.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.step-nav {
  overflow-x: auto;
}

.step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--space-2);
}

.step-button {
  appearance: none;
  border: var(--border-width) solid var(--border-subtle);
  background: var(--bg-glass);
  color: var(--color-text);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  font-weight: 600;
  font-size: var(--font-size-sm);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  transition: background-color var(--motion-duration) var(--motion-ease),
    border-color var(--motion-duration) var(--motion-ease),
    color var(--motion-duration) var(--motion-ease);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .step-button {
    background: var(--color-surface-elevated);
  }
}

.step-button:hover:not(.is-active):not(.is-unavailable):not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--border-elevated);
}

.step-button.is-active {
  border-color: var(--border-active);
  background: var(--color-action);
  color: var(--color-action-text);
  box-shadow: var(--shadow-control);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.step-button.is-complete:not(.is-active) {
  border-color: var(--color-success);
}

.step-button.is-updating {
  outline: 2px dashed var(--color-accent);
  outline-offset: 2px;
}

.step-button.is-needs-review {
  border-color: var(--color-warning);
}

.step-button.is-unavailable {
  opacity: 0.65;
  color: var(--text-disabled);
  background: var(--disabled-surface);
  border-color: var(--disabled-border);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.button {
  appearance: none;
  border: var(--border-width) solid var(--border-elevated);
  background: var(--bg-glass);
  color: var(--color-text);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  font-weight: 600;
  font-size: var(--font-size-sm);
  min-height: var(--control-height-compact);
  box-shadow: var(--shadow-control);
  transition: background-color var(--motion-duration) var(--motion-ease),
    border-color var(--motion-duration) var(--motion-ease),
    transform var(--motion-duration-fast) var(--motion-ease);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .button:not(.button-primary):not(.file-button) {
    background: var(--color-surface-elevated);
  }
}

.button:active:not(:disabled) {
  transform: scale(0.98);
  background: var(--bg-selected);
}

.button:hover:not(:disabled) {
  border-color: var(--accent-border);
  background: var(--bg-hover);
}

.button:disabled {
  opacity: 1;
  cursor: not-allowed;
  color: var(--text-disabled);
  background: var(--disabled-surface);
  border-color: var(--disabled-border);
  box-shadow: none;
}

.button-primary,
.file-button {
  background: var(--color-action);
  border-color: var(--color-action);
  color: var(--color-action-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  box-shadow: var(--shadow-control);
}

.button-primary:hover:not(:disabled),
.file-button:hover:not(:disabled) {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  filter: none;
}

.button-primary:active:not(:disabled),
.file-button:active:not(:disabled) {
  background: var(--accent-active);
  border-color: var(--accent-active);
}

.button-primary:disabled,
.file-button:disabled {
  background: var(--disabled-surface);
  border-color: var(--disabled-border);
  color: var(--text-disabled);
}

.button-quiet {
  background: transparent;
  border-color: transparent;
  color: var(--color-text-muted);
  font-weight: 500;
}

.button-quiet:hover:not(:disabled) {
  color: var(--color-text);
  border-color: var(--color-border);
}

.button-compact {
  min-height: var(--control-height-compact);
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-xs);
}

.button.is-loading {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.button-stack .button.is-loading {
  justify-content: flex-start;
}

.button.is-loading::before {
  content: "";
  display: inline-block;
  flex-shrink: 0;
  box-sizing: border-box;
  width: 0.85rem;
  height: 0.85rem;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.button-choose-image {
  font-size: var(--font-size-md);
  padding: var(--space-3) var(--space-5);
  min-width: 10rem;
}

.button-secondary {
  background: var(--color-action-secondary-bg);
}

.button-danger {
  background: transparent;
  border-color: var(--color-danger-border);
  color: var(--color-danger);
}

.button-danger:hover:not(:disabled) {
  border-color: var(--color-danger);
  background: var(--color-danger-bg);
}

.button-row,
.button-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.button-stack {
  flex-direction: column;
}

.button-stack .button {
  width: 100%;
  text-align: left;
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.field-inline {
  margin-bottom: 0;
}

.field-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}

.field-value {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.input {
  border: var(--border-width) solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-inset);
  color: var(--color-text);
  padding: var(--space-2) var(--space-3);
  width: 100%;
  box-shadow: inset 0 1px 0 var(--glass-highlight);
}

.input:hover:not(:disabled) {
  border-color: var(--border-elevated);
  background: var(--bg-hover);
}

.input:focus-visible {
  border-color: var(--border-active);
  outline: 2px solid var(--focus-ring-color);
  outline-offset: 1px;
}

.input:disabled {
  color: var(--text-disabled);
  background: var(--disabled-surface);
  border-color: var(--disabled-border);
}

.input-range {
  width: 100%;
}

.panel-title {
  margin: 0 0 var(--space-3);
  font-size: var(--font-size-lg);
  letter-spacing: -0.01em;
}

.help-text {
  margin: 0 0 var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.field > .help-text {
  margin-bottom: 0;
}

.help-pending {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.status-error,
.status-notice {
  margin: 0;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
}

.status-error {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.status-notice {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.privacy-banner {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
}

.field-set {
  border: 0;
  margin: 0 0 var(--space-3);
  padding: 0;
}

.choice-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-1);
}

.choice {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.input-radio {
  accent-color: var(--color-action);
}

.input-color {
  width: 3rem;
  min-height: 2rem;
  padding: 0.15rem;
}

.input-hex {
  font-family: var(--font-mono);
  width: 6.5rem;
  flex: 0 0 auto;
}

.panel-subtitle {
  margin: 0;
  font-size: var(--font-size-md);
}

.transform-controls .panel-subtitle {
  margin-bottom: var(--space-3);
}

.status-warning {
  margin: 0 0 var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.mono-meta {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
}

.preview-compare {
  margin-bottom: var(--space-4);
}

.preview-compare-toolbar {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}

.preview-compare-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.preview-compare-grid.preview-compare-bounded {
  max-height: 11rem;
  overflow: hidden;
  align-items: stretch;
}

.preview-compare-grid.preview-compare-bounded .indexed-preview-canvas {
  max-height: 8.5rem;
  object-fit: contain;
}

.preview-compare-grid[data-mode="both"] {
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.preview-compare-grid[data-mode="side-by-side"] {
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.segmented-control {
  display: flex;
  gap: 0;
  margin-bottom: var(--space-2);
  border: var(--border-width) solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-glass);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
}

.segmented-option {
  flex: 1 1 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-sm);
  cursor: pointer;
  background: transparent;
  color: var(--color-text-secondary);
}

.segmented-option:hover {
  background: var(--bg-hover);
  color: var(--color-text);
}

.segmented-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented-option:has(input:checked) {
  background: var(--color-accent);
  color: var(--color-on-accent);
  font-weight: 600;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.palette-list-compact {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
}

.palette-list-compact .palette-item {
  gap: var(--space-1);
  padding: var(--space-1) 0;
}

.workflow-progress-card {
  margin: 0 0 var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: var(--border-width) solid var(--accent-border);
  box-shadow: var(--shadow-card), inset 0 1px 0 var(--glass-highlight);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .workflow-progress-card {
    background: var(--color-surface-elevated);
  }
}

.workflow-progress-card.is-error {
  border-color: var(--color-danger);
  background: var(--color-danger-bg);
}

.workflow-progress-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.workflow-progress-spinner {
  width: 0.85rem;
  height: 0.85rem;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
}

.workflow-progress-card.is-busy .workflow-progress-spinner {
  animation: workflow-spin 0.8s linear infinite;
}

@keyframes workflow-spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .workflow-progress-card.is-busy .workflow-progress-spinner {
    animation: none;
  }
}

.workflow-progress-percent {
  font-size: var(--font-size-sm);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.workflow-progress-stages {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.workflow-progress-stage {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.workflow-progress-stage.is-active {
  color: var(--color-text);
  font-weight: 600;
}

.workflow-progress-stage.is-complete {
  color: var(--color-text-secondary);
}

.workflow-progress-stage.is-complete .workflow-progress-mark::before {
  content: "✓";
}

.workflow-progress-stage.is-complete .workflow-progress-mark {
  font-size: 0;
}

.workflow-progress-stage.is-complete .workflow-progress-mark::before {
  font-size: var(--font-size-sm);
}

.workflow-footer-status,
.stage-footer-hint {
  margin: 0;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: var(--line-height-body);
  overflow-wrap: anywhere;
  max-width: 100%;
}

.stage-footer-hint[hidden] {
  display: none !important;
}

.relief-summary-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.relief-summary-row[hidden],
.relief-dropdown[hidden] {
  display: none !important;
}

/* Hide relief controls unless Relief surface radio is checked. */
#surface-style-fieldset:not(:has(#surface-style-relief:checked)) .relief-summary-row {
  display: none !important;
}

.relief-summary-text {
  margin: 0;
}

.relief-dropdown {
  position: relative;
  width: 100%;
}

.relief-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  width: 100%;
  text-align: left;
}

.relief-dropdown-trigger::after {
  content: "";
  flex-shrink: 0;
  width: 0.45rem;
  height: 0.45rem;
  margin-top: -0.15rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  opacity: 0.72;
  transition: transform var(--motion-standard) var(--motion-ease);
}

.relief-dropdown-trigger.is-active {
  border-color: var(--accent-border);
  background: var(--accent-surface-hover);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
}

.relief-dropdown-trigger.is-active::after {
  transform: rotate(-135deg);
  margin-top: 0.15rem;
}

.export-relief-editor {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-2);
  padding: var(--space-3);
  border: var(--border-width) solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  box-shadow: var(--shadow-card), inset 0 1px 0 var(--glass-highlight);
  max-height: min(55vh, 32rem);
  overflow-y: auto;
}

.export-relief-editor[hidden] {
  display: none !important;
}

.relief-editor-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.relief-editor-guidance,
.relief-height-summary {
  margin: 0;
}

.export-relief-editor .relief-editor-fieldset {
  margin: 0;
  background: var(--bg-elevated);
  border-color: var(--border-subtle);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
}

.relief-strength-choices {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
}

.relief-strength-choices .choice {
  justify-content: center;
  text-align: center;
}

.relief-editor-actions {
  margin-top: var(--space-2);
  margin-bottom: 0;
}

.canvas-shell.is-updating {
  position: relative;
}

.preview-updating-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-overlay-soft);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 600;
  pointer-events: none;
  z-index: 2;
}

.settings-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1 1 auto;
  min-height: 0;
}

/* Flex gap owns vertical rhythm; neutralize stacked child margins. */
.settings-body > .field,
.settings-body > .help-text,
.settings-body > .panel-title,
.settings-body > .panel-goal,
.settings-body > .tech-disclosure,
.settings-body > .pipeline-status,
.settings-body > .workflow-progress-card,
.settings-body > .control-group,
.settings-body > .image-actions,
.settings-body > .issue-summary,
.settings-body > .preview-compare {
  margin-bottom: 0;
  margin-top: 0;
}

.preview-figure {
  margin: 0;
}

.preview-figure figcaption {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.indexed-preview-canvas {
  display: block;
  width: 100%;
  height: auto;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  background: var(--color-surface-elevated);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-sm);
}

.canvas-fallback-text {
  margin: var(--space-1) 0 0;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.palette-editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.palette-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.palette-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border: var(--border-width) solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
}

.palette-swatch {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: var(--radius-sm);
  border: var(--border-width) solid var(--color-border-strong);
  flex: 0 0 auto;
}

.palette-meta {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  min-width: 5.5rem;
}

.control-group {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: var(--border-width) solid var(--color-border);
}

.image-meta {
  margin: 0 0 var(--space-3);
}

.image-meta-name {
  margin: 0;
  font-weight: 600;
  font-size: var(--font-size-sm);
  word-break: break-all;
}

.image-meta-dims {
  margin: var(--space-1) 0 0;
  color: var(--color-text-muted);
}

.derived-settings {
  margin: 0 0 var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: var(--border-width) solid var(--border-subtle);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
}

.derived-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  margin: 0 0 var(--space-2);
}

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

.derived-row dt {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 600;
}

.derived-row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

.print-report {
  margin: var(--space-3) 0;
}

.print-report-title {
  margin: 0 0 var(--space-2);
  font-size: var(--font-size-sm);
}

.print-report-warnings {
  margin: var(--space-2) 0 0;
  padding-left: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-warning);
}

.print-actions {
  margin-top: var(--space-2);
}

.issue-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-3) 0;
  font-size: var(--font-size-xs);
}

.issue-swatch {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border: var(--border-width) solid var(--color-border);
}

.issue-swatch::before {
  content: "";
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 2px;
}

.issue-island::before { background: var(--color-issue-island); }
.issue-hole::before { background: var(--color-issue-hole); }
.issue-feature::before { background: var(--color-issue-feature); }
.issue-gap::before { background: var(--color-issue-gap); }

#print-compare-grid[data-mode="side-by-side"] {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}


.export-readiness {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
  font-size: var(--font-size-sm);
}

.export-check.is-ok { color: var(--color-success); }
.export-check.is-missing { color: var(--color-text-muted); }

.export-check.is-complete::after {
  content: "";
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  margin-left: var(--space-2);
  border-radius: 50%;
  background: var(--color-success);
  vertical-align: middle;
  animation: check-pop var(--motion-duration) var(--motion-ease);
}

@keyframes check-pop {
  from { transform: scale(0.4); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.export-gaps {
  color: var(--color-warning);
}

.panel-footer.stage-continue {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: var(--border-width) solid var(--color-border);
}

.panel-footer.stage-continue .button {
  width: 100%;
}

.tech-disclosure {
  margin: 0 0 var(--space-3);
  border: var(--border-width) solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
  padding: var(--space-2) var(--space-3);
}

.tech-disclosure > summary {
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  list-style: none;
}

.tech-disclosure > summary::-webkit-details-marker {
  display: none;
}

.tech-disclosure > summary::before {
  content: "▸ ";
  display: inline-block;
  transition: transform var(--motion-duration) var(--motion-ease);
}

.tech-disclosure[open] > summary::before {
  transform: rotate(90deg);
}

.tech-disclosure[open] > *:not(summary) {
  animation: disclose-in var(--motion-duration) var(--motion-ease);
}

.tech-disclosure[open] > summary + * {
  margin-top: var(--space-3);
}

.quiet-disclosure > .button-row {
  margin-bottom: 0;
}

@keyframes disclose-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.issue-summary {
  margin: 0 0 var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: var(--border-width) solid var(--border-subtle);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.export-color-downloads {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin: var(--space-3) 0;
}

.export-color-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.export-color-swatch {
  width: 1rem;
  height: 1rem;
  border: var(--border-width) solid var(--color-border-strong);
  flex: 0 0 auto;
}

.export-color-label {
  flex: 1 1 auto;
  font-size: var(--font-size-sm);
  font-family: var(--font-mono);
}

.export-deferred {
  margin-top: var(--space-4);
  opacity: 0.85;
}

.export-base-color-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-2);
}

.export-base-color-row input[type="color"] {
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.export-3mf-swatches {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-2);
}

.export-3mf-swatch {
  width: 1rem;
  height: 1rem;
  border-radius: var(--radius-sm);
  border: var(--border-width) solid var(--color-border);
}

.surface-style-fieldset,
.nested-fieldset {
  border: var(--border-width) solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  margin: 0 0 var(--space-4);
  background: var(--bg-glass);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
}

.printing-option-block {
  margin: 0 0 var(--space-4);
}

.printing-option-block .panel-subtitle {
  margin-bottom: var(--space-2);
}

.surface-style-fieldset > legend,
.nested-fieldset > legend {
  padding: 0 var(--space-1);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.choice-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.surface-color-height-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin: var(--space-3) 0;
}

.surface-color-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border: var(--border-width) solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
}

.surface-swatch {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: var(--radius-sm);
  border: var(--border-width) solid var(--color-border-strong);
  flex: 0 0 auto;
}

.surface-swatch-sm {
  width: 1rem;
  height: 1rem;
}

.surface-color-meta {
  flex: 1 1 auto;
  font-size: var(--font-size-sm);
}

.surface-color-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.surface-height-preview-wrap {
  margin: var(--space-3) 0;
}

.surface-height-preview {
  display: block;
  max-width: 100%;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-recessed);
  image-rendering: pixelated;
}

.surface-legend-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
  margin-top: var(--space-2);
}

.surface-legend-table th,
.surface-legend-table td {
  text-align: left;
  padding: var(--space-1) var(--space-2);
  border-bottom: var(--border-width) solid var(--color-border);
}

.notice-inline {
  color: var(--color-warning);
  background: var(--color-warning-bg);
  padding: var(--space-2);
  border-radius: var(--radius-md);
}

.status-line {
  margin: 0 0 var(--space-3);
  font-size: var(--font-size-sm);
}

.app-status-card,
.toast {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: var(--border-width) solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: linear-gradient(
    145deg,
    rgba(48, 39, 26, 0.92) 0%,
    rgba(32, 29, 24, 0.88) 100%
  );
  box-shadow:
    var(--shadow-panel),
    inset 0 1px 0 var(--glass-highlight),
    0 0 0 1px rgba(0, 0, 0, 0.18);
  -webkit-backdrop-filter: blur(calc(var(--glass-blur) + 2px));
  backdrop-filter: blur(calc(var(--glass-blur) + 2px));
  animation: toast-in var(--motion-duration) var(--motion-ease);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .app-status-card,
  .toast {
    background: var(--color-surface-elevated);
  }
}

.app-status-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  width: 100%;
  margin-bottom: var(--space-1);
}

.app-status-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-control);
  background: var(--accent-muted);
  border: var(--border-width) solid var(--accent-border);
  color: var(--text-accent);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: var(--line-height-tight);
}

.app-status-kind {
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  line-height: var(--line-height-tight);
}

.app-status-body,
.toast-body {
  flex: 1 1 auto;
  min-width: min(100%, 12rem);
}

.app-status-message,
.toast-message {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-body);
  color: var(--color-text);
}

.app-status-success,
.toast-success {
  border-color: rgba(143, 174, 89, 0.38);
  box-shadow:
    var(--shadow-panel),
    inset 0 1px 0 var(--glass-highlight),
    inset 3px 0 0 var(--color-success),
    0 0 24px rgba(143, 174, 89, 0.08);
}

.app-status-success .app-status-kind,
.toast-success .toast-label {
  color: var(--color-success);
}

.app-status-error,
.toast-error {
  border-color: rgba(197, 111, 98, 0.42);
  box-shadow:
    var(--shadow-panel),
    inset 0 1px 0 var(--glass-highlight),
    inset 3px 0 0 var(--color-error),
    0 0 24px rgba(197, 111, 98, 0.08);
}

.app-status-error .app-status-kind,
.toast-error .toast-label {
  color: var(--color-error);
}

.app-status-warning {
  border-color: rgba(214, 165, 72, 0.42);
  box-shadow:
    var(--shadow-panel),
    inset 0 1px 0 var(--glass-highlight),
    inset 3px 0 0 var(--color-warning),
    0 0 24px rgba(214, 165, 72, 0.08);
}

.app-status-warning .app-status-kind {
  color: var(--color-warning);
}

.app-status-busy {
  border-color: rgba(213, 138, 37, 0.42);
  box-shadow:
    var(--shadow-panel),
    inset 0 1px 0 var(--glass-highlight),
    inset 3px 0 0 var(--color-accent),
    0 0 24px var(--accent-muted);
}

.app-status-busy .app-status-kind {
  color: var(--color-accent);
}

.app-status-info {
  border-color: var(--border-elevated);
  box-shadow:
    var(--shadow-card),
    inset 0 1px 0 var(--glass-highlight),
    inset 3px 0 0 var(--color-text-muted);
}

.toast-label {
  margin: 0 0 var(--space-1);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  line-height: var(--line-height-tight);
}

.app-status-dismiss,
.toast-dismiss {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  margin: calc(-1 * var(--space-1)) calc(-1 * var(--space-1)) calc(-1 * var(--space-1)) auto;
  padding: 0;
  border: var(--border-width) solid transparent;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 1.125rem;
  line-height: 1;
  cursor: pointer;
}

.app-status-dismiss:hover,
.toast-dismiss:hover {
  color: var(--color-text);
  border-color: var(--color-border);
  background: var(--accent-surface-hover);
}

.app-status-dismiss:focus-visible,
.toast-dismiss:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(0.4rem);
  }

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

@media (prefers-reduced-motion: reduce) {
  .toast,
  .app-status-card,
  .control-section.is-active,
  .tech-disclosure[open] > *:not(summary),
  .export-check.is-complete::after,
  .button.is-loading::before {
    animation: none !important;
  }

  .tech-disclosure > summary::before {
    transition: none;
  }
}