/* Drill-down diagrams and model browser (4.11). Colours come from the theme tokens. */

/* Model browser (6.5): a quiet tree like Polarion's or EA's project browser. Each section of the
   model has its own colour family; rows take it for their icons, section headers wear it as a
   soft gradient with a coloured edge. Rows are flat, guide lines show the depth. */
#model-browser {
  --mb-hue: var(--scs-accent);
  --mb-tint: var(--scs-accent-soft);
  position: relative;
  width: var(--model-browser-width, 296px);
  flex: 0 0 var(--model-browser-width, 296px);
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 10px 8px;
  background: var(--scs-surface);
  border-right: 1px solid var(--scs-line);
  color: var(--scs-ink);
  overflow: hidden;
}
#model-browser[hidden] {
  display: none;
}
#model-browser.is-resizing {
  user-select: none;
}
#model-browser [data-tone='logical'] {
  --mb-hue: #0e7280;
  --mb-tint: #dff0f1;
}
#model-browser [data-tone='physical'] {
  --mb-hue: #2d64a3;
  --mb-tint: #e2ecf7;
}
#model-browser [data-tone='systems'] {
  --mb-hue: #4f55b8;
  --mb-tint: #e8e9f8;
}
#model-browser [data-tone='functions'] {
  --mb-hue: #2b7a4b;
  --mb-tint: #e1f1e7;
}
#model-browser [data-tone='interfaces'] {
  --mb-hue: #a5640f;
  --mb-tint: #f8ecd9;
}
#model-browser [data-tone='requirements'] {
  --mb-hue: #b03a5b;
  --mb-tint: #f8e3e9;
}
#model-browser [data-tone='diagrams'] {
  --mb-hue: #7347ad;
  --mb-tint: #eee6f8;
}
html[data-theme='dark'] #model-browser [data-tone='logical'] {
  --mb-hue: #5cc3cb;
  --mb-tint: #173d44;
}
html[data-theme='dark'] #model-browser [data-tone='physical'] {
  --mb-hue: #7fb0e8;
  --mb-tint: #1b324b;
}
html[data-theme='dark'] #model-browser [data-tone='systems'] {
  --mb-hue: #a3a7f0;
  --mb-tint: #272a4d;
}
html[data-theme='dark'] #model-browser [data-tone='functions'] {
  --mb-hue: #75cf97;
  --mb-tint: #183a28;
}
html[data-theme='dark'] #model-browser [data-tone='interfaces'] {
  --mb-hue: #e7b062;
  --mb-tint: #3d2c14;
}
html[data-theme='dark'] #model-browser [data-tone='requirements'] {
  --mb-hue: #ee8ea9;
  --mb-tint: #44202c;
}
html[data-theme='dark'] #model-browser [data-tone='diagrams'] {
  --mb-hue: #bc9cf0;
  --mb-tint: #33264a;
}

.model-browser-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 0 2px;
}
.model-browser-head h2 {
  margin: 0;
  font-size: 15px;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.model-browser-tools {
  display: flex;
  gap: 2px;
}
html:root #model-browser .model-browser-tools button {
  width: 28px;
  height: 28px;
  min-height: 28px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--scs-ink-3);
}
html:root #model-browser .model-browser-tools button:hover {
  background: var(--scs-surface-2);
  border-color: var(--scs-line);
  color: var(--scs-ink);
}
.model-browser-modes {
  display: flex;
  gap: 2px;
  padding: 3px;
  background: var(--scs-surface-2);
  border: 1px solid var(--scs-line);
  border-radius: 8px;
}
html:root #model-browser .model-browser-modes button {
  flex: 1;
  min-width: 0;
  min-height: 26px;
  padding: 2px 4px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--scs-ink-2);
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
html:root #model-browser .model-browser-modes button:hover:not(.active) {
  color: var(--scs-ink);
}
html:root #model-browser .model-browser-modes button.active {
  background: var(--scs-surface);
  box-shadow:
    0 1px 2px #18384f1f,
    inset 0 -2px 0 var(--scs-accent);
  color: var(--scs-ink);
  font-weight: 600;
}
.model-browser-find {
  position: relative;
  display: flex;
  align-items: center;
}
.model-browser-find-icon {
  position: absolute;
  left: 9px;
  display: inline-flex;
  color: var(--scs-ink-3);
  pointer-events: none;
}
html:root #model-browser .model-browser-search {
  width: 100%;
  min-height: 32px;
  padding-left: 30px;
  padding-right: 70px;
  font-size: 12.5px;
}
html:root #model-browser .model-browser-search::-webkit-search-cancel-button {
  display: none;
}
html:root #model-browser .model-browser-clear {
  position: absolute;
  right: 4px;
  width: 24px;
  height: 24px;
  min-height: 0;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--scs-ink-3);
}
html:root #model-browser .model-browser-clear:hover {
  background: var(--scs-surface-2);
  color: var(--scs-ink);
}
.model-browser-hits {
  position: absolute;
  right: 32px;
  font-size: 11px;
  color: var(--scs-ink-3);
  pointer-events: none;
}
.model-browser-tree,
.model-browser-tree ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.model-browser-tree {
  flex: 1;
  overflow: auto;
  min-height: 0;
  margin: 0 -4px;
  padding: 0 4px 8px;
  scrollbar-width: thin;
}
/* Guide line per level, under the chevron of the parent. */
.model-browser-tree ul[role='group'] {
  position: relative;
}
.model-browser-tree ul[role='group']::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 6px;
  left: calc(var(--guide, 0) * 16px + 8px);
  border-left: 1px solid var(--scs-line);
}
.model-browser-item > .model-browser-row + ul {
  --guide: 0;
}
.model-browser-item .model-browser-item > .model-browser-row + ul {
  --guide: 1;
}
.model-browser-item .model-browser-item .model-browser-item > .model-browser-row + ul {
  --guide: 2;
}
.model-browser-item .model-browser-item .model-browser-item .model-browser-item > .model-browser-row + ul {
  --guide: 3;
}
.model-browser-item
  .model-browser-item
  .model-browser-item
  .model-browser-item
  .model-browser-item
  > .model-browser-row
  + ul {
  --guide: 4;
}
.model-browser-item.is-heading > .model-browser-row + ul::before {
  display: none;
}
.model-browser-row {
  display: flex;
  align-items: center;
  padding-left: calc(var(--depth) * 16px);
}
html:root #model-browser .model-browser-toggle {
  flex: 0 0 18px;
  width: 18px;
  height: 24px;
  min-height: 0;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--scs-ink-3);
  cursor: pointer;
}
html:root #model-browser button.model-browser-toggle:hover {
  color: var(--scs-ink);
  background: var(--scs-surface-2);
}
.model-browser-toggle svg {
  transition: transform 0.12s ease;
}
.model-browser-toggle.is-open svg {
  transform: rotate(90deg);
}
html:root #model-browser .model-browser-open {
  position: relative;
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 7px;
  height: auto;
  min-height: 26px;
  padding: 2px 6px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--scs-ink);
  font-size: 12.5px;
  font-weight: 400;
  text-align: left;
  cursor: pointer;
  box-shadow: none;
}
html:root #model-browser .model-browser-open:hover {
  background: var(--scs-surface-2);
}
html:root #model-browser .model-browser-open:focus-visible {
  outline: 2px solid var(--scs-accent);
  outline-offset: -2px;
}
html:root #model-browser .model-browser-item.is-current > .model-browser-row > .model-browser-open {
  background: linear-gradient(90deg, var(--mb-tint), var(--scs-surface) 92%);
  font-weight: 600;
}
html:root #model-browser .model-browser-item.is-current > .model-browser-row > .model-browser-open::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  border-radius: 2px;
  background: var(--mb-hue);
}
.model-browser-label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.model-browser-label mark {
  padding: 0;
  border-radius: 2px;
  background: #ffe28a;
  color: inherit;
}
html[data-theme='dark'] .model-browser-label mark {
  background: #7a5d12;
}
.model-browser-icon {
  display: inline-flex;
  flex: 0 0 auto;
  color: var(--mb-hue);
}
.model-browser-icon svg,
.model-browser-icon .navigation-icon {
  width: 15px;
  height: 15px;
}
.model-browser-count {
  flex: 0 0 auto;
  min-width: 18px;
  padding: 0 5px;
  border-radius: 9px;
  font-size: 10.5px;
  line-height: 16px;
  text-align: center;
  color: var(--scs-ink-3);
  background: var(--scs-surface-2);
  font-variant-numeric: tabular-nums;
}
/* Section headers: tinted band with the section colour, sticky while its rows scroll by. */
.model-browser-item.is-heading {
  margin-top: 6px;
}
.model-browser-tree > .model-browser-item.is-heading:first-child {
  margin-top: 0;
}
.model-browser-item.is-heading > .model-browser-row {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--scs-surface);
}
html:root #model-browser .model-browser-item.is-heading > .model-browser-row > .model-browser-open {
  min-height: 30px;
  padding-left: 8px;
  border-left: 3px solid var(--mb-hue);
  border-radius: 4px 7px 7px 4px;
  background: linear-gradient(110deg, var(--mb-tint), var(--scs-surface) 85%);
  font-weight: 650;
  font-size: 12.5px;
}
html:root #model-browser .model-browser-item.is-heading > .model-browser-row > .model-browser-open:hover {
  background: linear-gradient(110deg, var(--mb-tint), var(--mb-tint) 30%, var(--scs-surface));
}
.model-browser-item.is-heading > .model-browser-row > .model-browser-open .model-browser-count {
  background: var(--scs-surface);
  color: var(--mb-hue);
  font-weight: 650;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--mb-hue) 30%, transparent);
}
/* Diagram groups inside "Diagramme": a lighter sub-header. */
html:root #model-browser .model-browser-item.kind-section:not(.is-heading) > .model-browser-row > .model-browser-open {
  font-weight: 600;
  color: var(--scs-ink-2);
}
.model-browser-star {
  color: #c28a00;
  font-size: 11px;
}
html[data-theme='dark'] .model-browser-star {
  color: #f0c24f;
}
.model-browser-empty {
  padding: 18px 10px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--scs-ink-3);
}
.model-browser-hint {
  margin: 0;
  padding: 6px 4px 0;
  border-top: 1px solid var(--scs-line);
  font-size: 11px;
  line-height: 1.45;
  color: var(--scs-ink-3);
}
.model-browser-resize {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 7px;
  cursor: col-resize;
  z-index: 3;
}
.model-browser-resize:hover,
.model-browser-resize:focus-visible,
#model-browser.is-resizing .model-browser-resize {
  outline: none;
  background: linear-gradient(90deg, transparent 2px, var(--scs-accent) 2px, var(--scs-accent) 4px, transparent 4px);
}
/* Row actions: anchor and "Rechts daneben öffnen", shown on hover and focus. */
.model-browser-actions {
  display: none;
  flex: 0 0 auto;
  align-items: center;
  gap: 1px;
  padding-left: 2px;
}
.model-browser-row:is(:hover, :focus-within) > .model-browser-actions,
.model-browser-actions:has(.link-anchor[aria-pressed='true']) {
  display: inline-flex;
}
.model-browser-actions:has(.link-anchor[aria-pressed='true']) .model-browser-beside {
  display: none;
}
.model-browser-row:is(:hover, :focus-within) > .model-browser-actions .model-browser-beside {
  display: inline-flex;
}
html:root #model-browser .model-browser-beside {
  width: 24px;
  height: 22px;
  min-height: 0;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
  color: var(--scs-ink-3);
}
html:root #model-browser .model-browser-beside:hover {
  border-color: var(--scs-line);
  background: var(--scs-surface);
  color: var(--scs-accent);
}
#model-browser-toggle.active {
  background: var(--scs-accent-soft);
  border-color: var(--scs-accent-line);
}
@media (prefers-reduced-motion: reduce) {
  .model-browser-toggle svg {
    transition: none;
  }
}

/* Diagram heading: the element the diagram belongs to and the way up. */
#view-title-owner {
  min-width: 0;
  flex: 0 1 auto;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: 10px;
  font-size: 12px;
  color: var(--scs-ink-3);
  white-space: nowrap;
}
#view-title-owner button {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 24px;
  padding: 1px 8px;
  border: 1px solid var(--scs-line);
  border-radius: 12px;
  background: var(--scs-surface);
  color: var(--scs-ink-2);
  font-size: 12px;
}
#view-title-owner button:hover {
  border-color: var(--scs-accent-line);
  color: var(--scs-ink);
}
#view-title-owner button > span {
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
}
#view-title-owner button {
  max-width: 220px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
#view-title-owner svg {
  width: 13px;
  height: 13px;
}

/* Object page card and dialog. */
.drilldown-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}
.drilldown-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.drilldown-list .link-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.drilldown-list .navigation-icon,
.drilldown-kind .navigation-icon {
  width: 15px;
  height: 15px;
}
.drilldown-badge {
  padding: 1px 7px;
  border: 1px solid var(--scs-accent-line);
  border-radius: 10px;
  background: var(--scs-accent-soft);
  color: var(--scs-ink);
  font-size: 11px;
}
.drilldown-table {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0 12px;
}
.drilldown-table th,
.drilldown-table td {
  padding: 5px 6px;
  border-bottom: 1px solid var(--scs-line);
  text-align: left;
  font-size: 12.5px;
  vertical-align: middle;
}
.drilldown-kind {
  display: inline-flex;
  margin-right: 6px;
  vertical-align: middle;
}
.drilldown-add,
.drilldown-legacy {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 10px 0;
  padding: 8px 12px 10px;
  border: 1px solid var(--scs-line);
  border-radius: 8px;
}
.drilldown-add label,
.drilldown-legacy label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
}
.drilldown-legacy label {
  flex-direction: row;
  align-items: center;
}
.drilldown-flag {
  display: flex;
  align-items: center;
  gap: 6px;
}
.drilldown-remove {
  white-space: nowrap;
  font-size: 12px;
}
[data-drilldown-edit],
#drilldown-assign,
#drilldown-open {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Quick view (4.13): a single click on an element in the preview. */
.model-peek {
  position: fixed;
  z-index: 60;
  width: 300px;
  max-width: calc(100vw - 16px);
  max-height: min(420px, calc(100vh - 16px));
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 12px;
  background: var(--scs-surface);
  color: var(--scs-ink);
  border: 1px solid var(--scs-line);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgb(0 0 0 / 18%);
  font-size: 13px;
}
.model-peek header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  column-gap: 8px;
}
.model-peek header strong {
  grid-column: 1;
  font-size: 14px;
  overflow-wrap: anywhere;
}
.model-peek header .icon-button {
  grid-column: 2;
  grid-row: 1 / span 2;
}
.model-peek-kind {
  grid-column: 1;
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--scs-ink-2);
}
.model-peek h4 {
  margin: 0 0 4px;
  font-size: 12px;
  color: var(--scs-ink-2);
  font-weight: 600;
}
.model-peek ul {
  margin: 0;
  padding-left: 16px;
}
.model-peek p {
  margin: 0;
}
.model-peek footer {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.object-parts {
  margin: 0;
  padding-left: 18px;
}

/* Context menu of an element in the preview (4.13.1): links that open a new tab. */
.model-link-menu {
  position: fixed;
  z-index: 61;
  min-width: 220px;
  max-width: min(360px, calc(100vw - 16px));
  display: flex;
  flex-direction: column;
  padding: 4px;
  background: var(--scs-surface);
  color: var(--scs-ink);
  border: 1px solid var(--scs-line);
  border-radius: 8px;
  box-shadow: var(--scs-shadow-pop, 0 8px 24px rgb(0 0 0 / 18%));
  font-size: 13px;
}
.model-link-menu a,
.model-link-menu button {
  display: flex;
  width: 100%;
  border: 0;
  background: none;
  font: inherit;
  text-align: left;
  cursor: pointer;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 6px;
  color: inherit;
  text-decoration: none;
}
.model-link-menu a svg,
.model-link-menu button svg {
  flex: none;
  margin-top: 2px;
  color: var(--scs-accent);
}
.model-link-menu a span,
.model-link-menu button span {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.model-link-menu a small,
.model-link-menu button small {
  color: var(--scs-ink-2, inherit);
  opacity: 0.8;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.model-link-menu a:hover,
.model-link-menu a:focus-visible,
.model-link-menu button:hover,
.model-link-menu button:focus-visible {
  background: var(--scs-row-hover);
  outline: none;
}