/**
 * PDFScannerX — Stylesheet
 * Modern aesthetic, glassmorphism, responsive workspace, paper simulation, and print styles.
 */

:root {
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-elevated: rgba(30, 41, 59, 0.85);

  --border-subtle: #334155;
  --border-focus: #38bdf8;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --accent: #0284c7;
  --accent-hover: #0369a1;
  --accent-glow: rgba(2, 132, 199, 0.35);

  --accent-cyan: #06b6d4;
  --success: #16a34a;
  --danger: #ef4444;
  --warning: #f59e0b;

  --header-height: 60px;
  --sidebar-left-w: 200px;
  --sidebar-right-w: 320px;

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

  --shadow-paper: 0 25px 50px -12px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.08);
  --shadow-floating: 0 12px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.1);
  --shadow-modal: 0 25px 60px -15px rgba(0, 0, 0, 0.85), 0 0 0 1px rgba(255, 255, 255, 0.12);
}

/* Light Mode Theme */
[data-theme="light"], body.app-theme-light {
  --bg-primary: #eef2f6;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f8fafc;
  --bg-elevated: rgba(255, 255, 255, 0.96);

  --border-subtle: #cbd5e1;
  --border-focus: #0284c7;

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;

  --accent: #0284c7;
  --accent-hover: #0369a1;
  --accent-glow: rgba(2, 132, 199, 0.2);

  --accent-cyan: #0891b2;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;

  --shadow-paper: 0 16px 45px rgba(0, 0, 0, 0.16), 0 0 0 1px rgba(0, 0, 0, 0.08);
  --shadow-floating: 0 8px 24px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(0, 0, 0, 0.08);
  --shadow-modal: 0 25px 65px rgba(0, 0, 0, 0.22), 0 0 0 1px rgba(0, 0, 0, 0.1);
}

/* Light Mode Overrides */
[data-theme="light"] .brand-title {
  background: linear-gradient(to right, #0f172a, #334155);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
[data-theme="light"] .section-title,
[data-theme="light"] .modal-heading,
[data-theme="light"] .chip-name,
[data-theme="light"] .paper-pill strong {
  color: var(--text-main);
}
[data-theme="light"] .paper-pill {
  background-color: #ffffff;
  border-color: #cbd5e1;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}
[data-theme="light"] .btn-secondary {
  background-color: #ffffff;
  border-color: #cbd5e1;
  color: #1e293b;
}
[data-theme="light"] .btn-secondary:hover {
  background-color: #f1f5f9;
  border-color: #94a3b8;
}
[data-theme="light"] .btn-ghost:hover {
  background: rgba(0, 0, 0, 0.06);
  color: #0f172a;
}
[data-theme="light"] .floating-toolbar {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.05);
}
[data-theme="light"] .tool-btn {
  color: #475569;
}
[data-theme="light"] .tool-btn:hover {
  background-color: #f1f5f9;
  color: #0f172a;
}
[data-theme="light"] .tool-btn.active {
  background-color: #e0f2fe;
  color: #0284c7;
}
[data-theme="light"] .toolbar-sep {
  background-color: #e2e8f0;
}
[data-theme="light"] .dropdown-menu {
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid #cbd5e1;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.05);
}
[data-theme="light"] .dropdown-item {
  color: #1e293b !important;
}
[data-theme="light"] .dropdown-item:hover {
  background-color: #f1f5f9 !important;
  color: #0284c7 !important;
}
[data-theme="light"] .dropdown-item.active {
  background-color: #e0f2fe !important;
  color: #0284c7 !important;
  font-weight: 600 !important;
}
[data-theme="light"] .dropdown-divider {
  background-color: #e2e8f0 !important;
}
[data-theme="light"] .form-select,
[data-theme="light"] .form-input {
  background-color: #ffffff;
  border-color: #cbd5e1;
  color: #0f172a;
}
[data-theme="light"] .form-select:focus,
[data-theme="light"] .form-input:focus {
  border-color: #0284c7;
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}
[data-theme="light"] .metrics-card {
  background: #f8fafc;
  border-color: #e2e8f0;
}
[data-theme="light"] .metric-val {
  color: #0f172a;
}
[data-theme="light"] .toggle-button-group {
  background: #f1f5f9;
  border-color: #cbd5e1;
}
[data-theme="light"] .toggle-btn {
  color: #64748b;
}
[data-theme="light"] .toggle-btn.active {
  background: #ffffff;
  color: #0284c7;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}
[data-theme="light"] .filter-chip {
  background-color: #ffffff;
  border-color: #e2e8f0;
}
[data-theme="light"] .filter-chip:hover {
  background-color: #f8fafc;
  border-color: #cbd5e1;
}
[data-theme="light"] .filter-chip.active {
  background-color: #f0f9ff;
  border-color: #0284c7;
  box-shadow: 0 0 0 1px #0284c7;
}
[data-theme="light"] .fine-tuning-box {
  background-color: #f8fafc;
  border-color: #e2e8f0;
}
[data-theme="light"] .preview-canvas-card {
  background: #f1f5f9;
  border-color: #cbd5e1;
}
[data-theme="light"] .preview-card-header,
[data-theme="light"] .preview-card-footer {
  background: #ffffff;
  border-color: #e2e8f0;
}
[data-theme="light"] .preview-canvas-viewport {
  background: radial-gradient(circle at center, #cbd5e1 0%, #94a3b8 100%);
}
[data-theme="light"] .floating-header-btn,
[data-theme="light"] .floating-tools-restore-btn {
  background: rgba(255, 255, 255, 0.95);
  border-color: #cbd5e1;
  color: #0f172a;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}
[data-theme="light"] .page-thumbnail-card {
  background: #ffffff;
  border-color: #e2e8f0;
}
[data-theme="light"] .page-thumbnail-card.active {
  border-color: #0284c7;
  background: #f0f9ff;
}
[data-theme="light"] .sheet-stage {
  background-color: #e2e8f0;
  background-image: radial-gradient(#cbd5e1 1.2px, transparent 1.2px);
}
[data-theme="light"] .icon-btn:hover {
  background-color: #e2e8f0;
  color: #0f172a;
}
[data-theme="light"] .zoom-controls {
  background-color: #ffffff;
  border-color: #cbd5e1;
}
[data-theme="light"] .zoom-val {
  color: #0f172a;
}
[data-theme="light"] .custom-checkbox-label {
  color: #334155;
}

/* RTL Styles for Arabic */
[dir="rtl"], [dir="rtl"] body {
  font-family: 'Cairo', 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}
[dir="rtl"] .sidebar-left {
  border-right: none;
  border-left: 1px solid var(--border-subtle);
}
[dir="rtl"] .sidebar-right {
  border-left: none;
  border-right: 1px solid var(--border-subtle);
}
[dir="rtl"] .floating-header-btn {
  right: auto;
  left: 20px;
}
[dir="rtl"] .filter-chip {
  text-align: right;
}
[dir="rtl"] .filter-chip.active::after {
  right: auto;
  left: 8px;
}
[dir="rtl"] .dropdown-menu {
  left: auto;
  right: 0;
  transform-origin: top right;
}
[dir="rtl"] .custom-checkbox-label input[type="checkbox"] {
  margin-left: 8px;
  margin-right: 0;
}

/* Language and Theme buttons */
.lang-btn {
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 0 10px;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: 'Cairo', 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s ease, color 0.25s ease;
}

/* ========================================================
   Header Navigation
   ======================================================== */
.app-header {
  height: var(--header-height);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  position: relative;
  z-index: 50;
  user-select: none;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.22s ease;
}

body.header-hidden {
  --header-height: 0px;
}

body.header-hidden .app-header {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

/* Floating Restore Button when header is hidden */
.floating-header-btn {
  position: fixed;
  top: 10px;
  right: 20px;
  transform: translateY(-60px);
  opacity: 0;
  pointer-events: none;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-full);
  color: #f8fafc;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 0 16px rgba(2, 132, 199, 0.3);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.22s ease, background 0.2s ease, border-color 0.2s ease;
  user-select: none;
}

body.header-hidden .floating-header-btn {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.floating-header-btn:hover {
  background: rgba(30, 41, 59, 0.96);
  border-color: #38bdf8;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.6), 0 0 20px rgba(56, 189, 248, 0.45);
  transform: translateY(2px);
}

.floating-header-btn svg {
  color: #38bdf8;
  transition: transform 0.2s ease;
}

.floating-header-btn:hover svg {
  transform: translateY(2px);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex: 1 1 auto;
  min-width: 0;
}

.header-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: visible;
  flex-shrink: 0;
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 3px 8px rgba(56, 189, 248, 0.45));
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), filter 0.28s ease;
}

.brand:hover .brand-logo-img {
  transform: scale(1.1) rotate(-3deg);
  filter: drop-shadow(0 5px 14px rgba(56, 189, 248, 0.7));
}

.modal-brand-logo {
  width: 30px;
  height: 30px;
  object-fit: contain;
  filter: drop-shadow(0 2px 6px rgba(56, 189, 248, 0.45));
}

/* Mobile Drawer Controls */
.mobile-drawer-btn {
  display: none;
}

.mobile-only-close-btn {
  display: none;
}

.sidebar-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.title-with-icon {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-drawer-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 60;
  transition: opacity 0.25s ease;
}

.sidebar-drawer-backdrop.hidden {
  display: none !important;
}

/* PWA Install Button */
.pwa-install-btn {
  background: linear-gradient(135deg, #0284c7 0%, #06b6d4 100%);
  color: #ffffff !important;
  box-shadow: 0 2px 10px rgba(6, 182, 212, 0.4);
  animation: pwaPulse 2.5s infinite;
}

@keyframes pwaPulse {
  0%, 100% { transform: scale(1); box-shadow: 0 2px 10px rgba(6, 182, 212, 0.4); }
  50% { transform: scale(1.03); box-shadow: 0 4px 16px rgba(6, 182, 212, 0.65); }
}

.pwa-install-btn:hover {
  background: linear-gradient(135deg, #0369a1 0%, #0891b2 100%);
  transform: translateY(-1px);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 800;
  font-size: 16px;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #ffffff, #94a3b8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  font-size: 10px;
  font-weight: 600;
  color: #38bdf8;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.header-divider {
  width: 1px;
  height: 24px;
  background-color: var(--border-subtle);
}

/* Active Paper Pill (Interactive) */
.paper-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-size: 12.5px;
  font-family: inherit;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.paper-pill:hover,
.paper-pill:focus-visible {
  background-color: rgba(30, 41, 59, 0.95);
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.25);
  transform: translateY(-1px);
}

.paper-pill:active {
  transform: scale(0.97);
}

.paper-pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #38bdf8;
  box-shadow: 0 0 8px #38bdf8;
}

.paper-pill-label {
  color: var(--text-dim);
}

.paper-pill strong {
  color: #ffffff;
  font-weight: 600;
}

/* Zoom controls */
.zoom-controls {
  display: flex;
  align-items: center;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 2px 4px;
}

.zoom-val {
  font-size: 12px;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  padding: 0 8px;
  min-width: 48px;
  text-align: center;
  color: var(--text-main);
}

/* Buttons — Comfortable, spacious padding and modern proportions */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-weight: 600;
  font-size: 13.5px;
  line-height: 1.3;
  height: 38px;
  min-height: 38px;
  padding: 0 20px;
  min-width: 90px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
  white-space: nowrap;
  box-sizing: border-box;
  text-decoration: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.btn:active {
  transform: scale(0.98);
}

.btn-sm {
  height: 34px;
  min-height: 34px;
  padding: 0 16px;
  font-size: 13px;
  border-radius: 7px;
  min-width: auto;
}

.btn-xs {
  height: 28px;
  min-height: 28px;
  padding: 0 12px;
  font-size: 12px;
  border-radius: 6px;
  min-width: auto;
}

.btn-lg {
  height: 46px;
  min-height: 46px;
  padding: 0 28px;
  font-size: 15px;
  border-radius: 10px;
  min-width: 130px;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  box-shadow: 0 2px 10px var(--accent-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0369a1 0%, #075985 100%);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background-color: #334155;
  border-color: #475569;
}

.btn-accent {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.35);
}

.btn-accent:hover {
  background: linear-gradient(135deg, #059669 0%, #047857 100%);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
}

.btn-danger-outline {
  background: transparent;
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.35);
}

.btn-danger-outline:hover:not(:disabled) {
  background: rgba(239, 68, 68, 0.12);
  border-color: var(--danger);
}

.btn-danger-outline:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.glow-btn {
  box-shadow: 0 0 15px rgba(2, 132, 199, 0.4);
}

.glow-btn:hover {
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.6);
}

.icon-btn {
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.icon-btn-xs {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  background: transparent;
  border: none;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.icon-btn-xs:hover {
  background: var(--bg-tertiary);
  color: var(--text-main);
}

.icon-btn-danger:hover {
  color: var(--danger);
}

/* ========================================================
   Application Workspace Layout
   ======================================================== */
.app-workspace {
  display: flex;
  height: calc(100vh - var(--header-height));
  width: 100%;
  overflow: hidden;
  position: relative;
  transition: height 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Left Sidebar: Pages */
.sidebar-left {
  width: var(--sidebar-left-w);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  user-select: none;
  overflow-x: hidden;
  transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              min-width 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              max-width 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.25s ease,
              border-color 0.25s ease;
}

.sidebar-left.is-collapsed {
  width: 0 !important;
  min-width: 0 !important;
  max-width: 0 !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
  border-left: none !important;
  border-right: none !important;
  opacity: 0 !important;
  pointer-events: none !important;
  visibility: hidden !important;
  overflow: hidden !important;
}

.sidebar-left.is-collapsed * {
  pointer-events: none !important;
}

.sidebar-header {
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.sidebar-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

.page-action-icons {
  display: flex;
  gap: 4px;
}

.thumbnail-strip {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.thumbnail-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  border-radius: var(--radius-sm);
  padding: 6px;
  transition: all 0.18s;
  border: 2px solid transparent;
}

.thumbnail-item:hover {
  background-color: rgba(255, 255, 255, 0.04);
}

.thumbnail-item.active {
  background-color: rgba(2, 132, 199, 0.12);
  border-color: #38bdf8;
}

.thumbnail-item canvas {
  width: 100%;
  height: auto;
  border-radius: 3px;
  background-color: #ffffff;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
}

.thumb-label {
  margin-top: 5px;
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 600;
}

/* Center Viewport Area */
.viewport-area {
  flex: 1;
  height: 100%;
  background: radial-gradient(circle at center, #131b2e 0%, #090d16 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ========================================================
   Edge Sidebar Toggle Handles ("علامة صغيرة يميناً ويساراً")
   ======================================================== */
.edge-sidebar-handle {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 45;
  width: 22px;
  height: 64px;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: #94a3b8;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  padding: 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.45), 0 0 10px rgba(2, 132, 199, 0.2);
  user-select: none;
  transition: width 0.2s cubic-bezier(0.16, 1, 0.3, 1),
              background 0.2s ease,
              border-color 0.2s ease,
              color 0.2s ease,
              box-shadow 0.2s ease;
}

.handle-grip {
  width: 3px;
  height: 14px;
  border-radius: 2px;
  background-color: var(--text-dim);
  opacity: 0.6;
  transition: background-color 0.2s ease, opacity 0.2s ease;
}

.edge-handle-right {
  right: 0;
  border-right: none;
  border-radius: 8px 0 0 8px;
}

.edge-handle-left {
  left: 0;
  border-left: none;
  border-radius: 0 8px 8px 0;
}

.edge-sidebar-handle:hover {
  width: 28px;
  background: rgba(30, 41, 59, 0.98);
  border-color: #38bdf8;
  color: #38bdf8;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.55), 0 0 16px rgba(56, 189, 248, 0.45);
}

.edge-sidebar-handle:hover .handle-grip {
  background-color: #38bdf8;
  opacity: 1;
}

.edge-sidebar-handle.is-open {
  background: rgba(2, 132, 199, 0.22);
  border-color: #38bdf8;
  color: #38bdf8;
}

.edge-sidebar-handle.is-open .handle-grip {
  background-color: #38bdf8;
}

.handle-icon-chevron {
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  flex-shrink: 0;
}

.edge-sidebar-handle.is-open .handle-icon-chevron {
  transform: rotate(180deg);
}

/* Light Theme Overrides for Edge Handles */
[data-theme="light"] .edge-sidebar-handle {
  background: rgba(255, 255, 255, 0.92);
  border-color: #cbd5e1;
  color: #475569;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08), 0 0 8px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .edge-sidebar-handle:hover {
  background: #ffffff;
  border-color: #0284c7;
  color: #0284c7;
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.2);
}

[data-theme="light"] .edge-sidebar-handle.is-open {
  background: #f0f9ff;
  border-color: #0284c7;
  color: #0284c7;
}

[data-theme="light"] .edge-sidebar-handle:hover .handle-grip,
[data-theme="light"] .edge-sidebar-handle.is-open .handle-grip {
  background-color: #0284c7;
}

/* ========================================================
   Floating Toolbar & Dynamic Placement by Orientation/Language
   - Landscape: Horizontal bar at the TOP
   - Portrait: Vertical bar on the RIGHT (Arabic) or LEFT (English)
   ======================================================== */
.floating-toolbar {
  position: absolute;
  z-index: 30;
  display: flex;
  background-color: var(--bg-elevated);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-floating);
  transition: top 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              bottom 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              left 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              right 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.22s ease;
}

/* Floating Restore Button for Tools Bar */
.floating-tools-restore-btn {
  position: absolute;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-full);
  color: #f8fafc;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.45), 0 0 14px rgba(2, 132, 199, 0.25);
  opacity: 0;
  pointer-events: none;
  user-select: none;
  transition: top 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              bottom 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              left 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              right 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.22s ease,
              background 0.2s ease,
              border-color 0.2s ease;
}

.floating-tools-restore-btn svg {
  color: #38bdf8;
  flex-shrink: 0;
}

.floating-tools-restore-btn:hover {
  background: rgba(30, 41, 59, 0.96);
  border-color: #38bdf8;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5), 0 0 18px rgba(56, 189, 248, 0.4);
}

/* --------------------------------------------------------
   1. LANDSCAPE MODE: Horizontal bar at the TOP
   -------------------------------------------------------- */
.viewport-area[data-paper-orient="landscape"] .floating-toolbar {
  top: 14px;
  bottom: auto;
  left: 50%;
  right: auto;
  transform: translateX(-50%);
  flex-direction: row;
  align-items: center;
  padding: 6px 10px;
  gap: 6px;
}

.viewport-area[data-paper-orient="landscape"] .floating-toolbar.toolbar-hidden {
  transform: translateX(-50%) translateY(-80px);
  opacity: 0;
  pointer-events: none;
}

.viewport-area[data-paper-orient="landscape"] .floating-tools-restore-btn {
  top: 14px;
  bottom: auto;
  left: 50%;
  right: auto;
  transform: translateX(-50%) translateY(-60px);
  flex-direction: row;
  padding: 6px 16px;
  gap: 8px;
}

.viewport-area[data-paper-orient="landscape"] .floating-tools-restore-btn.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.viewport-area[data-paper-orient="landscape"] .floating-tools-restore-btn:hover {
  transform: translateX(-50%) translateY(2px);
}

.viewport-area[data-paper-orient="landscape"] .toolbar-sep {
  width: 1px;
  height: 20px;
  background-color: var(--border-subtle);
  margin: 0 3px;
}

.viewport-area[data-paper-orient="landscape"] .tool-tooltip {
  bottom: -28px;
  top: auto;
  left: 50%;
  right: auto;
  transform: translateX(-50%);
}

.viewport-area[data-paper-orient="landscape"] .dropdown-menu {
  top: 100%;
  bottom: auto;
  margin-top: 8px;
}
[dir="rtl"] .viewport-area[data-paper-orient="landscape"] .dropdown-menu {
  right: 0;
  left: auto;
  transform-origin: top right;
}
[dir="ltr"] .viewport-area[data-paper-orient="landscape"] .dropdown-menu {
  left: 0;
  right: auto;
  transform-origin: top left;
}

/* --------------------------------------------------------
   2. PORTRAIT MODE: Vertical bar on the side (Right for AR, Left for EN)
   -------------------------------------------------------- */
.viewport-area[data-paper-orient="portrait"] .floating-toolbar,
.viewport-area:not([data-paper-orient="landscape"]) .floating-toolbar {
  top: max(16px, calc(50% - 250px));
  bottom: auto;
  flex-direction: column;
  align-items: center;
  padding: 8px 5px;
  gap: 2px;
  width: fit-content;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.viewport-area[data-paper-orient="portrait"] .tool-btn,
.viewport-area:not([data-paper-orient="landscape"]) .tool-btn {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}

.viewport-area[data-paper-orient="portrait"] .tool-btn svg,
.viewport-area:not([data-paper-orient="landscape"]) .tool-btn svg {
  width: 15px;
  height: 15px;
}

.viewport-area[data-paper-orient="portrait"] .toolbar-sep,
.viewport-area:not([data-paper-orient="landscape"]) .toolbar-sep {
  width: 18px;
  height: 1px;
  background-color: var(--border-subtle);
  margin: 2px auto;
  flex-shrink: 0;
}

/* Portrait in ARABIC (dir="rtl"): On the RIGHT side */
[dir="rtl"] .viewport-area[data-paper-orient="portrait"] .floating-toolbar,
[dir="rtl"] .viewport-area:not([data-paper-orient="landscape"]) .floating-toolbar {
  right: 32px;
  left: auto;
  transform: translateX(0);
}

[dir="rtl"] .viewport-area[data-paper-orient="portrait"] .floating-toolbar.toolbar-hidden,
[dir="rtl"] .viewport-area:not([data-paper-orient="landscape"]) .floating-toolbar.toolbar-hidden {
  transform: translateX(110px);
  opacity: 0;
  pointer-events: none;
}

[dir="rtl"] .viewport-area[data-paper-orient="portrait"] .floating-tools-restore-btn,
[dir="rtl"] .viewport-area:not([data-paper-orient="landscape"]) .floating-tools-restore-btn {
  top: max(16px, calc(50% - 30px));
  bottom: auto;
  right: 32px;
  left: auto;
  transform: translateX(90px);
  flex-direction: column;
  padding: 10px 8px;
  gap: 6px;
  font-size: 11px;
}

[dir="rtl"] .viewport-area[data-paper-orient="portrait"] .floating-tools-restore-btn.visible,
[dir="rtl"] .viewport-area:not([data-paper-orient="landscape"]) .floating-tools-restore-btn.visible {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

[dir="rtl"] .viewport-area[data-paper-orient="portrait"] .floating-tools-restore-btn:hover,
[dir="rtl"] .viewport-area:not([data-paper-orient="landscape"]) .floating-tools-restore-btn:hover {
  transform: translateX(-2px);
}

[dir="rtl"] .viewport-area[data-paper-orient="portrait"] .tool-tooltip,
[dir="rtl"] .viewport-area:not([data-paper-orient="landscape"]) .tool-tooltip {
  right: calc(100% + 9px);
  left: auto;
  top: 50%;
  bottom: auto;
  transform: translateY(-50%);
}

[dir="rtl"] .viewport-area[data-paper-orient="portrait"] .dropdown-menu,
[dir="rtl"] .viewport-area:not([data-paper-orient="landscape"]) .dropdown-menu {
  top: 50%;
  bottom: auto;
  right: calc(100% + 12px);
  left: auto;
  margin-top: 0;
  transform: translateY(-50%);
  transform-origin: center right;
}

[dir="rtl"] .viewport-area[data-paper-orient="portrait"] .dropdown-wrapper:last-of-type .dropdown-menu,
[dir="rtl"] .viewport-area:not([data-paper-orient="landscape"]) .dropdown-wrapper:last-of-type .dropdown-menu {
  top: 50%;
  bottom: auto;
  transform: translateY(-50%);
  transform-origin: center right;
}

/* Portrait in ENGLISH (dir="ltr"): On the LEFT side */
[dir="ltr"] .viewport-area[data-paper-orient="portrait"] .floating-toolbar,
[dir="ltr"] .viewport-area:not([data-paper-orient="landscape"]) .floating-toolbar {
  left: 32px;
  right: auto;
  transform: translateX(0);
}

[dir="ltr"] .viewport-area[data-paper-orient="portrait"] .floating-toolbar.toolbar-hidden,
[dir="ltr"] .viewport-area:not([data-paper-orient="landscape"]) .floating-toolbar.toolbar-hidden {
  transform: translateX(-110px);
  opacity: 0;
  pointer-events: none;
}

[dir="ltr"] .viewport-area[data-paper-orient="portrait"] .floating-tools-restore-btn,
[dir="ltr"] .viewport-area:not([data-paper-orient="landscape"]) .floating-tools-restore-btn {
  top: max(16px, calc(50% - 30px));
  bottom: auto;
  left: 32px;
  right: auto;
  transform: translateX(-90px);
  flex-direction: column;
  padding: 10px 8px;
  gap: 6px;
  font-size: 11px;
}

[dir="ltr"] .viewport-area[data-paper-orient="portrait"] .floating-tools-restore-btn.visible,
[dir="ltr"] .viewport-area:not([data-paper-orient="landscape"]) .floating-tools-restore-btn.visible {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

[dir="ltr"] .viewport-area[data-paper-orient="portrait"] .floating-tools-restore-btn:hover,
[dir="ltr"] .viewport-area:not([data-paper-orient="landscape"]) .floating-tools-restore-btn:hover {
  transform: translateX(2px);
}

[dir="ltr"] .viewport-area[data-paper-orient="portrait"] .tool-tooltip,
[dir="ltr"] .viewport-area:not([data-paper-orient="landscape"]) .tool-tooltip {
  left: calc(100% + 9px);
  right: auto;
  top: 50%;
  bottom: auto;
  transform: translateY(-50%);
}

[dir="ltr"] .viewport-area[data-paper-orient="portrait"] .dropdown-menu,
[dir="ltr"] .viewport-area:not([data-paper-orient="landscape"]) .dropdown-menu {
  top: 50%;
  bottom: auto;
  left: calc(100% + 12px);
  right: auto;
  margin-top: 0;
  transform: translateY(-50%);
  transform-origin: center left;
}

[dir="ltr"] .viewport-area[data-paper-orient="portrait"] .dropdown-wrapper:last-of-type .dropdown-menu,
[dir="ltr"] .viewport-area:not([data-paper-orient="landscape"]) .dropdown-wrapper:last-of-type .dropdown-menu {
  top: 50%;
  bottom: auto;
  transform: translateY(-50%);
  transform-origin: center left;
}

/* Compact scaling for smaller screen heights */
@media (max-height: 580px) {
  .viewport-area[data-paper-orient="portrait"] .floating-toolbar,
  .viewport-area:not([data-paper-orient="landscape"]) .floating-toolbar {
    top: 8px;
    padding: 5px 3px;
    gap: 1px;
  }
  .viewport-area[data-paper-orient="portrait"] .tool-btn,
  .viewport-area:not([data-paper-orient="landscape"]) .tool-btn {
    width: 25px;
    height: 25px;
  }
  .viewport-area[data-paper-orient="portrait"] .tool-btn svg,
  .viewport-area:not([data-paper-orient="landscape"]) .tool-btn svg {
    width: 13px;
    height: 13px;
  }
  .viewport-area[data-paper-orient="portrait"] .toolbar-sep,
  .viewport-area:not([data-paper-orient="landscape"]) .toolbar-sep {
    width: 14px;
    margin: 1px auto;
  }
}

.btn-close-toolbar {
  color: var(--text-muted);
  transition: all 0.15s ease;
}

.btn-close-toolbar:hover,
.tool-btn-danger:hover {
  background: rgba(239, 68, 68, 0.18) !important;
  color: #f87171 !important;
}

.tool-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: transparent;
  border: none;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: all 0.15s ease;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.tool-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.tool-btn.active {
  background: #0284c7;
  color: #ffffff;
  box-shadow: 0 0 12px var(--accent-glow);
}

.toolbar-sep {
  width: 1px;
  height: 20px;
  background-color: var(--border-subtle);
  margin: 0 3px;
}

.tool-tooltip {
  position: absolute;
  bottom: -28px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #0f172a;
  border: 1px solid var(--border-subtle);
  color: #ffffff;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 7px;
  border-radius: 4px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  white-space: nowrap;
}

.tool-btn:hover .tool-tooltip {
  opacity: 1;
}

.dropdown-wrapper.is-open .tool-tooltip {
  display: none !important;
  opacity: 0 !important;
}

/* Dropdown Wrapper for Shapes */
.dropdown-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 8px;
  background-color: var(--bg-elevated);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 6px;
  min-width: 180px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.08);
  display: none;
  flex-direction: column;
  gap: 3px;
  z-index: 1000;
  pointer-events: auto;
  user-select: none;
}

.dropdown-wrapper.is-open .dropdown-menu,
.dropdown-wrapper:hover .dropdown-menu,
.dropdown-wrapper:focus-within .dropdown-menu {
  display: flex;
}

.dropdown-item {
  display: flex !important;
  align-items: center !important;
  justify-content: flex-start !important;
  text-align: start !important;
  gap: 10px !important;
  width: 100% !important;
  min-width: 0 !important;
  height: 36px !important;
  min-height: 36px !important;
  padding: 0 12px !important;
  border-radius: 8px !important;
  background: transparent !important;
  border: none !important;
  color: var(--text-main) !important;
  font-size: 13px !important;
  font-weight: 500 !important;
  white-space: nowrap !important;
  cursor: pointer !important;
  box-sizing: border-box !important;
  transition: background 0.15s ease, color 0.15s ease, transform 0.12s ease !important;
}

.dropdown-item svg {
  width: 16px !important;
  height: 16px !important;
  min-width: 16px !important;
  min-height: 16px !important;
  flex-shrink: 0 !important;
  stroke-width: 2 !important;
  color: inherit !important;
  stroke: currentColor !important;
}

.dropdown-item span {
  white-space: nowrap !important;
  flex: 1 !important;
  text-align: start !important;
}

.dropdown-item:hover {
  background: rgba(2, 132, 199, 0.16) !important;
  color: #38bdf8 !important;
}

.dropdown-item.active {
  background: rgba(2, 132, 199, 0.25) !important;
  color: #38bdf8 !important;
  font-weight: 600 !important;
}

[dir="rtl"] .dropdown-item:hover {
  transform: translateX(-2px) !important;
}

[dir="ltr"] .dropdown-item:hover {
  transform: translateX(2px) !important;
}

.dropdown-divider {
  height: 1px !important;
  background-color: var(--border-subtle) !important;
  margin: 5px 6px !important;
  border: none !important;
  opacity: 0.6 !important;
}

.stamp-chip-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.stamp-chip-dot.green { background-color: #16a34a; }
.stamp-chip-dot.red { background-color: #dc2626; }
.stamp-chip-dot.blue { background-color: #2563eb; }
.stamp-chip-dot.gray { background-color: #64748b; }
.stamp-chip-dot.amber { background-color: #d97706; }

/* Sheet Stage (Paper simulation) */
.sheet-stage {
  flex: 1;
  width: 100%;
  height: 100%;
  overflow: auto;
  display: flex;
  padding: 60px 40px;
  box-sizing: border-box;
}

.paper-sheet {
  position: relative;
  background-color: #ffffff;
  box-shadow: var(--shadow-paper);
  border-radius: 2px;
  overflow: hidden;
  user-select: none;
  margin: auto;
  flex-shrink: 0;
  box-sizing: border-box;
  direction: ltr !important;
}

.paper-sheet canvas {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  direction: ltr !important;
}

#bg-canvas {
  z-index: 1;
  direction: ltr !important;
  touch-action: none;
  -webkit-touch-callout: none;
  user-select: none;
}

#anno-canvas {
  z-index: 2;
  cursor: default;
  direction: ltr !important;
  touch-action: none;
  -webkit-touch-callout: none;
  user-select: none;
}

.guides-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 3;
}

.printable-margin-indicator {
  display: none !important;
}

.margin-guide-badge {
  display: none !important;
}

/* Right Sidebar: Settings & Inspector */
.sidebar-right {
  width: var(--sidebar-right-w);
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  flex-shrink: 0;
  user-select: none;
  transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              min-width 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              max-width 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.25s ease,
              border-color 0.25s ease;
}

.sidebar-right.is-collapsed {
  width: 0 !important;
  min-width: 0 !important;
  max-width: 0 !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
  border-left: none !important;
  border-right: none !important;
  opacity: 0 !important;
  pointer-events: none !important;
  visibility: hidden !important;
  overflow: hidden !important;
}

.sidebar-right.is-collapsed * {
  pointer-events: none !important;
}

.panel-section {
  padding: 16px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
}

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

.form-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
}

.form-label-xs {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-dim);
}

.form-select, .form-input {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  height: 34px;
  padding: 0 10px;
  font-size: 13px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}

.form-select:focus, .form-input:focus {
  border-color: var(--border-focus);
}

.toggle-button-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.toggle-btn {
  height: 34px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.15s;
}

.toggle-btn:hover {
  background-color: #334155;
  color: #ffffff;
}

.toggle-btn.active {
  background-color: #0284c7;
  border-color: #38bdf8;
  color: #ffffff;
}

.custom-dims-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background-color: rgba(0, 0, 0, 0.2);
  padding: 10px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border-subtle);
}

.dims-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.metrics-card {
  background-color: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11.5px;
}

.metric-key {
  color: var(--text-dim);
}

.metric-val {
  font-family: 'JetBrains Mono', monospace;
  color: #38bdf8;
  font-weight: 600;
}

.preview-toggle-btn.active {
  background-color: #0284c7;
  color: #ffffff;
  border-color: #38bdf8;
}

.color-picker-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-input {
  width: 38px;
  height: 34px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.slider-input {
  flex: 1;
  accent-color: #0284c7;
}

/* Inline text editor */
.canvas-inline-editor-wrap {
  position: absolute;
  z-index: 100;
  pointer-events: auto;
  direction: ltr !important;
  box-sizing: border-box;
}

.canvas-inline-editor {
  background: rgba(255, 255, 255, 0.95);
  color: #0f172a;
  border: 1.5px dashed #2563eb;
  border-radius: 4px;
  padding: 4px 8px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2), 0 0 0 2px rgba(37, 99, 235, 0.2);
  outline: none;
  resize: both;
  min-width: 80px;
  max-width: 90vw;
  font-family: inherit;
  line-height: 1.35;
  box-sizing: border-box;
  display: block;
  overflow: hidden;
  direction: auto;
}

.canvas-inline-editor::placeholder {
  color: #94a3b8;
  font-style: italic;
  opacity: 0.9;
}

.rotation-control-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.rotation-val-badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 32px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* ========================================================
   Modals (Scanner & Signature)
   ======================================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-backdrop.hidden {
  display: none !important;
}

.modal-window {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  display: flex;
  flex-direction: column;
  max-height: 94vh;
  overflow: hidden;
  animation: modalEnter 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalEnter {
  from { opacity: 0; transform: scale(0.96) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.scanner-modal-window {
  width: 960px;
  max-width: 98vw;
}

.signature-modal-window {
  width: 600px;
}

.modal-header {
  height: 60px;
  padding: 0 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title-box {
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-title-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: rgba(2, 132, 199, 0.2);
  color: #38bdf8;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-heading {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
}

.modal-subheading {
  font-size: 11.5px;
  color: var(--text-dim);
}

.icon-btn-close {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
  padding: 4px;
  border-radius: 4px;
}

.icon-btn-close:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.1);
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  background-color: var(--bg-tertiary);
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
}

.modal-footer .btn {
  height: 40px;
  min-height: 40px;
  padding: 0 24px;
  min-width: 110px;
  font-size: 13.5px;
  font-weight: 600;
  border-radius: 8px;
}

/* Scanner Step 1: Capture */
.video-preview-wrapper {
  position: relative;
  width: 100%;
  height: 440px;
  background-color: #000000;
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

#scanner-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-crosshairs-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.guide-frame {
  width: 72%;
  height: 75%;
  border: 2px dashed rgba(56, 189, 248, 0.75);
  border-radius: 8px;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.35);
}

.guide-tip {
  margin-top: 12px;
  font-size: 12px;
  background: rgba(0, 0, 0, 0.65);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  color: #ffffff;
}

.scanner-source-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 18px;
}

/* Scanner Step 2: Crop */
.crop-instruction-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(2, 132, 199, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 12.5px;
  color: #38bdf8;
  margin-bottom: 12px;
}

.crop-canvas-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #090d16;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 10px;
  min-height: 400px;
}

#scanner-crop-canvas {
  cursor: crosshair;
  max-width: 100%;
  max-height: 520px;
  border-radius: 4px;
}

.step-footer-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
}

/* Scanner Step 3: Filter & Destination */
.filter-layout-split {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 20px;
}

.preview-canvas-col {
  background-color: #090d16;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  min-height: 440px;
}

#scanner-preview-canvas {
  max-width: 100%;
  max-height: 480px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.filter-controls-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.filter-group-title {
  font-size: 13px;
  font-weight: 700;
  color: #ffffff;
}

.filter-chips-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.studio-chips-grid {
  max-height: 230px;
  overflow-y: auto;
  padding-right: 4px;
}

.filter-chip {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}

.filter-chip:hover {
  background-color: #334155;
  border-color: #475569;
}

.filter-chip.active {
  background-color: rgba(2, 132, 199, 0.18);
  border-color: #38bdf8;
  box-shadow: 0 0 12px var(--accent-glow);
}

.filter-chip.active::after {
  content: "";
  position: absolute;
  top: 8px;
  right: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #38bdf8;
  box-shadow: 0 0 6px #38bdf8;
}

.chip-name {
  font-size: 12.5px;
  font-weight: 700;
  color: #f8fafc;
  line-height: 1.3;
}

.chip-desc {
  font-size: 10px;
  color: #94a3b8;
  margin-top: 3px;
  line-height: 1.3;
}

.filter-studio-window {
  width: 920px;
  max-width: 95vw;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
}

.filter-studio-body {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 20px;
  padding: 18px 22px;
  overflow-y: auto;
  max-height: calc(92vh - 130px);
}

@media (max-width: 820px) {
  .filter-studio-body {
    grid-template-columns: 1fr;
  }
}

.filter-studio-preview-col {
  display: flex;
  flex-direction: column;
}

.preview-canvas-card {
  background: #090d16;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 440px;
}

.preview-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 14px;
  background: rgba(15, 23, 42, 0.75);
  border-bottom: 1px solid var(--border-subtle);
}

.preview-page-badge {
  font-size: 11.5px;
  font-weight: 600;
  color: #cbd5e1;
}

.compare-btn {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: #1e293b;
  border: 1px solid #475569;
  color: #f1f5f9;
  cursor: pointer;
  user-select: none;
  transition: all 0.15s ease;
}

.compare-btn:hover {
  background: #334155;
  border-color: #64748b;
}

.compare-btn:active {
  background: #0284c7;
  border-color: #38bdf8;
  color: #ffffff;
}

.preview-canvas-viewport {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: radial-gradient(circle at center, #1e293b 0%, #0b1120 100%);
  overflow: hidden;
}

#filter-studio-preview-canvas {
  max-width: 100%;
  max-height: 380px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
  border-radius: 4px;
  background: #ffffff;
  object-fit: contain;
  transition: filter 0.1s ease;
}

.preview-card-footer {
  display: flex;
  justify-content: space-between;
  padding: 8px 14px;
  font-size: 11px;
  color: var(--text-dim);
  background: rgba(15, 23, 42, 0.75);
  border-top: 1px solid var(--border-subtle);
}

.studio-section-title {
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #94a3b8;
  margin-bottom: 8px;
}

.fine-tuning-box {
  background-color: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.slider-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.slider-label-group {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11.5px;
  color: var(--text-muted);
}

.slider-row input[type="range"] {
  accent-color: #0284c7;
  width: 100%;
  cursor: pointer;
}

.tuning-actions-row {
  display: flex;
  justify-content: flex-end;
  margin-top: 4px;
}

.batch-apply-option {
  padding: 6px 2px;
}

.custom-checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: #cbd5e1;
  cursor: pointer;
  user-select: none;
}

.custom-checkbox-label input[type="checkbox"] {
  accent-color: #0284c7;
  width: 15px;
  height: 15px;
  cursor: pointer;
}

.badge-accent-pill {
  display: inline-block;
  padding: 2px 8px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 999px;
  margin-bottom: 6px;
}

.destination-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 6px;
}

/* Signature Pad Window */
.signature-pad-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

#signature-pad {
  background-color: #ffffff;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-subtle);
  cursor: crosshair;
  touch-action: none;
}

.sign-baseline {
  width: 80%;
  height: 1px;
  background-color: #cbd5e1;
  margin-top: -30px;
  pointer-events: none;
}

.sign-options-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding-top: 14px;
}

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

.sign-color-pill {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s;
}

.sign-color-pill.active {
  transform: scale(1.2);
  border-color: #38bdf8;
}

.sign-color-pill.black { background-color: #0f172a; }
.sign-color-pill.blue { background-color: #1d4ed8; }
.sign-color-pill.red { background-color: #b91c1c; }

/* Signature Modal Tabs & Upload Feature */
.signature-tabs-bar {
  display: flex;
  background-color: var(--bg-tertiary);
  padding: 4px;
  border-radius: var(--radius-md);
  margin: 14px 20px 0 20px;
  gap: 6px;
  border: 1px solid var(--border-subtle);
}

.sign-tab-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 36px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.18s ease;
}

.sign-tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.sign-tab-btn.active {
  background: var(--bg-secondary);
  color: #38bdf8;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
  border-color: rgba(56, 189, 248, 0.25);
}

.signature-upload-container {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px;
}

.sign-upload-box {
  width: 100%;
  min-height: 200px;
  border: 2px dashed var(--border-subtle);
  border-radius: var(--radius-md);
  background-color: rgba(15, 23, 42, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
  padding: 20px;
}

.sign-upload-box:hover,
.sign-upload-box.drag-over {
  border-color: #38bdf8;
  background-color: rgba(56, 189, 248, 0.06);
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.15);
}

.sign-upload-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
  color: var(--text-muted);
}

.upload-icon-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.1);
  color: #38bdf8;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
  transition: transform 0.2s ease;
}

.sign-upload-box:hover .upload-icon-circle {
  transform: scale(1.08);
}

.upload-title {
  font-size: 14px;
  color: var(--text-main);
  font-weight: 600;
}

.upload-hint {
  font-size: 11.5px;
  color: var(--text-dim);
}

.sign-upload-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: 100%;
}

.preview-img-frame {
  max-width: 480px;
  max-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: 
    linear-gradient(45deg, #1e293b 25%, transparent 25%), 
    linear-gradient(-45deg, #1e293b 25%, transparent 25%), 
    linear-gradient(45deg, transparent 75%, #1e293b 75%), 
    linear-gradient(-45deg, transparent 75%, #1e293b 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
  background-color: #0f172a;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.35);
}

.preview-img-frame img {
  max-width: 100%;
  max-height: 136px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.4));
}

.sign-upload-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
}

/* Light Mode Overrides for Signature Tabs & Upload */
[data-theme="light"] .sign-tab-btn.active {
  background: #ffffff;
  color: #0284c7;
  border-color: #cbd5e1;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .sign-upload-box {
  background-color: #f8fafc;
  border-color: #cbd5e1;
}

[data-theme="light"] .sign-upload-box:hover {
  background-color: #f0f9ff;
  border-color: #0284c7;
}

[data-theme="light"] .upload-icon-circle {
  background: rgba(2, 132, 199, 0.1);
  color: #0284c7;
}

[data-theme="light"] .preview-img-frame {
  background-color: #ffffff;
  background-image: 
    linear-gradient(45deg, #f1f5f9 25%, transparent 25%), 
    linear-gradient(-45deg, #f1f5f9 25%, transparent 25%), 
    linear-gradient(45deg, transparent 75%, #f1f5f9 75%), 
    linear-gradient(-45deg, transparent 75%, #f1f5f9 75%);
  border-color: #cbd5e1;
}

/* ========================================================
   Toast Notifications (Disabled per user request)
   ======================================================== */
#toast-container,
.toast-item {
  display: none !important;
}

.hidden {
  display: none !important;
}

/* Accessible hidden file input that still accepts programmatic .click() on iOS & mobile */
.visually-hidden-file-input {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

/* Header Drawer Toggle Buttons (Pages & Paper Settings) */
.header-drawer-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-drawer-btn.is-active,
.header-drawer-btn:active {
  background: rgba(2, 132, 199, 0.22) !important;
  border-color: #38bdf8 !important;
  color: #38bdf8 !important;
}

.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }

/* ========================================================
   BOTTOM PAGE ACTION DOCK (Like Video Frame 00:12 & 00:18)
   ======================================================== */
.page-action-dock {
  position: absolute;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-floating);
  user-select: none;
}

.dock-btn {
  height: 38px;
  padding: 0 16px;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.18s ease;
}

.dock-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.primary-dock-btn {
  background: linear-gradient(135deg, #0284c7 0%, #38bdf8 100%);
  color: #ffffff !important;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.primary-dock-btn:hover {
  background: linear-gradient(135deg, #0369a1 0%, #0284c7 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.55);
}

.hd-enhance-btn {
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #db2777 100%);
  color: #ffffff !important;
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.hd-enhance-btn:hover {
  background: linear-gradient(135deg, #4338ca 0%, #6d28d9 50%, #be185d 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.7);
}

.danger-dock-btn:hover {
  color: var(--danger);
  background-color: rgba(239, 68, 68, 0.15);
}

/* ========================================================
   FULLSCREEN CORNER ADJUSTER SCREEN (Like Video Frame 00:14)
   ======================================================== */
.corner-modal-backdrop {
  background-color: #000000 !important;
  padding: 0 !important;
}

.corner-adjust-screen {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: #050811;
  position: relative;
  overflow: hidden;
}

.corner-top-bar {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0) 100%);
  z-index: 20;
}

.corner-header-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.corner-title {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.corner-hint {
  font-size: 12px;
  color: #94a3b8;
}

.corner-circle-btn {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.corner-circle-btn:active {
  transform: scale(0.92);
}

.corner-btn-cancel {
  background-color: rgba(255, 255, 255, 0.14);
  color: #ffffff;
}

.corner-btn-cancel:hover {
  background-color: rgba(255, 255, 255, 0.25);
}

/* Exact replica of the golden checkmark button in video frame 00:14 */
.corner-btn-confirm {
  background: linear-gradient(135deg, #eab308 0%, #f59e0b 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(245, 158, 11, 0.55);
}

.corner-btn-confirm:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 24px rgba(245, 158, 11, 0.75);
}

.corner-canvas-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 16px;
}

#corner-adjust-canvas {
  display: block;
  border-radius: 4px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.9);
  user-select: none;
  touch-action: none;
}

.corner-bottom-bar {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0) 100%);
  z-index: 20;
}

/* ========================================================
   PRINT STYLES FOR HIGH PRECISION PAPER PRINTING
   ======================================================== */
#print-container {
  display: none;
}

@media print {
  /* Hide the entire app UI chrome when printing */
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  .app-header,
  .sidebar-left,
  .viewport-area,
  .sidebar-right,
  .modal-backdrop,
  #toast-container {
    display: none !important;
  }

  #print-container {
    display: block !important;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    margin: 0;
    padding: 0;
  }

  .print-page-sheet {
    page-break-after: always;
    break-after: page;
    page-break-inside: avoid;
    margin: 0;
    padding: 0;
  }
}

/* ========================================================
   WEB-APP FRIENDLY RESPONSIVE DESIGN (Tablets & Mobile)
   COMPATIBLE FOR ALL SMALL DEVICES & PWA STANDALONE
   ======================================================== */

/* Tablet & Off-canvas Drawers (<= 992px) */
@media (max-width: 992px) {
  .mobile-drawer-btn {
    display: flex !important;
  }

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

  /* Off-canvas Drawers for Left (Pages) and Right (Paper Settings) */
  .sidebar-left,
  .sidebar-right {
    position: fixed;
    top: var(--header-height);
    top: calc(var(--header-height) + env(safe-area-inset-top, 0px));
    bottom: 0;
    height: calc(100vh - var(--header-height));
    height: calc(100dvh - var(--header-height) - env(safe-area-inset-top, 0px));
    z-index: 70;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.7);
    transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.22s ease;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    pointer-events: none;
    visibility: hidden;
  }

  [dir="rtl"] .sidebar-left {
    right: 0;
    left: auto;
    transform: translateX(105%);
    border-left: 1px solid var(--border-subtle);
    border-right: none;
    width: min(290px, 86vw);
  }

  [dir="rtl"] .sidebar-left.drawer-open {
    transform: translateX(0);
  }

  [dir="rtl"] .sidebar-right {
    left: 0;
    right: auto;
    transform: translateX(-105%);
    border-right: 1px solid var(--border-subtle);
    border-left: none;
    width: min(340px, 92vw);
  }

  [dir="rtl"] .sidebar-right.drawer-open {
    transform: translateX(0);
  }

  [dir="ltr"] .sidebar-left {
    left: 0;
    right: auto;
    transform: translateX(-105%);
    border-right: 1px solid var(--border-subtle);
    border-left: none;
    width: min(290px, 86vw);
  }

  [dir="ltr"] .sidebar-left.drawer-open {
    transform: translateX(0);
  }

  [dir="ltr"] .sidebar-right {
    right: 0;
    left: auto;
    transform: translateX(105%);
    border-left: 1px solid var(--border-subtle);
    border-right: none;
    width: min(340px, 92vw);
  }

  [dir="ltr"] .sidebar-right.drawer-open {
    transform: translateX(0);
  }

  .sidebar-left.drawer-open,
  .sidebar-right.drawer-open {
    opacity: 1 !important;
    pointer-events: auto !important;
    visibility: visible !important;
    max-width: 92vw !important;
  }
  .sidebar-left.drawer-open *,
  .sidebar-right.drawer-open * {
    pointer-events: auto !important;
  }

  .app-workspace {
    width: 100vw;
  }

  .viewport-area {
    width: 100%;
  }
}

@media (max-width: 1100px) {
  .app-header {
    padding: 0 12px;
    gap: 8px;
  }
  .header-center {
    gap: 8px;
  }
  .header-left, .header-right {
    gap: 8px;
  }
  .paper-pill-label {
    display: none;
  }
}

@media (max-width: 900px) {
  .zoom-val {
    padding: 0 4px;
    font-size: 11px;
  }
  .header-center {
    gap: 6px;
  }
}

/* ========================================================
   Mobile & Small Devices (<= 768px)
   ======================================================== */
@media (max-width: 768px) {
  :root {
    --header-height: 48px;
  }

  /* 1. Header: Balanced, Clean & Single-Row */
  .app-header {
    height: var(--header-height);
    height: calc(var(--header-height) + env(safe-area-inset-top, 0px));
    padding: env(safe-area-inset-top, 0px) 10px 0 10px;
    gap: 6px;
    overflow: visible;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
  }

  .header-divider {
    display: none;
  }

  .header-left, .header-right, .header-center {
    gap: 5px;
    display: flex;
    align-items: center;
  }

  .header-left {
    flex: 0 0 auto;
  }

  .header-center {
    flex: 1 1 auto;
    justify-content: center;
  }

  .header-right {
    flex: 0 0 auto;
    justify-content: flex-end;
  }

  .brand {
    gap: 6px;
  }

  .brand-title {
    font-size: 13px;
    font-weight: 700;
  }

  .brand-icon {
    width: 28px;
    height: 28px;
  }

  /* Native touch screens use pinch-to-zoom; hide desktop zoom buttons */
  .header-center .zoom-controls {
    display: none;
  }

  /* Interactive Paper Pill */
  .paper-pill {
    padding: 4px 10px;
    font-size: 11.5px;
    gap: 5px;
    border-radius: var(--radius-full);
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  }

  .paper-pill:hover,
  .paper-pill:focus-visible {
    background-color: rgba(30, 41, 59, 0.9);
    border-color: rgba(56, 189, 248, 0.4);
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.35);
  }

  .paper-pill:active {
    transform: scale(0.96);
  }

  .paper-pill-label {
    display: none;
  }

  #btn-print-doc span,
  #btn-export-pdf span,
  #btn-install-pwa span {
    display: none;
  }

  #btn-open-file,
  #btn-open-scanner,
  #btn-print-doc,
  #btn-export-pdf,
  #btn-install-pwa {
    padding: 0 9px;
    height: 36px;
    min-width: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }

  #btn-toggle-lang {
    padding: 0 8px;
    height: 34px;
    min-width: 34px;
    touch-action: manipulation;
  }

  #btn-toggle-lang span {
    font-size: 11px;
  }

  #btn-toggle-theme,
  #btn-toggle-header {
    width: 34px;
    height: 34px;
    min-width: 34px;
    touch-action: manipulation;
  }

  /* 2. Floating Toolbar: Mobile Bottom Action Dock */
  .viewport-area .floating-toolbar,
  [dir="rtl"] .viewport-area[data-paper-orient="portrait"] .floating-toolbar,
  [dir="ltr"] .viewport-area[data-paper-orient="portrait"] .floating-toolbar,
  .viewport-area[data-paper-orient="portrait"] .floating-toolbar,
  .viewport-area:not([data-paper-orient="landscape"]) .floating-toolbar {
    position: absolute !important;
    top: auto !important;
    bottom: max(12px, calc(10px + env(safe-area-inset-bottom, 0px))) !important;
    left: max(8px, env(safe-area-inset-left, 0px)) !important;
    right: max(8px, env(safe-area-inset-right, 0px)) !important;
    margin: 0 auto !important;
    transform: none !important;
    flex-direction: row !important;
    align-items: center !important;
    max-width: calc(100vw - 16px) !important;
    width: fit-content !important;
    padding: 5px 8px !important;
    gap: 3px !important;
    overflow-x: auto !important;
    overflow-y: visible !important;
    border-radius: var(--radius-full) !important;
    background-color: var(--bg-elevated) !important;
    backdrop-filter: blur(18px) !important;
    -webkit-backdrop-filter: blur(18px) !important;
    border: 1px solid var(--border-subtle) !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.12) !important;
    z-index: 55 !important;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch !important;
    touch-action: pan-x !important;
  }

  .viewport-area .floating-toolbar::-webkit-scrollbar {
    display: none;
  }

  .viewport-area .floating-toolbar .tool-btn,
  .viewport-area[data-paper-orient="portrait"] .tool-btn,
  .viewport-area:not([data-paper-orient="landscape"]) .tool-btn {
    width: 36px !important;
    height: 36px !important;
    min-width: 36px !important;
    min-height: 36px !important;
    flex-shrink: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    touch-action: manipulation !important;
  }

  .viewport-area .floating-toolbar .tool-btn svg,
  .viewport-area[data-paper-orient="portrait"] .tool-btn svg,
  .viewport-area:not([data-paper-orient="landscape"]) .tool-btn svg {
    width: 17px !important;
    height: 17px !important;
    flex-shrink: 0 !important;
  }

  .viewport-area .floating-toolbar .toolbar-sep,
  .viewport-area[data-paper-orient="portrait"] .toolbar-sep,
  .viewport-area:not([data-paper-orient="landscape"]) .toolbar-sep {
    width: 1px !important;
    height: 22px !important;
    margin: 0 3px !important;
    flex-shrink: 0 !important;
  }

  /* When hidden, slide down smoothly */
  .viewport-area .floating-toolbar.toolbar-hidden,
  [dir="rtl"] .viewport-area .floating-toolbar.toolbar-hidden,
  [dir="ltr"] .viewport-area .floating-toolbar.toolbar-hidden {
    transform: translateY(90px) !important;
    opacity: 0 !important;
    pointer-events: none !important;
  }

  /* Restore tools button on mobile */
  .viewport-area .floating-tools-restore-btn,
  [dir="rtl"] .viewport-area .floating-tools-restore-btn,
  [dir="ltr"] .viewport-area .floating-tools-restore-btn,
  [dir="rtl"] .viewport-area[data-paper-orient="portrait"] .floating-tools-restore-btn,
  [dir="ltr"] .viewport-area[data-paper-orient="portrait"] .floating-tools-restore-btn {
    top: auto !important;
    bottom: max(12px, calc(10px + env(safe-area-inset-bottom, 0px))) !important;
    left: 50% !important;
    right: auto !important;
    transform: translateX(-50%) translateY(70px) !important;
    flex-direction: row !important;
    padding: 7px 18px !important;
    gap: 8px !important;
    font-size: 13px !important;
    z-index: 55 !important;
  }

  .viewport-area .floating-tools-restore-btn.visible,
  [dir="rtl"] .viewport-area .floating-tools-restore-btn.visible,
  [dir="ltr"] .viewport-area .floating-tools-restore-btn.visible {
    transform: translateX(-50%) translateY(0) !important;
    opacity: 1 !important;
    pointer-events: auto !important;
  }

  /* Shapes dropdown menu on mobile: Fixed above the dock so it is never clipped */
  .viewport-area .floating-toolbar .dropdown-menu,
  [dir="rtl"] .viewport-area .floating-toolbar .dropdown-menu,
  [dir="ltr"] .viewport-area .floating-toolbar .dropdown-menu {
    position: fixed !important;
    top: auto !important;
    bottom: calc(max(12px, env(safe-area-inset-bottom, 0px)) + 52px) !important;
    left: 50% !important;
    right: auto !important;
    transform: translateX(-50%) !important;
    transform-origin: bottom center !important;
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.12) !important;
    min-width: 170px !important;
    z-index: 100 !important;
  }

  .tool-tooltip {
    display: none !important;
  }

  /* 3. Edge Sidebar Handles: Touch-friendly Thumb Tabs */
  .edge-sidebar-handle {
    width: 22px !important;
    height: 58px !important;
    touch-action: manipulation !important;
  }

  .edge-sidebar-handle::before {
    content: '';
    position: absolute;
    inset: -8px;
    z-index: 1;
  }

  /* 4. Modals & Dialogs on Mobile */
  .modal-backdrop {
    padding: 8px !important;
  }

  .modal-window {
    max-width: min(96vw, 680px) !important;
    max-height: calc(94dvh - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px)) !important;
    border-radius: var(--radius-md) !important;
  }

  .signature-modal-window {
    width: 100% !important;
    max-width: min(600px, 96vw) !important;
  }

  #signature-pad {
    max-width: 100% !important;
    height: auto !important;
  }

  .filter-studio-window,
  .scanner-modal-window {
    width: 100% !important;
    max-width: min(96vw, 840px) !important;
    max-height: calc(94dvh - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px)) !important;
  }

  .filter-studio-body {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
    padding: 12px 14px !important;
    max-height: calc(94dvh - 120px) !important;
  }

  .preview-canvas-card {
    min-height: 220px !important;
  }

  #filter-studio-preview-canvas {
    max-height: 200px !important;
  }

  .sheet-stage {
    padding: 14px 6px !important;
  }
}

/* ========================================================
   Small Mobile Phones (<= 520px)
   ======================================================== */
@media (max-width: 520px) {
  #btn-open-file span,
  #btn-open-scanner span {
    display: none;
  }

  #btn-open-file,
  #btn-open-scanner {
    padding: 0 8px;
  }

  .paper-pill {
    padding: 3px 8px;
  }
}

/* ========================================================
   Extra Small Devices (<= 400px - e.g. iPhone SE, Fold)
   ======================================================== */
@media (max-width: 400px) {
  .app-header {
    padding: env(safe-area-inset-top, 0px) 4px 0 4px;
    gap: 3px;
  }

  .header-left, .header-right, .header-center {
    gap: 3px;
  }

  .brand-text {
    display: none;
  }

  #btn-toggle-lang span {
    display: none;
  }

  #btn-toggle-lang {
    padding: 0 5px;
    min-width: 30px;
  }

  .paper-pill {
    padding: 2px 6px;
  }

  .paper-pill strong {
    font-size: 10px;
  }

  .viewport-area .floating-toolbar {
    max-width: calc(100vw - 8px) !important;
    padding: 4px 6px !important;
    gap: 2px !important;
  }

  .viewport-area .floating-toolbar .tool-btn {
    width: 34px !important;
    height: 34px !important;
    min-width: 34px !important;
    min-height: 34px !important;
  }
}

/* ========================================================
   Standalone PWA / iOS Safe Area insets
   ======================================================== */
@supports (padding: max(0px)) {
  html, body {
    min-height: 100vh;
    min-height: 100dvh;
  }
  .app-header {
    padding-top: max(0px, env(safe-area-inset-top));
    padding-left: max(10px, env(safe-area-inset-left));
    padding-right: max(10px, env(safe-area-inset-right));
  }
  .app-workspace {
    height: calc(100vh - var(--header-height));
    height: calc(100dvh - var(--header-height) - env(safe-area-inset-top, 0px));
    padding-bottom: max(0px, env(safe-area-inset-bottom));
    padding-left: max(0px, env(safe-area-inset-left));
    padding-right: max(0px, env(safe-area-inset-right));
  }
}

/* ========================================================
   EXCEL-STYLE FONT NAME BOX & FORMATTING RIBBON
   ======================================================== */
.excel-font-ribbon {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 85;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.12);
  color: #0f172a;
  touch-action: manipulation;
  transition: opacity 0.2s ease, transform 0.2s ease;
  user-select: none;
}

.excel-font-ribbon.hidden {
  display: none !important;
}

/* Dark mode styling for Excel ribbon */
body.app-theme-dark .excel-font-ribbon {
  background: #1e293b;
  border-color: #334155;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.55);
  color: #f8fafc;
}

.excel-ribbon-group {
  display: flex;
  align-items: center;
  gap: 3px;
}

.excel-ribbon-sep {
  width: 1px;
  height: 20px;
  background: #e2e8f0;
  margin: 0 4px;
  flex-shrink: 0;
}

body.app-theme-dark .excel-ribbon-sep {
  background: #334155;
}

/* Tool Buttons in Excel Ribbon */
.excel-tool-btn {
  width: 30px;
  height: 30px;
  min-width: 30px;
  min-height: 30px;
  padding: 0;
  border-radius: 4px;
  border: 1px solid transparent;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: inherit;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.12s ease;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.excel-tool-btn:hover {
  background: #f1f5f9;
}

body.app-theme-dark .excel-tool-btn:hover {
  background: #334155;
}

.excel-tool-btn.active {
  background: #e0f2fe;
  border-color: #38bdf8;
  color: #0284c7;
}

body.app-theme-dark .excel-tool-btn.active {
  background: rgba(56, 189, 248, 0.18);
  border-color: #38bdf8;
  color: #38bdf8;
}

/* Excel Font Name Combobox */
.excel-font-combobox {
  position: relative;
}

.excel-font-select-btn {
  height: 30px;
  width: 135px;
  padding: 0 8px;
  border-radius: 4px;
  border: 1px solid #cbd5e1;
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: inherit;
  transition: all 0.15s ease;
  touch-action: manipulation;
}

body.app-theme-dark .excel-font-select-btn {
  background: #0f172a;
  border-color: #334155;
}

.excel-font-select-btn:hover {
  border-color: #0284c7;
}

.excel-font-current-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 105px;
  text-align: right;
}

.excel-dropdown-arrow {
  flex-shrink: 0;
  opacity: 0.65;
  margin-right: 4px;
}

/* Font Name Dropdown Menu */
.excel-font-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  width: 290px;
  max-height: 380px;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.18);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 1200;
  animation: excelFadeIn 0.15s cubic-bezier(0.16, 1, 0.3, 1);
}

body.app-theme-dark .excel-font-menu {
  background: #1e293b;
  border-color: #334155;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.6);
}

.excel-font-menu.hidden {
  display: none !important;
}

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

/* Search Row in Font Menu */
.excel-font-search-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px;
  border-bottom: 1px solid #e2e8f0;
  background: #f8fafc;
}

body.app-theme-dark .excel-font-search-row {
  background: #0f172a;
  border-color: #334155;
}

.excel-font-search-input {
  flex: 1;
  height: 28px;
  padding: 0 8px;
  font-size: 12px;
  border-radius: 4px;
  border: 1px solid #cbd5e1;
  background: #ffffff;
  color: inherit;
  outline: none;
}

body.app-theme-dark .excel-font-search-input {
  background: #1e293b;
  border-color: #334155;
}

.excel-font-search-input:focus {
  border-color: #0284c7;
}

.excel-extract-pdf-btn {
  height: 28px;
  padding: 0 8px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 4px;
  border: 1px solid #38bdf8;
  background: #e0f2fe;
  color: #0284c7;
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
  touch-action: manipulation;
}

body.app-theme-dark .excel-extract-pdf-btn {
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border-color: #38bdf8;
}

.excel-extract-pdf-btn:hover {
  background: #0284c7;
  color: #ffffff;
}

/* Font Items Scroll Area */
.excel-font-list-scroll {
  flex: 1;
  overflow-y: auto;
  max-height: 310px;
  padding: 4px 0;
}

.excel-font-section {
  padding: 4px 0;
}

.excel-section-header {
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 700;
  color: #64748b;
  letter-spacing: 0.3px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0,0,0,0.02);
}

body.app-theme-dark .excel-section-header {
  background: rgba(255,255,255,0.02);
  color: #94a3b8;
}

.excel-section-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: #0284c7;
  font-weight: 700;
}

body.app-theme-dark .excel-section-badge {
  color: #38bdf8;
}

.excel-section-count {
  background: #0284c7;
  color: #ffffff;
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 10px;
  font-weight: 700;
}

body.app-theme-dark .excel-section-count {
  background: #38bdf8;
  color: #0f172a;
}

.excel-font-empty {
  padding: 12px 14px;
  text-align: center;
  color: #94a3b8;
  font-size: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.btn-extract-link {
  background: none;
  border: none;
  color: #0284c7;
  font-size: 12px;
  font-weight: 600;
  text-decoration: underline;
  cursor: pointer;
  padding: 2px 4px;
}

body.app-theme-dark .btn-extract-link {
  color: #38bdf8;
}

.excel-font-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 12px;
  cursor: pointer;
  transition: background 0.12s ease;
  border-bottom: 1px solid rgba(0,0,0,0.03);
}

body.app-theme-dark .excel-font-item {
  border-bottom-color: rgba(255,255,255,0.03);
}

.excel-font-item:hover {
  background: #f1f5f9;
}

body.app-theme-dark .excel-font-item:hover {
  background: #334155;
}

.excel-font-item.is-active {
  background: #e0f2fe;
  color: #0284c7;
  font-weight: 700;
}

body.app-theme-dark .excel-font-item.is-active {
  background: rgba(56, 189, 248, 0.18);
  color: #38bdf8;
}

.excel-font-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.excel-font-name-title {
  font-size: 13px;
  line-height: 1.2;
}

.excel-font-preview-sample {
  font-size: 11px;
  opacity: 0.65;
}

.excel-font-badge-pdf {
  font-size: 10px;
  padding: 2px 5px;
  border-radius: 4px;
  background: #e0f2fe;
  color: #0284c7;
  font-weight: 700;
  border: 1px solid #bae6fd;
}

body.app-theme-dark .excel-font-badge-pdf {
  background: rgba(56, 189, 248, 0.2);
  color: #38bdf8;
  border-color: rgba(56, 189, 248, 0.4);
}

/* Font Size Stepper (Input + A▲ / A▼) */
.excel-font-size-wrapper {
  display: flex;
  align-items: center;
  gap: 2px;
}

.excel-font-size-input {
  width: 44px;
  height: 30px;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  background: #f8fafc;
  color: inherit;
  outline: none;
  -moz-appearance: textfield;
  appearance: textfield;
}

.excel-font-size-input::-webkit-outer-spin-button,
.excel-font-size-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

body.app-theme-dark .excel-font-size-input {
  background: #0f172a;
  border-color: #334155;
}

.excel-font-size-input:focus {
  border-color: #0284c7;
}

.excel-size-btn {
  width: 26px;
  height: 30px;
  min-width: 26px;
  border-radius: 4px;
  border: 1px solid #cbd5e1;
  background: #f8fafc;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: inherit;
  transition: all 0.12s ease;
  touch-action: manipulation;
}

body.app-theme-dark .excel-size-btn {
  background: #0f172a;
  border-color: #334155;
}

.excel-size-btn:hover {
  background: #e2e8f0;
}

body.app-theme-dark .excel-size-btn:hover {
  background: #334155;
}

.excel-grow-a {
  font-size: 13px;
  font-weight: 800;
}

.excel-shrink-a {
  font-size: 11px;
  font-weight: 800;
}

.excel-arrow-up, .excel-arrow-down {
  font-size: 8px;
  margin-left: 1px;
  color: #0284c7;
}

body.app-theme-dark .excel-arrow-up,
body.app-theme-dark .excel-arrow-down {
  color: #38bdf8;
}

/* Color Pickers (A with bar & bucket) */
.excel-color-btn-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.excel-color-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  width: 30px;
  height: 30px;
}

.excel-color-letter {
  font-size: 14px;
  font-weight: 800;
  line-height: 1;
}

.excel-color-bar {
  width: 18px;
  height: 3px;
  border-radius: 1px;
  border: 1px solid rgba(0,0,0,0.15);
}

.excel-color-hidden-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 1px;
  height: 1px;
}

/* Close Ribbon Button */
.excel-ribbon-close {
  width: 24px;
  height: 24px;
  min-width: 24px;
  border-radius: 4px;
  border: none;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #94a3b8;
  margin-left: 2px;
  transition: all 0.12s ease;
}

.excel-ribbon-close:hover {
  background: #fee2e2;
  color: #ef4444;
}

body.app-theme-dark .excel-ribbon-close:hover {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
}

/* Sidebar Inspector Font Controls */
.inspector-font-controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.font-select-sidebar {
  width: 100%;
  height: 34px;
  font-weight: 600;
}

.inspector-font-row {
  display: flex;
  gap: 6px;
}

.inspector-btn-row {
  display: flex;
  gap: 3px;
  align-items: center;
  flex-wrap: wrap;
}

.toolbar-sep-mini {
  width: 1px;
  height: 18px;
  background: var(--border-color, #e2e8f0);
  margin: 0 2px;
}

.font-bold-btn strong {
  font-family: serif;
  font-size: 14px;
}

.font-italic-btn em {
  font-family: serif;
  font-size: 14px;
  font-style: italic;
}

.font-underline-btn u {
  font-family: serif;
  font-size: 14px;
}

.font-strike-btn s {
  font-family: serif;
  font-size: 14px;
}

/* Responsive Excel Ribbon for Mobile and Tablets */
@media (max-width: 768px) {
  .excel-font-ribbon {
    position: fixed;
    top: calc(var(--header-height) + env(safe-area-inset-top, 0px) + 6px);
    left: 8px;
    right: 8px;
    transform: none;
    width: auto;
    max-width: calc(100vw - 16px);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x;
    justify-content: flex-start;
    z-index: 100;
  }

  .excel-font-select-btn {
    width: 110px;
  }

  .excel-font-current-name {
    max-width: 80px;
  }
}

@media (max-width: 400px) {
  .excel-tool-btn {
    width: 28px;
    height: 28px;
    min-width: 28px;
  }

  .excel-font-select-btn {
    width: 95px;
    height: 28px;
    font-size: 12px;
  }

  .excel-font-size-input {
    width: 38px;
    height: 28px;
    font-size: 12px;
  }

  .excel-size-btn {
    width: 24px;
    height: 28px;
  }
}