/* ==========================================================================
   MockupStudio — Microsoft Windows 11 / Fluent Design System (WinUI 3)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ==========================================================================
   1. WinUI 3 / Fluent 2 Design Tokens (Dark Theme)
   ========================================================================== */
:root {
  /* --- Typography Font Stacks --- */
  --win-font-family: 'Segoe UI Variable Text', 'Segoe UI Variable Display', 'Segoe UI Variable Small', 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Inter', system-ui, sans-serif;
  --win-font-mono: 'Cascadia Code', 'JetBrains Mono', Consolas, 'Segoe UI Mono', 'Courier New', monospace;

  /* --- Windows 11 Acrylic & Mica Layered Surfaces --- */
  --win-mica-base: #202020;
  --win-mica-alt: #1c1c1c;
  --win-canvas-bg: #181818;
  --win-surface-layer: rgba(255, 255, 255, 0.035);
  --win-surface-card: rgba(255, 255, 255, 0.05);
  --win-surface-card-hover: rgba(255, 255, 255, 0.08);
  --win-surface-card-pressed: rgba(255, 255, 255, 0.03);
  --win-surface-acrylic: rgba(36, 36, 36, 0.92);
  --win-surface-flyout: #2c2c2c;
  --win-surface-dialog: #2e2e2e;

  /* --- Input & Control Surfaces --- */
  --win-control-bg: rgba(255, 255, 255, 0.06);
  --win-control-hover: rgba(255, 255, 255, 0.09);
  --win-control-pressed: rgba(255, 255, 255, 0.035);
  --win-input-bg: rgba(255, 255, 255, 0.06);
  --win-input-hover: rgba(255, 255, 255, 0.085);
  --win-input-focus: #1e1e1e;

  /* --- Fluent 2 Stroke & Elevation Borders --- */
  --win-stroke-card: rgba(255, 255, 255, 0.08);
  --win-stroke-card-hover: rgba(255, 255, 255, 0.14);
  --win-stroke-control: rgba(255, 255, 255, 0.08);
  --win-stroke-control-bottom: rgba(255, 255, 255, 0.14);
  --win-stroke-input-bottom: rgba(255, 255, 255, 0.54);
  --win-stroke-divider: rgba(255, 255, 255, 0.07);
  --win-stroke-subtle: rgba(255, 255, 255, 0.05);

  /* --- Text & Foreground Hierarchy --- */
  --win-text-primary: #ffffff;
  --win-text-secondary: rgba(255, 255, 255, 0.786);
  --win-text-tertiary: rgba(255, 255, 255, 0.545);
  --win-text-disabled: rgba(255, 255, 255, 0.36);
  --win-text-accent: #60cdff;

  /* --- Windows 11 System Accent Palette (Accent Blue #0078D4) --- */
  --win-accent: #0078d4;
  --win-accent-hover: #1886d9;
  --win-accent-pressed: #005fb8;
  --win-accent-light: #60cdff;
  --win-accent-subtle: rgba(96, 205, 255, 0.08);
  --win-accent-subtle-hover: rgba(96, 205, 255, 0.14);
  --win-accent-border: rgba(96, 205, 255, 0.35);

  /* --- System Semantic Colors --- */
  --win-success: #6ccb5f;
  --win-success-bg: rgba(108, 203, 95, 0.14);
  --win-warning: #fce100;
  --win-warning-bg: rgba(252, 225, 0, 0.14);
  --win-danger: #ff99a4;
  --win-danger-bg: rgba(255, 153, 164, 0.14);

  /* --- Windows 11 Directional Elevation Shadows --- */
  --win-shadow-card: 0 2px 4px rgba(0, 0, 0, 0.14), 0 0 1px rgba(0, 0, 0, 0.2);
  --win-shadow-flyout: 0 8px 16px rgba(0, 0, 0, 0.24), 0 0 1px rgba(0, 0, 0, 0.25);
  --win-shadow-dialog: 0 16px 32px rgba(0, 0, 0, 0.36), 0 0 1px rgba(0, 0, 0, 0.3);
  --win-shadow-tooltip: 0 4px 8px rgba(0, 0, 0, 0.22), 0 0 1px rgba(0, 0, 0, 0.2);

  /* --- Windows 11 Corner Radii --- */
  --win-radius-control: 4px;
  --win-radius-medium: 6px;
  --win-radius-card: 8px;
  --win-radius-pill: 20px;

  /* --- Transitions --- */
  --win-transition-fast: 120ms cubic-bezier(0.4, 0, 0.2, 1);
  --win-transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);

  /* --- Legacy Variable Aliases (guarantees 100% compatibility) --- */
  --bg-primary: var(--win-canvas-bg);
  --bg-secondary: var(--win-mica-base);
  --bg-tertiary: #272727;
  --bg-elevated: var(--win-surface-flyout);
  --bg-card: var(--win-surface-card);
  --bg-input: var(--win-input-bg);

  --surface-glass: var(--win-surface-layer);
  --surface-glass-hover: var(--win-surface-card-hover);
  --border-subtle: var(--win-stroke-divider);
  --border-medium: var(--win-stroke-card);
  --border-focus: var(--win-accent-light);

  --text-primary: var(--win-text-primary);
  --text-secondary: var(--win-text-secondary);
  --text-muted: var(--win-text-tertiary);
  --text-accent: var(--win-text-accent);

  --accent-primary: var(--win-accent);
  --accent-primary-hover: var(--win-accent-hover);
  --accent-primary-light: var(--win-accent-light);
  --accent-secondary: var(--win-accent-light);
  --accent-success: var(--win-success);
  --accent-warning: var(--win-warning);
  --accent-danger: var(--win-danger);

  --gradient-primary: linear-gradient(135deg, #0078d4 0%, #005fb8 100%);
  --gradient-cool: linear-gradient(135deg, #0078d4 0%, #60cdff 100%);

  --shadow-sm: var(--win-shadow-card);
  --shadow-md: var(--win-shadow-flyout);
  --shadow-lg: var(--win-shadow-dialog);
  --shadow-glow: 0 0 16px rgba(0, 120, 212, 0.25);

  --radius-sm: var(--win-radius-control);
  --radius-md: var(--win-radius-medium);
  --radius-lg: var(--win-radius-card);
  --radius-xl: var(--win-radius-pill);

  --transition-fast: var(--win-transition-fast);
  --transition-normal: var(--win-transition-normal);

  --sidebar-width: 260px;
  --panel-width: 320px;
  --header-height: 48px;
}

/* ==========================================================================
   2. Reset & Mica Desktop Backdrop
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--win-font-family);
  background-color: var(--win-mica-base);
  /* Atmospheric subtle Windows 11 Mica layered tint */
  background-image:
    radial-gradient(ellipse 90% 45% at 50% -15%, rgba(0, 120, 212, 0.05), transparent 70%),
    radial-gradient(ellipse 60% 40% at 90% 100%, rgba(96, 205, 255, 0.03), transparent 70%);
  background-attachment: fixed;
  color: var(--win-text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  user-select: none;
}

/* Windows 11 Fluent Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.16);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.32);
}

/* Accessible Windows 11 High-Visibility Focus Outline */
:focus-visible {
  outline: 2px solid var(--win-accent-light) !important;
  outline-offset: 2px !important;
}

/* ==========================================================================
   3. Application Shell Layout (Navigation & Command Bar Header)
   ========================================================================== */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  background: transparent;
}

/* --- WinUI 3 Command Bar Header / Title Bar --- */
.app-header {
  height: var(--header-height);
  background: rgba(32, 32, 32, 0.88);
  backdrop-filter: blur(24px) saturate(130%);
  -webkit-backdrop-filter: blur(24px) saturate(130%);
  border-bottom: 1px solid var(--win-stroke-divider);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 16px;
  flex-shrink: 0;
  position: relative;
  z-index: 100;
}

.app-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: default;
  user-select: none;
}

.app-logo-icon {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, #0078d4 0%, #005fb8 100%);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

.app-logo-text {
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: -0.2px;
  color: var(--win-text-primary);
}

.app-logo-text span {
  color: var(--win-accent-light);
  font-weight: 500;
}

/* --- WinUI 3 Navigation View Tabs / Segmented Header --- */
.tab-bar {
  display: flex;
  align-items: center;
  gap: 3px;
  margin-left: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--win-stroke-control);
  border-radius: var(--win-radius-medium);
  padding: 2px;
}

.tab-btn {
  height: 32px;
  padding: 0 12px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--win-text-secondary);
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--win-radius-control);
  transition: all var(--win-transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  white-space: nowrap;
  position: relative;
  box-sizing: border-box;
  line-height: 1;
}

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

.tab-btn.active {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  font-weight: 600;
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* Signature WinUI 3 Bottom Accent Indicator Bar */
.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0px;
  left: 10px;
  right: 10px;
  height: 2px;
  background: var(--win-accent-light);
  border-radius: 2px;
}

.tab-btn .tab-icon {
  font-size: 13px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tab-btn .tab-text {
  display: inline-flex;
  align-items: center;
  line-height: 1;
}

.tab-btn .tab-badge {
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  padding: 0 5px;
  height: 17px;
  min-width: 17px;
  border-radius: 9px;
  font-size: 10px;
  font-family: var(--win-font-mono);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  box-sizing: border-box;
}

.tab-btn.active .tab-badge {
  background: var(--win-accent);
  color: #ffffff;
}

/* Header Actions */
.header-actions {
  margin-left: auto;
  display: flex;
  gap: 6px;
  align-items: center;
}

/* --- Main Content Container --- */
.main-content {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
  overflow: hidden;
  position: relative;
}

.tab-panel {
  grid-column: 1;
  grid-row: 1;
  width: 100%;
  height: 100%;
  visibility: hidden;
  pointer-events: none;
  opacity: 0;
  overflow: hidden;
  transition: opacity 120ms ease;
}

.tab-panel.active {
  display: flex;
  visibility: visible;
  pointer-events: auto;
  opacity: 1;
}

/* ==========================================================================
   4. Tab 1: Template Manager (Navigation Sidebar & Calibration Canvas)
   ========================================================================== */
.tab1-layout {
  width: 100%;
  height: 100%;
  display: flex;
}

/* --- WinUI 3 Navigation Pane Sidebar --- */
.template-sidebar {
  width: var(--sidebar-width);
  background: rgba(32, 32, 32, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--win-stroke-divider);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: width 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

.template-sidebar.collapsed {
  width: 52px;
}

.template-sidebar.collapsed .sidebar-title,
.template-sidebar.collapsed .sidebar-actions,
.template-sidebar.collapsed .template-item .info,
.template-sidebar.collapsed .template-item .status-dot,
.template-sidebar.collapsed .template-item .delete-btn,
.template-sidebar.collapsed .template-item .drag-handle,
.template-sidebar.collapsed .sidebar-empty p {
  display: none !important;
}

.template-sidebar.collapsed .sidebar-header {
  padding: 10px 8px;
  justify-content: center;
}

.template-sidebar.collapsed .sidebar-header-left {
  gap: 0;
}

.template-sidebar.collapsed .template-item {
  justify-content: center;
  padding: 6px 4px;
}

.template-sidebar.collapsed .template-item .thumb {
  width: 36px;
  height: 28px;
}

.sidebar-header {
  height: 42px;
  padding: 0 12px;
  border-bottom: 1px solid var(--win-stroke-divider);
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-sizing: border-box;
  flex-shrink: 0;
}

.sidebar-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--win-text-tertiary);
  line-height: 1;
  display: inline-flex;
  align-items: center;
}

.sidebar-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* --- WinUI 3 ListView (Template List) --- */
.template-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.template-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--win-radius-medium);
  cursor: grab;
  user-select: none;
  transition: background var(--win-transition-fast), border-color var(--win-transition-fast);
  border: 1px solid transparent;
  background: transparent;
  position: relative;
}

.template-item:active {
  cursor: grabbing;
}

.template-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.04);
}

.template-item.selected {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.06);
}

/* WinUI 3 Left Selection Indicator Pill */
.template-item.selected::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 18px;
  background: var(--win-accent-light);
  border-radius: 2px;
}

/* Drag & Drop Reordering States */
.template-item.dragging {
  opacity: 0.35;
  background: rgba(0, 120, 212, 0.12);
  border: 1px dashed var(--win-accent);
  transform: scale(0.98);
}

.template-item.drag-over-top {
  border-top: 2px solid var(--win-accent) !important;
  box-shadow: 0 -2px 6px rgba(0, 120, 212, 0.35);
}

.template-item.drag-over-bottom {
  border-bottom: 2px solid var(--win-accent) !important;
  box-shadow: 0 2px 6px rgba(0, 120, 212, 0.35);
}

.template-item .drag-handle {
  color: var(--win-text-tertiary);
  font-size: 11px;
  cursor: grab;
  opacity: 0.4;
  transition: opacity var(--win-transition-fast), color var(--win-transition-fast);
  flex-shrink: 0;
  line-height: 1;
  padding: 0 2px;
  letter-spacing: -1px;
}

.template-item:hover .drag-handle {
  opacity: 0.9;
  color: var(--win-text-secondary);
}

.template-item .thumb {
  width: 44px;
  height: 34px;
  border-radius: var(--win-radius-control);
  object-fit: cover;
  background: var(--win-canvas-bg);
  border: 1px solid var(--win-stroke-control);
  flex-shrink: 0;
}

.template-item .info {
  flex: 1;
  min-width: 0;
}

.template-item .name {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--win-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.template-item .meta {
  font-size: 10.5px;
  font-family: var(--win-font-mono);
  color: var(--win-text-tertiary);
}

.template-item .status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--win-text-tertiary);
  flex-shrink: 0;
}

.template-item .status-dot.calibrated {
  background: var(--win-success);
  box-shadow: 0 0 6px rgba(108, 203, 95, 0.45);
}

.template-item .delete-btn {
  opacity: 0;
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 22px;
  height: 22px;
  border: none;
  background: rgba(255, 153, 164, 0.12);
  color: var(--win-danger);
  border-radius: var(--win-radius-control);
  cursor: pointer;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--win-transition-fast);
}

.template-item:hover .delete-btn {
  opacity: 1;
}

.template-item .delete-btn:hover {
  background: rgba(255, 153, 164, 0.25);
  color: #ffffff;
}

/* Inline Edit Input */
.name-edit-input {
  width: 100%;
  font-size: 12.5px;
  font-weight: 500;
  font-family: inherit;
  color: #ffffff;
  background: var(--win-input-focus);
  border: 1px solid var(--win-stroke-control);
  border-bottom: 2px solid var(--win-accent-light) !important;
  border-radius: var(--win-radius-control);
  padding: 2px 6px;
  outline: none;
}

/* Sidebar Empty State */
.sidebar-empty {
  padding: 36px 16px;
  text-align: center;
  color: var(--win-text-tertiary);
}

.sidebar-empty .empty-icon {
  font-size: 32px;
  margin-bottom: 8px;
  opacity: 0.6;
}

.sidebar-empty p {
  font-size: 12.5px;
  line-height: 1.6;
}

/* ==========================================================================
   5. Canvas Viewports, Toolbars & Status Bar
   ========================================================================== */
.canvas-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--win-canvas-bg);
  position: relative;
  overflow: hidden;
}

/* --- WinUI 3 Command Bar (Toolbar) --- */
.canvas-toolbar {
  height: 42px;
  background: rgba(32, 32, 32, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--win-stroke-divider);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 6px;
  flex-shrink: 0;
  box-sizing: border-box;
}

.toolbar-sep {
  width: 1px;
  height: 18px;
  background: var(--win-stroke-divider);
  margin: 0 4px;
  flex-shrink: 0;
}

.toolbar-item-group {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  color: var(--win-text-secondary);
  white-space: nowrap;
  flex-shrink: 0;
  height: 26px;
}

.toolbar-label {
  font-size: 11.5px;
  color: var(--win-text-tertiary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
  line-height: 1;
}

.toolbar-label svg {
  display: block;
  flex-shrink: 0;
}

#ref-color-value {
  font-family: var(--win-font-mono) !important;
  font-size: 11px;
  color: var(--win-text-primary);
  background: var(--win-control-bg);
  padding: 0 6px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--win-radius-control);
  border: 1px solid var(--win-stroke-control);
  line-height: 1;
  box-sizing: border-box;
}

.form-select-sm,
#select-drag-speed {
  background: var(--win-input-bg);
  border: 1px solid var(--win-stroke-control);
  border-bottom: 1px solid var(--win-stroke-input-bottom);
  color: var(--win-text-primary);
  border-radius: var(--win-radius-control);
  padding: 3px 22px 3px 8px;
  font-size: 11px;
  height: 26px;
  line-height: normal;
  cursor: pointer;
  outline: none;
  font-family: inherit;
  transition: all var(--win-transition-fast);
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' fill='%23c8c8c8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11.5l-5-5 1.4-1.4L8 8.7l3.6-3.6L13 6.5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 7px center;
  box-sizing: border-box;
  vertical-align: middle;
}

.form-select-sm:hover,
#select-drag-speed:hover {
  background-color: var(--win-input-hover);
  border-bottom-color: rgba(255, 255, 255, 0.75);
}

.form-select-sm:focus,
#select-drag-speed:focus {
  background-color: var(--win-input-focus);
  border-bottom: 2px solid var(--win-accent-light) !important;
}

.toolbar-spacer {
  flex: 1;
}

/* Eyedropper Ref Color Swatch */
.ref-color-swatch {
  width: 18px;
  height: 18px;
  border-radius: var(--win-radius-control);
  border: 1.5px solid var(--win-stroke-control);
  display: inline-flex;
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  box-sizing: border-box;
}

/* Canvas Viewport Containers */
.canvas-container,
.tab2-canvas-container,
.tab3-canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    repeating-conic-gradient(#222222 0% 25%, #181818 0% 50%) 0 0 / 20px 20px;
  box-shadow: inset 0 0 1px rgba(255, 255, 255, 0.05);
}

.canvas-wrapper {
  position: relative;
  transform-origin: center center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

.canvas-wrapper canvas {
  display: block;
}

/* Draggable Corner Pins (WinUI 3 Fluent Handles) */
.handle-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.corner-handle {
  position: absolute;
  width: 16px;
  height: 16px;
  background: var(--win-accent);
  border: 2.5px solid #ffffff;
  border-radius: 50%;
  cursor: grab;
  pointer-events: all;
  transform: translate(-50%, -50%);
  transition: transform 100ms ease, box-shadow 120ms ease;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.45), 0 0 0 2px rgba(0, 120, 212, 0.3);
  z-index: 10;
}

.corner-handle:hover {
  transform: translate(-50%, -50%) scale(1.25);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.5), 0 0 0 4px rgba(0, 120, 212, 0.4);
}

.corner-handle.active {
  background: var(--win-accent-light);
  border-color: #ffffff;
  box-shadow: 0 0 0 5px rgba(96, 205, 255, 0.45), 0 4px 12px rgba(0, 0, 0, 0.6);
  z-index: 12;
}

.corner-handle.active .handle-label {
  color: #ffffff;
  background: var(--win-accent);
}

.corner-handle.dragging {
  cursor: grabbing;
  transform: translate(-50%, -50%) scale(1.35);
  background: var(--win-accent-pressed);
  box-shadow: 0 0 0 6px rgba(0, 120, 212, 0.45), 0 6px 16px rgba(0, 0, 0, 0.6);
}

.corner-handle .handle-label {
  position: absolute;
  top: -22px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  font-family: var(--win-font-mono);
  font-weight: 600;
  color: #ffffff;
  background: rgba(32, 32, 32, 0.92);
  border: 1px solid var(--win-stroke-control);
  padding: 1px 5px;
  border-radius: var(--win-radius-control);
  white-space: nowrap;
  pointer-events: none;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* Perspective Quad Outline */
.quad-outline {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* Magnifier Loupe Lens (WinUI 3 Acrylic Lens) */
.magnifier-loupe {
  position: fixed;
  width: 600px;
  height: 600px;
  max-width: 85vw;
  max-height: 85vh;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 2.5px solid var(--win-accent);
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.7), 0 24px 48px rgba(0, 0, 0, 0.8), 0 0 20px rgba(0, 120, 212, 0.35);
  overflow: hidden;
  pointer-events: none;
  z-index: 10000;
  display: none;
  background: var(--win-canvas-bg);
}

.magnifier-loupe canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.magnifier-loupe .crosshair {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 36px;
  pointer-events: none;
}

.magnifier-loupe .crosshair::before,
.magnifier-loupe .crosshair::after {
  content: '';
  position: absolute;
  background: #ffffff;
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.9), 0 0 1px #000000;
}

.magnifier-loupe .crosshair::before {
  width: 2px;
  height: 100%;
  left: 50%;
  transform: translateX(-50%);
}

.magnifier-loupe .crosshair::after {
  height: 2px;
  width: 100%;
  top: 50%;
  transform: translateY(-50%);
}

.magnifier-badge {
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(32, 32, 32, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--win-accent-light);
  font-size: 12px;
  font-family: var(--win-font-mono);
  font-weight: 700;
  padding: 3px 12px;
  border-radius: var(--win-radius-pill);
  letter-spacing: 0.6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  pointer-events: none;
}

/* --- Windows 11 Status Bar --- */
.canvas-status {
  height: 28px;
  background: #1c1c1c;
  border-top: 1px solid var(--win-stroke-divider);
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 16px;
  font-size: 11px;
  font-family: var(--win-font-mono);
  color: var(--win-text-tertiary);
  flex-shrink: 0;
}

.canvas-status .status-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Eyedropper active state */
.eyedropper-cursor,
.eyedropper-cursor * {
  cursor: crosshair !important;
}

/* ==========================================================================
   6. Tab 2 & 3: Panels, Mockup Grid & Controls
   ========================================================================== */
.tab2-layout,
.tab3-layout {
  display: flex;
  width: 100%;
  height: 100%;
}

.tab2-canvas-area,
.tab3-canvas-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* --- WinUI 3 Adjustment Panels --- */
.adjustment-panel {
  width: var(--panel-width);
  max-width: var(--panel-width);
  background: rgba(32, 32, 32, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
  overflow-x: hidden;
  box-sizing: border-box;
  padding: 14px 16px 24px 16px;
}

.adjustment-panel>* {
  flex-shrink: 0;
}

.watermark-panel {
  width: var(--panel-width);
  max-width: var(--panel-width);
  background: rgba(32, 32, 32, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-left: 1px solid var(--win-stroke-divider);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
  overflow-x: hidden;
  box-sizing: border-box;
  padding-bottom: 24px;
}

.tab2-left-panel {
  border-left: none !important;
  border-right: 1px solid var(--win-stroke-divider);
}

.tab2-right-panel {
  border-left: 1px solid var(--win-stroke-divider);
}

.panel-divider {
  height: 1px;
  background: var(--win-stroke-divider);
  margin: 14px 0;
  flex-shrink: 0;
  width: 100%;
}

.panel-section {
  padding: 14px 16px;
  border-bottom: 1px solid var(--win-stroke-divider);
  box-sizing: border-box;
  max-width: 100%;
  overflow: visible;
}

.panel-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--win-text-tertiary);
  margin-bottom: 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  line-height: 1;
}

.section-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  line-height: 1;
  flex-shrink: 0;
}

.panel-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.panel-section-header .panel-section-title {
  margin-bottom: 0;
}

.carousel-nav-btns {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* --- WinUI 3 Mockup Square Grid (Tab 2) --- */
.template-carousel {
  --mockup-grid-gap: 6px;
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--mockup-grid-gap);
  padding: 2px;
  box-sizing: border-box;
  width: 100%;
  flex-shrink: 0;
}

.template-carousel>div:not(.carousel-item),
.template-carousel-empty {
  grid-column: 1 / -1;
  color: var(--win-text-tertiary);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 18px 8px;
}

/* Square Mockup Tile (WinUI 3 Card) */
.carousel-item {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--win-radius-medium);
  overflow: hidden;
  cursor: grab;
  user-select: none;
  border: 1px solid var(--win-stroke-card);
  transition: all var(--win-transition-fast);
  position: relative;
  background: var(--win-surface-card);
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  flex-shrink: 0;
}

.carousel-item:active {
  cursor: grabbing;
}

.carousel-item:hover {
  background: var(--win-surface-card-hover);
  border-color: var(--win-stroke-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.25);
}

.carousel-item.selected {
  border: 2px solid var(--win-accent) !important;
  box-shadow: 0 0 0 1px var(--win-accent-light);
}

.carousel-item.dragging {
  opacity: 0.35;
  border: 2px dashed var(--win-accent) !important;
  transform: scale(0.95);
}

.carousel-item.drag-over {
  border-color: var(--win-accent-light) !important;
  box-shadow: 0 0 14px rgba(96, 205, 255, 0.5) !important;
  transform: scale(1.03);
}

.carousel-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none;
}

/* WinUI 3 Circle Checkmark Badge */
.carousel-item .check-badge {
  display: none;
  position: absolute;
  bottom: 4px;
  right: 4px;
  width: 16px;
  height: 16px;
  background: var(--win-accent);
  border: 1px solid #ffffff;
  border-radius: 50%;
  font-size: 9px;
  font-weight: 700;
  color: white;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.carousel-item.selected .check-badge {
  display: flex;
}

/* Active Mockup Info Card (WinUI 3 Card) */
.active-mockup-card {
  margin-top: 10px;
  padding: 10px 12px;
  background: var(--win-surface-card);
  border: 1px solid var(--win-stroke-card);
  border-radius: var(--win-radius-medium);
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-sizing: border-box;
  width: 100%;
  overflow: hidden;
}

.active-mockup-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.active-mockup-title {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--win-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 170px;
}

.active-mockup-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--win-radius-pill);
  background: var(--win-success-bg);
  color: var(--win-success);
  border: 1px solid rgba(108, 203, 95, 0.3);
  white-space: nowrap;
}

.active-mockup-badge.uncalibrated {
  background: var(--win-warning-bg);
  color: var(--win-warning);
  border-color: rgba(252, 225, 0, 0.35);
}

.active-mockup-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--win-stroke-divider);
  padding-top: 6px;
  font-size: 11px;
}

.active-mockup-meta {
  color: var(--win-text-tertiary);
  font-family: var(--win-font-mono);
}

.btn-reset-mockup {
  background: none;
  border: none;
  color: var(--win-accent-light);
  font-size: 11px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: var(--win-radius-control);
  transition: all var(--win-transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  line-height: 1;
}

.btn-reset-mockup svg {
  display: block;
  flex-shrink: 0;
}

.btn-reset-mockup:hover {
  background: var(--win-accent-subtle);
  color: #ffffff;
}

/* --- WinUI 3 Artwork Grid (Tab 2) --- */
.artwork-carousel {
  --art-grid-gap: 6px;
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--art-grid-gap);
  padding: 2px;
  box-sizing: border-box;
  width: 100%;
  border-radius: var(--win-radius-card);
  margin-bottom: 10px;
  flex-shrink: 0;
}

.artwork-carousel:empty {
  display: none;
}

.artwork-item {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--win-radius-medium);
  overflow: hidden;
  cursor: pointer;
  background: var(--win-card-bg);
  border: 1px solid var(--win-stroke-control);
  transition: all var(--win-transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  flex-shrink: 0;
}

.artwork-item:hover {
  border-color: var(--win-stroke-control-hover);
  background: var(--win-card-bg-hover);
  transform: translateY(-1px);
  box-shadow: var(--win-elevation-card);
}

.artwork-item.selected {
  border: 2px solid var(--win-accent);
  box-shadow: 0 0 0 1px rgba(0, 120, 212, 0.3), var(--win-elevation-card);
}

.artwork-item-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #141414;
}

.artwork-item-badge {
  position: absolute;
  bottom: 4px;
  left: 4px;
  right: 4px;
  background: rgba(18, 18, 18, 0.85);
  backdrop-filter: blur(8px);
  color: var(--win-text-primary);
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.artwork-item-check {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 18px;
  height: 18px;
  background: var(--win-accent);
  color: #fff;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.artwork-item.selected .artwork-item-check {
  display: flex;
}

.artwork-item-delete {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 20px;
  height: 20px;
  background: rgba(220, 53, 69, 0.85);
  color: #fff;
  border-radius: 4px;
  border: none;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  cursor: pointer;
  transition: all var(--win-transition-fast);
}

.artwork-item:hover .artwork-item-delete {
  display: flex;
}

.artwork-item-delete:hover {
  background: #dc3545;
  transform: scale(1.1);
}

/* Upload Dropzones (WinUI 3 Dropzone) */
.upload-zone {
  border: 1px dashed rgba(255, 255, 255, 0.22);
  border-radius: var(--win-radius-card);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--win-transition-normal);
  background: rgba(255, 255, 255, 0.02);
}

.upload-zone:hover {
  border-color: var(--win-accent);
  background: rgba(0, 120, 212, 0.06);
}

.upload-zone.drag-over {
  border-color: var(--win-accent-light);
  background: rgba(96, 205, 255, 0.1);
  box-shadow: inset 0 0 16px rgba(0, 120, 212, 0.12);
}

.upload-zone .upload-icon {
  font-size: 28px;
  margin-bottom: 6px;
  opacity: 0.7;
}

.upload-zone .upload-text {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--win-text-secondary);
  margin-bottom: 2px;
}

.upload-zone .upload-hint {
  font-size: 11px;
  color: var(--win-text-tertiary);
}

/* ==========================================================================
   7. WinUI 3 Sliders, Toggles, Inputs & Form Controls
   ========================================================================== */
.slider-group {
  margin-bottom: 12px;
}

.slider-group:last-child {
  margin-bottom: 0;
}

.slider-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.slider-label-text {
  font-size: 12px;
  color: var(--win-text-secondary);
  font-weight: 500;
}

.slider-value {
  font-size: 11px;
  font-family: var(--win-font-mono);
  color: var(--win-accent-light);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--win-stroke-control);
  padding: 1px 6px;
  border-radius: var(--win-radius-control);
  min-width: 40px;
  text-align: center;
}

/* WinUI 3 Range Slider */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.28);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  position: relative;
  transition: background var(--win-transition-fast);
}

input[type="range"]:hover {
  background: rgba(255, 255, 255, 0.38);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--win-accent);
  border: 4px solid #ffffff;
  cursor: pointer;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.35);
  transition: transform var(--win-transition-fast), background var(--win-transition-fast), box-shadow var(--win-transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  background: var(--win-accent-hover);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.45);
}

input[type="range"]::-webkit-slider-thumb:active {
  transform: scale(0.95);
  background: var(--win-accent-pressed);
  border-color: #ededed;
}

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--win-accent);
  border: 4px solid #ffffff;
  cursor: pointer;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.35);
}

/* WinUI 3 Text Input (Bottom border accent highlight on focus) */
.form-input {
  width: 100%;
  padding: 6px 10px;
  background: var(--win-input-bg);
  border: 1px solid var(--win-stroke-control);
  border-bottom: 1px solid var(--win-stroke-input-bottom);
  border-radius: var(--win-radius-control);
  color: var(--win-text-primary);
  font-family: inherit;
  font-size: 12.5px;
  outline: none;
  transition: all var(--win-transition-fast);
}

.form-input:hover {
  background: var(--win-input-hover);
  border-color: rgba(255, 255, 255, 0.12);
  border-bottom-color: rgba(255, 255, 255, 0.75);
}

.form-input:focus {
  background: var(--win-input-focus);
  border-color: var(--win-stroke-control);
  border-bottom: 2px solid var(--win-accent-light) !important;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

.form-input::placeholder {
  color: var(--win-text-disabled);
}

/* WinUI 3 ComboBox / Select Dropdown */
.form-select {
  width: 100%;
  padding: 6px 28px 6px 10px;
  background: var(--win-input-bg);
  border: 1px solid var(--win-stroke-control);
  border-bottom: 1px solid var(--win-stroke-input-bottom);
  border-radius: var(--win-radius-control);
  color: var(--win-text-primary);
  font-family: inherit;
  font-size: 12px;
  outline: none;
  cursor: pointer;
  transition: all var(--win-transition-fast);
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' fill='%23c8c8c8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11.5l-5-5 1.4-1.4L8 8.7l3.6-3.6L13 6.5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.form-select:hover {
  background-color: var(--win-input-hover);
  border-bottom-color: rgba(255, 255, 255, 0.75);
}

.form-select:focus {
  background-color: var(--win-input-focus);
  border-bottom: 2px solid var(--win-accent-light) !important;
}

.form-row {
  margin-bottom: 10px;
}

.form-row:last-child {
  margin-bottom: 0;
}

.form-label {
  display: block;
  font-size: 12px;
  color: var(--win-text-secondary);
  font-weight: 500;
  margin-bottom: 4px;
}

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

.color-picker-wrapper input[type="color"] {
  width: 32px;
  height: 28px;
  border: 1px solid var(--win-stroke-control);
  border-radius: var(--win-radius-control);
  cursor: pointer;
  padding: 0;
  background: none;
  -webkit-appearance: none;
}

.color-picker-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 2px;
}

.color-picker-wrapper input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: 2px;
}

/* --- WinUI 3 Toggle Switch (Native Windows 11 Pill Switch) --- */
.toggle-control {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0;
}

.toggle-switch {
  position: relative;
  width: 40px;
  height: 20px;
  cursor: pointer;
}

.toggle-switch input {
  display: none;
}

.toggle-track {
  position: absolute;
  inset: 0;
  background: transparent;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  transition: all var(--win-transition-fast);
}

.toggle-switch:hover .toggle-track {
  border-color: rgba(255, 255, 255, 0.75);
  background: rgba(255, 255, 255, 0.04);
}

.toggle-switch input:checked+.toggle-track {
  background: var(--win-accent);
  border-color: var(--win-accent);
}

.toggle-switch input:checked:hover+.toggle-track {
  background: var(--win-accent-hover);
  border-color: var(--win-accent-hover);
}

.toggle-knob {
  position: absolute;
  top: 3.5px;
  left: 4px;
  width: 12px;
  height: 12px;
  background: #ffffff;
  border-radius: 50%;
  transition: transform 180ms cubic-bezier(0.85, 0, 0.15, 1);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

.toggle-switch input:checked~.toggle-knob {
  transform: translateX(18px);
}

/* ==========================================================================
   8. WinUI 3 Button Styles
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 14px;
  min-height: 32px;
  height: auto;
  border: 1px solid var(--win-stroke-control);
  border-bottom: 1px solid var(--win-stroke-control-bottom);
  border-radius: var(--win-radius-control);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--win-transition-fast);
  white-space: normal;
  word-break: break-word;
  overflow-wrap: break-word;
  text-align: center;
  line-height: 1.35;
  box-shadow: var(--win-shadow-card);
  box-sizing: border-box;
}

.btn > span,
.btn > label {
  display: inline-block;
  min-width: 0;
  white-space: normal;
  word-break: break-word;
  overflow-wrap: break-word;
  text-align: inherit;
  line-height: inherit;
}

.btn.sm {
  height: 26px;
  min-height: 26px;
  padding: 0 10px;
  font-size: 11.5px;
  gap: 5px;
  line-height: 1;
  white-space: nowrap;
}

/* WinUI 3 Standard Button */
.btn-secondary {
  background: var(--win-control-bg);
  color: var(--win-text-primary);
  border-color: var(--win-stroke-control);
}

.btn-secondary:hover {
  background: var(--win-control-hover);
  border-color: rgba(255, 255, 255, 0.14);
  transform: translateY(-1px);
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.18);
}

.btn-secondary:active {
  background: var(--win-control-pressed);
  transform: translateY(0) scale(0.985);
  color: rgba(255, 255, 255, 0.7);
  box-shadow: none;
}

/* WinUI 3 Accent / Primary Button */
.btn-primary,
.btn-gradient {
  background: var(--win-accent);
  color: #ffffff;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-bottom: 1px solid rgba(0, 0, 0, 0.35);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.18);
}

.btn-primary:hover,
.btn-gradient:hover {
  background: var(--win-accent-hover);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 120, 212, 0.35);
}

.btn-primary:active,
.btn-gradient:active {
  background: var(--win-accent-pressed);
  transform: translateY(0) scale(0.985);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Save / Success Button */
.btn-success {
  background: var(--win-accent);
  color: #ffffff;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-bottom: 1px solid rgba(0, 0, 0, 0.35);
}

.btn-success:hover {
  background: var(--win-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 120, 212, 0.35);
}

.btn-success:active {
  background: var(--win-accent-pressed);
  transform: translateY(0) scale(0.985);
}

/* Subtle / Ghost Button */
.btn-ghost {
  background: transparent;
  border: 1px solid transparent;
  color: var(--win-text-secondary);
  box-shadow: none;
  padding: 5px 8px;
}

.btn-ghost:hover {
  background: var(--win-control-bg);
  color: var(--win-text-primary);
  border-color: var(--win-stroke-control);
}

.btn-ghost:active {
  background: var(--win-control-pressed);
  transform: scale(0.985);
}

/* Icon Buttons */
.btn-icon {
  width: 30px;
  height: 30px;
  padding: 0;
  border-radius: var(--win-radius-control);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  flex-shrink: 0;
  box-sizing: border-box;
}

.btn-icon.sm {
  width: 26px;
  height: 26px;
  font-size: 11.5px;
  line-height: 1;
  flex-shrink: 0;
  box-sizing: border-box;
}

.btn-icon svg,
.btn svg {
  display: block;
  pointer-events: none;
  flex-shrink: 0;
}

.btn-danger {
  background: var(--win-danger-bg);
  color: var(--win-danger);
  border: 1px solid rgba(255, 153, 164, 0.25);
}

.btn-danger:hover {
  background: rgba(255, 153, 164, 0.25);
  color: #ffffff;
}

.btn-lg {
  padding: 10px 16px;
  font-size: 13px;
  min-height: 40px;
  height: auto;
  white-space: normal;
  word-break: break-word;
  overflow-wrap: break-word;
  text-align: center;
  line-height: 1.35;
}

/* ==========================================================================
   9. Tab 3: Resolution Presets, Custom Res & Size Estimator
   ========================================================================== */
/* WinUI 3 Segmented Mode Toggle */
.mode-toggle,
.export-format,
.preset-mode-tabs {
  display: flex;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--win-stroke-control);
  border-radius: var(--win-radius-medium);
  padding: 2px;
  gap: 2px;
}

.mode-toggle-btn,
.format-btn,
.preset-mode-btn {
  flex: 1;
  padding: 5px 10px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--win-text-secondary);
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--win-radius-control);
  transition: all var(--win-transition-fast);
  text-align: center;
}

.mode-toggle-btn:hover,
.format-btn:hover,
.preset-mode-btn:hover {
  color: var(--win-text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.mode-toggle-btn.active,
.format-btn.active,
.preset-mode-btn.active {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  font-weight: 600;
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.wm-text-controls,
.wm-image-controls {
  margin-top: 12px;
}

.wm-text-controls.hidden,
.wm-image-controls.hidden {
  display: none;
}

/* Output Resolution Pencil Header */
.res-slider-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.res-label-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-res-pencil {
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  padding: 0;
  width: 22px;
  height: 22px;
  border-radius: var(--win-radius-control);
  color: var(--win-text-tertiary);
  transition: all var(--win-transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  line-height: 1;
  box-sizing: border-box;
}

.btn-res-pencil svg {
  display: block;
  pointer-events: none;
  flex-shrink: 0;
}

.btn-res-pencil:hover {
  background: var(--win-control-bg);
  border-color: var(--win-stroke-control);
  color: var(--win-accent-light);
}

.btn-res-pencil.active {
  background: var(--win-accent-subtle);
  border-color: var(--win-accent-light);
  color: var(--win-accent-light);
}

/* WinUI 3 Preset Manager Drawer (Flyout Card) */
.preset-manager-panel {
  background: rgba(38, 38, 38, 0.98);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--win-stroke-card-hover);
  border-radius: var(--win-radius-card);
  padding: 12px;
  margin-bottom: 12px;
  box-shadow: var(--win-shadow-flyout);
  animation: winFadeIn 120ms ease-out;
}

.preset-manager-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--win-stroke-divider);
}

.preset-manager-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--win-text-primary);
  display: flex;
  align-items: center;
  gap: 5px;
}

.btn-preset-manager-close {
  background: transparent;
  border: none;
  color: var(--win-text-tertiary);
  cursor: pointer;
  padding: 0;
  width: 22px;
  height: 22px;
  border-radius: var(--win-radius-control);
  transition: all var(--win-transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  flex-shrink: 0;
}

.btn-preset-manager-close svg {
  display: block;
  pointer-events: none;
  flex-shrink: 0;
}

.btn-preset-manager-close:hover {
  background: var(--win-control-bg);
  color: #ffffff;
}

.preset-manager-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 180px;
  overflow-y: auto;
  margin-bottom: 12px;
}

.preset-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 8px;
  background: var(--win-surface-card);
  border: 1px solid var(--win-stroke-control);
  border-radius: var(--win-radius-control);
  transition: all var(--win-transition-fast);
  gap: 8px;
}

.preset-item-row:hover {
  border-color: var(--win-stroke-card-hover);
  background: var(--win-surface-card-hover);
}

.preset-item-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1;
}

.preset-item-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--win-text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.preset-active-tag {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--win-success);
  background: var(--win-success-bg);
  padding: 1px 5px;
  border-radius: 3px;
}

.preset-item-spec {
  font-size: 10px;
  font-family: var(--win-font-mono);
  color: var(--win-text-tertiary);
}

.btn-del-preset {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  width: 24px;
  height: 24px;
  border-radius: var(--win-radius-control);
  color: var(--win-text-tertiary);
  transition: all var(--win-transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  flex-shrink: 0;
  box-sizing: border-box;
}

.btn-del-preset svg {
  display: block;
  pointer-events: none;
  flex-shrink: 0;
}

.btn-del-preset:hover:not(:disabled) {
  background: var(--win-danger-bg);
  color: var(--win-danger);
}

.preset-add-section {
  padding-top: 10px;
  border-top: 1px solid var(--win-stroke-divider);
}

.preset-add-title {
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--win-text-secondary);
  margin-bottom: 8px;
}

.preset-add-fields {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.preset-dim-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.preset-dim-label {
  font-size: 11px;
  color: var(--win-text-tertiary);
  white-space: nowrap;
}

.preset-manager-footer {
  display: flex;
  justify-content: flex-end;
  margin-top: 10px;
  padding-top: 6px;
  border-top: 1px solid var(--win-stroke-divider);
}

.btn-preset-reset {
  background: transparent;
  border: none;
  font-size: 11px;
  color: var(--win-text-tertiary);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: var(--win-radius-control);
  transition: all var(--win-transition-fast);
}

.btn-preset-reset:hover {
  color: var(--win-accent-light);
  text-decoration: underline;
}

/* Resolution Presets Grid */
.resolution-presets {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
  margin-bottom: 10px;
}

.preset-btn {
  padding: 7px 10px;
  border: 1px solid var(--win-stroke-control);
  background: var(--win-input-bg);
  color: var(--win-text-secondary);
  font-family: inherit;
  font-size: 11.5px;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--win-radius-control);
  transition: all var(--win-transition-fast);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.preset-btn:hover {
  background: var(--win-control-hover);
  color: var(--win-text-primary);
  border-color: rgba(255, 255, 255, 0.12);
}

.preset-btn.active {
  border-color: var(--win-accent) !important;
  color: #ffffff;
  background: var(--win-accent-subtle);
  font-weight: 600;
  box-shadow: 0 0 0 1px var(--win-accent);
}

/* Custom Resolution Controls */
.custom-res-container {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--win-stroke-card);
  border-radius: var(--win-radius-medium);
  padding: 10px;
  margin-bottom: 12px;
  animation: winFadeIn 120ms ease-out;
}

.custom-res-inputs {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.res-input-field {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.res-input-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--win-text-tertiary);
}

.res-input {
  padding: 5px 8px;
  font-size: 12px;
  font-family: var(--win-font-mono);
  text-align: center;
  border-radius: var(--win-radius-control);
}

.btn-aspect-lock {
  width: 30px;
  height: 30px;
  background: var(--win-control-bg);
  border: 1px solid var(--win-stroke-control);
  border-radius: var(--win-radius-control);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
  color: var(--win-text-tertiary);
  transition: all var(--win-transition-fast);
  box-sizing: border-box;
  flex-shrink: 0;
}

#aspect-lock-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.btn-aspect-lock:hover {
  border-color: var(--win-stroke-card-hover);
  color: var(--win-text-primary);
}

.btn-aspect-lock.active {
  border-color: var(--win-accent);
  background: var(--win-accent-subtle);
  color: var(--win-accent-light);
}

/* WinUI 3 Estimated File Size Badge (InfoBar Card) */
.est-size-badge {
  background: var(--win-accent-subtle);
  border: 1px solid var(--win-accent-border);
  border-radius: var(--win-radius-medium);
  padding: 8px 12px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  transition: all var(--win-transition-fast);
}

.est-size-header {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--win-text-secondary);
}

.est-size-icon {
  font-size: 13px;
}

.est-size-val {
  font-family: var(--win-font-mono);
  color: var(--win-accent-light);
  font-size: 12.5px;
  font-weight: 600;
}

.est-size-dims {
  font-size: 10.5px;
  font-family: var(--win-font-mono);
  color: var(--win-text-tertiary);
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 1px 6px;
  border-radius: var(--win-radius-control);
}

.export-buttons {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}

.export-buttons .btn {
  width: 100%;
  height: auto;
  min-height: 42px;
  padding: 8px 12px;
  white-space: normal;
  word-break: break-word;
  overflow-wrap: break-word;
  text-align: center;
  line-height: 1.35;
}

/* WinUI 3 Progress Bar */
.progress-bar {
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 8px;
}

.progress-fill {
  height: 100%;
  background: var(--win-accent);
  border-radius: 2px;
  transition: width 0.25s ease;
}

/* ==========================================================================
   10. WinUI 3 Toasts, Tooltips & Empty States
   ========================================================================== */
/* Toast Notification (Windows 11 Notification Banner) */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 10000;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
}

.toast {
  padding: 10px 16px;
  background: rgba(44, 44, 44, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-left: 4px solid var(--win-accent);
  border-radius: var(--win-radius-card);
  box-shadow: var(--win-shadow-dialog);
  color: var(--win-text-primary);
  font-size: 12.5px;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: winToastIn 200ms cubic-bezier(0.1, 0.9, 0.2, 1);
  max-width: 380px;
}

.toast.success {
  border-left-color: var(--win-success);
}

.toast.error {
  border-left-color: var(--win-danger);
}

.toast.info {
  border-left-color: var(--win-accent-light);
}

.toast-icon {
  font-size: 15px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

@keyframes winToastIn {
  from {
    transform: translateY(16px);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* WinUI 3 Tooltip */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 8px;
  background: var(--win-surface-flyout);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--win-radius-control);
  font-size: 11px;
  font-family: var(--win-font-family);
  font-weight: 400;
  color: #ffffff;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--win-transition-fast);
  z-index: 99999;
  box-shadow: var(--win-shadow-tooltip);
}

[data-tooltip]:hover::after {
  opacity: 1;
}

.app-header [data-tooltip]::after,
.sidebar-header [data-tooltip]::after,
.canvas-toolbar [data-tooltip]::after,
.panel-section-header [data-tooltip]::after,
[data-tooltip-pos="bottom"]::after {
  bottom: auto;
  top: calc(100% + 8px);
}

.sidebar-actions [data-tooltip]::after,
.header-actions [data-tooltip]::after,
[data-tooltip-align="right"]::after {
  left: auto;
  right: 0;
  transform: none;
}

/* Empty State */
.no-selection-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 12px;
  color: var(--win-text-tertiary);
  user-select: none;
}

.no-selection-state .state-icon {
  font-size: 42px;
  opacity: 0.4;
}

.no-selection-state p {
  font-size: 13px;
  text-align: center;
  max-width: 280px;
  line-height: 1.6;
}

.hidden-input {
  display: none;
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: winSpin 0.6s linear infinite;
}

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

/* ==========================================================================
   11. Responsive Layout Adaptations
   ========================================================================== */
@media (max-width: 1200px) {
  :root {
    --sidebar-width: 220px;
    --panel-width: 280px;
  }
}

@media (max-width: 900px) {
  :root {
    --sidebar-width: 190px;
    --panel-width: 260px;
  }

  .tab-btn .tab-text {
    display: none;
  }
}