/* QUANTUM LABS — Circuit Builder Page */

.circuit-board {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  min-width: 100%;
  min-height: 100%;
  padding: var(--sp-6);
}

/* Qubit Row */
.qubit-row {
  position: relative;
  display: flex;
  align-items: center;
  height: 48px;
}

/* Qubit Label */
.qubit-label {
  width: 50px;
  padding-right: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ash);
  text-align: right;
  user-select: none;
  flex-shrink: 0;
}

/* Qubit Wire */
.qubit-wire {
  position: relative;
  display: flex;
  flex: 1;
  align-items: center;
  height: 100%;
}

/* The wire line */
.qubit-wire::before {
  position: absolute;
  top: 50%;
  right: 0;
  left: 0;
  z-index: var(--z-base);
  height: 1px;
  background: var(--wire-light);
  transform: translateY(-50%);
  content: '';
}

/* Cbit Wire */
.cbit-wire::before {
  position: absolute;
  top: 50%;
  right: 0;
  left: 0;
  z-index: var(--z-base);
  height: 3px;
  background: transparent;
  transform: translateY(-50%);
  content: '';
  border-top: 1px solid var(--wire-light);
  border-bottom: 1px solid var(--wire-light);
}

/* Gate Slots Container */
.gate-slots {
  position: relative;
  z-index: var(--z-elevated);
  display: flex;
  align-items: center;
  gap: 8px;
  height: 100%;
  padding: 0 8px;
  transition: background var(--duration-fast);
}

/* Gate Slot */
.gate-slot.step-active {
  background: var(--ember-08);
  border: 1px solid var(--ember-40);
  border-radius: var(--radius-sm);
  box-shadow: inset 0 0 10px var(--ember-20);
}

/* Gate Slot (Drop Zone) */
.gate-slot {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px dashed transparent;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
}

/* Gate Slot */
.gate-slot.empty {
  border-color: transparent;
}

/* Show empty slots when dragging a gate or when a gate is selected in palette */
.gate-slot.drop-ready,
.editor-placing .gate-slot.empty {
  border-color: var(--wire-light);
  background: var(--white-02);
}

/* Gate Slot */
.gate-slot.drop-hover,
.gate-slot.empty.drop-hover {
  background: var(--ember-08);
  box-shadow: var(--glow-ember);
  border-color: var(--ember);
}
.gate-slot.empty:hover,
.editor-placing .gate-slot.empty:hover {
  background: var(--ember-08);
  box-shadow: var(--glow-ember);
  border-color: var(--ember);
}

/* Highlight for pending multi-qubit gate placement (e.g., waiting for target qubit) */
.gate-slot.editor-pending,
.editor-placing .gate-slot.empty.editor-pending {
  border-color: var(--flame);
  box-shadow: 0 0 12px var(--flame-20);
  background: var(--flame-10);
  animation: pulsePending 1.5s infinite;
}

@keyframes pulsePending {
  0% { box-shadow: 0 0 0 0 var(--flame-40); }
  70% { box-shadow: 0 0 0 10px rgba(0, 0, 0, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 0, 0, 0); }
}

/* Placed Gate */
.placed-gate {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-family: var(--font-mono);
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--graphite);
  background: var(--bone);
  border: 1px solid var(--graphite);
  border-radius: 0;
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
  user-select: none;
}
.placed-gate:hover {
  background: var(--ember-15);
  transform: scale(1.05);
  border-color: var(--ember);
}
.placed-gate.multi-gate,
.placed-gate.multi-gate:hover,
.placed-gate.multi-gate.selected {
  color: var(--bone);
  background: transparent;
  border-color: transparent;
}
.placed-gate.selected {
  color: var(--on-accent);
  background: var(--ember);
  transform: scale(1.05);
  border-color: var(--flame);
}

/* Param badge on parametric gates */
.placed-gate .param-badge {
  position: absolute;
  bottom: -4px;
  left: 50%;
  z-index: 2;
  width: -webkit-max-content;
  width: -moz-max-content;
  width: max-content;
  min-width: 50px;
  padding: 2px 5px;
  font-size: 8px !important;
  line-height: 1;
  color: var(--chalk);
  text-align: center;
  background: var(--carbon);
  border: 1px solid var(--wire-light);
  border-radius: 4px;
  box-shadow: var(--shadow-sm);
  transform: translateX(-50%);
  white-space: nowrap !important;
}

/* Edit Parameter Button */
.edit-param-btn {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 20px;
  height: 20px;
  background: var(--carbon);
  border: 1px solid var(--wire-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--chalk);
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.2s var(--ease-out);
  z-index: 5;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

/* Edit Param Btn */
.edit-param-btn svg {
  width: 12px;
  height: 12px;
}

/* Placed Gate */
.placed-gate:hover .edit-param-btn,
.placed-gate.selected .edit-param-btn {
  opacity: 1;
  transform: scale(1);
}

/* Edit Param Btn */
.edit-param-btn:hover {
  background: var(--ember);
  color: var(--on-accent);
  border-color: var(--ember);
}

/* Placed Gate */
.placed-gate .param-badge .katex,
.placed-gate .param-badge .katex-html {
  display: inline-block !important;
  font-size: 1em !important;
  white-space: nowrap !important;
}
.placed-gate .katex {
  pointer-events: none;
}

/* Multi-qubit gate connector lines */
.gate-connector {
  position: absolute;
  left: 50%;
  z-index: var(--z-base);
  width: 1px;
  background: var(--wire-light);
  transform: translateX(-50%);
  pointer-events: none;
}

/* Control dot for CNOT etc. */
.control-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: var(--z-top);
  width: 12px;
  height: 12px;
  background: var(--bone);
  border: none;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

/* Target symbol for CNOT */
.target-symbol {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 24px;
  height: 24px;
  border: 1px solid var(--bone);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

/* Target Symbol */
.target-symbol::before,
.target-symbol::after {
  position: absolute;
  background: var(--bone);
  content: '';
}
.target-symbol::before {
  top: 0;
  left: 50%;
  width: 1px;
  height: 100%;
  transform: translateX(-50%);
}
.target-symbol::after {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  transform: translateY(-50%);
}

/* Swap symbol for SWAP / CSWAP */
.swap-symbol {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 14px;
  transform: translate(-50%, -50%);
}

/* Swap Symbol */
.swap-symbol::before,
.swap-symbol::after {
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  background: var(--bone);
  content: '';
}
.swap-symbol::before {
  transform: translateX(-50%) rotate(45deg);
}
.swap-symbol::after {
  transform: translateX(-50%) rotate(-45deg);
}

/* Selected state for multi-qubit elements */
.gate-connector.selected {
  background: var(--flame);
}

/* Gate Connector */
.gate-connector.classical {
  width: 4px;
  background: transparent;
  transform: translateX(-1.5px);
  border-left: 1px solid var(--wire-light);
  border-right: 1px solid var(--wire-light);
}
.gate-connector.classical.selected {
  border-color: var(--flame);
}

/* Placed Gate */
.placed-gate.selected .control-dot {
  background: var(--flame);
}
.placed-gate.selected .target-symbol {
  border-color: var(--flame);
}
.placed-gate.selected .target-symbol::before,
.placed-gate.selected .target-symbol::after,
.placed-gate.selected .swap-symbol::before,
.placed-gate.selected .swap-symbol::after {
  background: var(--flame);
}

/* New gate symbol types (c-X, c-Z, M multi, CP target) */

/* Classical control dot — appears on the cbit wire for c-X and c-Z */
.classical-control-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: var(--z-top);
  width: 10px;
  height: 10px;
  background: var(--smoke);
  border: 2px solid var(--ash);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

/* Measurement cbit landing indicator — dashed circle on the classical wire */
.cbit-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 12px;
  border: 2px dashed var(--ember);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

/* Generic text box target (e.g. CP phase box, CY gate) */
.placed-gate.multi-gate.box-target {
  color: var(--graphite) !important;
  background: var(--bone);
  border: 1px solid var(--graphite);
}

/* Placed Gate */
.placed-gate.multi-gate.box-target:hover {
  background: var(--ember-15);
  border-color: var(--ember);
}

/* Box Label */
.box-label {
  font-family: var(--font-mono);
  font-size: var(--text-md);
  font-weight: 700;
  color: inherit;
  font-style: normal;
}

/* c-Z quantum target — styled box with Z label */
.placed-gate.multi-gate.cz-target {
  font-size: 13px;
  font-weight: 700;
  color: var(--bone);
  background: var(--graphite);
  border: 1px solid var(--wire-light);
}

/* Placed Gate */
.placed-gate.multi-gate.cz-target:hover {
  background: var(--steel);
  border-color: var(--ember);
}
.placed-gate.multi-gate.box-target.selected,
.placed-gate.multi-gate.cz-target.selected {
  color: var(--on-accent) !important;
  background: var(--ember);
  border-color: var(--flame);
}

/* M cbit slot — keep fully transparent, only the indicator dot is visible */
.placed-gate.cbit-result-slot {
  background: transparent;
  border-color: transparent;
}

/* Classical control dot selected state */
.placed-gate.selected .classical-control-dot {
  background: var(--flame);
  border-color: var(--flame);
}

/* Cbit indicator selected state */
.placed-gate.selected .cbit-indicator {
  border-color: var(--flame);
}

/* Add Step Button */
.add-step-zone {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-size: var(--text-lg);
  color: var(--wire-light);
  border: 1px dashed var(--wire);
  border-radius: var(--radius-sm);
  opacity: 0;
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
  pointer-events: none;
  flex-shrink: 0;
  visibility: hidden;
}

/* Add Step Zone */
.add-step-zone.drop-ready,
.editor-placing .add-step-zone {
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
}
.add-step-zone:hover {
  color: var(--ember);
  background: var(--ember-05);
  border-color: var(--ember);
}
.add-step-zone.drop-hover {
  color: var(--flame);
  background: var(--ember-10);
  box-shadow: var(--glow-ember);
  border-color: var(--ember);
}

/* Drag Ghost & Pending */
.drag-ghost {
  position: fixed;
  z-index: var(--z-max);
  opacity: 0.9;
  transform: scale(1.1);
  pointer-events: none;
}

/* Drag Ghost */
.drag-ghost .placed-gate {
  border-color: var(--flame);
}

/* Placed Gate */
.placed-gate.pending {
  font-size: 10px;
  background: var(--ember-10);
  border: 1px dashed var(--ember);
  opacity: 0.6;
  pointer-events: none;
  animation: pendingPulse 1.5s infinite ease-in-out;
}

@keyframes pendingPulse {
  0% {
    opacity: 0.5;
    transform: scale(0.95);
  }

  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }

  100% {
    opacity: 0.5;
    transform: scale(0.95);
  }
}

/* Circuit Builder — UI Components */


/* Qubit Counter */
.qubit-counter {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--ash);
}
.qubit-counter span {
  min-width: 24px;
  text-align: center;
}

/* Qubit Count Value */
.qubit-count-value {
  font-weight: 600;
  color: var(--bone);
}

/* Sidebar */

.setup-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-2);
  font-size: var(--text-sm);
  color: var(--bone);
}

/* Setup Row */
.setup-row:last-child {
  margin-bottom: 0;
}

/* Shots Slider Layout */
.setup-shots-container {
  margin-top: var(--sp-2);
}

/* Setup Slider Row */
.setup-slider-row {
  display: grid;
  align-items: center;
  gap: var(--sp-3);
  grid-template-columns: 40px 1fr 80px;
  width: 100%;
}

/* Setup Slider Input */
.setup-slider-input {
  width: 100%;
  text-align: center;
}

/* Results Panel */
.results-header {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--wire);
  flex-shrink: 0;
}

/* Results Tab */
.results-tab {
  flex: 1;
  padding: var(--sp-3) var(--sp-2);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--smoke);
  text-align: center;
  background: none;
  border: none;
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
  letter-spacing: 0.04em;
  border-bottom: 2px solid transparent;
}
.results-tab:hover {
  color: var(--chalk);
  background: var(--white-02);
}
.results-tab.active {
  color: var(--ember);
  border-bottom-color: var(--ember);
}

/* Running indicator — subtle shimmer on the header while simulation is in progress */
.results-panel--running .results-header {
  position: relative;
  overflow: hidden;
}

/* Results Panel  Running */
.results-panel--running .results-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--white-02) 40%,
    var(--ember-dim, rgba(196, 75, 43, 0.12)) 50%,
    var(--white-02) 60%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: results-shimmer 1.4s ease-in-out infinite;
  pointer-events: none;
}

@keyframes results-shimmer {
  0% { background-position: 200% center; }
  100% { background-position: -200% center; }
}

/* Results Filter */
.results-filter-container {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  background: var(--carbon);
  border-bottom: 1px solid var(--wire);
  flex-shrink: 0;
  overflow-x: auto;
}

/* Filter Chip */
.filter-chip {
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--smoke);
  background: var(--graphite);
  border: 1px solid var(--wire);
  border-radius: 12px;
  transition: all var(--duration-fast);
  cursor: pointer;
}
.filter-chip:hover {
  color: var(--chalk);
  background: var(--wire);
}
.filter-chip.active {
  color: var(--ember);
  background: var(--ember-15);
  border-color: var(--ember);
}

/* Results Body */
.results-body {
  flex: 1;
  padding: var(--sp-3);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

/* Tab Pane */
.tab-pane {
  display: none;
}
.tab-pane.active {
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* State Vector Table */
.statevector-table {
  width: 100%;
  flex: 1;
  display: flex;
  flex-direction: column;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

/* Sv Row */
.sv-row {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-1) var(--sp-2);
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast);
}
.sv-row:hover {
  background: var(--white-03);
}

/* Sv Index */
.sv-index {
  min-width: 24px;
  margin-right: var(--sp-1);
  font-size: 0.9em;
  color: var(--smoke);
  text-align: right;
}

/* Sv Basis */
.sv-basis {
  min-width: 50px;
  font-weight: 600;
  color: var(--ember);
}

/* Sv Amplitude */
.sv-amplitude {
  flex: 1;
  color: var(--chalk);
  text-align: right;
}

/* Sv Prob */
.sv-prob {
  min-width: 50px;
  color: var(--ash);
  text-align: right;
}

/* Sv Bar Container */
.sv-bar-container {
  flex: 1;
  height: 4px;
  background: var(--wire);
  border-radius: 2px;
  overflow: hidden;
}

/* Sv Bar */
.sv-bar {
  height: 100%;
  background: var(--ember);
  border-radius: 2px;
  transition: width var(--duration-slow) var(--ease-out);
}

/* Probability Chart */
.prob-chart {
  width: 100%;
  height: 100%;
  min-height: 200px;
}

/* Bloch Sphere Container */
.bloch-container {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
}

/* Bloch Container */
.bloch-container canvas {
  width: 100%;
  height: 100%;
}

/* Bloch Info */
.bloch-info {
  padding: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--ash);
}
.bloch-info .coord-row {
  display: flex;
  justify-content: space-between;
  padding: var(--sp-1) 0;
}
.bloch-info .coord-label {
  color: var(--smoke);
}
.bloch-info .coord-value {
  color: var(--bone);
}

/* Param Input Popover */
.param-popover {
  position: fixed;
  z-index: var(--z-popover);
  display: none;
  padding: var(--sp-3);
  background: var(--graphite);
  border: 1px solid var(--ember);
  border-radius: var(--radius-md);
  box-shadow: var(--glow-ember), var(--shadow-lg);
}

/* Param Popover */
.param-popover.show {
  display: block;
}

/* Param Header */
.param-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-2);
}
.param-header label {
  font-size: var(--text-xs);
  color: var(--ash);
}

/* Param Toggle */
.param-toggle {
  display: flex;
  padding: 2px;
  background: var(--carbon);
  border-radius: var(--radius-sm);
}

/* Param Toggle Btn */
.param-toggle-btn, .u1-toggle-btn {
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--smoke);
  background: transparent;
  border: none;
  border-radius: 2px;
  cursor: pointer;
}
.param-toggle-btn.active, .u1-toggle-btn.active {
  color: var(--ember);
  background: var(--graphite);
}

/* Param Popover */
.param-popover input[type="text"] {
  width: 120px;
  padding: var(--sp-1) var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--bone);
  background: var(--carbon);
  border: 1px solid var(--wire);
  border-radius: var(--radius-sm);
  outline: none;
}
.param-popover input[type="text"]:focus {
  border-color: var(--ember);
}

/* Param Slider Wrap */
.param-slider-wrap {
  margin-top: 4px;
  margin-bottom: var(--sp-1);
}

/* Param Popover */
.param-popover input[type="range"] {
  width: 100%;
  height: 4px;
  background: var(--carbon);
  border-radius: 2px;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
}
.param-popover input[type="range"]::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  background: var(--ember);
  border: 2px solid var(--carbon);
  border-radius: 50%;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}
.param-popover input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--ember);
  border: 2px solid var(--carbon);
  border-radius: 50%;
  cursor: pointer;
}
.param-popover .param-actions {
  display: flex;
  gap: var(--sp-1);
  margin-top: var(--sp-2);
}
.param-popover .param-actions .btn {
  flex: 1;
}

/* U1 Gate Popover (3-angle) */
.u1-popover {
  width: 230px;
}

/* U1 Popover */
.u1-popover input[type="text"] {
  width: 100%;
  box-sizing: border-box;
}

/* U1 Gate Popover — angle section labels (θ, φ, λ) */
.u1-angle-section {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--ash);
  margin-top: var(--sp-2);
  margin-bottom: 4px;
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: var(--sp-8);
  color: var(--smoke);
  text-align: center;
}

/* U2 Name Input (Matches U1 Popover) */
.u2-name-input {
  width: 100%;
  box-sizing: border-box;
  padding: var(--sp-1) var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--bone);
  background: var(--carbon);
  border: 1px solid var(--wire);
  border-radius: var(--radius-sm);
  outline: none;
}

/* U2 Name Input */
.u2-name-input:focus {
  border-color: var(--ember);
}

/* Empty State */
.empty-state svg {
  width: 48px;
  height: 48px;
  stroke: var(--wire-light);
}

/* Shots Range Slider */
.cb-slider {
  width: 100%;
  height: 4px;
  background: var(--wire);
  border-radius: 2px;
  transition: background var(--duration-fast);
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
}

/* Cb Slider */
.cb-slider::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  background: var(--ember);
  border: 2px solid var(--carbon);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-fast);
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}
.cb-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}
.cb-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--ember);
  border: 2px solid var(--carbon);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-fast);
  cursor: pointer;
}
.cb-slider::-moz-range-thumb:hover {
  transform: scale(1.2);
}

/* Empty State */
.empty-state p {
  max-width: 200px;
  font-size: var(--text-sm);
  line-height: 1.5;
}

/* Context Menu */
.context-menu {
  position: fixed;
  z-index: var(--z-dropdown);
  display: none;
  min-width: 140px;
  padding: var(--sp-1) 0;
  background: var(--graphite);
  border: 1px solid var(--wire-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}
.context-menu.show {
  display: block;
}

/* Context Menu Item */
.context-menu-item {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  font-size: var(--text-sm);
  color: var(--chalk);
  transition: background var(--duration-fast);
  cursor: pointer;
}
.context-menu-item:hover {
  color: var(--bone);
  background: var(--ember-15);
}
.context-menu-item.danger {
  color: var(--danger);
}
.context-menu-item svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

/* Context Menu Divider */
.context-menu-divider {
  height: 1px;
  margin: var(--sp-1) 0;
  background: var(--wire);
}


/* Export Dialog */
.export-overlay {
  position: fixed;
  z-index: var(--z-modal);
  display: none;
  align-items: center;
  justify-content: center;
  inset: 0;
}

/* Export Overlay */
.export-overlay.open {
  display: flex;
}

/* Export Backdrop */
.export-backdrop {
  position: absolute;
  background: rgba(0, 0, 0, 0.7);
  inset: 0;
}

/* Export Dialog */
.export-dialog {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 90%;
  max-width: 640px;
  max-height: 80vh;
  background: var(--graphite);
  border: 1px solid var(--wire-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  animation: exportDialogIn var(--duration-normal) var(--ease-out);
}

@keyframes exportDialogIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(8px);
  }

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

/* Export Dialog Header */
.export-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-3) var(--sp-4);
  background: var(--carbon);
  border-bottom: 1px solid var(--wire);
  flex-shrink: 0;
}

/* Export Dialog Title */
.export-dialog-title {
  margin: 0;
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--bone);
}

/* Export Dialog Body */
.export-dialog-body {
  flex: 1;
  padding: var(--sp-4);
  overflow-y: auto;
}

/* Export Code Wrap */
.export-code-wrap {
  position: relative;
}

/* Export Code */
.export-code {
  max-height: 50vh;
  margin: 0;
  padding: var(--sp-4);
  padding-right: 80px;
  background: var(--carbon);
  border: 1px solid var(--wire);
  border-radius: var(--radius-md);
  overflow: auto;
}
.export-code code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--chalk);
  white-space: pre;
}

/* Export Copy Btn */
.export-copy-btn {
  position: absolute;
  top: var(--sp-2);
  right: var(--sp-2);
  padding: var(--sp-1) var(--sp-3) !important;
  font-size: var(--text-xs) !important;
}

/* Light theme */
[data-theme="light"] .export-backdrop {
  background: rgba(0, 0, 0, 0.35);
}

/* Export Dialog */
[data-theme="light"] .export-dialog {
  box-shadow: var(--shadow-xl);
}

/* Empty State */
.empty-state.error {
  color: var(--flame);
}
.empty-state.error svg {
  width: 32px;
  height: 32px;
  stroke: var(--flame);
  margin-bottom: var(--sp-3);
}
.empty-state.error .title {
  font-weight: 700;
  margin-bottom: var(--sp-2);
}
.empty-state.error p {
  max-width: 250px;
  line-height: 1.4;
}

/* MINI-CIRCUIT MODAL (U2 Gate) */

#mini-circuit-modal {
  align-items: center;
  justify-content: center;
}

/* Mini Circuit Modal */
#mini-circuit-modal .modal-container {
  max-width: 500px;
  width: calc(100% - 32px);
  min-width: 0;
  max-height: 90vh;
  height: auto;
  flex: none;
  background: var(--graphite);
  border: 1px solid var(--ember);
  border-radius: var(--radius-md);
  box-shadow: var(--glow-ember), var(--shadow-lg);
  padding: 0;
}

/* Mini Circuit Body */
#mini-circuit-body {
  padding: var(--sp-3);
  background: transparent;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  min-width: 0;
  gap: var(--sp-3);
}

/* Mini Circuit Palette */
#mini-circuit-palette {
  margin-bottom: 0;
}