:root {
  /* Typography: interface and tags are mono; authored content opts into sans. */
  --font-ui: "Roboto Mono", Consolas, monospace;
  --font-content: "Roboto", Arial, sans-serif;
  --text-caption: 0.75rem;
  --text-small: 0.8125rem;
  --text-body: 0.875rem;
  --text-content: 0.9375rem;
  --text-heading: 1rem;
  --text-title: 1.25rem;
  --weight-regular: 400;
  --weight-emphasis: 600;
  --leading-body: 1.45;

  --page-bg-color: #191918;
  --panel-bg-color: #2a2826;
  --sub-panel-bg-color: #323130;
  --surface-elevated-color: #383633;
  --text-primary-color: #d7d7d7;
  --text-muted-color: #aaa69e;
  --text-label-color: #c7c4be;
  --control-height: 36px;
  --danger-color: #b33b2e;
  --text-on-danger-color: #ffffff;
  --border-color: #6c6860;

  --button-bg-color: #383633;
  --button-active-bg-color: #484643;
  --button-hover-bg-color: #3b3938;

  --grid-scroll-surface-color: var(--panel-bg-color);
  --grid-surface-color: #2f2d2a;
  --grid-line-color: #4f4b43;
  --grid-line-width: 2px;

  --area-color-dark-mix-base: #000000;
  --area-color-light-mix-base: white;
  --area-selection-outline-color: white;
  --area-label-text-color: #1a1a1a;
  --area-corner-radius: 8px;
  --resize-handle-inset: 2px;
  --resize-handle-corner-radius: 4px;
  --draft-outline-color: #1f1f1f;
  --draft-fill-color: rgba(14, 108, 99, 0.2);
  --draft-blocked-outline-color: #b33b2e;
  --draft-blocked-fill-color: rgba(179, 59, 46, 0.2);

  --gap-1: 2px;
  --gap-2: 4px;
  --gap-3: 6px;
  --gap-4: 8px;
  --gap-5: 10px;
  --gap-6: 12px;
  --gap-7: 16px;
  --gap-8: 20px;
  --gap-9: 24px;

  /* Nested radii: panel 12 - 8 = 4; tabs 12 - 4 = 8;
     popover 16 - 8 = 8; popup 24 - 16 = 8. Panel descendants
     remain square when padding consumes the available radius. */
  --surface-radius: var(--gap-4);
  --panel-child-radius: var(--gap-2);
  --panel-inset: var(--gap-4);
  --panel-radius: var(--gap-6);
  --tabs-inset: var(--gap-2);
  --tabs-radius: var(--panel-radius);
  --tabs-child-radius: var(--gap-4);
  --popover-inset: var(--gap-4);
  --popover-radius: var(--gap-7);
  --popup-inset: var(--gap-7);
  --popup-radius: var(--gap-9);
  --panel-gap: var(--gap-6);
  --info-section-gap: var(--gap-8);
  --info-content-gap: var(--gap-4);
  --info-card-inset: var(--gap-3);
  --grid-cell-size: 30px;
  --popup-overlay-color: rgba(10, 10, 10, 0.65);
  --popup-window-bg-color: #2f2d2a;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 100%;
}

body {
  height: 100%;
  margin: 0;
  font-family: var(--font-ui);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  line-height: var(--leading-body);
  color: var(--text-primary-color);
  background: var(--page-bg-color);
  overflow: hidden;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
.panel-header h2,
.all-grid-title,
.side-view-dimension,
#selection-panel .info-section > h2,
.tag-manager-label,
.tag-chip,
.entrance-label,
.floor-search-status,
.form-grid label,
.shelf-editor-title {
  -webkit-user-select: none;
  user-select: none;
}

.preview-layer-card .preview-layer-text,
.form-grid input,
.form-grid textarea {
    -webkit-user-select: text;
    user-select: text;
}

.app-shell {
  height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: var(--gap-4);
  padding: var(--gap-4);
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--gap-7);
  min-width: 0;
}

.app-header-actions {
  display: flex;
  align-items: center;
  gap: var(--gap-4);
  flex: 0 0 auto;
}

.button-medium,
.tag-add-button,
.tag-suggestion-button {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--gap-3);
  min-height: var(--control-height);
  margin: 0;
  padding: 8px 12px;
  border: 0;
  border-radius: var(--surface-radius);
  background: var(--button-bg-color);
  color: var(--text-primary-color);
  font-family: var(--font-ui);
  font-size: var(--text-small);
  font-weight: 500;
  line-height: 18px;
  text-align: center;
  cursor: pointer;
}

.button-medium:hover:not(:disabled),
.tag-add-button:hover:not(:disabled),
.tag-suggestion-button:hover:not(:disabled) {
  background-color: var(--button-hover-bg-color);
  color: var(--text-primary-color);
}

.button-medium:focus-visible,
.tag-add-button:focus-visible,
.tag-suggestion-button:focus-visible,
.preview-photo-thumb:focus-visible {
  outline: 2px solid var(--area-selection-outline-color);
  outline-offset: 1px;
}

.button-medium.active {
  background-color: var(--button-active-bg-color);
  color: var(--text-primary-color);
}

.button-nav {
  font-weight: var(--weight-emphasis);
  padding-inline: 8px;
}

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

.button-danger:hover:not(:disabled) {
  color: var(--text-on-danger-color);
  border-color: transparent;
  background: color-mix(in srgb, var(--danger-color), black 15%);
}

.workspace {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--gap-4);
}

.panel-card {
  --surface-radius: var(--panel-child-radius);
  /* Surfaces own their inset; sibling spacing belongs to the parent gap. */
  display: flex;
  flex-direction: column;
  gap: var(--panel-gap);
  padding: var(--panel-inset);
  background: var(--panel-bg-color);
  border: 0;
  border-radius: var(--panel-radius);
  min-height: 0;
  min-width: 0;
  overflow: hidden;
}

.panel-card > .panel-header,
.panel-card > .info-panel-tags {
  flex: 0 0 auto;
}

.panel-card > .panel-body {
  flex: 1 1 0;
  min-width: 0;
}

.workspace.settings-active {
  display: block;
}

.workspace > [hidden] {
  display: none;
}

.settings-panel {
  height: 100%;
}

.settings-panel-content {
  overflow: auto;
}

.settings-list {
  width: min(100%, 640px);
  margin-inline: auto;
  display: grid;
  gap: var(--gap-9);
}

.settings-category {
  display: grid;
  gap: var(--panel-gap);
}

.settings-items {
  display: grid;
  gap: var(--panel-gap);
  margin: 0;
  padding: 0;
  list-style: none;
}

.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap-7);
}

.settings-item > .button-medium {
  min-width: 96px;
  flex-shrink: 0;
}

.panel-header {
  background: var(--panel-bg-color);
}

.panel-header h2 {
  margin: 0;
  text-align: left;
  font-size: var(--text-heading);
}

.panel-header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: var(--gap-4);
  min-width: 0;
}

.panel-header-main h2 {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.header-photo-indicator,
.preview-layer-photo-icon {
  position: relative;
  width: 14px;
  height: 10px;
  flex: 0 0 auto;
  border: 1.5px solid var(--text-primary-color);
  border-radius: 2px;
}

.header-photo-indicator::before,
.preview-layer-photo-icon::before {
  content: "";
  position: absolute;
  left: 2px;
  top: -4px;
  width: 6px;
  height: 3px;
  border: 1.5px solid var(--text-primary-color);
  border-bottom: none;
  border-radius: 2px 2px 0 0;
}

.header-photo-indicator::after,
.preview-layer-photo-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 3px;
  height: 3px;
  border: 1.5px solid var(--text-primary-color);
  border-radius: 50%;
  transform: translate(-50%, -40%);
}

.panel-body {
  min-height: 0;
  background: var(--grid-scroll-surface-color);
}

.view-panel-header {
  display: grid;
  gap: var(--gap-5);
  min-height: var(--control-height);
}

.info-panel-header {
  display: flex;
  align-items: center;
  min-height: var(--control-height);
}

.panel-header-main h2 {
  display: flex;
  align-items: center;
  gap: var(--gap-4);
  overflow-x: auto;
}

.tree-part {
  height: var(--control-height);
  min-height: var(--control-height);
  flex: 0 0 auto;
  padding: 0 12px;
  font: inherit;
  white-space: nowrap;
}

.info-panel-content {
  overflow: auto;
}

#selection-panel {
  display: grid;
  align-content: start;
  gap: var(--info-section-gap);
}

.info-panel {
  container-type: inline-size;
}

/* The body owns scrolling; sections own spacing, never their child margins. */
.info-section {
  display: grid;
  align-content: start;
  gap: var(--info-content-gap);
}

.info-panel-content,
#selection-panel,
#selection-panel > *,
.info-section > * {
  min-width: 0;
}

.info-panel-tags {
  background: var(--grid-scroll-surface-color);
  display: grid;
  gap: var(--panel-gap);
  max-height: 35vh;
  overflow: auto;
}

.info-panel-tags[hidden] {
  display: none;
}

.info-panel-tags:has(.popover-open) {
  overflow: visible;
}

.info-panel-tags .tag-popover {
  top: auto;
  bottom: calc(100% + 6px);
}

.info-section h2 {
  margin: 0;
  font-size: var(--text-heading);
}

.hint {
  margin: 0;
  color: var(--text-muted-color);
  font-size: var(--text-body);
  line-height: 1.35;
}

.hint.small {
  font-size: var(--text-small);
}

.floor-item-search {
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: var(--gap-6);
}

.floor-search-results {
  display: grid;
  gap: var(--gap-4);
  list-style: none;
  margin: 0;
  align-content: start;
  overflow: auto;
  min-height: 0;
  padding: 0;
}

.floor-search-results:empty {
  display: none;
}

.floor-search-results > li {
  min-width: 0;
}

.floor-search-result {
  width: 100%;
  white-space: normal;
  display: grid;
  justify-content: stretch;
  gap: var(--gap-4);
}

.floor-search-result-title {
  font-size: var(--text-content);
  font-weight: var(--weight-emphasis);
}

.floor-search-location {
  display: block;
  font-family: var(--font-ui);
  font-size: var(--text-caption);
  font-weight: var(--weight-regular);
  color: var(--text-muted-color);
}

.floor-search-excerpt {
  display: grid;
  gap: var(--gap-2);
  font-weight: var(--weight-regular);
  white-space: pre-wrap;
}

.floor-search-result:hover:not(:disabled) {
  background: color-mix(in srgb, var(--button-bg-color), var(--button-active-bg-color) 50%);
}

.floor-search-result.search-result-selected,
.floor-search-result.search-result-selected:hover:not(:disabled) {
  background: var(--button-active-bg-color);
}

.floor-search-photo-unavailable {
  display: grid;
  place-items: center;
  padding: var(--gap-6);
  color: var(--text-primary-color);
}

.tree-separator {
  color: var(--text-muted-color);
  flex: 0 0 auto;
  width: 0.625em;
  height: 1em;
  fill: currentColor;
}

.container-tabs {
  display: flex;
  gap: var(--gap-2);
  min-width: 0;
  max-width: 100%;
  padding: var(--tabs-inset);
  border-radius: var(--tabs-radius);
  background: var(--panel-bg-color);
  overflow-x: auto;
}

.container-tabs .button-nav {
  flex: 0 0 auto;
  min-height: 32px;
  padding: 6px 16px;
  border-radius: var(--tabs-child-radius);
  background: transparent;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.container-tabs .button-nav:hover:not(:disabled) {
  background: transparent;
  color: #ffffff;
}

.container-tabs .button-nav.active,
.container-tabs .button-nav.active:hover:not(:disabled) {
  background: var(--button-active-bg-color);
  color: #ffffff;
}

.grid-scroll-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--panel-gap);
  height: 100%;
  overflow: auto;
  padding: 0 130px;
  background: var(--grid-scroll-surface-color);
  border-radius: 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.grid-scroll-wrap.all-mode {
  padding: 0;
  overflow: hidden;
}

.grid-scroll-wrap::-webkit-scrollbar {
  width: 0;
  height: 0;
  display: none;
}

.container-content {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
}

.container-content > .side-view-panel {
  display: none;
  border: 0;
  border-radius: 0;
  min-height: 0;
  height: 100%;
  background: var(--grid-scroll-surface-color);
  overflow: auto;
}

.container-content.side-mode {
  grid-template-columns: minmax(0, 1fr);
}

.container-content.side-mode .grid-scroll-wrap,
.container-content.side-mode .minimap {
  display: none;
}

.container-content.side-mode > .side-view-panel {
  display: flex;
}

.grid {
  position: relative;
  margin: 0 auto;
  flex: 0 0 auto;
  background-color: var(--grid-surface-color);
  overflow: visible;
  user-select: none;
  touch-action: none;
}

.all-grids-host {
  display: none;
  width: 100%;
  height: 100%;
  min-height: 0;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.all-grids-stage-holder {
  position: relative;
  flex: 0 0 auto;
}

.all-grids-stage {
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  width: max-content;
  transform-origin: top left;
}

.all-grid-card {
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
  flex: 0 0 auto;
}

.all-grid-title,
.floor-search-status,
.search-container-title {
  margin: 0;
  font-size: var(--text-body);
  color: var(--text-muted-color);
  font-weight: var(--weight-emphasis);
}

.all-grid {
  margin: 0 auto;
}

.grid-cells {
  position: absolute;
  inset: 0;
  display: grid;
  pointer-events: none;
}

.grid-cell {
  border-right: var(--grid-line-width) solid var(--grid-line-color);
  border-bottom: var(--grid-line-width) solid var(--grid-line-color);
}

.grid-cell.top-edge {
  border-top: var(--grid-line-width) solid var(--grid-line-color);
}

.grid-cell.left-edge {
  border-left: var(--grid-line-width) solid var(--grid-line-color);
}

.entrance-label {
  margin: 0 auto;
  flex: 0 0 auto;
  text-align: center;
  color: var(--text-muted-color);
  font-size: var(--text-title);
  font-weight: var(--weight-emphasis);
  letter-spacing: 0.02em;
}

.minimap {
  position: relative;
  width: var(--minimap-width, 96px);
  background: var(--grid-scroll-surface-color);
  overflow: hidden;
  cursor: pointer;
}

.minimap-canvas {
  position: absolute;
  background: var(--grid-surface-color);
}

.minimap-area {
  position: absolute;
  border: 1px solid color-mix(in srgb, var(--area-color), var(--area-color-dark-mix-base) 35%);
  background: color-mix(in srgb, var(--area-color), var(--area-color-light-mix-base) 35%);
}

.minimap-area.selected {
  border-color: var(--area-selection-outline-color);
}

.minimap-viewport {
  position: absolute;
  border: 0;
  background: color-mix(in srgb, var(--area-selection-outline-color), transparent 85%);
  pointer-events: none;
}

.area {
  position: absolute;
  z-index: 1;
  border: 2px solid color-mix(in srgb, var(--area-color), var(--area-color-dark-mix-base) 30%);
  background: color-mix(in srgb, var(--area-color), var(--area-color-light-mix-base) 46%);
  border-radius: var(--area-corner-radius);
  overflow: hidden;
  cursor: pointer;
}

.area.selected,
.area.search-highlighted,
.area.hovered {
  z-index: 10;
  border-color: var(--area-selection-outline-color);
}

.area-side-labels {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}

.area-float-label {
  position: absolute;
  max-width: 180px;
  padding: 4px 8px;
  border-radius: var(--surface-radius);
  border: 2px solid color-mix(in srgb, var(--area-color), var(--area-color-dark-mix-base) 30%);
  background: color-mix(in srgb, var(--area-color), var(--area-color-light-mix-base) 46%);
  color: var(--area-label-text-color);
  font-size: var(--text-caption);
  font-weight: var(--weight-emphasis);
  line-height: 1.2;
  display: flex;
  align-items: center;
  gap: var(--gap-3);
  pointer-events: auto;
  cursor: pointer;
}

.area-float-label-text {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}

.area-float-label-photo-icon {
  position: relative;
  width: 12px;
  height: 9px;
  flex: 0 0 auto;
  border: 1.5px solid currentColor;
  border-radius: 2px;
}

.area-float-label-photo-icon::before {
  content: "";
  position: absolute;
  left: 1px;
  top: -3px;
  width: 5px;
  height: 2px;
  border: 1.5px solid currentColor;
  border-bottom: none;
  border-radius: 2px 2px 0 0;
}

.area-float-label-photo-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 3px;
  height: 3px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  transform: translate(-50%, -40%);
}

.area-float-label.left {
  left: -10px;
  transform: translate(-100%, -50%);
}

.area-float-label.right {
  left: calc(100% + 10px);
  transform: translate(0, -50%);
}

.area-float-label.selected,
.area-float-label.search-highlighted,
.area-float-label.hovered {
  z-index: 10;
  border-color: var(--area-selection-outline-color);
}

.resize-handle {
  position: absolute;
  width: 12px;
  height: 12px;
  right: var(--resize-handle-inset);
  bottom: var(--resize-handle-inset);
  border-radius: var(--resize-handle-corner-radius);
  background: color-mix(in srgb, var(--area-color), var(--area-color-dark-mix-base) 30%);
  cursor: nwse-resize;
}

.draft-area {
  position: absolute;
  border: 2px dashed var(--draft-outline-color);
  background: var(--draft-fill-color);
  pointer-events: none;
}

.draft-area.is-blocked {
  border-color: var(--draft-blocked-outline-color);
  background: var(--draft-blocked-fill-color);
}

.form-grid {
  display: grid;
  gap: var(--gap-7);
}

.form-grid label {
  display: grid;
  align-content: start;
  min-width: 0;
  gap: var(--gap-3);
  font-size: var(--text-small);
  font-weight: var(--weight-emphasis);
  color: var(--text-label-color);
}

.form-grid input {
  width: 100%;
  min-width: 0;
  height: var(--control-height);
  border: 0;
  border-radius: var(--surface-radius);
  padding: 6px 8px;
  background: var(--surface-elevated-color);
  color: var(--text-primary-color);
  font-weight: var(--weight-regular);
}

.form-grid textarea {
  width: 100%;
  border: 0;
  border-radius: var(--surface-radius);
  padding: 7px 8px;
  background: var(--surface-elevated-color);
  color: var(--text-primary-color);
  resize: vertical;
}

.form-grid-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--gap-6);
  align-items: stretch;
}

.form-left-column {
  display: grid;
  grid-template-rows: auto auto;
  gap: var(--gap-6);
  min-width: 0;
}

.form-left-controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap-4);
}

.form-left-controls input[type="color"] {
  width: 100%;
  height: var(--control-height);
  padding: var(--gap-1);
}

.form-grid label.form-description-column {
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
}

.form-grid label.form-description-column textarea {
  flex: 1 1 auto;
  min-height: var(--control-height);
}

.form-bottom-row {
  display: flex;
  align-items: flex-end;
  gap: var(--gap-5);
}

.form-bottom-row #delete-area-btn {
  margin-left: auto;
  flex: 0 0 auto;
  white-space: nowrap;
}

.side-view-panel {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--panel-gap);
  border: 0;
  border-radius: var(--surface-radius);
  background: var(--sub-panel-bg-color);
  min-height: 160px;
  /* Reserve space for the dimension labels outside the drawing. */
  padding: 0 0 30px;
}

.side-view-panel.empty {
  color: var(--text-muted-color);
  font-size: var(--text-body);
}

.side-view-visual-wrap {
  width: 100%;
  flex: 0 0 auto;
  display: flex;
  justify-content: center;
}

.side-view-visual-frame {
  position: relative;
  display: inline-block;
}

.side-view-visual {
  position: relative;
  --side-view-border-width: var(--gap-1);
  --side-view-gap-width: 1px;
  --side-view-corner-radius: var(--gap-6);
  --side-view-inner-corner-radius: var(--gap-5);
  --side-view-border-color: color-mix(in srgb, var(--area-color), var(--area-color-dark-mix-base) 30%);
  --side-view-cell-color: color-mix(in srgb, var(--area-color), var(--area-color-light-mix-base) 46%);
  border: var(--side-view-border-width) solid var(--side-view-border-color);
  border-radius: var(--side-view-corner-radius);
  background: var(--side-view-border-color);
  display: flex;
  flex-direction: row;
  gap: var(--side-view-gap-width);
  overflow: hidden;
}

.side-shelf-column {
  flex: 1 1 0;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: var(--side-view-gap-width);
}

.side-shelf-hotspot {
  flex: 1 1 0;
  min-width: 0;
  min-height: 0;
  appearance: none;
  border: 0;
  border-radius: 0;
  background: var(--side-view-cell-color);
  padding: 0;
  margin: 0;
  cursor: pointer;
}

.side-shelf-hotspot.active {
  outline: var(--side-view-border-width) solid var(--area-selection-outline-color);
  outline-offset: calc(-1 * var(--side-view-border-width));
  z-index: 1;
}

.side-shelf-hotspot.locked {
  background: color-mix(in srgb, var(--side-view-cell-color), var(--area-selection-outline-color) 14%);
}

.side-shelf-hotspot:focus-visible {
  outline: var(--side-view-border-width) solid var(--area-selection-outline-color);
  outline-offset: calc(-1 * var(--side-view-border-width));
  z-index: 1;
}

.side-shelf-hotspot.side-shelf-corner-top-left {
  border-top-left-radius: var(--side-view-inner-corner-radius);
}

.side-shelf-hotspot.side-shelf-corner-top-right {
  border-top-right-radius: var(--side-view-inner-corner-radius);
}

.side-shelf-hotspot.side-shelf-corner-bottom-left {
  border-bottom-left-radius: var(--side-view-inner-corner-radius);
}

.side-shelf-hotspot.side-shelf-corner-bottom-right {
  border-bottom-right-radius: var(--side-view-inner-corner-radius);
}

.side-view-dimension {
  position: absolute;
  color: var(--text-muted-color);
  font-size: var(--text-caption);
  line-height: 1;
  white-space: nowrap;
}

.side-view-dimension-height {
  top: 50%;
  left: 0;
  transform: translate(calc(-100% - 10px), -50%);
}

.side-view-dimension-width {
  left: 50%;
  top: 100%;
  transform: translate(-50%, 8px);
}

.shelf-editor,
.preview-layer-card {
  border: 0;
  border-radius: var(--surface-radius);
  background: var(--surface-elevated-color);
  padding: var(--info-card-inset);
  display: grid;
  gap: var(--info-card-inset);
}

.shelf-editor-title {
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--text-label-color);
}

.shelf-editor input,
.shelf-editor textarea {
  width: 100%;
  border: 0;
  border-radius: 0px;
  padding: var(--gap-3);
  background: var(--sub-panel-bg-color);
  color: var(--text-primary-color);
  font: inherit;
}

.shelf-editor textarea {
  resize: vertical;
}

.preview-layer-list {
  display: grid;
  grid-template-columns: repeat(var(--preview-layer-columns, 1), minmax(0, 1fr));
  gap: var(--info-content-gap);
}

.preview-layer-column {
  display: grid;
  min-width: 0;
  gap: var(--info-content-gap);
  align-content: start;
}

.preview-layer-card {
  appearance: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  min-width: 0;
  color: var(--text-primary-color);
}

.preview-layer-card:focus-visible {
  outline: 2px solid var(--area-selection-outline-color);
  outline-offset: -2px;
}

.preview-layer-card.selected {
    outline: 2px solid var(--area-selection-outline-color);
    outline-offset: -2px;
}

.preview-area-description {
  margin: 0;
  font-size: var(--text-content);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--text-primary-color), white 22%);
}

.preview-layer-text {
  margin: 0;
  font-size: var(--text-content);
  line-height: var(--leading-body);
  color: var(--text-primary-color);
}

.preview-area-description,
.preview-layer-text {
  overflow-wrap: anywhere;
}

.preview-layer-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap-4);
}

.preview-layer-label {
  flex: 1;
  min-width: 0;
  font-weight: var(--weight-emphasis);
  color: var(--text-primary-color);
}

.preview-photo-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--info-content-gap);
}

.preview-photo-thumb {
  --preview-photo-thumb-height: 234px;
  appearance: none;
  border: 0;
  border-radius: var(--surface-radius);
  background: var(--surface-elevated-color);
  color: var(--text-primary-color);
  overflow: hidden;
  padding: 0;
  cursor: pointer;
  text-align: left;
  display: grid;
  grid-template-rows: var(--preview-photo-thumb-height) auto;
  width: clamp(170px, calc(var(--preview-photo-thumb-height) * var(--thumb-ratio, 1.33)), 380px);
  max-width: 100%;
  min-width: 0;
  flex: 0 0 auto;
}

.preview-photo-thumb-image {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  justify-self: center;
  align-self: center;
  display: block;
  object-fit: contain;
  object-position: center center;
  background: var(--grid-scroll-surface-color);
}

.preview-photo-thumb-label {
  padding: 5px 6px;
  font-size: var(--text-caption);
  line-height: 1.2;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}

.photo-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-4);
}

.photo-group {
  display: grid;
  gap: var(--info-card-inset);
}

.photo-button-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-4);
}

.photo-view-button {
  min-height: 32px;
  padding: 6px 10px;
  overflow-wrap: anywhere;
}

.tag-field {
  display: grid;
}

.tag-manager {
  position: relative;
  display: grid;
  gap: var(--gap-3);
}

.tag-manager-label {
  font-size: var(--text-small);
  font-weight: var(--weight-emphasis);
  color: var(--text-label-color);
}

#selection-panel .info-section > h2,
#selection-tags .tag-manager-label {
  display: flex;
  align-items: center;
  gap: var(--info-content-gap);
  font: var(--weight-emphasis) var(--text-heading) / var(--leading-body) var(--font-ui);
  letter-spacing: normal;
  color: var(--text-primary-color);
}

#selection-panel .info-section > h2::after,
#selection-tags .tag-manager-label::after {
  content: "";
  flex: 1;
  min-width: 0;
  height: 2px;
  background: var(--surface-elevated-color);
}

.tag-chip-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--gap-3);
}

.tag-chip {
  border: 0;
  border-radius: 999px;
  padding: 2px 8px;
  font-size: var(--text-caption);
  line-height: 1.35;
  color: var(--text-primary-color);
  background: var(--button-bg-color);
}

.tag-add-button {
  width: var(--control-height);
  height: var(--control-height);
  flex: 0 0 var(--control-height);
  padding: 0;
  font-size: var(--text-heading);
}

.tag-popover {
  --surface-radius: var(--gap-4);
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  width: min(280px, 90vw);
  border: 0;
  border-radius: var(--popover-radius);
  background: var(--sub-panel-bg-color);
  padding: var(--popover-inset);
  display: none;
  gap: var(--gap-3);
  z-index: 30;
}

.tag-manager.popover-open .tag-popover {
  display: grid;
}

.tag-popover-input {
  width: 100%;
  border: 0;
  border-radius: var(--surface-radius);
  padding: 6px 8px;
  background: var(--surface-elevated-color);
  color: var(--text-primary-color);
  font: inherit;
}

.tag-suggestion-list {
  display: grid;
  gap: var(--gap-2);
  max-height: 150px;
  overflow: auto;
}

.tag-suggestion-button {
  justify-content: flex-start;
  text-align: left;
  overflow-wrap: anywhere;
}

.tag-popover-empty {
  color: var(--text-muted-color);
  font-size: var(--text-small);
}

.tag-popover-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--gap-3);
}

.tag-chip-empty {
  color: var(--text-muted-color);
  font-size: var(--text-small);
}

.popup-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: var(--gap-7);
  background: var(--popup-overlay-color);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.popup-overlay.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.popup-window {
  width: min(520px, 100%);
  max-height: calc(100dvh - 32px);
  border: 0;
  border-radius: var(--popup-radius);
  background: var(--popup-window-bg-color);
  padding: var(--popup-inset);
  display: grid;
  gap: var(--gap-5);
  overflow-x: hidden;
  overflow-y: auto;
}

.popup-title {
  margin: 0;
  font-size: var(--text-title);
  font-weight: var(--weight-emphasis);
  color: var(--text-primary-color);
}

.popup-description {
  margin: 0;
  color: var(--text-primary-color);
  line-height: 1.35;
}

.popup-custom-content {
  display: grid;
  gap: var(--gap-3);
}

.popup-input-field {
  display: grid;
  gap: var(--gap-2);
}

.popup-input-field label {
  font-size: var(--text-small);
  color: var(--text-muted-color);
}

.popup-input-field input {
  width: 100%;
  border: 0;
  border-radius: var(--surface-radius);
  background: var(--surface-elevated-color);
  color: var(--text-primary-color);
  padding: 7px 8px;
}

.upload-drop-zone {
  border: 0;
  border-radius: var(--surface-radius);
  background: var(--grid-scroll-surface-color);
  min-height: 130px;
  padding: var(--gap-6);
  display: grid;
  align-content: center;
  justify-items: center;
  text-align: center;
  gap: var(--gap-3);
  color: var(--text-primary-color);
}

.upload-drop-zone.is-dragover {
  border-color: var(--area-selection-outline-color);
  background: color-mix(in srgb, var(--grid-scroll-surface-color), var(--area-selection-outline-color) 8%);
}

.upload-drop-zone-title {
  margin: 0;
  font-size: var(--text-content);
  font-weight: var(--weight-emphasis);
}

.upload-drop-zone-subtitle {
  margin: 0;
  font-size: var(--text-caption);
  color: var(--text-muted-color);
}

.popup-image-slot {
  min-height: 120px;
  height: min(52dvh, 520px);
  max-height: 52dvh;
  border: 0;
  border-radius: var(--surface-radius);
  background: var(--grid-scroll-surface-color);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.popup-image-slot:not(.has-image) {
  display: none;
}

.popup-image {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  justify-self: center;
  align-self: center;
  object-fit: contain;
  object-position: center center;
  display: none;
}

.popup-image-slot.has-image .popup-image {
  display: block;
}

.popup-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--gap-4);
}

@media (max-width: 1120px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .grid-scroll-wrap {
    min-height: 420px;
  }

  .container-content {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .minimap {
    width: var(--minimap-width, 84px);
  }
}

/* Content roles stay explicit so tags, controls and empty states never inherit sans. */
.user-content {
  font-family: var(--font-content);
}

input.user-content,
textarea.user-content {
  font-family: var(--font-content);
  font-size: var(--text-content);
  font-weight: var(--weight-regular);
  line-height: var(--leading-body);
}

input::placeholder,
textarea::placeholder {
  font-family: var(--font-ui);
  font-size: var(--text-small);
}

.panel-header h2,
.info-section h2 {
  font-weight: var(--weight-emphasis);
}

.tag-manager,
.tag-chip,
.tag-popover {
  font-family: var(--font-ui);
}

@container (max-width: 560px) {
  .form-grid-top {
    grid-template-columns: minmax(0, 1fr);
  }

  .form-grid label.form-description-column textarea {
    min-height: 96px;
  }
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--area-selection-outline-color);
  outline-offset: 2px;
}

.search-panel {
  min-height: 0;
  overflow: hidden;
}

/* Keep focus rings inside controls at the search scroll boundaries. */
.search-panel :focus-visible {
  outline-offset: -2px;
}

.search-panel > .floor-item-search {
  height: 100%;
}

.search-panel[hidden],
.container-content.is-hidden {
  display: none;
}

.workspace.search-active .view-panel-header,
.info-panel-header[hidden] {
  display: none;
}

.info-panel-header .button-medium {
    flex: 0 0 auto;
}

.info-panel-header .button-medium[hidden] {
    display: none;
}

.preview-layer-card.search-match {
  background: var(--button-active-bg-color);
}

.search-results-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto minmax(0, 1fr);
  min-height: 0;
  gap: 12px 16px;
}

.search-results-layout.has-container-preview {
  grid-template-columns: minmax(0, 1fr) var(--search-preview-width, 22%);
}

.search-results-layout > .floor-search-results {
  grid-column: 1;
  grid-row: 2;
}

.search-results-layout > .floor-search-status,
.search-results-layout > .search-container-title {
  margin: 0;
  align-self: baseline;
}

.search-container-title {
  grid-column: 2;
  grid-row: 1;
  text-align: center;
}

.search-container-preview[hidden] {
  display: none;
}

.search-container-preview {
  grid-column: 2;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  pointer-events: none;
  user-select: none;
}

.search-container-preview svg {
  display: block;
  flex: 1;
  min-height: 0;
  width: 100%;
  height: 100%;
}

.search-container-surface {
  fill: var(--grid-surface-color);
}

.search-container-lines {
  fill: none;
  stroke: var(--grid-line-color);
  stroke-width: var(--grid-line-width);
}

.search-container-area {
  fill: var(--sub-panel-bg-color);
  stroke: var(--grid-line-color);
  stroke-width: 2px;
}

.search-container-area.selected {
  fill: color-mix(in srgb, var(--area-color), var(--area-color-light-mix-base) 46%);
  stroke: var(--area-selection-outline-color);
}