/* ==========================================================================
   Design System & Base Reset
   ========================================================================== */
:root {
  /* Colors */
  --bg-app: #0b0f19;
  --bg-sidebar: #131a26;
  --bg-workspace: #0f141c;
  --bg-card: #1c2533;
  --bg-input: #232f41;
  --border-color: #2e3d54;
  --border-focus: #6366f1;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dark: #1f2937;
  
  /* Accent Colors */
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-gradient: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  --success: #10b981;
  --success-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --danger: #ef4444;
  --danger-gradient: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  --accent: #8b5cf6;
  
  /* Font Stack */
  --font-ui: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-canvas: 0 15px 35px rgba(0, 0, 0, 0.35);
  
  /* Animations */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout Sizing */
  --header-height: 64px;
  --sidebar-left-width: 320px;
  --sidebar-right-width: 340px;
}

@page {
  margin: 0;
}

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

body {
  font-family: var(--font-ui);
  background-color: var(--bg-app);
  color: var(--text-main);
  overflow: hidden;
  height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   Layout Hierarchy
   ========================================================================== */
.app-layout {
  display: grid;
  grid-template-rows: var(--header-height) 1fr;
  height: 100vh;
  width: 100vw;
}

/* Header */
.app-header {
  grid-row: 1;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 24px;
  z-index: 10;
  box-shadow: var(--shadow-md);
}

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

.brand-icon {
  width: 28px;
  height: 28px;
  color: var(--primary);
  filter: drop-shadow(0 2px 8px rgba(99, 102, 241, 0.4));
}

.brand-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #fff 30%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--primary-gradient);
  -webkit-text-fill-color: #fff;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

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

/* Main Workspace */
.app-workspace {
  grid-row: 2;
  display: grid;
  grid-template-columns: var(--sidebar-left-width) 1fr var(--sidebar-right-width);
  height: calc(100vh - var(--header-height));
  width: 100%;
}

/* Sidebars */
.sidebar {
  background-color: var(--bg-sidebar);
  border-color: var(--border-color);
  border-style: solid;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  z-index: 5;
}

.sidebar-left {
  grid-column: 1;
  border-right-width: 1px;
}

.sidebar-right {
  grid-column: 3;
  border-left-width: 1px;
  box-shadow: -5px 0 25px rgba(0, 0, 0, 0.15);
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.section-title {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  border-left: 3px solid var(--primary);
  padding-left: 8px;
  margin-bottom: 4px;
}

/* ==========================================================================
   Interactive Designer Canvas
   ========================================================================== */
.canvas-workspace {
  grid-column: 2;
  background-color: var(--bg-workspace);
  background-image: 
    radial-gradient(#1e293b 1.5px, transparent 1.5px), 
    radial-gradient(#1e293b 1.5px, #0f141c 1.5px);
  background-size: 30px 30px;
  background-position: 0 0, 15px 15px;
  position: relative;
  overflow: hidden;
}

/* Ruler guides */
.workspace-ruler {
  position: absolute;
  background-color: #1e293b;
  font-size: 9px;
  color: var(--text-muted);
  pointer-events: none;
  z-index: 2;
}

.horizontal-ruler {
  top: 0;
  left: 0;
  right: 0;
  height: 18px;
  border-bottom: 1px solid var(--border-color);
}

.vertical-ruler {
  top: 0;
  left: 0;
  bottom: 0;
  width: 18px;
  border-right: 1px solid var(--border-color);
}

.canvas-scale-wrapper {
  position: absolute;
  left: 50%;
  top: 50%;
  overflow: visible;
}

/* The Envelope Sheet */
.envelope-sheet {
  background-color: #ffffff;
  background-image: linear-gradient(145deg, #ffffff 0%, #fafafa 100%);
  border-radius: 4px;
  box-shadow: var(--shadow-canvas);
  position: relative;
  overflow: hidden;
  transition: width 0.3s ease, height 0.3s ease, transform 0.1s ease;
  transform-origin: center center;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

/* Envelope shadow depth highlight */
.envelope-sheet::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.85);
  pointer-events: none;
  border-radius: 4px;
  z-index: 1000;
}

/* Safe margin boundary (5mm offset) */
.safe-margin-guide {
  position: absolute;
  top: 5mm;
  left: 5mm;
  right: 5mm;
  bottom: 5mm;
  border: 1px dashed rgba(99, 102, 241, 0.25);
  pointer-events: none;
  border-radius: 2px;
  z-index: 99;
}

/* Grid overlay helper (layered below text elements, above background) */
.envelope-sheet::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(99, 102, 241, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(99, 102, 241, 0.06) 1px, transparent 1px);
  background-size: 5mm 5mm;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: 1;
}

.envelope-sheet.show-grid-overlay::before {
  opacity: 1;
}

/* ==========================================================================
   Draggable Canvas Elements
   ========================================================================== */
.canvas-element {
  position: absolute;
  user-select: none;
  cursor: grab;
  padding: 6px;
  border: 1px solid transparent;
  border-radius: 3px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
  will-change: transform, left, top, width, height;
}

.canvas-element:hover {
  border-color: rgba(99, 102, 241, 0.3);
}

.canvas-element.selected {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary), 0 4px 12px rgba(99, 102, 241, 0.15);
  cursor: move;
  background-color: rgba(99, 102, 241, 0.02);
  z-index: 999 !important; /* Visual overlay when selecting */
}

/* Active element border helper */
.element-border {
  position: absolute;
  inset: -1px;
  border: 1px dashed var(--primary);
  pointer-events: none;
  display: none;
}

.canvas-element.selected .element-border {
  display: block;
}

/* Element inner structures */
.element-content {
  width: 100%;
  height: 100%;
  color: var(--text-dark);
  word-break: break-word;
  white-space: pre-wrap;
  display: flex;
  flex-direction: column;
}

.element-content.element-text {
  line-height: 1.4;
  outline: none;
}

.element-content.element-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}

.element-content.element-svg svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
  pointer-events: none;
}

/* Resize Handles */
.resize-handle {
  position: absolute;
  width: 8px;
  height: 8px;
  background-color: #fff;
  border: 2px solid var(--primary);
  border-radius: 50%;
  display: none;
  z-index: 10;
}

.canvas-element.selected .resize-handle {
  display: block;
}

/* Placement of handles */
.handle-nw { top: -4px; left: -4px; cursor: nwse-resize; }
.handle-ne { top: -4px; right: -4px; cursor: nesw-resize; }
.handle-sw { bottom: -4px; left: -4px; cursor: nesw-resize; }
.handle-se { bottom: -4px; right: -4px; cursor: nwse-resize; }

/* Double-click inline editor */
.inline-editor {
  position: absolute;
  border: 2px solid var(--accent);
  background: white;
  color: black;
  box-shadow: var(--shadow-xl);
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  padding: 4px;
  box-sizing: border-box;
  resize: none;
  outline: none;
  border-radius: 3px;
  z-index: 2000;
}

/* ==========================================================================
   Buttons and Forms UI Elements
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-ui);
  font-size: 13.5px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-main);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-gradient);
  box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background-color: var(--bg-card);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background-color: var(--bg-input);
  border-color: #3b4e6b;
}

.btn-success {
  background: var(--success-gradient);
  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
}
.btn-success:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(16, 185, 129, 0.4);
}

.btn-danger {
  background: var(--danger-gradient);
}
.btn-danger:hover {
  opacity: 0.9;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12.5px;
}

.btn-block {
  width: 100%;
}

.btn-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.btn-circle:hover {
  background-color: var(--bg-input);
  color: #fff;
}

.btn-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex: 1;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 13px;
  transition: all var(--transition-fast);
}
.btn-toggle:hover {
  color: var(--text-main);
}
.btn-toggle.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 500;
}

/* Helpers */
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}
.flex-column {
  display: flex;
  flex-direction: column;
}
.flex-row {
  display: flex;
  flex-direction: row;
}
.flex-1 {
  flex: 1;
}
.justify-end {
  justify-content: flex-end;
}
.mt-2 { margin-top: 8px; }
.mr-2 { margin-right: 8px; }
.hidden { display: none !important; }
.separator-top {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  margin-top: 8px;
}

.icon {
  width: 16px;
  height: 16px;
}

.icon-sm {
  width: 14px;
  height: 14px;
}

/* Language selector button formatting */
.lang-switcher {
  display: flex;
  gap: 4px;
  background-color: var(--bg-card);
  padding: 4px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

.lang-btn {
  background: transparent;
  border: none;
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  color: var(--text-main);
}

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

/* ==========================================================================
   Left Sidebar Components (Templates & Library)
   ========================================================================== */
.template-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 200px;
  overflow-y: auto;
  padding-right: 4px;
}

.template-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 10px 14px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-fast);
}

.template-card:hover {
  border-color: #3b4e6b;
  transform: translateX(2px);
}

.template-card.active {
  border-color: var(--primary);
  background-color: rgba(99, 102, 241, 0.05);
}

.template-info {
  display: flex;
  flex-direction: column;
}

.template-name {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-main);
}

.template-dims {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 2px;
}

.template-ratio-box {
  width: 36px;
  height: 22px;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  background-color: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  font-weight: 500;
  color: var(--text-muted);
}

.template-card.active .template-ratio-box {
  border-color: var(--primary);
  color: var(--primary);
  background-color: rgba(99, 102, 241, 0.1);
}

/* Orientation controls */
.orientation-switch {
  display: flex;
  gap: 8px;
}

/* Quick Add button styles */
.add-buttons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.btn-add {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 12px 8px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-add:hover {
  border-color: var(--primary);
  color: var(--text-main);
  background-color: rgba(99, 102, 241, 0.02);
}

.btn-add .icon {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

/* Image upload styling */
.upload-zone {
  border: 2px dashed var(--border-color);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  background-color: rgba(255, 255, 255, 0.01);
  transition: all var(--transition-fast);
  text-align: center;
}

.upload-zone:hover {
  border-color: var(--primary);
  background-color: rgba(99, 102, 241, 0.02);
}

.upload-icon {
  width: 28px;
  height: 28px;
  color: var(--text-muted);
}

.upload-zone:hover .upload-icon {
  color: var(--primary);
}

.upload-text {
  font-size: 12px;
  color: var(--text-muted);
}

.file-input-hidden {
  display: none;
}

/* Built-in stamp items */
.preset-title {
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-top: 10px;
  margin-bottom: 2px;
}

.presets-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.preset-item {
  aspect-ratio: 1;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  transition: all var(--transition-fast);
  color: var(--text-muted);
}

.preset-item:hover {
  border-color: var(--primary);
  color: var(--text-main);
  background-color: rgba(99, 102, 241, 0.05);
}

.preset-item svg {
  width: 100%;
  height: 100%;
}

/* ==========================================================================
   Right Sidebar Inspector & Form Styling
   ========================================================================== */
.properties-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
}

.empty-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-text {
  font-size: 13.5px;
  line-height: 1.5;
}

.properties-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
  height: 100%;
  animation: fadeIn 0.2s ease;
}

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

.property-label {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-muted);
}

.property-label-sm {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
}

.form-input {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-main);
  font-family: var(--font-ui);
  font-size: 13.5px;
  padding: 8px 12px;
  transition: all var(--transition-fast);
  width: 100%;
  outline: none;
}

.form-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

textarea.form-input {
  resize: vertical;
}

.form-input-sm {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-main);
  font-family: var(--font-ui);
  font-size: 12px;
  padding: 6px 8px;
  width: 100%;
  outline: none;
}

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

.property-row {
  display: flex;
  gap: 10px;
}

.input-with-unit {
  position: relative;
  display: flex;
  align-items: center;
}

.input-with-unit .unit {
  position: absolute;
  right: 8px;
  font-size: 11px;
  color: var(--text-muted);
  pointer-events: none;
}

.input-with-unit .form-input-sm {
  padding-right: 24px;
}

/* Bold/Italic stylers */
.button-group {
  display: flex;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.btn-icon-toggle {
  background-color: var(--bg-card);
  border: none;
  color: var(--text-muted);
  width: 32px;
  height: 28px;
  cursor: pointer;
  font-family: var(--font-ui);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

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

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

/* Alignment Selector button row */
.align-button-group {
  display: flex;
  gap: 4px;
  background-color: var(--bg-card);
  padding: 3px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  width: fit-content;
}

.btn-align {
  background: transparent;
  border: none;
  width: 30px;
  height: 30px;
  border-radius: 4px;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

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

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

.btn-align svg {
  width: 14px;
  height: 14px;
}

/* Color input wrapper */
.color-picker-wrapper {
  display: flex;
  gap: 8px;
  align-items: center;
}

.color-picker-input {
  -webkit-appearance: none;
  border: none;
  width: 32px;
  height: 28px;
  border-radius: 4px;
  cursor: pointer;
  background: none;
  padding: 0;
}

.color-picker-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-picker-input::-webkit-color-swatch {
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

.color-text-input {
  max-width: 90px;
  text-transform: uppercase;
}

/* Opacity slider range styles */
.range-slider-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
}

.range-slider-wrapper input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-input);
  outline: none;
}

.range-slider-wrapper input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.range-slider-wrapper input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.range-slider-wrapper span {
  font-size: 12px;
  color: var(--text-muted);
  min-width: 36px;
  text-align: right;
}

/* Layer positioning controls */
.layer-actions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.layer-value-indicator {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}

/* Coordinates form layout */
.coordinates-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

/* Custom Checkbox Design */
.checkbox-container {
  display: flex;
  align-items: center;
  position: relative;
  padding-left: 26px;
  cursor: pointer;
  user-select: none;
}

.checkbox-container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkmark {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  left: 0;
  height: 16px;
  width: 16px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.checkbox-container:hover input ~ .checkmark {
  border-color: #3b4e6b;
}

.checkbox-container input:checked ~ .checkmark {
  background-color: var(--primary);
  border-color: var(--primary);
}

.checkmark::after {
  content: "";
  position: absolute;
  display: none;
}

.checkbox-container input:checked ~ .checkmark::after {
  display: block;
}

.checkbox-container .checkmark::after {
  left: 5px;
  top: 2px;
  width: 4px;
  height: 8px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.checkbox-label {
  font-size: 12.5px;
  color: var(--text-muted);
}

.checkbox-container input:checked ~ .checkbox-label {
  color: var(--text-main);
}

/* ==========================================================================
   Canvas Utility Bar (Zoom & Grid switches)
   ========================================================================== */
.canvas-controls {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  padding: 6px 18px;
  box-shadow: var(--shadow-lg);
  max-width: 700px;
  z-index: 10;
}

.envelope-dimensions-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-weight: 500;
}

#zoom-level {
  min-width: 45px;
  text-align: center;
}

.grid-toggle-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

/* Switch styling */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 32px;
  height: 18px;
}

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

.toggle-switch .slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  transition: .2s ease;
  border-radius: 18px;
}

.toggle-switch .slider:before {
  position: absolute;
  content: "";
  height: 12px;
  width: 12px;
  left: 2px;
  bottom: 2px;
  background-color: var(--text-muted);
  transition: .2s ease;
  border-radius: 50%;
}

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

.toggle-switch input:checked + .slider:before {
  transform: translateX(14px);
  background-color: white;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   PRINT MEDIA RULES
   ========================================================================== */
@media print {
  /* Hide all studio dashboard interfaces */
  .app-header, 
  .sidebar, 
  .canvas-controls,
  .workspace-ruler,
  .safe-margin-guide,
  .resize-handle,
  .element-border,
  .envelope-sheet::before {
    display: none !important;
  }

  /* Reset layouts for print bounds */
  .app-layout,
  .app-workspace,
  .canvas-workspace {
    display: block !important;
    background: none !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    margin: 0 !important;
    width: auto !important;
    height: auto !important;
    overflow: visible !important;
    position: static !important;
  }

  /* Expose ONLY the envelope canvas content */
  html, body {
    background-color: #fff !important;
    color: #000 !important;
    margin: 0 !important;
    padding: 0 !important;
    width: 100% !important;
    height: 100% !important;
    overflow: visible !important;
  }

  .canvas-scale-wrapper {
    display: block !important;
    position: static !important;
    left: auto !important;
    top: auto !important;
    padding: 0 !important;
    margin: 0 !important;
    width: auto !important;
    height: auto !important;
    transform: none !important;
    overflow: visible !important;
  }

  .envelope-sheet {
    display: block !important;
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    margin: 0 !important;
    border: none !important;
    box-shadow: none !important;
    background: white !important;
    color: black !important;
    transform: none !important;
    overflow: visible !important;
    page-break-inside: avoid !important;
    page-break-after: avoid !important;
  }

  .canvas-element {
    border: none !important;
    box-shadow: none !important;
    background: transparent !important;
    /* Force elements to render color precisely */
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }

  .canvas-element * {
    color: inherit !important;
  }
}

/* Inline content editing active styling */
.canvas-element.inline-editing-active {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 2px var(--accent), 0 10px 25px rgba(139, 92, 246, 0.25) !important;
  background-color: #ffffff !important;
  cursor: text !important;
  z-index: 10000 !important;
}

.canvas-element.inline-editing-active .element-text {
  outline: none !important;
  cursor: text !important;
  user-select: text !important;
  -webkit-user-select: text !important;
}

/* Hide resize handles when editing text inline */
.canvas-element.inline-editing-active .resize-handle {
  display: none !important;
}