diff --git a/gerbil-manager-web/src/pages/StammbaumPage.tsx b/gerbil-manager-web/src/pages/StammbaumPage.tsx
index 36046ce..032ec3e 100644
--- a/gerbil-manager-web/src/pages/StammbaumPage.tsx
+++ b/gerbil-manager-web/src/pages/StammbaumPage.tsx
@@ -1,26 +1,269 @@
 /**
  * FEAT-4: Stammbaum (Ahnentafel) — interaktiver Stammbaum-Viewer.
  *
- * Erster Ausbauschritt: Route + Grundgerüst (Tier laden, Titel, Rücksprung).
- * Der eigentliche Viewer (react-d3-tree, Druckansicht, Inzuchtkoeffizient)
- * folgt in den nächsten FEAT-4-Commits.
+ * - react-d3-tree, horizontal (klassische Ahnentafel: Tier links, Vorfahren
+ *   rechts; Vater oben, Mutter unten), Pinch-Zoom/Pan via d3-zoom plus
+ *   explizite +/−/Einpassen-Buttons.
+ * - Karten als foreignObject-HTML: Foto-Platzhalter (Fotos kommen mit FEAT-6),
+ *   Name, ♂/♀, Farbschlag-Chip, Geburtsjahr. Tipp auf eine Karte wurzelt den
+ *   Baum auf dieses Tier um; der Quellen-Cache bleibt erhalten, dadurch ist
+ *   der Wechsel unmittelbar.
+ * - Tiefe: 4 Generationen beim Laden (Board-Entscheidung), tiefere werden pro
+ *   Ast über den ＋-Knopf nachgeladen. Die Tiefenbegrenzung steckt im
+ *   Datenmodul (src/pedigree), nicht in react-d3-trees initialDepth — so sind
+ *   nachgeladene Generationen sofort sichtbar und es wird nie blind vorab
+ *   geladen.
+ * - Druck/PDF: separate CSS-Grid-Ahnentafel (.stammbaum-print), per
+ *   @media print sichtbar; Browser „Als PDF speichern“ ist der Export.
  */
-import { Link, useParams } from 'react-router-dom'
+import { useCallback, useEffect, useMemo, useRef, useState, type CSSProperties } from 'react'
+import { Link, useNavigate, useParams } from 'react-router-dom'
+import Tree from 'react-d3-tree'
+import type { CustomNodeElementProps, Point, RawNodeDatum } from 'react-d3-tree'
 import { de } from '../strings/de'
-import { getGerbil } from '../api/gerbils'
+import { ApiError } from '../api/client'
+import { listColorVarieties } from '../api/lookups'
+import { getInbreedingCoefficient } from '../api/pedigree'
+import type { Gender, Gerbil } from '../api/types'
 import { useApi } from '../hooks/useApi'
+import { formatDate, genderLabel } from '../format/labels'
+import { UNKNOWN_FARBSCHLAG, fromDisplayString, genotypeToFarbschlag } from '../genetics'
+import {
+  DEFAULT_GENERATIONS,
+  ancestorsAt,
+  buildPedigree,
+  collectNodes,
+  expandPedigree,
+  toRawNodeDatum,
+} from '../pedigree/build'
+import { chipColorFor } from '../pedigree/chipColors'
+import { createApiPedigreeSource } from '../pedigree/source'
+import type { AnimalNode, PedigreeNode } from '../pedigree/types'
+import './stammbaum.css'
+
+/* Kartengeometrie (px im Baum-Koordinatensystem). */
+const CARD_W = 190
+const CARD_H = 88
+/* nodeSize bei horizontaler Orientierung: x = Abstand der Generationen,
+   y = vertikales Raster der Karten (siehe react-d3-tree generateTree). */
+const NODE_X = 250
+const NODE_Y = 100
+const ZOOM_MIN = 0.2
+const ZOOM_MAX = 2
+
+function clamp(value: number, min: number, max: number): number {
+  return Math.min(max, Math.max(min, value))
+}
+
+function errorMessage(err: unknown): string {
+  if (err instanceof ApiError) return err.message
+  return de.api.errors.unknown
+}
+
+/** Tiefe und Blattzahl des sichtbaren Baums (für „Einpassen“). */
+function datumExtent(datum: RawNodeDatum): { depth: number; leaves: number } {
+  if (!datum.children || datum.children.length === 0) return { depth: 0, leaves: 1 }
+  let depth = 0
+  let leaves = 0
+  for (const child of datum.children) {
+    const e = datumExtent(child)
+    depth = Math.max(depth, e.depth + 1)
+    leaves += e.leaves
+  }
+  return { depth, leaves }
+}
+
+interface View {
+  zoom: number
+  translate: Point
+}
+
+interface TreeState {
+  forId: string | null
+  root: AnimalNode | null
+  error: string | null
+}
 
 export default function StammbaumPage() {
   const t = de.pages.stammbaum
   const { id = '' } = useParams()
+  const navigate = useNavigate()
 
-  const gerbil = useApi(() => getGerbil(id), [id])
+  /* ── Daten: Ahnenbaum (Cache überlebt das Umwurzeln) ── */
+  const [source] = useState(createApiPedigreeSource)
+  const [tree, setTree] = useState<TreeState>({ forId: null, root: null, error: null })
 
-  if (gerbil.loading) return <p className="muted">{de.common.loading}</p>
-  if (gerbil.error || !gerbil.data) {
+  useEffect(() => {
+    let cancelled = false
+    buildPedigree(source, id)
+      .then((root) => {
+        if (!cancelled) setTree({ forId: id, root, error: root ? null : t.notFound })
+      })
+      .catch((err: unknown) => {
+        if (!cancelled) setTree({ forId: id, root: null, error: errorMessage(err) })
+      })
+    return () => {
+      cancelled = true
+    }
+  }, [id, source, t])
+
+  const loading = tree.forId !== id
+  const root = loading ? null : tree.root
+
+  const handleExpand = useCallback(
+    (path: string) => {
+      const current = tree.root
+      if (!current || tree.forId !== id) return
+      expandPedigree(source, current, path)
+        .then((next) =>
+          // Nur übernehmen, wenn inzwischen nicht umgewurzelt wurde.
+          setTree((s) => (s.forId === id && s.root === current ? { ...s, root: next } : s)),
+        )
+        .catch(() => {
+          /* Nachladen fehlgeschlagen: Baum unverändert lassen; erneuter Tipp versucht es wieder. */
+        })
+    },
+    [tree, source, id],
+  )
+
+  /* ── Farbschlag: Lookup-Name, sonst aus dem Genotyp (GEN-1) ── */
+  const colorVarieties = useApi(() => listColorVarieties(), [])
+  const colorNameById = useMemo(
+    () => new Map((colorVarieties.data ?? []).map((c) => [c.id, c.name])),
+    [colorVarieties.data],
+  )
+  const farbschlagOf = useCallback(
+    (g: Gerbil): string | null => {
+      const byId = g.colorVarietyId ? colorNameById.get(g.colorVarietyId) : undefined
+      if (byId) return byId
+      if (g.genotype && g.genotype.trim()) {
+        try {
+          const name = genotypeToFarbschlag(fromDisplayString(g.genotype))
+          return name === UNKNOWN_FARBSCHLAG ? null : name
+        } catch {
+          return null
+        }
+      }
+      return null
+    },
+    [colorNameById],
+  )
+
+  /* ── Inzuchtkoeffizient (Endpunkt folgt serverseitig — bis dahin 404) ── */
+  const inbreeding = useApi(() => getInbreedingCoefficient(id), [id])
+  const inbreedingText =
+    !inbreeding.loading && !inbreeding.error && inbreeding.data != null
+      ? `${(inbreeding.data * 100).toLocaleString('de-DE', { maximumFractionDigits: 1 })} %`
+      : t.inbreeding.unavailable
+
+  /* ── react-d3-tree-Daten ── */
+  const nodesByPath = useMemo(() => (root ? collectNodes(root) : null), [root])
+  const datum = useMemo(() => (root ? toRawNodeDatum(root, t.unknown) : null), [root, t])
+
+  /* ── Zeichenfläche vermessen (Erst-Zentrierung + Einpassen) ── */
+  const canvasRef = useRef<HTMLDivElement | null>(null)
+  const [size, setSize] = useState<{ w: number; h: number } | null>(null)
+  const hasRoot = root !== null
+  useEffect(() => {
+    const el = canvasRef.current
+    if (!el) return
+    const update = () => setSize({ w: el.clientWidth, h: el.clientHeight })
+    update()
+    const observer = new ResizeObserver(update)
+    observer.observe(el)
+    return () => observer.disconnect()
+  }, [hasRoot])
+
+  /* ── Ansicht (Zoom/Position): Wurzelkarte beim Laden zentriert ── */
+  const defaultView = useMemo<View | null>(() => {
+    if (!size) return null
+    const zoom = size.w < 520 ? 0.8 : 1
+    return {
+      zoom,
+      translate: { x: Math.min(size.w / 2, CARD_W * zoom + 48), y: size.h / 2 },
+    }
+  }, [size])
+
+  const [viewOverride, setViewOverride] = useState<(View & { forId: string }) | null>(null)
+  const view = viewOverride && viewOverride.forId === id ? viewOverride : defaultView
+  /* Letzter Live-Stand aus d3 (Nutzer-Pan/-Pinch), Basis der Zoom-Buttons. */
+  const liveView = useRef<(View & { forId: string }) | null>(null)
+  const handleTreeUpdate = useCallback(
+    (target: { node: unknown; zoom: number; translate: Point }) => {
+      liveView.current = { forId: id, zoom: target.zoom, translate: target.translate }
+    },
+    [id],
+  )
+
+  const setView = useCallback(
+    (next: View) => {
+      setViewOverride({ forId: id, ...next })
+      liveView.current = { forId: id, ...next }
+    },
+    [id],
+  )
+
+  /** Zoomt um `factor` um die Mitte der Zeichenfläche. */
+  const applyZoom = useCallback(
+    (factor: number) => {
+      if (!size || !view) return
+      const current = liveView.current && liveView.current.forId === id ? liveView.current : view
+      const zoom = clamp(current.zoom * factor, ZOOM_MIN, ZOOM_MAX)
+      const k = zoom / current.zoom
+      const c = { x: size.w / 2, y: size.h / 2 }
+      setView({
+        zoom,
+        translate: {
+          x: c.x - (c.x - current.translate.x) * k,
+          y: c.y - (c.y - current.translate.y) * k,
+        },
+      })
+    },
+    [size, view, id, setView],
+  )
+
+  /** Passt den ganzen Baum in die Zeichenfläche ein. */
+  const fitView = useCallback(() => {
+    if (!size || !datum) return
+    const extent = datumExtent(datum)
+    const width = extent.depth * NODE_X + CARD_W + 32
+    const height = extent.leaves * NODE_Y + 32
+    const zoom = clamp(Math.min(size.w / width, size.h / height), ZOOM_MIN, ZOOM_MAX)
+    setView({ zoom, translate: { x: (CARD_W / 2 + 16) * zoom, y: size.h / 2 } })
+  }, [size, datum, setView])
+
+  /* ── Ahnenkarten ── */
+  const renderNode = useCallback(
+    ({ nodeDatum }: CustomNodeElementProps) => {
+      const path = String(nodeDatum.attributes?.path ?? '')
+      const node = nodesByPath?.get(path)
+      return (
+        <g>
+          <foreignObject width={CARD_W} height={CARD_H} x={-CARD_W / 2} y={-CARD_H / 2}>
+            {!node || node.kind === 'unknown' ? (
+              <div className="pedigree-card pedigree-card--unknown">{t.unknown}</div>
+            ) : (
+              <PedigreeCard
+                node={node}
+                isRoot={path === ''}
+                farbschlag={farbschlagOf(node.gerbil)}
+                onOpen={() => navigate(`/rennmaeuse/${node.gerbil.id}/stammbaum`)}
+                onExpand={() => handleExpand(path)}
+              />
+            )}
+          </foreignObject>
+        </g>
+      )
+    },
+    [nodesByPath, farbschlagOf, navigate, handleExpand, t],
+  )
+
+  /* ── Zustände: Laden / Fehler ── */
+  if (loading) return <p className="muted">{de.common.loading}</p>
+  if (!root || !datum) {
     return (
       <section className="page">
-        <p className="muted">{gerbil.error ?? t.notFound}</p>
+        <p className="muted">{tree.error ?? t.notFound}</p>
         <Link to="/rennmaeuse" className="btn">
           {de.pages.gerbils.detail.back}
         </Link>
@@ -28,17 +271,237 @@ export default function StammbaumPage() {
     )
   }
 
-  const g = gerbil.data
   return (
-    <section className="page">
-      <header className="page-head">
-        <h2>{t.titleFor(g.name)}</h2>
-        <div className="head-actions">
-          <Link to={`/rennmaeuse/${g.id}`} className="btn">
-            {t.backToAnimal}
-          </Link>
+    <>
+      <section className="page stammbaum-screen">
+        <header className="page-head">
+          <h2>{t.titleFor(root.gerbil.name)}</h2>
+          <div className="head-actions">
+            <Link to={`/rennmaeuse/${root.gerbil.id}`} className="btn">
+              {t.backToAnimal}
+            </Link>
+          </div>
+        </header>
+
+        <div className="stammbaum-toolbar">
+          <button
+            type="button"
+            className="btn stammbaum-zoombtn"
+            onClick={() => applyZoom(1.25)}
+            aria-label={t.zoomIn}
+            title={t.zoomIn}
+          >
+            ＋
+          </button>
+          <button
+            type="button"
+            className="btn stammbaum-zoombtn"
+            onClick={() => applyZoom(0.8)}
+            aria-label={t.zoomOut}
+            title={t.zoomOut}
+          >
+            −
+          </button>
+          <button type="button" className="btn" onClick={fitView}>
+            {t.zoomFit}
+          </button>
+          <span className="stammbaum-toolbar__spacer" />
+          <span className="stammbaum-inzucht">
+            {t.inbreeding.label}: <b>{inbreedingText}</b>
+          </span>
+          <button type="button" className="btn" onClick={() => window.print()}>
+            {t.print}
+          </button>
         </div>
-      </header>
-    </section>
+
+        <div className="stammbaum-canvas" ref={canvasRef}>
+          {view && (
+            <Tree
+              key={id}
+              data={datum}
+              renderCustomNodeElement={renderNode}
+              orientation="horizontal"
+              pathFunc="step"
+              translate={view.translate}
+              zoom={view.zoom}
+              scaleExtent={{ min: ZOOM_MIN, max: ZOOM_MAX }}
+              zoomable
+              draggable
+              collapsible={false}
+              nodeSize={{ x: NODE_X, y: NODE_Y }}
+              separation={{ siblings: 1, nonSiblings: 1 }}
+              onUpdate={handleTreeUpdate}
+            />
+          )}
+        </div>
+        <p className="stammbaum-hint">{t.tapHint}</p>
+      </section>
+
+      {/* Druckansicht: am Bildschirm unsichtbar, ersetzt beim Drucken alles. */}
+      <PrintPedigree root={root} farbschlagOf={farbschlagOf} inbreedingText={inbreedingText} />
+    </>
+  )
+}
+
+/* ── Ahnenkarte (interaktive Ansicht) ───────────────────────────── */
+
+function PedigreeCard({
+  node,
+  isRoot,
+  farbschlag,
+  onOpen,
+  onExpand,
+}: {
+  node: AnimalNode
+  isRoot: boolean
+  farbschlag: string | null
+  onOpen: () => void
+  onExpand: () => void
+}) {
+  const t = de.pages.stammbaum
+  const g = node.gerbil
+  const chip = farbschlag ? chipColorFor(farbschlag) : null
+  const year = g.dateOfBirth ? g.dateOfBirth.slice(0, 4) : null
+  return (
+    <div
+      className={isRoot ? 'pedigree-card pedigree-card--root' : 'pedigree-card'}
+      onClick={isRoot ? undefined : onOpen}
+      role={isRoot ? undefined : 'button'}
+      title={isRoot ? undefined : t.tapHint}
+    >
+      {/* Foto-Platzhalter — echte Fotos kommen mit FEAT-6. */}
+      <div className="pedigree-card__photo" aria-hidden="true">
+        🐭
+      </div>
+      <div className="pedigree-card__body">
+        <div className="pedigree-card__name">
+          <SexIcon gender={g.gender} />
+          <span className="pedigree-card__nametext">{g.name}</span>
+        </div>
+        {farbschlag && (
+          <span
+            className="pedigree-chip"
+            style={chip ? { background: chip.bg, color: chip.fg } : undefined}
+          >
+            {farbschlag}
+          </span>
+        )}
+        {year && <span className="pedigree-card__year">* {year}</span>}
+      </div>
+      {node.expandable && (
+        <button
+          type="button"
+          className="pedigree-card__expand"
+          aria-label={t.expand}
+          title={t.expand}
+          onClick={(e) => {
+            e.stopPropagation()
+            onExpand()
+          }}
+        >
+          ＋
+        </button>
+      )}
+    </div>
+  )
+}
+
+function SexIcon({ gender }: { gender: Gender }) {
+  const symbol = gender === 'male' ? '♂' : gender === 'female' ? '♀' : '?'
+  return (
+    <span
+      className={`pedigree-card__sex pedigree-card__sex--${gender}`}
+      title={genderLabel(gender)}
+      aria-label={genderLabel(gender)}
+    >
+      {symbol}
+    </span>
+  )
+}
+
+/* ── Druckansicht: Ahnentafel als CSS-Grid (Zertifikats-Layout) ── */
+
+function PrintPedigree({
+  root,
+  farbschlagOf,
+  inbreedingText,
+}: {
+  root: AnimalNode
+  farbschlagOf: (g: Gerbil) => string | null
+  inbreedingText: string
+}) {
+  const t = de.pages.stammbaum
+  const generations = Array.from({ length: DEFAULT_GENERATIONS + 1 }, (_, g) =>
+    ancestorsAt(root, g),
+  )
+  const today = new Date().toLocaleDateString('de-DE')
+  return (
+    <div className="stammbaum-print">
+      <header className="stammbaum-print__head">
+        <h1>{t.titleFor(root.gerbil.name)}</h1>
+        <p className="stammbaum-print__meta">
+          {t.inbreeding.label}: {inbreedingText} · {t.printView.createdOn} {today}
+        </p>
+      </header>
+      <div className="stammbaum-print__grid">
+        {generations.map((_, g) => (
+          <div key={`gen-${g}`} className="stammbaum-print__gen" style={{ gridColumn: g + 1, gridRow: 1 }}>
+            {t.printView.generations[g]}
+          </div>
+        ))}
+        {generations.flatMap((slots, g) => {
+          const span = 2 ** (DEFAULT_GENERATIONS - g)
+          return slots.map((node, i) => (
+            <PrintCell
+              key={`${g}:${i}`}
+              node={node}
+              gen={g}
+              farbschlag={node?.kind === 'animal' ? farbschlagOf(node.gerbil) : null}
+              style={{ gridColumn: g + 1, gridRow: `${i * span + 2} / span ${span}` }}
+            />
+          ))
+        })}
+      </div>
+    </div>
+  )
+}
+
+function PrintCell({
+  node,
+  gen,
+  farbschlag,
+  style,
+}: {
+  node: PedigreeNode | null
+  gen: number
+  farbschlag: string | null
+  style: CSSProperties
+}) {
+  const t = de.pages.stammbaum
+  const base = `stammbaum-print__cell stammbaum-print__cell--g${gen}`
+  if (!node) return <div className={`${base} stammbaum-print__cell--empty`} style={style} />
+  if (node.kind === 'unknown') {
+    return (
+      <div className={`${base} stammbaum-print__cell--unknown`} style={style}>
+        {t.unknown}
+      </div>
+    )
+  }
+  const g = node.gerbil
+  const sexSymbol = g.gender === 'male' ? '♂ ' : g.gender === 'female' ? '♀ ' : ''
+  return (
+    <div className={base} style={style}>
+      <div className="stammbaum-print__name">
+        {sexSymbol}
+        {g.name}
+      </div>
+      {g.dateOfBirth && (
+        <div className="stammbaum-print__sub">
+          {t.printView.born} {formatDate(g.dateOfBirth)}
+        </div>
+      )}
+      {farbschlag && <div className="stammbaum-print__sub">{farbschlag}</div>}
+      {g.genotype && gen <= 2 && <div className="stammbaum-print__geno">{g.genotype}</div>}
+    </div>
   )
 }
diff --git a/gerbil-manager-web/src/pages/stammbaum.css b/gerbil-manager-web/src/pages/stammbaum.css
new file mode 100644
index 0000000..35bf1dd
--- /dev/null
+++ b/gerbil-manager-web/src/pages/stammbaum.css
@@ -0,0 +1,302 @@
+/* FEAT-4: Stammbaum — Bildschirm- und Druckstile.
+   Bewusst eigene Datei statt index.css: index.css wird parallel von
+   FEAT-1/2/5 bearbeitet (geteilter Arbeitsbaum), und die Druckregeln
+   bleiben hier gekapselt. */
+
+/* ── Werkzeugleiste ───────────────────────────────────────────── */
+
+.stammbaum-toolbar {
+  display: flex;
+  gap: 0.5rem;
+  align-items: center;
+  flex-wrap: wrap;
+  margin: 0.75rem 0 0.5rem;
+}
+
+.stammbaum-toolbar__spacer {
+  flex: 1;
+}
+
+.stammbaum-zoombtn {
+  min-width: 44px;
+  padding: 0.5rem 0.6rem;
+  font-size: 1.1rem;
+  line-height: 1;
+}
+
+.stammbaum-inzucht {
+  font-size: 0.85rem;
+  color: var(--color-text-muted);
+  white-space: nowrap;
+}
+
+.stammbaum-inzucht b {
+  color: var(--color-text);
+}
+
+.stammbaum-hint {
+  font-size: 0.8rem;
+  color: var(--color-text-muted);
+  margin: 0.4rem 0 0;
+}
+
+/* ── Zeichenfläche ────────────────────────────────────────────── */
+
+.stammbaum-canvas {
+  height: clamp(18rem, 62dvh, 46rem);
+  border: 1px solid var(--color-border);
+  border-radius: 0.6rem;
+  background:
+    radial-gradient(var(--color-border) 1px, transparent 1px) 0 0 / 22px 22px,
+    var(--color-surface);
+  overflow: hidden;
+  /* Pinch/Pan gehören d3-zoom, nicht dem Browser-Scrolling. */
+  touch-action: none;
+}
+
+.stammbaum-canvas .rd3t-tree-container {
+  width: 100%;
+  height: 100%;
+}
+
+.stammbaum-canvas .rd3t-link {
+  stroke: var(--color-border);
+  stroke-width: 1.5;
+}
+
+/* ── Ahnenkarten (foreignObject-HTML) ─────────────────────────── */
+
+.pedigree-card {
+  box-sizing: border-box;
+  width: 100%;
+  height: 100%;
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.4rem 0.55rem;
+  background: var(--color-surface);
+  border: 1px solid var(--color-border);
+  border-radius: 0.6rem;
+  box-shadow: 0 1px 2px rgb(59 48 38 / 10%);
+  overflow: hidden;
+  cursor: pointer;
+  font-family: system-ui, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
+  color: var(--color-text);
+}
+
+.pedigree-card:hover:not(.pedigree-card--root):not(.pedigree-card--unknown) {
+  background: var(--color-accent-soft);
+}
+
+.pedigree-card--root {
+  border: 2px solid var(--color-accent);
+  cursor: default;
+}
+
+.pedigree-card--unknown {
+  justify-content: center;
+  border-style: dashed;
+  background: transparent;
+  color: var(--color-text-muted);
+  font-style: italic;
+  font-size: 0.85rem;
+  cursor: default;
+}
+
+.pedigree-card__photo {
+  flex: none;
+  width: 42px;
+  height: 42px;
+  border-radius: 50%;
+  background: var(--color-accent-soft);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 1.4rem;
+}
+
+.pedigree-card__body {
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 0.15rem;
+}
+
+.pedigree-card__name {
+  display: flex;
+  align-items: center;
+  gap: 0.3rem;
+  font-weight: 600;
+  font-size: 0.9rem;
+}
+
+.pedigree-card__nametext {
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.pedigree-card__sex--male {
+  color: #3a6ea5;
+}
+
+.pedigree-card__sex--female {
+  color: #b5527d;
+}
+
+.pedigree-card__sex--unknown {
+  color: var(--color-text-muted);
+}
+
+.pedigree-chip {
+  align-self: flex-start;
+  max-width: 100%;
+  font-size: 0.68rem;
+  padding: 0.1rem 0.45rem;
+  border-radius: 1rem;
+  background: var(--color-accent-soft);
+  color: var(--color-accent);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.pedigree-card__year {
+  font-size: 0.72rem;
+  color: var(--color-text-muted);
+}
+
+.pedigree-card__expand {
+  flex: none;
+  margin-left: auto;
+  width: 32px;
+  height: 32px;
+  border-radius: 50%;
+  border: 1px solid var(--color-accent);
+  background: var(--color-accent-soft);
+  color: var(--color-accent);
+  font-size: 1.05rem;
+  line-height: 1;
+  cursor: pointer;
+}
+
+.pedigree-card__expand:hover {
+  background: var(--color-accent);
+  color: #fff;
+}
+
+/* ── Druckansicht (Ahnentafel als CSS-Grid, Hunde-Zertifikat-Optik) ──
+   Am Bildschirm unsichtbar; @media print blendet App-Chrome und die
+   interaktive Ansicht aus und zeigt stattdessen die Tafel.
+   (:has-Scoping, damit der Druck ANDERER Seiten unberührt bleibt.) */
+
+.stammbaum-print {
+  display: none;
+}
+
+@media print {
+  @page {
+    size: A4 landscape;
+    margin: 10mm;
+  }
+
+  body:has(.stammbaum-print) .app-header,
+  body:has(.stammbaum-print) .app-nav,
+  body:has(.stammbaum-print) .stammbaum-screen {
+    display: none !important;
+  }
+
+  .stammbaum-print {
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+    color: #000;
+  }
+}
+
+.stammbaum-print__head {
+  display: flex;
+  justify-content: space-between;
+  align-items: baseline;
+  gap: 4mm;
+  border-bottom: 2pt solid #333;
+  padding-bottom: 2mm;
+  margin-bottom: 3mm;
+}
+
+.stammbaum-print__head h1 {
+  font-size: 16pt;
+  margin: 0;
+}
+
+.stammbaum-print__meta {
+  font-size: 9pt;
+  color: #444;
+  margin: 0;
+}
+
+.stammbaum-print__grid {
+  flex: 1;
+  display: grid;
+  grid-template-columns: repeat(5, 1fr);
+  grid-template-rows: auto repeat(16, minmax(0, 1fr));
+  gap: 1.5mm;
+  min-height: 0;
+}
+
+.stammbaum-print__gen {
+  font-size: 8pt;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+  color: #555;
+  align-self: end;
+  padding-bottom: 0.5mm;
+}
+
+.stammbaum-print__cell {
+  border: 0.5pt solid #999;
+  border-radius: 1mm;
+  padding: 1mm 2mm;
+  overflow: hidden;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  gap: 0.5mm;
+  font-size: 9pt;
+  break-inside: avoid;
+}
+
+/* Hintere Generationen: kleinere Schrift, damit 16 Zellen passen. */
+.stammbaum-print__cell--g3 {
+  font-size: 8pt;
+}
+
+.stammbaum-print__cell--g4 {
+  font-size: 7pt;
+  padding: 0.5mm 1mm;
+}
+
+.stammbaum-print__cell--empty {
+  border-style: dashed;
+  border-color: #ccc;
+}
+
+.stammbaum-print__cell--unknown {
+  color: #888;
+  font-style: italic;
+}
+
+.stammbaum-print__name {
+  font-weight: 600;
+}
+
+.stammbaum-print__sub {
+  font-size: 0.85em;
+  color: #444;
+}
+
+.stammbaum-print__geno {
+  font-family: Consolas, 'Courier New', monospace;
+  font-size: 0.8em;
+  color: #555;
+}