: none;
}

body.is-desktop-app .desktop-titlebar {
  display: flex !important;
}

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

/* macOS Traffic Light Spacer */
.mac-traffic-light-spacer {
  display: none;
}

body.platform-darwin .mac-traffic-light-spacer {
  display: block;
  width: 76px;
  height: 100%;
}

.titlebar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.titlebar-app-name {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  gap: 6px;
}

.titlebar-studio-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: #2563EB;
  color: #FFFFFF;
  padding: 2px 7px;
  border-radius: var(--radius-full);
}

.desktop-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  font-weight: 600;
  color: #059669;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 3px 9px;
  border-radius: var(--radius-full);
}

.status-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.7);
}

/* Center Search */
.titlebar-center {
  flex: 1;
  max-width: 420px;
  margin: 0 16px;
}

.desktop-search-wrap {
  display: flex;
  align-items: center;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 6px 12px;
  transition: all var(--transition-fast);
  -webkit-app-region: no-drag;
}

.desktop-search-wrap:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-subtle);
}

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

.desktop-search-wrap input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--color-text-main);
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
}

.desktop-search-kbd {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-subtle);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 2px 5px;
  border-radius: 4px;
}

/* Right Controls */
.titlebar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  -webkit-app-region: no-drag;
}

.titlebar-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.titlebar-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Studio Workspace Shell */
body.is-desktop-app .studio-app-shell {
  display: flex !important;
  flex: 1;
  height: calc(100vh - 52px);
  overflow: hidden;
}

/* Desktop Sidebar */
.desktop-sidebar {
  width: 250px;
  min-width: 250px;
  background: var(--color-bg-card);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  padding: 18px 12px 14px;
  overflow-y: auto;
  user-select: none;
}

.sidebar-section-label {
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-subtle);
  padding: 0 10px 10px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
}

.sidebar-nav-item:hover {
  background: var(--color-bg-input);
  color: var(--color-text-main);
}

.sidebar-nav-item.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-color: rgba(30, 64, 175, 0.2);
}

[data-theme="dark"] .sidebar-nav-item.active {
  background: rgba(59, 130, 246, 0.2) !important;
  color: #93C5FD !important;
  border-color: rgba(96, 165, 250, 0.35) !important;
}

.sidebar-item-icon {
  font-size: 1rem;
}

.sidebar-item-label {
  flex: 1;
}

.sidebar-item-badge {
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  padding: 2px 7px;
  border-radius: var(--radius-full);
  color: var(--color-text-subtle);
}

.sidebar-footer {
  border-top: 1px solid var(--color-border);
  padding-top: 14px;
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sidebar-version-badge {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-subtle);
  padding: 0 8px;
}

.sidebar-action-btn {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 6px 10px;
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-fast);
}

.sidebar-action-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-bg-input);
}

/* Desktop Main Stage */
body.is-desktop-app .main-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px 32px 48px;
  background: var(--color-bg-body);
}

body.is-desktop-app .tools-container {
  max-width: 100%;
}

/* Stage Header Bar */
.stage-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 16px;
}

.stage-title-wrap {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.stage-category-title {
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text-main);
}

.stage-count-pill {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 3px 9px;
  border-radius: var(--radius-full);
}

[data-theme="dark"] .stage-count-pill {
  color: #93C5FD;
  background: rgba(59, 130, 246, 0.22);
}

/* Stage Quick Drop */
.stage-quick-drop {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-bg-card);
  border: 1px dashed var(--color-border-hover);
  border-radius: var(--radius-md);
  padding: 8px 16px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.stage-quick-drop:hover, .stage-quick-drop.dragover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* Enhanced Native Tool Cards in Desktop App Mode */
body.is-desktop-app .tools-grid {
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 16px;
}

body.is-desktop-app .tool-card {
  padding: 20px;
  border-radius: var(--radius-md);
}

body.is-desktop-app .tool-card-icon-wrap {
  width: 44px;
  height: 44px;
  margin-bottom: 14px;
}

body.is-desktop-app .tool-card-title {
  font-size: 1.08rem;
}

body.is-desktop-app .tool-card-desc {
  font-size: 0.84rem;
  line-height: 1.45;
}