/* Nexus content-model diagram. */

:root {
  --bg: var(--sl-color-neutral-100);
  --panel-bg: var(--sl-color-neutral-0);
  --border: var(--sl-color-neutral-200);
  --text: var(--sl-color-neutral-900);
  --muted: var(--sl-color-neutral-500);
  --accent: var(--sl-color-primary-600);
  --surface: var(--sl-color-neutral-50);
  --surface-2: var(--sl-color-neutral-100);
  --grid: rgba(0, 0, 0, 0.035);
}

html.sl-theme-dark {
  --grid: rgba(255, 255, 255, 0.05);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

.toolbar {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* Row 1: brand and title on the left; GitHub, theme and settings on the right. */
.toolbar__brandline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* Row 2: the tool sections, always shown, wrapping between sections if they
   do not fit. */
.toolbar__tools {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.toolbar__section {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

/* The separator sits in this end padding, out of the controls' flex flow, so
   it never wraps onto a line of its own. The padding holds the gap, the
   separator's 2 margins and its 1px line. */
.toolbar__section:not(:last-child) {
  position: relative;
  padding-inline-end: calc(0.45rem + 0.25rem + 1px + 0.25rem);
}

/* Row 2: the edit palette - a single, non-wrapping row shown only in edit
   mode, scrolling horizontally if it overflows (ribbon-style). */
.toolbar__palette {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: nowrap;
  overflow-x: auto;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.toolbar__palette[hidden] {
  display: none;
}

.toolbar__palette .toolbar__button {
  flex: 0 0 auto;
}

.toolbar__palette-label {
  flex: 0 0 auto;
  padding-right: 0.15rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
}

.toolbar__palette-sep,
.toolbar__section:not(:last-child)::after {
  flex: 0 0 auto;
  width: 1px;
  height: 20px;
  margin: 0 0.25rem;
  background: var(--border);
}

.toolbar__section:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 50%;
  inset-inline-end: 0;
  transform: translateY(-50%);
}

/* The section keeps its end padding, so hiding the separator can't move the
   line break. */
.toolbar__section.is-line-end::after {
  visibility: hidden;
}

sl-input.toolbar__title {
  min-width: 170px;
}

sl-input.toolbar__title::part(base) {
  background: transparent;
  border-color: transparent;
  box-shadow: none;
}

sl-input.toolbar__title::part(input) {
  font-weight: 500;
}

sl-input.toolbar__title:hover::part(base) {
  border-color: var(--border);
}

sl-input.toolbar__title:focus-within::part(base) {
  border-color: var(--accent);
  background: var(--panel-bg);
}

/* Shoelace toolbar buttons: neutralise the generic host box (Shoelace draws
   the box on ::part(base)) and drive the active toggle state through the
   part. */
sl-button.toolbar__button {
  background: none;
  border: none;
  padding: 0;
}

sl-button.toolbar__button::part(base) {
  font-size: 0.82rem;
}

sl-button.toolbar__button.is-active::part(base) {
  background: var(--sl-color-primary-600);
  border-color: var(--sl-color-primary-600);
  color: #fff;
}

sl-button.toolbar__button svg.icon {
  margin-inline-end: 0.35rem;
}

sl-button.toolbar__button--icon svg.icon {
  margin: 0;
}

/* Nudge slot-injected icons to the optical centre of a Shoelace button: inside
   the inline label slot 'vertical-align: middle' lands ~1.5px low. */
sl-button svg.icon {
  transform: translateY(-1.5px);
}

sl-button-group.toolbar__group {
  background: none;
  padding: 0;
}

/* Shoelace wraps a dropdown's trigger in a block, so the trigger button sits
   on a text line 1px above the buttons beside it. */
sl-dropdown::part(trigger) {
  display: flex;
}

.loader {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background: var(--sl-color-neutral-50);
}

.loader[hidden] {
  display: none;
}

.loader__spinner {
  font-size: 2.6rem;
  --track-width: 4px;
  --indicator-color: var(--accent);
  --track-color: var(--border);
}

.loader__text {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

/* The shortcut view: a badge on each control, over the landing screen too.
   Pointer presses pass through to the page. */
.shortcut-hints {
  position: fixed;
  inset: 0;
  z-index: 70;
  overflow: hidden;
  pointer-events: none;
}

.shortcut-hints[hidden] {
  display: none;
}

.shortcut-hint {
  position: absolute;
  top: 0;
  left: 0;
  padding: 1px 5px;
  font-family: inherit;
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1.3;
  white-space: nowrap;
  color: var(--sl-color-neutral-0);
  background: var(--sl-color-neutral-900);
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

.shortcut-hint.is-disabled {
  opacity: 0.55;
}

.about p {
  margin: 0 0 0.85rem;
  line-height: 1.55;
}

.about p:last-child {
  margin-bottom: 0;
}

.about__version {
  color: var(--muted);
  font-size: 0.85rem;
}

.toolbar__actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

/* Segmented control: buttons grouped inside a soft pill. */
.toolbar__group {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px;
  background: var(--surface-2);
  border-radius: 9px;
}

sl-input.toolbar__search {
  min-width: 180px;
}

/* Find entity: the field and its button share 1 outline. The button overlaps
   the field's end border by 1px, so its start border is the divider. */
.toolbar__find {
  display: inline-flex;
  align-items: stretch;
}

.toolbar__find sl-input::part(base) {
  border-start-end-radius: 0;
  border-end-end-radius: 0;
}

.toolbar__find sl-button::part(base) {
  margin-inline-start: -1px;
  border-start-start-radius: 0;
  border-end-start-radius: 0;
}

/* The focused field's border draws over the button's start border. */
.toolbar__find sl-input:focus-within {
  position: relative;
  z-index: 1;
}

.toolbar__search-icon {
  display: inline-flex;
  color: var(--muted);
}

sl-button#zoom-level::part(base) {
  min-width: 4.1rem;
  justify-content: space-between;
}

.toolbar__button {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.7rem;
  font-size: 0.85rem;
  color: var(--text);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 7px;
  cursor: pointer;
  white-space: nowrap;
  line-height: 1.2;
}

.toolbar__button--icon {
  padding: 0.35rem 0.45rem;
}

.palette__symbol {
  display: inline-flex;
  flex: 0 0 auto;
}

.icon {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  vertical-align: middle;
}

.toolbar__button:hover {
  background: var(--panel-bg);
  color: var(--accent);
}

.toolbar__button.is-active {
  background: var(--accent);
  color: #fff;
}

/* Standalone buttons (outside a segmented group) keep an outline. */
.toolbar__actions > .toolbar__button {
  background: var(--panel-bg);
  border-color: var(--border);
}

.toolbar__actions > .toolbar__button:hover {
  border-color: var(--accent);
}

.toolbar__actions > .toolbar__button.is-active {
  border-color: var(--accent);
}

.stage {
  position: relative;
  display: flex;
  flex: 1 1 auto;
  min-height: 0;
}

/* A short status bar: the display switches and a live hover hint on the left,
   zoom controls on the right. It sits above the floating panels so its
   upward-opening zoom menu is not covered; the landing and loader overlays
   sit above it in turn. */
.statusbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 2px 0.7rem;
  background: var(--panel-bg);
  border-top: 1px solid var(--border);
  z-index: 40;
}

.statusbar__display {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex: 0 0 auto;
}

.statusbar__display sl-switch {
  --height: 0.85rem;
  --width: 1.5rem;
  --thumb-size: 0.65rem;
  font-size: 0.77rem;
  white-space: nowrap;
}

.statusbar__display sl-switch::part(label) {
  font-size: 0.77rem;
  color: var(--text);
}

.statusbar__hint,
.statusbar__tips {
  min-width: 0;
  color: var(--muted);
  font-size: 0.77rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.statusbar__hint {
  flex: 1 1 0;
}

.statusbar__tips {
  flex: 0 1 auto;
  text-align: center;
}

/* The tips fill the room the hint grows into, so a hovered control's
   description takes their place while it shows. */
.statusbar__hint:not(:empty) + .statusbar__tips {
  display: none;
}

.statusbar__zoom {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.1rem;
  flex: 1 1 0;
}

/* The switches and the zoom controls fill about 38rem between them, so a
   narrower window drops the hint and tips and moves the zoom controls to a
   second line. */
@media (max-width: 40rem) {
  .statusbar {
    flex-wrap: wrap;
  }

  .statusbar__hint,
  .statusbar__tips {
    display: none;
  }
}

.stage__canvas {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
}

/* Side rail: any number of pinned panels stack and scroll, and dragging the
   inner edge resizes the rail. Width is driven by the store, applied
   inline. */
.dock {
  position: relative;
  flex: 0 0 auto;
  background: var(--surface-2);
}

#dock-left {
  border-right: 1px solid var(--border);
}

#dock-right {
  border-left: 1px solid var(--border);
}

.dock__scroll {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  height: 100%;
  padding: 0.6rem;
  overflow-y: auto;
}

.dock__resize {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 8px;
  cursor: col-resize;
  z-index: 5;
}

.dock__resize:hover {
  background: rgba(47, 109, 179, 0.22);
}

.dock__resize--left {
  right: 0;
}

.dock__resize--right {
  left: 0;
}

/* Drop affordance while dragging a panel toward a side. */
.stage.drop-left::before,
.stage.drop-right::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 84px;
  background: rgba(47, 109, 179, 0.12);
  border: 2px dashed var(--accent);
  pointer-events: none;
  z-index: 6;
}

.stage.drop-left::before {
  left: 0;
}

.stage.drop-right::after {
  right: 0;
}

.cy {
  position: absolute;
  inset: 0;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 26px 26px;
}

.cy.is-panning {
  cursor: grabbing;
}

.captions {
  position: absolute;
  inset: 0;
  z-index: 2;
  overflow: hidden;
  pointer-events: none;
}

.caption {
  position: absolute;
  transform: translate(-50%, 0);
  padding: 0 3px;
  font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
  color: var(--muted);
  background: var(--surface-2);
  border-radius: 3px;
  white-space: nowrap;
}

/* A quiet sub-label inside the entity box. The box keeps its light pastel fill
   in both themes, so the colour is pinned (not themed) to stay legible on it. */
.caption--type {
  font-family: inherit;
  font-style: italic;
  font-weight: 400;
  color: rgba(31, 41, 51, 0.6);
  background: none;
}

/* Build-mode "+" field handles around a selected entity. */
.handles {
  position: absolute;
  inset: 0;
  z-index: 3;
  overflow: hidden;
  pointer-events: none;
}

.handles[hidden] {
  display: none;
}

/* The floating panels follow it in the canvas and share its z-index, so they
   draw over it. */
.mode-frame {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: none;
  border: 5px solid var(--frame-view, transparent);
  pointer-events: none;
}

.stage.has-frame .mode-frame {
  display: block;
}

.stage.has-frame[data-mode='edit'] .mode-frame {
  border-color: var(--frame-edit, transparent);
}

/* Note badges: the layer sets pointer-events: none so the canvas stays
   draggable. Each badge sets pointer-events: auto so it can be hovered and
   clicked. */
.notes {
  position: absolute;
  inset: 0;
  z-index: 4;
  overflow: hidden;
  pointer-events: none;
}

.note-badge {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  color: #fff;
  background: var(--accent);
  border: 1.5px solid var(--panel-bg);
  border-radius: 50%;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  pointer-events: auto;
}

.note-badge svg.icon {
  width: 62%;
  height: 62%;
}

.handle {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  padding: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  color: #fff;
  background: var(--accent);
  border: 2px solid #fff;
  border-radius: 50%;
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  pointer-events: auto;
}

.handle:hover {
  background: #1b6cc9;
}

/* Floating panels: entities, table, inspector, settings, legend. */
.panel {
  position: absolute;
  z-index: 4;
  display: flex;
  flex-direction: column;
  width: 320px;
  max-height: calc(100% - 2rem);
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.14);
  overflow: hidden;
}

.panel--wide {
  width: 560px;
  max-width: calc(100% - 2rem);
}

.panel--legend {
  width: 240px;
}

.panel[hidden] {
  display: none;
}

/* Docked into a side rail: static, fills the rail width, keeps a height
   resizable from the bottom edge and scrolls its body. */
.panel.is-docked {
  position: relative;
  flex: 0 0 auto;
  width: auto;
  max-width: none;
  max-height: none;
  min-height: 90px;
  box-shadow: none;
  border-radius: 8px;
}

.panel.is-docked .panel__body {
  padding-bottom: 10px;
}

/* The docked Inspector is sized to its form, so a scrollbar that narrowed the
   body would wrap the form taller than the panel. */
#inspector.is-docked .panel__body {
  scrollbar-gutter: stable;
}

.panel__vresize {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: row-resize;
  z-index: 3;
}

.panel__vresize::after {
  content: '';
  width: 34px;
  height: 3px;
  border-radius: 2px;
  background: var(--border);
}

.panel__vresize:hover::after {
  background: var(--accent);
}

.panel__body {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
}

.panel__toolbar {
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--border);
}

#inspector .panel__body {
  padding: 0.85rem 1rem;
}

.panel__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border);
  cursor: move;
  user-select: none;
}

.panel__grip {
  display: inline-flex;
  flex: 0 0 auto;
  margin-left: -0.3rem;
  color: var(--muted);
  cursor: grab;
}

.panel__grip:hover {
  color: var(--text);
}

.panel.is-dragging {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

body.is-dragging-panel,
body.is-dragging-panel * {
  cursor: grabbing !important;
}

.panel__title {
  font-weight: 600;
  font-size: 0.9rem;
}

.panel__spacer {
  flex: 1 1 auto;
}

.panel__search {
  flex: 1 1 auto;
  min-width: 60px;
}

.panel__select {
  flex: 0 0 auto;
  min-width: 120px;
}

.panel__pin,
.panel__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px;
  border: none;
  background: none;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
}

.panel__pin:hover,
.panel__close:hover {
  color: var(--text);
}

.panel__pin svg {
  transform: rotate(45deg);
  transition: transform 0.15s ease;
}

.panel.is-docked .panel__pin {
  color: var(--accent);
}

.panel.is-docked .panel__pin svg {
  transform: none;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.filters__item {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.45rem;
  font-size: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
}

.filters__item input {
  margin: 0;
}

.filters__swatch {
  width: 11px;
  height: 11px;
  border-radius: 3px;
  border: 1px solid rgba(0, 0, 0, 0.25);
}

.entity-list {
  overflow: auto;
  padding: 0.4rem;
}

.entity-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  width: 100%;
  padding: 0.4rem 0.5rem;
  border-radius: 7px;
}

.entity-row:hover {
  background: var(--surface-2);
}

.entity-row__name {
  flex: 1 1 auto;
  text-align: left;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text);
  padding: 0;
}

.entity-row__name b {
  font-weight: 600;
}

.entity-row__type {
  font-size: 0.72rem;
  color: var(--muted);
}

.entity-row__count {
  font-size: 0.72rem;
  color: var(--muted);
  min-width: 1.4rem;
  text-align: right;
}

.entity-row__fields {
  border: 1px solid var(--border);
  background: var(--panel-bg);
  border-radius: 6px;
  font-size: 0.72rem;
  padding: 0.15rem 0.4rem;
  cursor: pointer;
  color: var(--muted);
}

.entity-row__fields:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.table-wrap {
  overflow-x: hidden;
  overflow-y: auto;
}

.field-table {
  width: 100%;
  table-layout: fixed;
  border-collapse: collapse;
  font-size: 0.78rem;
}

.field-table th,
.field-table td {
  text-align: left;
  padding: 0.35rem 0.6rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  overflow-wrap: anywhere;
}

.field-table th:nth-child(1),
.field-table td:nth-child(1) {
  width: 27%;
}

.field-table th:nth-child(2),
.field-table td:nth-child(2) {
  width: 20%;
}

.field-table th:nth-child(3),
.field-table td:nth-child(3) {
  width: 11%;
}

.field-table th:nth-child(4),
.field-table td:nth-child(4) {
  width: 8%;
}

.field-table th:nth-child(5),
.field-table td:nth-child(5) {
  width: 20%;
}

.field-table th:nth-child(6),
.field-table td:nth-child(6),
.field-table th:nth-child(7),
.field-table td:nth-child(7) {
  width: 7%;
  padding-inline: 0;
  text-align: center;
}

.table__action {
  display: inline-flex;
  padding: 0.15rem;
  color: var(--muted);
  background: none;
  border: 0;
  border-radius: 4px;
  cursor: pointer;
}

.table__action:hover {
  color: var(--accent);
  background: var(--surface-2);
}

.table__action[aria-disabled='true'] {
  opacity: 0.35;
  cursor: default;
}

.table__action[aria-disabled='true']:hover {
  color: var(--muted);
  background: none;
}

.field-table .is-hidden-field td:not(.field-table__action) {
  opacity: 0.5;
}

.table__reflink {
  color: var(--accent);
  cursor: pointer;
  text-decoration: none;
}

.table__reflink:hover {
  text-decoration: underline;
}

.field-table th {
  position: sticky;
  top: 0;
  background: var(--surface);
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
}

.field-table code {
  font-size: 0.72rem;
  color: var(--muted);
}

.field-table tr:hover td {
  background: var(--surface);
}

.field-table .is-group td {
  background: var(--surface-2);
  font-weight: 600;
  color: var(--text);
}

.badge {
  display: inline-block;
  padding: 0.05rem 0.4rem;
  border-radius: 999px;
  font-size: 0.68rem;
  border: 1px solid var(--border);
  color: var(--muted);
  white-space: nowrap;
}

.badge--multi {
  border-color: var(--sl-color-neutral-700);
  color: var(--sl-color-neutral-700);
}

.badge--system {
  border-style: dashed;
}

.badge--calculated {
  background: #ffd966;
  border-color: #c9a227;
  color: #6a5410;
}

.legend-body {
  padding: 0.85rem 1rem;
  font-size: 0.8rem;
}

.legend__item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.2rem 0;
}

.legend__swatch {
  flex: 0 0 34px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.legend__label {
  line-height: 1.2;
}

/* History panel: 1 row per version, newest first. */
.history-list {
  margin: 0;
  padding: 0.4rem;
  list-style: none;
}

.history__version {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  width: 100%;
  padding: 0.4rem 0.55rem;
  font: inherit;
  font-size: 0.82rem;
  color: var(--text);
  text-align: left;
  background: none;
  border: 0;
  border-radius: 7px;
  cursor: pointer;
}

.history__version:hover {
  background: var(--surface-2);
}

/* The list rows sit flush in the panel, so the focus ring is drawn inside. */
.history__version:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.history__version.is-current {
  font-weight: 600;
  background: var(--surface-2);
  box-shadow: inset 3px 0 0 var(--accent);
}

.history__version.is-undone {
  font-style: italic;
  color: var(--muted);
}

.history__label {
  flex: 1 1 auto;
  min-width: 0;
  overflow-wrap: anywhere;
}

.history__time {
  flex: 0 0 auto;
  font-size: 0.72rem;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.history-note {
  margin: 0;
  padding: 0 0.95rem 0.75rem;
}

.tooltip {
  position: absolute;
  z-index: 6;
  max-width: 280px;
  padding: 0.5rem 0.65rem;
  font-size: 0.78rem;
  line-height: 1.35;
  color: #fff;
  background: rgba(24, 30, 38, 0.94);
  border-radius: 8px;
  pointer-events: none;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

.tooltip[hidden] {
  display: none;
}

.tooltip__note {
  white-space: pre-wrap;
  word-break: break-word;
}

/* Settings panel body. */
#settings .panel__body {
  padding: 0.9rem 1rem;
}

.settings-reset {
  margin-top: 0.9rem;
}

/* New diagrams: each setting on 1 line, its label on the left and its
   control on the right. A switch draws its label after the control, so its
   base is reversed. */
.diagram-defaults {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.type-add + .settings-section__title {
  margin-top: 1.1rem;
}

.default-row {
  display: block;
  font-size: 0.82rem;
}

.default-row::part(form-control) {
  display: grid;
  grid-template-columns: auto minmax(0, 12rem);
  justify-content: space-between;
  align-items: center;
  gap: 0.4rem;
}

.default-row::part(form-control-label) {
  margin: 0;
  font-size: 0.82rem;
}

.default-row--switch::part(base) {
  display: flex;
  flex-direction: row-reverse;
  justify-content: space-between;
}

.default-row--switch::part(label) {
  margin-inline-start: 0;
  font-size: 0.82rem;
}

.settings-reset svg.icon {
  margin-inline-end: 0.35rem;
}

.panel__note {
  margin: 0.6rem 0 0;
  font-size: 0.72rem;
  color: var(--muted);
}

.settings-section__title {
  margin: 0 0 0.6rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.settings-section__title--spaced {
  margin-top: 1.1rem;
}

.frame-settings {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 0.6rem;
}

.frame-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.4rem;
}

.color-settings {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.color-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.color-row__label {
  flex: 1 1 auto;
  font-size: 0.85rem;
}

.color-row input[type="color"] {
  width: 44px;
  height: 26px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: none;
  cursor: pointer;
}

.type-settings {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

/* Each type and the add form share 1 line of columns: label (or the 2 name
   inputs), color, symbol and the + or - button. */
.type-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto 1.875rem;
  align-items: center;
  gap: 0.4rem;
}

.type-row__label {
  font-size: 0.82rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.type-row__symbol {
  width: 4.5rem;
}

/* The picked symbol stands in for its name, which stays in the title. */
.type-row__symbol::part(display-input) {
  flex: 0 0 0;
  width: 0;
  min-width: 0;
  padding: 0;
  opacity: 0;
}

/* The list is wider than the select, so the option names fit on 1 line. */
.type-row__symbol::part(listbox) {
  width: 13.5rem;
}

.type-row__symbol.is-list-end::part(listbox) {
  margin-inline-start: calc(100% - 13.5rem);
}

.type-row__preview {
  display: inline-flex;
  align-items: center;
}

.type-row__action {
  grid-column: 4;
}

.type-row__action::part(base) {
  width: 1.875rem;
  padding: 0;
}

.type-row__action::part(label) {
  display: inline-flex;
  align-items: center;
  padding: 0;
}

.type-add {
  margin-top: 0.7rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--border);
}

.type-add__names {
  display: flex;
  gap: 0.4rem;
  min-width: 0;
}

/* In a narrow side rail the label or the name inputs take a line of their
   own above the controls. */
.settings-body.is-narrow .type-row {
  grid-template-columns: auto auto minmax(0, 1fr) 1.875rem;
}

.settings-body.is-narrow .type-row__label,
.settings-body.is-narrow .type-add__names {
  grid-column: 1 / -1;
}

.type-add__input {
  flex: 1 1 0;
  min-width: 0;
  padding: 0.3rem 0.45rem;
  font-size: 0.82rem;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
}

.tooltip__name {
  font-weight: 600;
}

.tooltip__meta {
  color: #b9c2cf;
}

/* Landing / upload screen. */
.landing {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  overflow-y: auto;
  padding: 1.5rem;
  background: var(--bg);
}

.landing[hidden] {
  display: none;
}

/* When the card is taller than the window, its auto margins drop to 0, so
   the overlay scrolls to its top instead of clipping it. */
.landing__card {
  position: relative;
  width: 940px;
  max-width: 100%;
  margin: auto;
  container-type: inline-size;
}

.landing__card::part(base) {
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.landing__card::part(body) {
  padding: 2rem;
  text-align: center;
}

.landing__corner {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  display: flex;
  gap: 0.45rem;
}

.landing__logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.25rem;
  font-size: 1.6rem;
  font-weight: 700;
}

.landing__logo .icon--nexus {
  width: 64px;
  height: 64px;
}

/* Below this width the corner buttons reach the centred mark, so the logo
   starts below them. */
@container (max-width: 18rem) {
  .landing__logo {
    margin-top: 1rem;
  }
}

.landing__version {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
}

.landing__tag {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

/* Your configuration beside the templates, stacking into 1 column when the
   card is too narrow for 2. */
.landing__columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: 1.75rem;
  text-align: left;
}

.landing__heading {
  margin: 0 0 0.6rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 15rem;
  padding: 2rem 1.5rem;
  border: 2px dashed var(--border);
  border-radius: 12px;
  text-align: center;
  transition: border-color 0.15s, background 0.15s;
}

.dropzone.is-drag {
  border-color: var(--accent);
  background: var(--sl-color-primary-100);
}

.dropzone__glyph {
  color: var(--sl-color-neutral-400);
  line-height: 0;
}

.dropzone__glyph .icon {
  width: 40px;
  height: 40px;
}

.dropzone__hint {
  margin: 0 0 0.4rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.dropzone__privacy {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.landing__actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 11rem), 1fr));
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.dropzone sl-button svg.icon,
.landing__actions sl-button svg.icon {
  margin-inline-end: 0.4rem;
}

.template-list {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.template-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  border: 0;
  border-top: 1px solid var(--border);
  background: var(--panel-bg);
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s;
}

.template-row:first-child {
  border-top: 0;
}

.template-row:hover {
  background: var(--surface);
}

/* The list clips its corners, so the focus ring is drawn inside the row. */
.template-row:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.template-row__mark {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: var(--template-color);
  color: #fff;
}

.template-row__mark .icon {
  width: 22px;
  height: 22px;
}

.template-row__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.template-row__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.template-row__name {
  font-size: 0.9rem;
  font-weight: 600;
}

.template-row__badge {
  padding: 1px 7px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--sl-color-neutral-600);
  font-size: 0.68rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  line-height: 1.5;
}

.template-row__summary {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.4;
}

.template-row__counts {
  color: var(--muted);
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
}

.template-row__go {
  flex: 0 0 auto;
  color: var(--sl-color-neutral-400);
  line-height: 0;
}

.template-row:hover .template-row__go {
  color: var(--accent);
}

.landing__more {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.74rem;
}

.landing__more a,
.landing__note a {
  color: var(--accent);
  text-decoration: none;
}

.landing__more a:hover,
.landing__note a:hover {
  text-decoration: underline;
}

/* Honour the hidden attribute on Shoelace buttons: the component sets its own
   host display, which would otherwise override the UA [hidden] rule. */
sl-button[hidden] {
  display: none;
}

.landing__note {
  margin-top: 1.5rem;
  font-size: 0.78rem;
  color: var(--muted);
}

.landing__error {
  margin-top: 1rem;
  text-align: left;
}

.toolbar__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
}

.toolbar__brand .icon--nexus {
  width: 20px;
  height: 20px;
}

.icon--nexus .ink {
  fill: #333e43;
}

.icon--nexus .ref {
  fill: #53b4eb;
}

html.sl-theme-dark .icon--nexus .ink {
  fill: #fff;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* Inspector (build mode). */
.panel--inspector {
  width: 320px;
}

.inspector-body {
  overflow: auto;
  padding: 0.85rem 1rem;
}

.insp__title {
  margin: 0 0 0.7rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.insp__row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.55rem;
}

.insp__row > label {
  flex: 0 0 92px;
  font-size: 0.8rem;
  color: var(--muted);
}

/* Shoelace inspector controls: full width in the form grid, and neutralise the
   native-button host boxes (styling is on ::part). */
.insp sl-input,
.insp sl-select,
.insp__note sl-textarea {
  width: 100%;
  /* A flex item's automatic minimum is its content width, which overflows a
     narrow Inspector once its body shows a scrollbar. */
  min-width: 0;
}

.insp__note {
  margin-bottom: 0.6rem;
}

.insp__note > label {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.insp sl-button.insp__create,
.insp sl-button.insp__delete {
  display: block;
  width: 100%;
  margin-top: 0.7rem;
  background: none;
  border: none;
  padding: 0;
}

.insp sl-button.insp__create::part(base),
.insp sl-button.insp__delete::part(base) {
  width: 100%;
}

.insp__reftag {
  margin: 0 0.3rem 0.35rem 0;
}

.insp__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.35rem 0.5rem;
  font-size: 0.85rem;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.insp__ro {
  font-size: 0.85rem;
}

.insp__section {
  margin: 0.8rem 0;
  padding-top: 0.7rem;
  border-top: 1px solid var(--border);
}

.insp__sectionhead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
}

.insp:focus {
  outline: none;
}

.insp__crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0 0 0.6rem;
  padding: 0;
  font-size: 0.78rem;
  list-style: none;
}

.insp__crumbs li {
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.insp__crumbs li + li::before {
  content: '›';
  margin: 0 0.35rem;
  color: var(--muted);
}

.insp__crumbs li[aria-current='page'] {
  color: var(--muted);
}

.insp__crumb {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  vertical-align: bottom;
  padding: 0;
  font: inherit;
  color: var(--accent);
  background: none;
  border: 0;
  cursor: pointer;
}

.insp__crumb:hover,
.insp__crumb:focus-visible {
  text-decoration: underline;
}

.insp__actions {
  display: inline-flex;
  gap: 0.3rem;
}

.insp__bulktext {
  width: 100%;
}

.insp__bulktext::part(textarea) {
  font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
  font-size: 0.75rem;
  white-space: pre;
}

.insp__bulktext::part(form-control-label) {
  font-size: 0.78rem;
}

.insp__bulktext::part(form-control-help-text) {
  font-size: 0.72rem;
  color: var(--muted);
}

.insp__bulk {
  margin: 0.5rem 0 0;
  padding: 0;
  list-style: none;
}

.insp__bulkline {
  padding: 0.25rem 0;
  font-size: 0.8rem;
  border-bottom: 1px solid var(--border);
}

.insp__bulkline code {
  font-size: 0.72rem;
  color: var(--muted);
}

.insp__bulkline.is-error {
  color: var(--sl-color-danger-600);
}

.insp__bulkdetails {
  display: block;
  font-size: 0.72rem;
  color: var(--muted);
}

.insp__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

.insp__btn .icon,
.insp__x .icon {
  width: 14px;
  height: 14px;
}

.insp__field {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.35rem 0.5rem;
  margin-bottom: 0.25rem;
  font-size: 0.82rem;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

.insp__field:hover {
  border-color: var(--accent);
}

.insp__field code,
.insp__row code {
  font-size: 0.72rem;
  color: var(--muted);
}

.insp__empty {
  margin: 0.2rem 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.insp__hint {
  margin: 0.5rem 0 0;
  font-size: 0.72rem;
  color: var(--muted);
}

.insp__ref {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.3rem 0.5rem;
  margin-bottom: 0.25rem;
  font-size: 0.82rem;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.insp__x {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.15rem 0.3rem;
  line-height: 1;
  color: var(--muted);
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

.insp__create {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.5rem;
  font-size: 0.85rem;
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  cursor: pointer;
}

.insp__delete {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  width: 100%;
  margin-top: 0.9rem;
  padding: 0.45rem;
  font-size: 0.82rem;
  color: #b3261e;
  background: var(--panel-bg);
  border: 1px solid #f0c6c2;
  border-radius: 6px;
  cursor: pointer;
}

.insp__delete:hover {
  background: #fdf1f0;
}