/* Relationship Explorer — read-only pathfinding, perspective and structure lab. */

:root[data-theme="midnight"] #explorerWorkspace {
  --explorer-route: oklch(0.79 0.1 251);
  --explorer-radar: oklch(0.77 0.11 166);
  --explorer-bridge: oklch(0.8 0.11 78);
  --explorer-wash: oklch(0.55 0.12 251 / 0.12);
}

:root[data-theme="paper"] #explorerWorkspace {
  --explorer-route: oklch(0.49 0.13 251);
  --explorer-radar: oklch(0.43 0.11 158);
  --explorer-bridge: oklch(0.5 0.12 67);
  --explorer-wash: oklch(0.49 0.13 251 / 0.08);
}

:root[data-theme="umber"] #explorerWorkspace {
  --explorer-route: oklch(0.79 0.125 68);
  --explorer-radar: oklch(0.75 0.09 145);
  --explorer-bridge: oklch(0.79 0.13 45);
  --explorer-wash: oklch(0.72 0.12 68 / 0.12);
}

:root[data-theme="moss"] #explorerWorkspace {
  --explorer-route: oklch(0.78 0.11 151);
  --explorer-radar: oklch(0.73 0.1 205);
  --explorer-bridge: oklch(0.8 0.105 82);
  --explorer-wash: oklch(0.7 0.1 151 / 0.11);
}

:root[data-theme="ink"] #explorerWorkspace {
  --explorer-route: oklch(0.3 0.035 245);
  --explorer-radar: oklch(0.4 0.09 155);
  --explorer-bridge: oklch(0.46 0.17 25);
  --explorer-wash: oklch(0.3 0.035 245 / 0.07);
}

:root[data-theme="vermilion"] #explorerWorkspace {
  --explorer-route: oklch(0.76 0.14 75);
  --explorer-radar: oklch(0.7 0.1 145);
  --explorer-bridge: oklch(0.7 0.17 28);
  --explorer-wash: oklch(0.58 0.16 28 / 0.12);
}

:root[data-theme="celadon"] #explorerWorkspace {
  --explorer-route: oklch(0.42 0.09 166);
  --explorer-radar: oklch(0.48 0.1 205);
  --explorer-bridge: oklch(0.5 0.12 67);
  --explorer-wash: oklch(0.42 0.09 166 / 0.08);
}

:root[data-theme="dunhuang"] #explorerWorkspace {
  --explorer-route: var(--accent);
  --explorer-radar: var(--positive);
  --explorer-bridge: var(--danger);
  --explorer-wash: oklch(0.55 0.14 55 / 0.13);
}

.workspace-lenses.explorer-lenses-ready {
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-width: none;
  scroll-snap-type: inline proximity;
}

.workspace-lenses.explorer-lenses-ready::-webkit-scrollbar {
  display: none;
}

.workspace-lenses.explorer-lenses-ready .workspace-lens {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

#explorerWorkspace {
  position: relative;
  isolation: isolate;
  background:
    radial-gradient(circle at 8% 0%, var(--explorer-wash), transparent 30%),
    radial-gradient(circle at 92% 32%, color-mix(in oklch, var(--explorer-radar) 8%, transparent), transparent 28%),
    var(--surface-base);
}

#explorerWorkspace::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  background-image:
    linear-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size: 48px 48px;
  content: "";
  mask-image: linear-gradient(to bottom, black, transparent 58%);
  opacity: 0.22;
  pointer-events: none;
}

.explorer-header {
  align-items: center;
}

.explorer-readonly-badge {
  display: inline-flex;
  align-items: center;
  min-width: 170px;
  min-height: 52px;
  padding: 8px 12px;
  color: var(--fg-secondary);
  background: var(--positive-soft);
  border: 1px solid color-mix(in oklch, var(--positive) 34%, var(--border-subtle));
  border-radius: 10px;
  gap: 9px;
}

.explorer-readonly-badge svg {
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  fill: none;
  stroke: var(--positive);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.explorer-readonly-badge span {
  display: grid;
  gap: 2px;
}

.explorer-readonly-badge strong {
  color: var(--fg-primary);
  font-size: 12px;
}

.explorer-readonly-badge small {
  color: var(--fg-muted);
  font-size: 9px;
}

.explorer-shell {
  max-width: 1240px;
  margin: 0 auto;
}

.explorer-filter-bar {
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) minmax(430px, 1.28fr);
  align-items: center;
  margin-bottom: 12px;
  padding: 14px 16px;
  background: color-mix(in oklch, var(--surface-panel) 92%, transparent);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  box-shadow: 0 12px 34px color-mix(in oklch, var(--shadow-color) 55%, transparent);
  gap: 16px;
}

.explorer-filter-copy {
  min-width: 0;
}

.explorer-filter-copy h3 {
  margin: 3px 0 3px;
  font-family: var(--font-display);
  font-size: 17px;
}

.explorer-filter-copy p,
.explorer-card-head p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 10px;
  line-height: 1.55;
}

.explorer-type-filter {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  min-width: 0;
  padding: 0;
  border: 0;
  gap: 7px;
}

.explorer-type-option {
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 44px;
  cursor: pointer;
}

.explorer-type-option input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.explorer-type-option > span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 44px;
  padding: 6px 8px;
  color: var(--fg-muted);
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  font-size: 10px;
  text-align: center;
  gap: 6px;
  transition:
    color 150ms var(--ease-workspace),
    background-color 150ms var(--ease-workspace),
    border-color 150ms var(--ease-workspace),
    transform 90ms var(--ease-workspace);
}

.explorer-type-option svg {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.explorer-type-option small {
  color: inherit;
  font-size: 8px;
  opacity: 0.72;
}

.explorer-type-option:hover > span {
  color: var(--fg-primary);
  background: var(--surface-hover);
  border-color: var(--border-default);
}

.explorer-type-option input:checked + span {
  color: var(--accent-text);
  background: var(--accent-soft);
  border-color: color-mix(in oklch, var(--accent) 55%, var(--border-default));
}

.explorer-event-option input:checked + span {
  color: var(--explorer-radar);
  background: color-mix(in oklch, var(--explorer-radar) 12%, var(--surface-raised));
  border-color: color-mix(in oklch, var(--explorer-radar) 52%, var(--border-default));
}

.explorer-type-option input:focus-visible + span {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.explorer-type-option:active > span {
  transform: scale(0.97);
}

.explorer-filter-summary {
  grid-column: 1 / -1;
  margin: -4px 2px 0;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 9px;
}

.explorer-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 12px;
  gap: 8px;
}

.explorer-metrics article {
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 90px;
  padding: 13px 14px;
  overflow: hidden;
  align-content: space-between;
  background: var(--surface-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  gap: 2px;
}

.explorer-metrics article::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: var(--explorer-route);
  content: "";
  opacity: 0.8;
}

.explorer-metrics article:nth-child(3)::before {
  background: var(--explorer-radar);
}

.explorer-metrics article:nth-child(4)::before {
  background: var(--explorer-bridge);
}

.explorer-metrics span,
.explorer-metrics small {
  overflow: hidden;
  color: var(--fg-muted);
  font-size: 9px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.explorer-metrics span {
  font-family: var(--font-mono);
  letter-spacing: 0.07em;
}

.explorer-metrics strong {
  color: var(--fg-primary);
  font-family: var(--font-display);
  font-size: 27px;
  line-height: 1;
}

.explorer-grid {
  display: grid;
  grid-template-columns: minmax(300px, 0.85fr) minmax(440px, 1.15fr);
  gap: 12px;
}

.explorer-card {
  position: relative;
  min-width: 0;
  padding: 18px;
  overflow: hidden;
  background: color-mix(in oklch, var(--surface-panel) 96%, transparent);
  border: 1px solid var(--border-subtle);
  border-radius: 13px;
  box-shadow: 0 15px 42px color-mix(in oklch, var(--shadow-color) 42%, transparent);
}

.explorer-card::after {
  position: absolute;
  top: -58px;
  right: -58px;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, var(--explorer-wash), transparent 68%);
  content: "";
  pointer-events: none;
}

.explorer-path-card,
.explorer-structure-card {
  grid-column: 1 / -1;
}

.explorer-card-head {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: start;
  justify-content: space-between;
  margin-bottom: 15px;
  gap: 14px;
}

.explorer-card-head > div {
  min-width: 0;
}

.explorer-card-index {
  display: inline-grid;
  width: 28px;
  height: 28px;
  margin-right: 7px;
  place-items: center;
  color: var(--fg-muted);
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 9px;
}

.explorer-card-head h3 {
  margin: 5px 0 4px;
  font-family: var(--font-display);
  font-size: 23px;
}

.explorer-result-badge {
  min-height: 28px;
  padding: 6px 9px;
  color: var(--explorer-route);
  background: color-mix(in oklch, var(--explorer-route) 11%, var(--surface-raised));
  border: 1px solid color-mix(in oklch, var(--explorer-route) 34%, var(--border-subtle));
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 9px;
  white-space: nowrap;
}

.explorer-path-controls,
.explorer-perspective-controls {
  display: grid;
  align-items: end;
  margin-bottom: 14px;
  gap: 8px;
}

.explorer-path-controls {
  grid-template-columns: minmax(160px, 1fr) auto minmax(160px, 1fr);
}

.explorer-perspective-controls {
  grid-template-columns: minmax(150px, 1fr) minmax(140px, 0.7fr);
}

.explorer-path-controls label,
.explorer-perspective-controls label {
  display: grid;
  min-width: 0;
  color: var(--fg-muted);
  font-size: 9px;
  gap: 5px;
}

.explorer-path-controls select,
.explorer-perspective-controls select {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  padding: 0 34px 0 11px;
  color: var(--fg-primary);
  background: var(--surface-raised);
  border: 1px solid var(--border-default);
  border-radius: 8px;
}

.explorer-swap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 82px;
  min-height: 44px;
  padding: 0 11px;
  color: var(--fg-secondary);
  background: var(--surface-control);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  gap: 6px;
  transition:
    color 150ms var(--ease-workspace),
    background-color 150ms var(--ease-workspace),
    border-color 150ms var(--ease-workspace),
    transform 90ms var(--ease-workspace);
}

.explorer-swap svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.explorer-swap:hover:not(:disabled) {
  color: var(--fg-primary);
  background: var(--surface-hover);
  border-color: var(--border-strong);
}

.explorer-swap:active:not(:disabled) {
  transform: scale(0.96);
}

.explorer-path-result {
  min-height: 148px;
  padding: 12px;
  background: color-mix(in oklch, var(--surface-base) 75%, transparent);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
}

.explorer-route-summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: 0 2px 10px;
  gap: 12px;
}

.explorer-route-summary span {
  color: var(--explorer-route);
  font-family: var(--font-mono);
  font-size: 10px;
}

.explorer-route-summary p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 9px;
  text-align: right;
}

.explorer-route {
  display: flex;
  align-items: stretch;
  margin: 0;
  padding: 4px 3px 10px;
  overflow-x: auto;
  list-style: none;
  scrollbar-color: var(--surface-hover) transparent;
  scrollbar-width: thin;
}

.explorer-route > li {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
}

.explorer-route-step {
  position: relative;
  display: grid;
  width: clamp(154px, 17vw, 230px);
  min-height: 68px;
  padding: 9px 20px;
  place-content: center;
  color: var(--fg-secondary);
  text-align: center;
  gap: 3px;
}

.explorer-route-step::before,
.explorer-route-step::after {
  position: absolute;
  top: 50%;
  content: "";
}

.explorer-route-step::before {
  right: 8px;
  left: 8px;
  height: 2px;
  background: linear-gradient(90deg, var(--explorer-route), color-mix(in oklch, var(--explorer-route) 36%, transparent));
}

.explorer-route-step::after {
  right: 7px;
  width: 8px;
  height: 8px;
  border-top: 2px solid var(--explorer-route);
  border-right: 2px solid var(--explorer-route);
  transform: translateY(-50%) rotate(45deg);
}

.explorer-route-step > * {
  position: relative;
  z-index: 1;
  width: fit-content;
  max-width: 100%;
  margin-inline: auto;
  padding: 2px 5px;
  background: var(--surface-base);
}

.explorer-route-step span {
  color: var(--fg-muted);
  font-size: 8px;
}

.explorer-route-step strong {
  overflow-wrap: anywhere;
  font-size: 9px;
  font-weight: 650;
}

.explorer-route-step.event-step::before {
  background: repeating-linear-gradient(90deg, var(--explorer-radar) 0 5px, transparent 5px 9px);
}

.explorer-route-step.event-step::after {
  border-color: var(--explorer-radar);
}

.explorer-person-button {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  align-items: center;
  min-width: 0;
  min-height: 58px;
  padding: 7px 9px;
  color: var(--fg-secondary);
  text-align: left;
  background: var(--surface-raised);
  border: 1px solid var(--border-default);
  border-radius: 9px;
  gap: 8px;
  transition:
    color 150ms var(--ease-workspace),
    background-color 150ms var(--ease-workspace),
    border-color 150ms var(--ease-workspace),
    transform 90ms var(--ease-workspace);
}

.explorer-route .explorer-person-button {
  width: 174px;
}

.explorer-person-button:hover {
  color: var(--fg-primary);
  background: var(--surface-hover);
  border-color: var(--explorer-route);
}

.explorer-person-button:active {
  transform: scale(0.97);
}

.explorer-person-button > span:last-child {
  display: grid;
  min-width: 0;
  gap: 3px;
}

.explorer-person-button strong,
.explorer-person-button small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.explorer-person-button strong {
  color: var(--fg-primary);
  font-family: var(--font-display);
  font-size: 13px;
}

.explorer-person-button small {
  color: var(--fg-muted);
  font-size: 8px;
}

.explorer-avatar {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: var(--node-ink);
  background: var(--explorer-avatar, var(--accent));
  border: 2px solid var(--border-default);
  border-radius: 8px 8px 3px 8px;
  font-family: var(--font-display);
  font-weight: 800;
}

.explorer-perspective-result {
  min-height: 330px;
  padding: 14px;
  background:
    radial-gradient(circle at 50% 4%, color-mix(in oklch, var(--explorer-radar) 12%, transparent), transparent 36%),
    var(--surface-base);
  border: 1px solid var(--border-subtle);
  border-radius: 11px;
}

.explorer-perspective-origin {
  position: relative;
  width: min(270px, 100%);
  margin: 0 auto 16px;
}

.explorer-perspective-origin .explorer-person-button {
  position: relative;
  z-index: 2;
  width: 100%;
  border-color: color-mix(in oklch, var(--explorer-radar) 58%, var(--border-default));
  box-shadow: 0 0 0 5px color-mix(in oklch, var(--explorer-radar) 10%, transparent);
}

.explorer-radar-pulse {
  position: absolute;
  inset: -9px;
  border: 1px solid color-mix(in oklch, var(--explorer-radar) 44%, transparent);
  border-radius: 13px;
  animation: explorer-radar 2.8s ease-out infinite;
}

.explorer-perspective-layers {
  display: grid;
  gap: 8px;
}

.explorer-perspective-layer {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  min-width: 0;
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle);
  gap: 9px;
}

.explorer-layer-marker {
  display: grid;
  align-content: start;
  justify-items: center;
  color: var(--fg-muted);
  text-align: center;
  gap: 3px;
}

.explorer-layer-marker span {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  color: var(--explorer-radar);
  border: 1px solid color-mix(in oklch, var(--explorer-radar) 48%, var(--border-default));
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 10px;
}

.explorer-layer-marker small {
  font-size: 8px;
}

.explorer-layer-people {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  min-width: 0;
  gap: 6px;
}

.explorer-layer-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 14px;
  color: var(--fg-muted);
  text-align: center;
  border: 1px dashed var(--border-subtle);
  border-radius: 8px;
  font-size: 9px;
}

.explorer-structure-event-toggle {
  display: flex;
  align-items: center;
  min-height: 54px;
  margin-bottom: 10px;
  padding: 8px 11px;
  color: var(--fg-secondary);
  background: var(--warning-soft);
  border: 1px solid color-mix(in oklch, var(--warning) 30%, var(--border-subtle));
  border-radius: 9px;
  cursor: pointer;
  gap: 10px;
}

.explorer-structure-event-toggle input {
  width: 19px;
  height: 19px;
  flex: 0 0 auto;
  accent-color: var(--warning);
}

.explorer-structure-event-toggle span {
  display: grid;
  gap: 2px;
}

.explorer-structure-event-toggle strong {
  color: var(--fg-primary);
  font-size: 10px;
}

.explorer-structure-event-toggle small {
  color: var(--fg-muted);
  font-size: 9px;
  line-height: 1.4;
}

.explorer-structure-digest {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 10px;
  gap: 7px;
}

.explorer-structure-digest article {
  display: grid;
  min-width: 0;
  min-height: 82px;
  padding: 10px;
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  gap: 3px;
}

.explorer-structure-digest span,
.explorer-structure-digest small {
  color: var(--fg-muted);
  font-size: 8px;
}

.explorer-structure-digest strong {
  color: var(--fg-primary);
  font-family: var(--font-mono);
  font-size: 20px;
}

.explorer-structure-digest small {
  overflow-wrap: anywhere;
  line-height: 1.35;
}

.explorer-structure-columns {
  display: grid;
  grid-template-columns: minmax(250px, 0.78fr) minmax(340px, 1.22fr);
  gap: 10px;
}

.explorer-structure-columns > section,
.explorer-isolated {
  min-width: 0;
  padding: 12px;
  background: var(--surface-base);
  border: 1px solid var(--border-subtle);
  border-radius: 9px;
}

.explorer-subhead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  gap: 10px;
}

.explorer-subhead h4 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 15px;
}

.explorer-subhead span {
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 8px;
}

.explorer-component-list,
.explorer-bridge-list {
  display: grid;
  max-height: 330px;
  overflow: auto;
  scrollbar-color: var(--surface-hover) transparent;
  scrollbar-width: thin;
  gap: 5px;
}

.explorer-component-item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  align-items: center;
  min-height: 58px;
  padding: 8px;
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: 7px;
  gap: 8px;
}

.explorer-component-item > span {
  color: var(--explorer-radar);
  font-family: var(--font-mono);
  font-size: 9px;
}

.explorer-component-item div {
  min-width: 0;
}

.explorer-component-item strong {
  color: var(--fg-primary);
  font-size: 10px;
}

.explorer-component-item p {
  margin: 3px 0 0;
  overflow: hidden;
  color: var(--fg-muted);
  font-size: 8px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.explorer-component-item.isolated-component {
  border-style: dashed;
}

.explorer-bridge-item {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) minmax(104px, auto);
  align-items: center;
  width: 100%;
  min-height: 64px;
  padding: 8px;
  color: var(--fg-secondary);
  text-align: left;
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  gap: 8px;
  transition:
    background-color 150ms var(--ease-workspace),
    border-color 150ms var(--ease-workspace),
    transform 90ms var(--ease-workspace);
}

.explorer-bridge-item:hover {
  background: var(--surface-hover);
  border-color: var(--explorer-bridge);
}

.explorer-bridge-item:active {
  transform: scale(0.98);
}

.explorer-bridge-icon {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  color: var(--explorer-bridge);
  background: color-mix(in oklch, var(--explorer-bridge) 12%, var(--surface-control));
  border-radius: 50%;
}

.explorer-bridge-item > span:nth-child(2) {
  display: grid;
  min-width: 0;
  gap: 3px;
}

.explorer-bridge-item strong,
.explorer-bridge-item small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.explorer-bridge-item strong {
  color: var(--fg-primary);
  font-size: 10px;
}

.explorer-bridge-item small {
  color: var(--fg-muted);
  font-size: 8px;
}

.explorer-bridge-item em {
  color: var(--explorer-bridge);
  font-family: var(--font-mono);
  font-size: 8px;
  font-style: normal;
  text-align: right;
}

.explorer-isolated {
  margin-top: 10px;
}

.explorer-isolated-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
}

.explorer-no-isolated {
  grid-column: 1 / -1;
  margin: 0;
  padding: 15px;
  color: var(--positive);
  text-align: center;
  background: var(--positive-soft);
  border-radius: 7px;
  font-size: 9px;
}

.explorer-empty {
  display: grid;
  min-height: 118px;
  padding: 18px;
  place-content: center;
  color: var(--fg-secondary);
  text-align: center;
  gap: 5px;
}

.explorer-empty > span {
  color: var(--fg-faint);
  font-family: var(--font-mono);
  font-size: 22px;
}

.explorer-empty strong {
  color: var(--fg-primary);
  font-family: var(--font-display);
}

.explorer-empty p {
  max-width: 420px;
  margin: 0;
  color: var(--fg-muted);
  font-size: 9px;
  line-height: 1.55;
}

/* Theme-specific material language keeps the explorer coherent with all skins. */
:root[data-theme="ink"] .explorer-card,
:root[data-theme="ink"] .explorer-filter-bar {
  border-radius: 2px;
  box-shadow: 3px 4px 0 color-mix(in oklch, var(--fg-primary) 7%, transparent);
}

:root[data-theme="ink"] #explorerWorkspace::before {
  background-image: repeating-linear-gradient(0deg, transparent 0 5px, var(--border-subtle) 6px);
  background-size: auto;
  opacity: 0.16;
}

:root[data-theme="vermilion"] .explorer-card,
:root[data-theme="vermilion"] .explorer-filter-bar {
  border-color: color-mix(in oklch, var(--explorer-route) 34%, var(--border-subtle));
  box-shadow:
    inset 0 0 0 2px color-mix(in oklch, var(--explorer-route) 8%, transparent),
    0 16px 44px var(--shadow-color);
}

:root[data-theme="celadon"] .explorer-card,
:root[data-theme="celadon"] .explorer-filter-bar {
  border-radius: 18px 7px 18px 7px;
  box-shadow: inset 0 0 0 1px color-mix(in oklch, white 42%, transparent);
}

:root[data-theme="dunhuang"] #explorerWorkspace {
  background:
    radial-gradient(circle at 8% 0%, var(--explorer-wash), transparent 30%),
    linear-gradient(135deg, transparent 0 68%, color-mix(in oklch, var(--explorer-radar) 7%, transparent) 68% 72%, transparent 72%),
    var(--surface-base);
}

:root[data-theme="dunhuang"] .explorer-card-index {
  border-radius: 8px 2px 8px 2px;
}

@keyframes explorer-radar {
  0% { opacity: 0.8; transform: scale(0.96); }
  70%, 100% { opacity: 0; transform: scale(1.12); }
}

@media (max-width: 1180px) {
  .workspace-lenses.explorer-lenses-ready {
    padding-bottom: 3px;
  }

  .explorer-filter-bar {
    grid-template-columns: minmax(190px, 0.58fr) minmax(390px, 1.42fr);
  }

  .explorer-grid {
    grid-template-columns: minmax(280px, 0.78fr) minmax(390px, 1.22fr);
  }

  .explorer-layer-people {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 980px) {
  .explorer-filter-bar,
  .explorer-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .explorer-path-card,
  .explorer-structure-card {
    grid-column: auto;
  }

  .explorer-type-filter {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .explorer-structure-columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .explorer-isolated-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .workspace-lenses.explorer-lenses-ready {
    flex: 1 1 100%;
  }

  .explorer-header {
    align-items: start;
  }

  .explorer-readonly-badge {
    min-width: 52px;
    width: 52px;
    padding: 0;
    justify-content: center;
  }

  .explorer-readonly-badge span {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
  }

  .explorer-filter-bar {
    padding: 12px;
  }

  .explorer-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .explorer-card {
    padding: 14px;
  }

  .explorer-path-controls,
  .explorer-perspective-controls,
  .explorer-structure-digest {
    grid-template-columns: minmax(0, 1fr);
  }

  .explorer-swap {
    width: 100%;
  }

  .explorer-route-summary {
    display: grid;
  }

  .explorer-route-summary p {
    text-align: left;
  }

  .explorer-route {
    display: grid;
    overflow: visible;
    gap: 0;
  }

  .explorer-route > li {
    display: grid;
    justify-items: stretch;
  }

  .explorer-route .explorer-person-button {
    width: 100%;
  }

  .explorer-route-step {
    width: 100%;
    min-height: 72px;
    padding: 16px 28px;
  }

  .explorer-route-step::before {
    top: 5px;
    bottom: 5px;
    left: 19px;
    width: 2px;
    height: auto;
    background: linear-gradient(var(--explorer-route), color-mix(in oklch, var(--explorer-route) 36%, transparent));
  }

  .explorer-route-step::after {
    top: auto;
    right: auto;
    bottom: 5px;
    left: 15px;
    transform: rotate(135deg);
  }

  .explorer-route-step.event-step::before {
    background: repeating-linear-gradient(var(--explorer-radar) 0 5px, transparent 5px 9px);
  }

  .explorer-perspective-layer {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .explorer-bridge-item {
    grid-template-columns: 30px minmax(0, 1fr);
  }

  .explorer-bridge-item em {
    grid-column: 2;
    text-align: left;
  }
}

@media (max-width: 480px) {
  #explorerWorkspace {
    padding: 14px 10px 24px;
  }

  .explorer-type-filter,
  .explorer-isolated-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .explorer-type-option > span {
    justify-content: flex-start;
    padding-inline: 12px;
  }

  .explorer-card-head h3 {
    font-size: 20px;
  }

  .explorer-result-badge {
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .explorer-perspective-result,
  .explorer-path-result {
    padding: 9px;
  }

  .explorer-perspective-layer {
    grid-template-columns: minmax(0, 1fr);
  }

  .explorer-layer-marker {
    grid-template-columns: 30px auto;
    align-items: center;
    justify-content: start;
    text-align: left;
  }
}

@media (max-height: 720px) and (min-width: 681px) {
  #explorerWorkspace {
    padding-block: 16px 24px;
  }

  .explorer-header {
    margin-bottom: 13px;
  }

  .explorer-card,
  .explorer-filter-bar {
    padding-block: 12px;
  }

  .explorer-metrics article {
    min-height: 76px;
  }

  .explorer-card-head {
    margin-bottom: 10px;
  }
}

@media (pointer: coarse) {
  .explorer-person-button,
  .explorer-bridge-item,
  .explorer-swap,
  .explorer-type-option > span,
  .explorer-path-controls select,
  .explorer-perspective-controls select,
  .explorer-structure-event-toggle {
    min-height: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .explorer-radar-pulse {
    animation: none;
    opacity: 0.4;
  }

  .explorer-person-button,
  .explorer-bridge-item,
  .explorer-swap,
  .explorer-type-option > span {
    transition-duration: 0.01ms;
  }
}