/* Preview strip controls and accordion panels. */

/* ---------- Strip above the preview ---------- */
.canvas-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  min-height: 44px;
  padding: 6px 12px;
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
}
.canvas-strip .view-toggle .toggle {
  padding-inline: 12px;
}
.canvas-strip .button-row {
  gap: 2px;
}
.backdrop-row {
  display: flex;
  align-items: center;
  gap: 4px;
}
.backdrop-label {
  margin-right: 4px;
  color: var(--text-faint);
  font-size: var(--fs-sm);
}
/* Each swatch is the backdrop color; the pressed ring shows it is on. */
.backdrop-toggle {
  --backdrop: #00b140;
  width: 26px;
  height: 26px;
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  background: var(--backdrop);
  cursor: pointer;
}
#white-screen {
  --backdrop: #fff;
}
#black-screen {
  --backdrop: #000;
}
.backdrop-toggle:hover {
  border-color: var(--text-dim);
}
.backdrop-toggle[aria-pressed="true"] {
  border-color: var(--bg);
  box-shadow: 0 0 0 2px var(--accent);
}
.backdrop-toggle:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

/* Path mode reads as one segmented control; the radios stay the inputs. */
.segmented {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
}
.segmented legend {
  margin-bottom: 6px;
}
.segmented .choice {
  position: relative;
  justify-content: center !important;
  min-height: var(--control-h);
  border: 1px solid var(--border);
  color: var(--text-dim);
  background: var(--surface-2);
  cursor: pointer;
}
.segmented .choice + .choice {
  border-left: 0;
}
.segmented .choice:first-of-type {
  border-radius: var(--r-sm) 0 0 var(--r-sm);
}
.segmented .choice:last-of-type {
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}
/* The invisible radio covers its segment, so clicks and taps land on it. */
.segmented .choice input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}
.segmented .choice:has(input:checked) {
  color: var(--text);
  background: var(--surface-3);
  box-shadow: inset 0 -2px 0 var(--accent);
}
.segmented .choice:has(input:focus-visible) {
  z-index: 1;
  box-shadow: var(--ring);
}
.segmented .choice:has(input:disabled) {
  opacity: var(--disabled-opacity);
  cursor: default;
}

.panel-step {
  display: inline-flex;
  flex: none;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  color: var(--text-faint);
  font-size: 10px;
  letter-spacing: 0;
}

.subfield {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
}
.color-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}
.color-row input[type="color"] {
  width: 56px;
  flex-shrink: 0;
}
.color-row .button {
  min-height: var(--control-h);
  padding: 0 10px;
  font-size: var(--fs-md);
  flex: 1;
}
.color-row .button[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--accent);
}
#physical-size-field .color-row {
  justify-content: flex-end;
}
#physical-size-field .color-row input[type="number"] {
  flex: 0 1 96px;
  width: 96px;
}
#physical-size-field .color-row select {
  flex: 0 0 88px;
  width: 88px;
}
.icon-button[aria-pressed="true"] {
  background: var(--surface-hover);
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--accent);
}
.preview.picking {
  cursor: crosshair;
}
.preview.picking img {
  cursor: crosshair;
}
.palette-grid {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 6px;
  margin-top: 8px;
}
.palette-grid .swatch,
.palette-chip {
  border: 1px solid var(--border-input);
  border-radius: var(--r-sm);
}
.palette-grid .swatch {
  position: relative;
  aspect-ratio: 1;
  min-height: 0;
  padding: 0;
  cursor: pointer;
}
.palette-grid .swatch:focus-visible,
.palette-edit-row:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}
.palette-grid .swatch[aria-pressed="true"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.palette-grid .swatch.edited::after {
  content: "";
  position: absolute;
  top: 2px;
  right: 2px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--bg);
  border-radius: 50%;
  background: var(--accent);
}
.swatch.hidden-color,
.palette-chip.hidden-color {
  position: relative;
  opacity: 0.55;
}
.swatch.hidden-color::before,
.palette-chip.hidden-color::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 5%;
  width: 90%;
  height: 3px;
  background: var(--text);
  box-shadow: 0 0 0 1px #000;
  transform: translateY(-50%) rotate(-45deg);
  pointer-events: none;
}
/* Selected for merging: a ring outside the swatch, distinct from the
   editing ring. */
.palette-grid .swatch.selected {
  box-shadow:
    0 0 0 2px var(--bg),
    0 0 0 4px var(--accent);
}
/* A merged swatch shows how many traced colors it covers. */
.swatch-merge-badge {
  position: absolute;
  top: -5px;
  right: -5px;
  min-width: 16px;
  height: 16px;
  padding: 0 3px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--surface-3);
  color: var(--text);
  font-size: 10px;
  font-weight: 600;
  line-height: 14px;
  text-align: center;
  pointer-events: none;
}
#palette-merge {
  width: 100%;
}
/* Pick keeps its label on one line; Select takes only what it needs. */
#palette-pick {
  flex: 1;
}
#palette-select {
  flex: none;
}
.swatch-hidden-badge {
  position: absolute;
  bottom: 1px;
  right: 1px;
  display: grid;
  place-items: center;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--surface-3);
  color: var(--text);
  pointer-events: none;
}
.swatch-hidden-badge .icon {
  width: 10px;
  height: 10px;
}
#palette-hidden-note {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 8px 0 0;
  color: var(--accent-hover);
  font-size: 12px;
}
#palette-hidden-note .icon {
  width: 12px;
  height: 12px;
}
.swatch-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}
.swatch-field .palette-grid {
  margin-top: 0;
}
.swatch-field .palette-grid:empty,
.swatch-field .palette-hint:empty {
  display: none;
}
.swatch-input {
  flex: 1;
  min-width: 0;
  min-height: var(--control-h);
  padding: 4px 8px;
  border: 1px solid var(--border-input);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: var(--text);
  font: var(--fs-sm) var(--font-mono);
}
.swatch-field .color-row .button {
  flex: 1;
}
.swatch-field .color-row .button#swatch-add {
  flex: 0 0 auto;
}
.palette-hint {
  margin: 8px 0 0;
  font-size: var(--fs-sm);
  color: var(--text-dim);
}
.palette-layering-note {
  margin-top: 10px;
  font-size: var(--fs-sm);
  color: var(--text-dim);
}
.palette-layering-note p {
  margin: 0 0 8px;
}
.palette-editor {
  display: grid;
  gap: 8px;
  margin-top: 10px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface-2);
}
.palette-editor[hidden] {
  display: none;
}
.palette-editor-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-sm);
  color: var(--text-dim);
}
/* Ghost: a quiet dismiss next to the editor's real actions. */
.palette-close {
  margin-left: auto;
  min-height: var(--control-h-sm);
  padding: 0 8px;
  border-color: transparent;
  background: transparent;
  color: var(--text-dim);
  font-size: var(--fs-sm);
}
.palette-close:hover {
  background: var(--surface-hover);
  color: var(--text);
}
.palette-chip {
  display: inline-block;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
}
/* Six tracks: color + HEX on the first row, R/G/B on the second, so the
   number fields keep room for three digits in the narrow sidebar. */
.palette-editor-fields {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  align-items: end;
}
.palette-editor-fields input[type="color"] {
  grid-column: span 2;
  padding: 2px;
}
.palette-editor-fields .palette-field {
  grid-column: span 2;
}
.palette-editor-fields .palette-field:has(#palette-hex) {
  grid-column: span 4;
}
.palette-field input[type="number"] {
  appearance: textfield;
}
.palette-field input[type="number"]::-webkit-inner-spin-button,
.palette-field input[type="number"]::-webkit-outer-spin-button {
  appearance: none;
  margin: 0;
}
.palette-field {
  display: grid;
  gap: 2px;
  min-width: 0;
  font-size: var(--fs-xs);
  color: var(--text-dim);
}
.palette-field input {
  width: 100%;
  min-width: 0;
  min-height: var(--control-h);
  padding: 4px 6px;
  border: 1px solid var(--border-input);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: var(--text);
  font: var(--fs-sm) var(--font-mono);
}
.palette-field input:focus {
  border-color: var(--accent);
  outline: none;
}
.palette-field input[aria-invalid="true"] {
  border-color: var(--error);
}
.palette-error {
  margin: 6px 0 0;
  color: var(--error);
  font-size: var(--fs-sm);
}
.palette-edits {
  display: grid;
  gap: 4px;
  margin: 8px 0;
  padding: 0;
  list-style: none;
}
.palette-edits:empty {
  display: none;
}
.palette-edit-row {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  padding: 4px 6px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
}
.palette-edit-row code {
  overflow: hidden;
  font-size: var(--fs-xs);
  text-overflow: ellipsis;
  white-space: nowrap;
}
.subfield label {
  font-weight: 500;
  font-size: var(--fs-sm);
  color: var(--text-dim);
}

/* One frame per color well: drop the UA swatch border inside ours. */
input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}
input[type="color"]::-webkit-color-swatch {
  border: 0;
  border-radius: var(--r-xs);
}
input[type="color"]::-moz-color-swatch {
  border: 0;
  border-radius: var(--r-xs);
}

select,
input[type="color"] {
  min-height: var(--control-h);
  padding: 4px 8px;
  border: 1px solid var(--border-input);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: var(--text);
  font: inherit;
  width: 100%;
}

input[type="range"] {
  appearance: none;
  width: 100%;
  min-height: 24px;
  background: transparent;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: var(--border-input);
}
input[type="range"]::-moz-range-track,
input[type="range"]::-moz-range-progress {
  height: 4px;
  border-radius: 2px;
  background: var(--border-input);
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  margin-top: -5px;
  border: 2px solid var(--surface-1);
  border-radius: 50%;
  background: var(--accent);
  box-sizing: border-box;
}
input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 2px solid var(--surface-1);
  border-radius: 50%;
  background: var(--accent);
  box-sizing: border-box;
}
input[type="range"]:hover::-webkit-slider-thumb {
  background: var(--accent-hover);
}
input[type="range"]:hover::-moz-range-thumb {
  background: var(--accent-hover);
}
input[type="range"]:disabled {
  opacity: var(--disabled-opacity);
  cursor: default;
}
input[type="radio"],
input[type="checkbox"] {
  flex: none;
  /* UA margins pushed boxes off the label column and below the text. */
  margin: 0;
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}

/* ---------- Accordion panels in the controls column ---------- */
.panel {
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
}

.panel > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 16px;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 0;
  user-select: none;
  line-height: 16px;
  color: var(--text-dim);
}

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

.panel > summary::after {
  content: "";
  width: 14px;
  height: 14px;
  flex: none;
  background: currentColor;
  -webkit-mask: url("../assets/icons/lucide/chevron-down.svg") center / contain no-repeat;
  mask: url("../assets/icons/lucide/chevron-down.svg") center / contain no-repeat;
  color: var(--text-faint);
  transition: transform 160ms ease-out;
}

.panel[open] > summary::after {
  transform: rotate(180deg);
}

details.advanced > summary::after {
  content: "";
  width: 12px;
  height: 12px;
  margin-right: 1px;
  background: currentColor;
  -webkit-mask: url("../assets/icons/lucide/chevron-down.svg") center / contain no-repeat;
  mask: url("../assets/icons/lucide/chevron-down.svg") center / contain no-repeat;
  color: var(--text-faint);
  transition: transform 160ms ease-out;
}
details.advanced[open] > summary::after {
  transform: rotate(180deg);
}

.panel > summary:hover {
  color: var(--text);
}

.panel > summary:hover::after,
details.advanced > summary:hover::after {
  color: var(--text-dim);
}

.panel > summary:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

.panel-body {
  display: grid;
  gap: 14px;
  padding: 4px 16px 20px;
}
.panel-heading {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 8px;
}
.panel-summary {
  overflow: hidden;
  color: var(--text-faint);
  font-size: var(--fs-xs);
  font-weight: 400;
  letter-spacing: 0;
  text-overflow: ellipsis;
  text-transform: none;
  white-space: nowrap;
}
.panel[open] .panel-summary {
  display: none;
}
.conditional-fields:not(:has(> :not([hidden]))) {
  display: none;
}
.conditional-fields {
  display: grid;
  gap: 14px;
  padding-left: 12px;
  border-left: 2px solid var(--border);
}

/* Nested advanced block: quieter than a top-level panel */
details.advanced > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  cursor: pointer;
  font-size: var(--fs-md);
  font-weight: 500;
  color: var(--text-dim);
  user-select: none;
}
details.advanced > summary::-webkit-details-marker {
  display: none;
}

details.advanced > summary:hover {
  color: var(--text);
}

details.advanced[open] {
  display: grid;
  gap: 10px;
}