:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --line: #e6e8eb;
  --text: #111318;
  --muted: #6b7280;
  --hover: #f3f4f6;
  --accent: #1f4e79;
  --company: #1f4e79;
  --department: #3f6f8f;
  --position: #6b7280;
  --row-h: 36px;
  --font: ui-sans-serif, system-ui, -apple-system, "PingFang HK", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.top {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-end;
  padding: 20px 24px 12px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.02em;
}
.sub {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}
.metrics {
  display: grid;
  grid-template-columns: repeat(6, minmax(88px, 1fr));
  gap: 8px 16px;
}
.metric .k {
  display: block;
  font-size: 11px;
  color: var(--muted);
}
.metric .v {
  display: block;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 12px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
#search {
  flex: 1;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 10px;
  font: inherit;
  font-size: 13px;
  background: #fff;
}
#search:focus { outline: 2px solid #c9d7e6; border-color: var(--accent); }
.toolbar-right { display: flex; gap: 8px; align-items: center; }
.seg {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}
.seg button, .toolbar-right > button {
  height: 34px;
  border: 0;
  background: #fff;
  font: inherit;
  font-size: 12px;
  padding: 0 12px;
  cursor: pointer;
  color: var(--text);
}
.seg button { border-right: 1px solid var(--line); }
.seg button:last-child { border-right: 0; }
.seg button.on { background: var(--accent); color: #fff; }
.toolbar-right > button {
  border: 1px solid var(--line);
  border-radius: 6px;
}
.toolbar-right > button:hover, .seg button:hover { background: var(--hover); }
.seg button.on:hover { background: var(--accent); }

.legend {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 8px 24px;
  font-size: 12px;
  color: var(--muted);
}
.pill {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
  font-size: 11px;
  color: var(--text);
}
.pill.company { border-left: 3px solid var(--company); }
.pill.department { border-left: 3px solid var(--department); }
.pill.position { border-left: 3px solid var(--position); }
.hint { margin-left: 8px; }

.tree-wrap {
  flex: 1;
  min-height: 0;
  padding: 0 24px 24px;
}
.viewport {
  height: calc(100vh - 196px);
  min-height: 360px;
  overflow: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  position: relative;
}
.spacer { width: 100%; pointer-events: none; }
.rows { position: absolute; left: 0; right: 0; top: 0; }
.row {
  height: var(--row-h);
  display: flex;
  align-items: center;
  gap: 8px;
  padding-right: 16px;
  border-bottom: 1px solid #f0f1f3;
  white-space: nowrap;
  cursor: pointer;
}
.row[hidden] { display: none; }
.row.is-leaf { cursor: default; }
.row:hover { background: var(--hover); }
.row.is-pos { color: #374151; }
.toggle {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: transparent;
  cursor: pointer;
  color: #4b5563;
  padding: 0;
}
.toggle svg { width: 12px; height: 12px; }
.toggle.leaf { visibility: hidden; }
.label { font-size: 13px; overflow: hidden; text-overflow: ellipsis; }
.code {
  font-size: 11px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  margin-left: auto;
  padding-left: 12px;
}
.badge {
  font-size: 10px;
  line-height: 18px;
  height: 18px;
  padding: 0 6px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--muted);
  flex: 0 0 auto;
}
.badge.company { color: var(--company); }
.badge.department { color: var(--department); }
.badge.position { color: var(--position); }

.empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  pointer-events: none;
}
.empty[hidden] { display: none; }

@media (max-width: 960px) {
  .top { flex-direction: column; align-items: stretch; }
  .metrics { grid-template-columns: repeat(3, 1fr); }
  .toolbar { flex-direction: column; align-items: stretch; }
}