.tree-pane { padding: var(--space-6); border-left: 1px solid var(--rule); position: relative; }

.tree-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}
.tree-toolbar .label {
  display: block;
  margin: 0;
  text-align: left;
  flex: 1 1 auto;
}

.tree-recenter {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 6px 12px;
  background: var(--surface);
  border: 1px solid var(--ink);
  border-radius: 2px;
  color: var(--ink);
  cursor: pointer;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s ease, color 0.15s ease;
}
.tree-recenter:hover { background: var(--ink); color: var(--surface); }
.tree-recenter > span { font-size: 14px; line-height: 1; }

.tree-scroll { overflow-x: auto; }
.tree-svg { display: block; margin: 0 auto; height: auto; max-height: none; }

.tree-node rect { fill: var(--surface); stroke: var(--rule); stroke-width: 1; transition: fill 0.2s ease, stroke 0.2s ease; }
.tree-node text { font-family: var(--serif); font-size: 12px; fill: var(--ink-soft); pointer-events: none; user-select: none; }
.tree-node.leaf rect { fill: var(--accent-soft); stroke: var(--accent); }
.tree-node.leaf text { fill: var(--accent); font-weight: bold; }
.tree-node.active rect { fill: var(--ink); stroke: var(--ink); }
.tree-node.active text { fill: var(--surface); }
.tree-node.active.leaf rect { fill: var(--accent); stroke: var(--accent); }
.tree-node.active.leaf text { fill: var(--surface); }
.tree-node.dim rect { opacity: 0.35; }
.tree-node.dim text { opacity: 0.5; }
.tree-node.clickable { cursor: pointer; }
.tree-node.clickable:hover rect { stroke: var(--ink); stroke-width: 2; }

.tree-link { fill: none; stroke: var(--rule); stroke-width: 1; }
.tree-link.active { stroke: var(--ink); stroke-width: 2; }
.tree-link.dim { opacity: 0.35; }