/* Search — facet partition instrument.
   Page-specific rules only; tokens, nav, cards, chips and buttons come from v4.css.
   The sentence filter is the signature of this page: serif, inline blanks, hairline underlines. */

:root {
  --rail: 300px;
}

/* ---------- Header ---------- */
.search-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 32px;
}

.search-head__text { min-width: 0; }

.search-readout {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: flex-end;
  min-height: 26px;
  padding-bottom: 4px;
}

.stat-pill { font-variant-numeric: tabular-nums; }
.stat-pill .readout-k { color: var(--ink-3); font-weight: 500; }
.stat-pill strong { color: var(--ink); font-weight: 600; font-family: var(--mono); font-size: 12px; }

/* ---------- Sentence filter ---------- */
.sentence-card {
  padding: 22px 26px 18px;
  margin-bottom: 18px;
}

.tree-sentence-lead {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.45;
  color: var(--ink);
}

.tree-sentence-prune {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 22px;
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.6;
  color: var(--ink);
}

.tree-sentence-wrap {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  max-width: 100%;
  min-width: 0;
}

.slot-index {
  display: none;
}

.slot-name {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-3);
  transition: color .15s var(--ease);
}

.slot-field {
  display: inline-flex;
  align-items: baseline;
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  border-bottom: 1px solid var(--line-2);
  padding: 0 2px;
  transition: border-color .15s var(--ease);
}

.tree-sentence-wrap .tree-sentence-input {
  border: none;
  outline: none;
  background: transparent;
  padding: 0;
  margin: 0;
  min-width: 2.2ch;
  width: 2.4rem;
  max-width: 100%;
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.5;
  color: var(--ink);
  caret-color: var(--accent);
}

.tree-sentence-wrap .tree-sentence-input::placeholder {
  color: var(--ink-4);
  font-style: italic;
}

.tree-sentence-ghost-suffix {
  color: var(--ink-4);
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.5;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  pointer-events: none;
  user-select: none;
}

.tree-sentence-wrap:focus-within .slot-field { border-bottom-color: var(--ink); }
.tree-sentence-wrap:focus-within .slot-name { color: var(--ink); }

.tree-sentence-wrap.is-set .slot-field { border-bottom-color: var(--accent); }
.tree-sentence-wrap.is-set .tree-sentence-input { color: var(--accent); }
.tree-sentence-wrap.is-set .slot-name { color: var(--accent); }

.tree-sentence-wrap.tree-sentence-input-dead .slot-field,
.tree-sentence-wrap.tree-sentence-input-dead:focus-within .slot-field {
  border-bottom-color: var(--danger);
}
.tree-sentence-wrap.tree-sentence-input-dead .tree-sentence-input { color: var(--danger); }

.tree-sentence-wrap.tree-sentence-input-invalid .slot-field,
.tree-sentence-wrap.tree-sentence-input-invalid:focus-within .slot-field {
  border-bottom-color: var(--warn);
}
.tree-sentence-wrap.tree-sentence-input-invalid .tree-sentence-input { color: var(--warn); }

.tree-sentence-wrap:focus-within { outline: none; }

.sentence-hint { margin: 12px 0 0; }

/* ---------- Workspace ---------- */
.search-workspace {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  align-items: start;
  gap: 18px;
}

.split-rail {
  position: sticky;
  top: calc(var(--nav-h) + 16px);
  max-height: calc(100vh - var(--nav-h) - 32px);
  overflow: auto;
}

.split-rail__title {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 400;
  letter-spacing: -.01em;
  margin-top: 2px;
}

.facet-prune-help {
  margin: 0 0 10px;
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--ink-3);
}

.facet-prune-rows { display: flex; flex-direction: column; }

.facet-prune-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 6px 12px;
  border-top: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: background .15s var(--ease);
}

.facet-prune-row:has(.facet-prune-split:checked) {
  background: var(--accent-soft);
  border-top-color: transparent;
}
.facet-prune-row:has(.facet-prune-split:checked) + .facet-prune-row { border-top-color: transparent; }

.facet-prune-inc {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
}

.facet-prune-idx {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .06em;
  color: var(--ink-3);
}

.facet-prune-inc input {
  accent-color: var(--accent);
  width: 14px;
  height: 14px;
  margin: 0;
}

.facet-prune-val-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 22px;
  color: var(--ink-3);
}

.facet-prune-allow {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.facet-prune-picker {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
}

.facet-prune-dropdown {
  width: 100%;
  padding: 6px 28px 6px 9px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-2);
  background: var(--surface);
  color: var(--ink);
  font-size: 12.5px;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2385837b' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>");
  background-repeat: no-repeat;
  background-position: right 9px center;
}

.facet-prune-dropdown:focus { border-color: var(--accent-2); outline: none; box-shadow: 0 0 0 3px rgba(46,107,184,.15); }

.facet-prune-dropdown:disabled {
  opacity: .5;
  cursor: not-allowed;
}

.facet-prune-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.facet-prune-chip {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  max-width: 100%;
  padding: 2px 3px 2px 9px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 500;
}

.facet-prune-chip-remove {
  border: none;
  background: transparent;
  color: var(--accent);
  cursor: pointer;
  padding: 0 6px;
  font-size: 15px;
  line-height: 1;
  border-radius: 999px;
  opacity: .7;
}

.facet-prune-chip-remove:hover { opacity: 1; color: var(--danger); }

.facet-prune-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.facet-prune-status {
  margin: 10px 0 0;
  min-height: 1.2em;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
  line-height: 1.4;
}

/* ---------- Tree stage ---------- */
.tree-stage { min-width: 0; }

.stage-bar { align-items: center; }

.stage-bar__text { display: flex; flex-direction: column; min-width: 0; }

.stage-note {
  font-size: 12.5px;
  color: var(--ink-3);
  margin-top: 2px;
}

.depth-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.depth-control .cl-select {
  width: auto;
  padding: 5px 30px 5px 10px;
  font-size: 12.5px;
  border-radius: var(--radius-sm);
}

.facet-zoom-tools { display: none; }
.facet-zoom-tools.visible { display: inline-flex; }
.facet-zoom-tools button { min-width: 32px; padding: 5px 10px; font-size: 14px; line-height: 1; }
.facet-zoom-tools .facet-zoom-fit { font-size: 12.5px; }

.tree-stage__body { padding: 14px 16px 16px; }

.tree-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 12px;
}

.tree-legend i {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  border: 1px solid var(--line-2);
  background: var(--surface-2);
}

.tree-legend .swatch-root { background: var(--ink); border-color: var(--ink); }
.tree-legend .swatch-branch { background: var(--surface-2); border-color: var(--line-2); }
.tree-legend .swatch-leaf { background: var(--accent-soft); border-color: var(--accent); }

.facet-tree-host {
  position: relative;
  min-height: min(70vh, 800px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.facet-tree-host .tree-loading,
.facet-tree-host .tree-error {
  padding: 56px 24px;
  text-align: center;
  font-size: 13.5px;
  color: var(--ink-3);
}

.facet-tree-host .tree-loading::before {
  content: "";
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid var(--line-2);
  border-top-color: var(--ink);
  border-radius: 50%;
  animation: cl-spin .7s linear infinite;
  vertical-align: -2px;
  margin-right: 8px;
}

.facet-tree-host .tree-error { color: var(--danger); }

.facet-tree-host svg {
  display: block;
  width: 100%;
  max-height: none;
  cursor: grab;
  animation: treeIn .3s var(--ease);
}

.facet-tree-host svg:active { cursor: grabbing; }

@keyframes treeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.facet-pan-tools {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 4;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.facet-pan-tools button {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-2);
  background: var(--surface);
  color: var(--ink-2);
  font-size: 13px;
  cursor: pointer;
  box-shadow: var(--shadow-1);
}

.facet-pan-tools button:hover { background: var(--surface-2); color: var(--ink); border-color: var(--ink-4); }

/* D3 nodes and links */
.facet-tree-host .node:focus { outline: none; }

.facet-tree-host .link {
  fill: none;
  stroke: var(--line-2);
  stroke-width: 1.25px;
  stroke-linecap: round;
}

.facet-tree-host .node-rect {
  fill: var(--surface-2);
  stroke: var(--line-2);
  stroke-width: 1px;
  cursor: pointer;
  transition: stroke .12s var(--ease);
}

.facet-tree-host .node-rect.root {
  fill: var(--ink);
  stroke: var(--ink);
}

.facet-tree-host .node-rect.leaf {
  fill: var(--accent-soft);
  stroke: var(--line-2);
}

.facet-tree-host .node:hover .node-rect { stroke: var(--ink-3); }
.facet-tree-host .node:hover .node-rect.leaf { stroke: var(--accent); }

.facet-tree-host .node:focus .node-rect,
.facet-tree-host .node-rect.is-selected,
.facet-tree-host .node:hover .node-rect.is-selected {
  stroke: var(--accent);
  stroke-width: 2px;
}

.facet-tree-host .node-label {
  fill: var(--ink);
  font-size: 12px;
  font-weight: 600;
  font-family: var(--sans);
  pointer-events: none;
}

.facet-tree-host .node-count {
  fill: var(--ink-2);
  font-size: 11px;
  font-weight: 500;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  pointer-events: none;
}

.facet-tree-host .node-sub {
  fill: var(--ink-3);
  font-size: 9px;
  font-family: var(--mono);
  pointer-events: none;
}

.facet-tree-host .node-rect.root ~ .node-label { fill: #fff; }
.facet-tree-host .node-rect.root ~ .node-count { fill: rgba(255,255,255,.78); }
.facet-tree-host .node-rect.root ~ .node-sub { fill: rgba(255,255,255,.55); }

.facet-tree-host .node-rect.leaf ~ .node-label { fill: var(--accent); }
.facet-tree-host .node-rect.leaf ~ .node-count { fill: var(--accent); }
.facet-tree-host .node-rect.leaf ~ .node-sub { fill: var(--accent-2); }

.search-footnote { margin: 12px 2px 0; line-height: 1.45; }

/* ---------- Cohort modal ---------- */
.cohort-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(21, 20, 15, .38);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.cohort-modal-backdrop[hidden] { display: none !important; }

.cohort-modal {
  position: relative;
  width: 100%;
  max-width: 540px;
  max-height: min(90vh, 700px);
  overflow: auto;
  padding: 22px 24px 20px;
  box-shadow: var(--shadow-2);
}

.cohort-modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 20px;
  line-height: 1;
  padding: 2px 8px;
}

.cohort-modal h3 {
  margin: 0 36px 6px 0;
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 400;
  letter-spacing: -.015em;
  line-height: 1.2;
  color: var(--ink);
}

.cohort-modal-meta {
  display: block;
  margin: 0 0 16px;
  font-size: 11.5px;
  color: var(--ink-3);
  word-break: break-all;
  line-height: 1.45;
}

.cohort-modal-gate { margin: 0 0 12px; }
.cohort-modal-gate[hidden] { display: none !important; }

.cohort-modal-key-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 10px;
  margin-bottom: 14px;
}
.cohort-modal-key-row[hidden] { display: none !important; }

.cohort-modal-key-row .cl-field {
  flex: 1 1 200px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-2);
}

.cohort-modal-key-row .cl-input { font-family: var(--mono); font-size: 13px; }

.cohort-modal-ids-wrap[hidden] { display: none !important; }

.cohort-modal-id-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 280px;
  overflow: auto;
  margin: 0 0 12px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface-2);
}

.cohort-modal-id-links:empty { display: none; }

.cohort-modal-id-link {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--accent);
  word-break: break-all;
}

.cohort-modal-ids-note { margin: 0 0 14px; }

.cohort-modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cohort-modal-ids[hidden] { display: none; }

.cohort-modal-ids {
  width: 100%;
  min-height: 120px;
  margin-bottom: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  resize: vertical;
}

.cohort-modal-error {
  margin: 10px 0 0;
  color: var(--danger);
  font-size: 13px;
}
.cohort-modal-error[hidden] { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .search-readout { justify-content: flex-start; }
  .search-workspace { grid-template-columns: 1fr; }
  .split-rail { position: static; max-height: none; }
  .facet-tree-host { min-height: 64vh; }
}

@media (max-width: 640px) {
  .sentence-card { padding: 18px 16px 14px; }
  .tree-sentence-lead,
  .tree-sentence-prune,
  .tree-sentence-wrap .tree-sentence-input,
  .tree-sentence-ghost-suffix { font-size: 19px; }
  .tree-sentence-prune { gap: 2px 16px; }
  .cohort-modal-backdrop { padding: 12px; }
  .cohort-modal { padding: 18px 16px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  .facet-tree-host svg,
  .tree-sentence-wrap,
  .slot-field { animation: none; transition: none; }
}