/* ==========================================================================
   True Scale Ruler - Components & Interactive Tools Stylesheet
   ========================================================================== */

/* Ruler Stage & Workspace */
.ruler-workspace {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 380px;
  padding: 50px 20px 40px;
  overflow: visible;
  user-select: none;
  transition: min-height 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.ruler-stage {
  position: relative;
  display: inline-block;
  transform-origin: center center;
  transition: transform 0.05s linear;
  cursor: grab;
  filter: drop-shadow(0 20px 30px rgba(0, 0, 0, 0.45));
}

.ruler-stage.dragging {
  cursor: grabbing;
}

.ruler-stage.is-locked {
  cursor: default;
}

/* Edge snap visual feedback */
.ruler-stage.snapped-left::before,
.ruler-stage.snapped-right::before,
.ruler-stage.snapped-top::before,
.ruler-stage.snapped-bottom::before {
  content: '';
  position: absolute;
  background: #5E6AD2;
  box-shadow: 0 0 0 1px rgba(94, 106, 210, 0.4);
  pointer-events: none;
  z-index: 20;
  border-radius: 2px;
}

.ruler-stage.snapped-left::before {
  left: -2px;
  top: 0;
  bottom: 0;
  width: 4px;
}

.ruler-stage.snapped-right::before {
  right: -2px;
  top: 0;
  bottom: 0;
  width: 4px;
}

.ruler-stage.snapped-top::before {
  top: -2px;
  left: 0;
  right: 0;
  height: 4px;
}

.ruler-stage.snapped-bottom::before {
  bottom: -2px;
  left: 0;
  right: 0;
  height: 4px;
}

.btn-sheet-dock {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  font-weight: 600;
  font-size: 0.82rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-sheet-dock:hover,
.btn-sheet-dock:active {
  background: var(--primary-light);
  border-color: var(--primary);
  color: #93c5fd;
}

.btn-sheet-nudge {
  padding: 6px 14px;
  font-size: 0.82rem;
}

.ruler-drag-bar {
  position: absolute;
  top: -32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 12px;
  background: #161B26;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: grab;
  transition: all 0.15s ease;
  z-index: 25;
  white-space: nowrap;
  pointer-events: auto;
  user-select: none;
}

.ruler-drag-bar:hover {
  background: #1F2430;
  border-color: var(--border-hover);
  color: var(--text-main);
}

.ruler-stage:hover .ruler-drag-bar {
  opacity: 1;
}

.ruler-stage.is-locked .ruler-drag-bar {
  display: none;
}

#rulerCanvas {
  display: block;
  border-radius: 8px;
  cursor: inherit;
}

/* ==========================================================================
   Caliper Overlay & Sliding Jaws
   ========================================================================== */

.caliper-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
}

.caliper-jaw {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 24px;
  margin-left: -12px;
  pointer-events: auto;
  cursor: ew-resize;
  z-index: 15;
}

.jaw-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  left: 11px;
  background: #ef4444;
  pointer-events: none;
}

.jaw-a .jaw-line {
  background: #5E6AD2;
}

.jaw-handle {
  position: absolute;
  width: 32px;
  height: 36px;
  left: -4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #ef4444;
  color: #ffffff;
  border-radius: 6px;
  cursor: ew-resize;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
  touch-action: none;
  user-select: none;
  transition: transform 0.1s ease, top 0.15s ease, bottom 0.15s ease;
  pointer-events: auto;
}

.jaw-handle:hover {
  transform: scale(1.05);
}

.jaw-a .jaw-handle {
  top: -40px;
  background: #5E6AD2;
}

.jaw-b .jaw-handle {
  bottom: -40px;
  background: #ef4444;
}

/* Flipped handles when near screen or bezel edges */
.jaw-a.flip-inside .jaw-handle {
  top: 8px !important;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.7);
}

.jaw-b.flip-inside .jaw-handle {
  bottom: 8px !important;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.7);
}

.jaw-label {
  font-size: 0.75rem;
  font-weight: 800;
  line-height: 1;
}

.jaw-grip {
  width: 12px;
  height: 3px;
  margin-top: 3px;
  border-top: 1px solid rgba(255, 255, 255, 0.6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
}

/* Span Bar between A and B */
.caliper-span {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  height: 28px;
  pointer-events: none;
  z-index: 12;
  display: flex;
  align-items: center;
  justify-content: center;
}

.span-line {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(59, 130, 246, 0.4);
  border-top: 1px dashed #60a5fa;
  pointer-events: none;
}

.span-badge {
  position: relative;
  z-index: 2;
  background: var(--btn-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  cursor: grab;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  white-space: nowrap;
  pointer-events: auto;
  transition: all 0.15s ease;
}

.span-badge:hover {
  background: var(--btn-bg-hover);
  border-color: var(--border-hover);
}

/* Stepper jog buttons in toolbar */
.stepper-group {
  display: flex;
  align-items: center;
  background: var(--btn-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.btn-stepper {
  background: transparent;
  border: none;
  color: var(--text-primary);
  padding: 4px 8px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-stepper:hover {
  background: var(--btn-bg-hover);
}

/* 2D Box Compact Stepper Badge */
.box-stepper-compact-group {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: nowrap;
}

.box-stepper-badge {
  display: inline-flex;
  align-items: center;
  height: 36px;
  background: var(--btn-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0 2px;
}

.box-stepper-val {
  font-family: var(--font-mono) !important;
  font-variant-numeric: tabular-nums !important;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 0 8px;
  min-width: 60px;
  text-align: center;
}

.box-stepper-input-wrap {
  display: inline-flex;
  align-items: center;
  padding: 0 2px;
}

.box-stepper-input {
  width: 54px;
  height: 28px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono) !important;
  font-variant-numeric: tabular-nums !important;
  font-size: 0.85rem;
  font-weight: 600;
  text-align: right;
  padding: 2px 4px;
  outline: none;
  -moz-appearance: textfield;
  transition: all 0.15s ease;
}

.box-stepper-input::-webkit-outer-spin-button,
.box-stepper-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.box-stepper-input:focus {
  background: rgba(94, 106, 210, 0.14);
  border-color: #5E6AD2;
  box-shadow: 0 0 0 2px rgba(94, 106, 210, 0.25);
}

.box-stepper-unit {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-left: 3px;
  margin-right: 4px;
  user-select: none;
}

/* ==========================================================================
   Protractor Stage
   ========================================================================== */

.protractor-stage {
  position: relative;
  z-index: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

#protractorCanvas {
  display: block;
  margin: 0 auto;
  cursor: crosshair;
  filter: drop-shadow(0 15px 35px rgba(0, 0, 0, 0.5));
  max-width: 100%;
  touch-action: none;
}

.protractor-presets {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-protractor-snap,
.btn-protractor-preset,
.btn-mobile-snap-angle,
.btn-view-mode-toggle {
  background: var(--bg-surface-elevated, #161B26);
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  color: var(--text-main, #ECEEEF);
  padding: 6px 12px;
  border-radius: var(--radius-sm, 6px);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.btn-protractor-snap:hover,
.btn-protractor-preset:hover,
.btn-mobile-snap-angle:hover,
.btn-view-mode-toggle:hover {
  background: #1F2430;
  border-color: var(--border-hover, rgba(255, 255, 255, 0.20));
  color: #ffffff;
}

.btn-protractor-snap.active,
.btn-protractor-preset.active,
.btn-mobile-snap-angle.active,
.btn-view-mode-toggle.active {
  background: var(--primary, #5E6AD2) !important;
  border-color: rgba(255, 255, 255, 0.4) !important;
  color: #ffffff !important;
  font-weight: 700 !important;
  box-shadow: 0 0 10px rgba(94, 106, 210, 0.4) !important;
}

.val-snap {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-weight: 700;
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
  transition: color 0.15s ease;
}

.val-snap.active {
  color: #10B981 !important; /* Precision Emerald */
}

.val-snap.off {
  color: var(--text-muted, #8A8F98) !important;
}

/* ==========================================================================
   Ring Sizer Stage & Reference Chart
   ========================================================================== */

.ring-stage {
  position: relative;
  z-index: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 30px 20px;
}

#ringCanvas {
  cursor: ew-resize;
  filter: drop-shadow(0 10px 25px rgba(0, 0, 0, 0.4));
}

.ring-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
  width: 100%;
  max-width: 450px;
}

.ring-size-table-container {
  max-width: 800px;
  width: 100%;
  margin: 30px auto 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  overflow-x: auto;
}

.ring-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  text-align: center;
}

.ring-table th {
  background: var(--bg-surface-elevated);
  color: var(--text-main);
  padding: 8px 10px;
  font-weight: 600;
  border-bottom: 2px solid var(--border-subtle);
}

.ring-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

.ring-table tr:hover td {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-main);
}

/* ==========================================================================
   2D Box Measure Stage
   ========================================================================== */

.box-stage {
  position: relative;
  z-index: 1;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 420px;
  padding: 40px 20px;
}

.box-measure-overlay {
  position: relative;
}

.box-rect {
  position: relative;
  min-width: 50px;
  min-height: 50px;
  background: rgba(94, 106, 210, 0.08);
  border: 1px dashed rgba(94, 106, 210, 0.6);
  border-radius: 8px;
  box-shadow: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.box-handle {
  position: absolute;
  background: #5E6AD2;
  border: 1.5px solid #ffffff;
  border-radius: 50%;
  z-index: 20;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.handle-r {
  right: -8px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  cursor: ew-resize;
}

.handle-b {
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  cursor: ns-resize;
}

.handle-br {
  right: -9px;
  bottom: -9px;
  width: 18px;
  height: 18px;
  cursor: nwse-resize;
  background: #10B981;
}

.box-info-badge {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  color: var(--text-primary);
  pointer-events: none;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.box-badge-size {
  font-weight: 700;
  color: var(--text-primary);
}

.box-badge-area {
  display: block;
  font-size: 0.75rem;
  color: var(--primary);
  font-weight: 600;
  margin-top: 2px;
}

.box-badge-sub {
  display: block;
  font-size: 0.70rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ==========================================================================
   Unit Converter View
   ========================================================================== */

.converter-view {
  max-width: 800px;
  margin: 24px auto;
  padding: 0 16px;
  width: 100%;
  box-sizing: border-box;
}

.converter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  width: 100%;
  box-sizing: border-box;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.conv-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  box-sizing: border-box;
}

.conv-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
}

.conv-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  box-sizing: border-box;
}

.conv-input {
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-main);
  padding: 10px 45px 10px 14px;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.conv-input:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 1px;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.conv-unit-tag {
  position: absolute;
  right: 12px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-dim);
}

/* ==========================================================================
   Calibration Modal & Graphic Cards
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
  align-items: center;
  justify-content: center;
  z-index: 100005 !important;
  opacity: 0;
  transition: opacity 0.25s ease;
  padding: 20px;
}

body.modal-open {
  overflow: hidden !important;
}

.credit-card-visual-wrapper {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 4px 0;
  scrollbar-width: none;
}

.credit-card-visual-wrapper::-webkit-scrollbar {
  display: none;
}

.modal-backdrop.open {
  display: flex !important;
  visibility: visible !important;
  pointer-events: auto !important;
  opacity: 1 !important;
}

.modal-backdrop:not(.open) * {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

.modal-card {
  width: 100%;
  max-width: 650px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 90vh;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 22px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.15s ease;
}

.modal-close:hover {
  color: var(--text-primary);
}

.cal-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background: var(--btn-bg);
  overflow-x: auto;
}

.cal-tab-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex: 1;
  padding: 10px 14px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.cal-tab-btn .tab-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: inherit;
}

.cal-tab-btn:hover {
  color: var(--text-primary);
  background: var(--btn-bg-hover);
}

.cal-tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  background: var(--primary-light);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
}

.cal-tab-panel {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.cal-tab-panel.active {
  display: flex;
}

.cal-instructions {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
  max-width: 520px;
}

/* Realistic Credit Card Graphic */
.credit-card-visual {
  position: relative;
  width: 320px;
  height: 202px; /* 1.5858 ratio */
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  user-select: none;
  transition: width 0.05s ease, height 0.05s ease;
}

.credit-card-visual::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.25) 0%, transparent 50%);
  pointer-events: none;
}

.card-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-chip {
  width: 38px;
  height: 28px;
  background: linear-gradient(135deg, #fcd34d 0%, #f59e0b 100%);
  border-radius: 5px;
  border: 1px solid #d97706;
  position: relative;
}

.card-chip::after {
  content: '';
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 4px;
  right: 4px;
  border: 1px solid rgba(0, 0, 0, 0.25);
}

.card-network-logo {
  font-size: 0.85rem;
  font-weight: 800;
  font-style: italic;
  letter-spacing: 1px;
  color: #94a3b8;
}

.card-center-text {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 2px;
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
}

.card-bottom-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 600;
  text-transform: uppercase;
}

.cal-slider-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.cal-stepper-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 22px;
  border-top: 1px solid var(--border-color);
  background: var(--card-bg);
}

.modal-card .btn-action-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--btn-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: none !important;
  transition: all 0.15s ease;
}

.modal-card .btn-action-primary:hover {
  background: var(--btn-bg-hover);
  border-color: var(--border-hover);
  box-shadow: none !important;
  color: var(--text-primary);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--btn-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-secondary:hover {
  color: var(--text-primary);
  background: var(--btn-bg-hover);
  border-color: var(--border-hover);
}

.btn-danger-ghost {
  background: transparent;
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: var(--accent-red);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.80rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-danger-ghost:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.45);
}

.btn-danger-ghost:hover {
  text-decoration: underline;
}

#calibration-object-preview,
#currencyPreviewBox,
.currency-preview-box,
.object-outline-box {
  width: 250px;
  height: 100px;
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm, 6px);
  transition: all 0.15s ease;
}

/* ==========================================================================
   Light Mode Component Overrides
   ========================================================================== */

[data-theme="light"] .ruler-stage {
  filter: drop-shadow(0 18px 30px rgba(15, 23, 42, 0.18)) drop-shadow(0 2px 6px rgba(15, 23, 42, 0.08));
}

[data-theme="light"] .ruler-drag-bar {
  background: #FFFFFF !important;
  color: #334155 !important;
  border: 1px solid rgba(0, 0, 0, 0.14) !important;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06) !important;
}

[data-theme="light"] .ruler-drag-bar:hover {
  background: #F8FAFC !important;
  color: #0F172A !important;
  border-color: rgba(0, 0, 0, 0.25) !important;
}

[data-theme="light"] .btn-view-mode-toggle {
  background: #F1F5F9 !important;
  border: 1px solid rgba(0, 0, 0, 0.12) !important;
  color: #0F172A !important;
}

[data-theme="light"] .btn-view-mode-toggle.active {
  background: var(--primary) !important;
  color: #FFFFFF !important;
}

[data-theme="light"] .span-badge {
  background: #ffffff;
  border-color: #2563eb;
  color: #0f172a;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .span-badge:hover {
  background: #f8fafc;
  border-color: #1d4ed8;
}

[data-theme="light"] .modal-title {
  color: var(--text-main);
}

[data-theme="light"] .modal-close:hover {
  color: var(--text-main);
}

[data-theme="light"] .cal-tabs {
  background: rgba(241, 245, 249, 0.85);
}

[data-theme="light"] .modal-footer {
  background: rgba(241, 245, 249, 0.85);
}

[data-theme="light"] .btn-secondary:hover {
  background: rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .box-stepper-badge {
  background: #f1f5f9;
  border-color: rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .box-stepper-val {
  color: #0f172a;
}

[data-theme="light"] .box-stepper-input {
  color: #0f172a;
}

[data-theme="light"] .box-stepper-input:focus {
  background: #ffffff;
  border-color: #5E6AD2;
  box-shadow: 0 0 0 2px rgba(94, 106, 210, 0.25);
}

[data-theme="light"] .box-stepper-unit {
  color: #475569;
}

[data-theme="light"] #calibration-object-preview,
[data-theme="light"] #currencyPreviewBox,
[data-theme="light"] .currency-preview-box,
[data-theme="light"] .object-outline-box {
  background: #F1F5F9;
  background: rgba(94, 106, 210, 0.08);
  color: #0F172A;
  border: 2px solid #5E6AD2;
}

[data-theme="light"] .stepper-group {
  background: #f1f5f9;
  border-color: rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .btn-stepper {
  color: #0f172a;
}

[data-theme="light"] .btn-stepper:hover {
  background: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .box-info-badge {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .ring-size-table-container h3 {
  color: var(--text-main);
}

[data-theme="light"] .ring-table tr:hover td {
  background: rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .ring-size-table-container {
  box-shadow: var(--shadow-sm);
}

[data-theme="light"] .converter-grid {
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Mobile & Touch Enhancements
   ========================================================================== */

/* Larger touch targets for mobile */
@media (hover: none) and (pointer: coarse) {
  /* Protractor - larger handle */
  .protractor-stage canvas {
    touch-action: none;
  }

  /* Ring Sizer - larger drag handle */
  .ring-stage canvas {
    touch-action: none;
  }

  /* Box Measure - larger handles */
  .box-handle {
    width: 24px;
    height: 24px;
  }
  .handle-br {
    width: 28px;
    height: 28px;
  }

  /* Make all interactive elements larger on touch */
  .btn-protractor-preset {
    padding: 10px 18px;
    font-size: 0.9rem;
    min-height: 44px;
  }

  .btn-ring-step {
    padding: 10px 16px;
    font-size: 0.85rem;
    min-height: 44px;
  }

  .ring-stepper-segmented .btn-ring-step {
    padding: 0 10px;
    font-size: 0.78rem;
    min-height: 36px;
    height: 36px;
    max-height: 36px;
  }

  .btn-box-step {
    padding: 10px 16px;
    font-size: 0.85rem;
    min-height: 44px;
  }

  .sheet-select,
  .mobile-bottom-sheet select {
    min-height: 42px;
    height: 42px;
    padding: 0 34px 0 12px;
    font-size: 0.90rem !important;
    font-family: 'Inter', system-ui, -apple-system, sans-serif !important;
  }

  .conv-input {
    min-height: 44px;
    padding: 12px 45px 12px 14px;
    font-size: 1rem;
  }

  .range-slider {
    height: 8px;
  }

  .range-slider::-webkit-slider-thumb {
    width: 24px;
    height: 24px;
  }

  .cal-stepper-row .btn-secondary {
    padding: 10px 14px;
    min-height: 44px;
  }
}

/* Hide UI mode adjustments for tools */
body.hide-ui .protractor-stage {
  height: 100%;
  max-height: calc(100vh - 40px);
}

body.hide-ui .ring-stage {
  height: 100%;
  max-height: calc(100vh - 40px);
}

body.hide-ui .box-stage {
  height: 100%;
  max-height: calc(100vh - 40px);
}

/* Ensure canvases don't overflow in hide-ui mode */
body.hide-ui #protractorCanvas,
body.hide-ui #ringCanvas {
  max-width: 100%;
  max-height: calc(100vh - 40px);
  height: auto;
}

/* Landscape mobile optimizations */
@media (max-height: 500px) and (orientation: landscape) {
  .protractor-stage,
  .ring-stage,
  .box-stage {
    padding: 10px;
  }

  .protractor-stage canvas,
  .ring-stage canvas {
    max-height: 80vh;
  }
}

/* Improved focus styles for accessibility */
.btn-pill:focus-visible,
.btn-icon:focus-visible,
.tool-nav-btn:focus-visible,
.form-select:focus-visible,
.btn-stepper:focus-visible,
.btn-protractor-preset:focus-visible,
.btn-ring-step:focus-visible,
.btn-box-step:focus-visible,
.conv-input:focus-visible,
.range-slider:focus-visible,
.btn-action-primary:focus-visible,
.btn-secondary:focus-visible,
.modal-close:focus-visible,
.cal-tab-btn:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-subtle: currentColor;
    --border-hover: currentColor;
  }
  .readout-card {
    border-width: 2px;
  }
  .caliper-jaw .jaw-line {
    width: 3px;
  }
}

/* Responsive Calibration Modal for Mobile (Galaxy, iPhone, Small Screens) */
@media (max-width: 768px) {
  .modal-backdrop {
    padding: 8px !important;
    align-items: center !important;
    justify-content: center !important;
  }

  .modal-card {
    max-width: 100% !important;
    max-height: 94vh !important;
    border-radius: 12px !important;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.85) !important;
  }

  .modal-header {
    padding: 10px 14px !important;
  }

  .modal-title {
    font-size: 0.94rem !important;
    font-weight: 700 !important;
  }

  .modal-close {
    font-size: 1.4rem !important;
    padding: 0 4px !important;
    line-height: 1 !important;
  }

  .cal-tabs {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
    background: #12161F !important;
    padding: 4px 6px !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
  }

  [data-theme="light"] .cal-tabs {
    background: #F1F5F9 !important;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08) !important;
  }

  .cal-tabs::-webkit-scrollbar {
    display: none !important;
  }

  .cal-tab-btn {
    flex: 0 0 auto !important;
    padding: 8px 12px !important;
    font-size: 0.76rem !important;
    gap: 6px !important;
    border-radius: 6px !important;
    transition: all 0.15s ease !important;
    color: #8A8F98 !important;
  }

  .cal-tab-btn .tab-icon {
    stroke: currentColor !important;
  }

  [data-theme="light"] .cal-tab-btn:not(.active) {
    color: #475569 !important;
    background: transparent !important;
  }

  [data-theme="light"] .cal-tab-btn:not(.active) .tab-icon {
    stroke: #475569 !important;
  }

  [data-theme="light"] .cal-tab-btn:not(.active):hover {
    color: #0F172A !important;
    background: rgba(0, 0, 0, 0.05) !important;
  }

  .cal-tab-btn.active {
    background: #5E6AD2 !important;
    color: #FFFFFF !important;
  }

  .cal-tab-btn.active .tab-icon {
    stroke: #FFFFFF !important;
  }

  [data-theme="light"] .cal-tab-btn.active {
    background: #2563EB !important;
    color: #FFFFFF !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12) !important;
  }

  [data-theme="light"] .cal-tab-btn.active .tab-icon {
    stroke: #FFFFFF !important;
  }

  .modal-body {
    padding: 12px 14px 16px !important;
    max-height: calc(94vh - 110px) !important;
    overflow-y: auto !important;
    overscroll-behavior: contain !important;
  }

  .cal-tab-panel {
    gap: 10px !important;
  }

  .cal-instructions {
    font-size: 0.78rem !important;
    line-height: 1.35 !important;
    margin-bottom: 2px !important;
    color: #8A8F98 !important;
  }

  .credit-card-visual {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5) !important;
    padding: 12px !important;
  }

  .card-chip {
    width: 32px !important;
    height: 24px !important;
  }

  .card-network-logo {
    font-size: 0.75rem !important;
  }

  .card-center-text {
    font-size: 0.82rem !important;
    letter-spacing: 1.5px !important;
  }

  .card-bottom-row {
    font-size: 0.65rem !important;
  }

  .cal-slider-container {
    gap: 6px !important;
    width: 100% !important;
  }

  .cal-stepper-row {
    width: 100% !important;
    max-width: 340px !important;
    gap: 6px !important;
    display: flex !important;
    justify-content: center !important;
  }

  .cal-stepper-row .btn-card-step {
    flex: 1 !important;
    padding: 6px 2px !important;
    font-size: 0.78rem !important;
    height: 32px !important;
  }

  .modal-card .btn-action-primary {
    width: 100% !important;
    max-width: 340px !important;
    height: 38px !important;
    justify-content: center !important;
    font-size: 0.82rem !important;
  }

  .modal-footer {
    padding: 10px 14px !important;
    gap: 8px !important;
  }

  .modal-footer .btn-danger-ghost,
  .modal-footer .btn-secondary {
    padding: 6px 12px !important;
    font-size: 0.78rem !important;
    height: 32px !important;
  }
}

/* ==========================================================================
   Keyboard Shortcuts Modal & <kbd> Elements
   ========================================================================== */
.shortcuts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 16px;
}

.shortcuts-category {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.shortcuts-category-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 6px;
  margin-bottom: 4px;
}

.shortcut-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.88rem;
  color: var(--text-primary);
}

.shortcut-desc {
  color: var(--text-secondary);
}

.shortcut-keys {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.shortcut-key,
kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 6px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1;
  color: var(--text-primary);
  background: var(--bg-surface-elevated, #161b26);
  border: 1px solid var(--border-color);
  border-bottom: 2px solid rgba(255, 255, 255, 0.22);
  border-radius: 5px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  user-select: none;
}

[data-theme="light"] .shortcut-key,
[data-theme="light"] kbd {
  background: #f1f5f9;
  border-color: #cbd5e1;
  border-bottom: 2px solid #94a3b8;
  color: #0f172a;
}

.footer-link-btn {
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 400;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-block;
  text-align: left;
  line-height: inherit;
  transition: color 0.15s ease;
}

.footer-link-btn:hover {
  color: var(--text-primary);
  text-decoration: underline;
}