:root {
  --bg: #fbf9f4;
  --surface: #fff;
  --ink: #1f2430;
  --muted: #6b7280;
  --line: #e3ded2;
  --accent: #8a5a2b;
  --accent-soft: #f3e8d8;
  --female: #9d4d6b;
  --female-soft: #fbeaf0;
  --radius: 8px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181d; --surface: #1e2128; --ink: #e8e6e1; --muted: #9aa0ab;
    --line: #333842; --accent: #d9a05b; --accent-soft: #33291c;
    --female: #e08cab; --female-soft: #331e26;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 "Noto Sans Devanagari", "Kalimati", "Mangal", system-ui, sans-serif;
}
button { font: inherit; color: inherit; cursor: pointer; }

/* ---------- header ---------- */
.bar {
  position: sticky; top: 0; z-index: 20;
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
.bar h1 { margin: 0; font-size: 17px; font-weight: 700; color: var(--accent); white-space: nowrap; }

.search { position: relative; flex: 1 1 260px; min-width: 200px; }
.search input {
  width: 100%; padding: 8px 12px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg); color: var(--ink); font: inherit;
}
.search input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.results {
  position: absolute; top: calc(100% + 4px); left: 0; right: 0; z-index: 30;
  max-height: 55vh; overflow-y: auto; margin: 0; padding: 4px; list-style: none;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: 0 8px 24px rgb(0 0 0 / 0.14);
}
.results.empty { padding: 10px 12px; color: var(--muted); }
.results button {
  display: flex; justify-content: space-between; gap: 12px; align-items: baseline;
  width: 100%; padding: 7px 10px; text-align: start;
  background: none; border: 0; border-radius: 6px;
}
.results button:hover { background: var(--accent-soft); }
.results .meta { color: var(--muted); font-size: 12px; white-space: nowrap; }

.tools { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-size: 13px; }
.tools label { display: flex; gap: 5px; align-items: center; color: var(--muted); cursor: pointer; }
.tools button {
  padding: 6px 10px; background: var(--bg);
  border: 1px solid var(--line); border-radius: var(--radius);
}
.tools button:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- tree ---------- */
main { display: flex; align-items: flex-start; gap: 16px; padding: 16px; }
.tree, .children { margin: 0; padding: 0; list-style: none; }
.tree { flex: 1 1 auto; min-width: 0; }

/* The guide rail: one border, drawn by CSS, no SVG and no layout maths. */
.children {
  margin-inline-start: 11px;
  padding-inline-start: 15px;
  border-inline-start: 1px solid var(--line);
}

.row { display: flex; align-items: center; gap: 2px; }
.twisty {
  flex: 0 0 auto; width: 22px; height: 22px;
  display: grid; place-items: center;
  background: none; border: 0; border-radius: 5px;
  color: var(--muted); font-size: 15px; line-height: 1;
}
.twisty:hover { background: var(--accent-soft); color: var(--accent); }
.twisty.leaf { cursor: default; opacity: 0.35; }
.twisty.leaf:hover { background: none; }

.label {
  display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap;
  min-width: 0; padding: 3px 8px; text-align: start;
  background: none; border: 0; border-radius: 6px;
}
.label:hover { background: var(--accent-soft); }
.row.selected > .label { background: var(--accent); color: #fff; }
.row.selected > .label .pid,
.row.selected > .label .gen,
.row.selected > .label .aka { color: rgb(255 255 255 / 0.75); }
.row.selected > .label .count { background: rgb(255 255 255 / 0.25); color: #fff; }

.name { font-weight: 600; }
.row.female .name { color: var(--female); font-weight: 500; }
.row.female.selected > .label { background: var(--female); }
.aka, .pid, .gen { font-size: 12px; color: var(--muted); }
.pid { font-variant-numeric: tabular-nums; }
.gen { opacity: 0.7; }
.count {
  font-size: 11px; padding: 0 6px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); font-variant-numeric: tabular-nums;
}

/* ---------- detail panel ---------- */
.panel {
  position: sticky; top: 68px; flex: 0 0 300px;
  padding: 16px; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius);
}
.panel .close {
  float: inline-end; width: 26px; height: 26px;
  background: none; border: 0; border-radius: 5px; color: var(--muted); font-size: 18px;
}
.panel .close:hover { background: var(--accent-soft); }
.panel h2 { margin: 0; font-size: 18px; }
.panel h3 { margin: 18px 0 6px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.panel .sub { margin: 2px 0 12px; font-size: 12px; color: var(--muted); }

.panel dl { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; margin: 0; font-size: 13px; }
.panel dt { color: var(--muted); white-space: nowrap; }
.panel dd { margin: 0; }

.lineage, .kids { margin: 0; padding: 0; list-style: none; font-size: 13px; }
.lineage li { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.lineage li + li { border-top: 1px dashed var(--line); }
.lineage .g { color: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.lineage button, .kids button {
  padding: 4px 6px; margin-inline-start: -6px;
  background: none; border: 0; border-radius: 5px; text-align: start;
}
.lineage button:hover, .kids button:hover { background: var(--accent-soft); color: var(--accent); }
.lineage .current { padding: 4px 0; color: var(--accent); }
.kids button.female { color: var(--female); }

.status { padding: 32px 8px; color: var(--muted); }
.status.error { color: #c0392b; }
footer { padding: 12px 16px 32px; color: var(--muted); font-size: 12px; border-top: 1px solid var(--line); }

@media (max-width: 720px) {
  main { display: block; padding: 10px; }
  .panel {
    position: fixed; inset: auto 0 0 0; z-index: 40;
    max-height: 62vh; overflow-y: auto;
    border-radius: 14px 14px 0 0; box-shadow: 0 -8px 28px rgb(0 0 0 / 0.2);
  }
  main.has-panel .tree { padding-bottom: 62vh; }
  .bar h1 { font-size: 15px; }
}