diff --git a/gerbil-manager-web/e2e/bestand.spec.ts b/gerbil-manager-web/e2e/bestand.spec.ts
index dc7dc59..8d49510 100644
--- a/gerbil-manager-web/e2e/bestand.spec.ts
+++ b/gerbil-manager-web/e2e/bestand.spec.ts
@@ -1,5 +1,5 @@
 /** BESTAND-FILTER: die Tiere-Liste zeigt standardmäßig nur den eigenen Bestand. */
-import { de, expect, gotoSection, openFilterPanel, skipUnlessMock, test } from './fixtures'
+import { de, expect, gotoSection, skipUnlessMock, test } from './fixtures'
 
 const t = de.pages.gerbils
 
@@ -19,9 +19,8 @@ test('Toggle „Externe Ahnen einblenden” zeigt externe Tiere mit Extern-Marki
   await gotoSection(page, de.nav.gerbils)
   await expect(page.locator('.gerbil-row', { hasText: 'Krümel' })).toBeVisible()
 
-  // UX-MOBILE-1: Checkbox liegt im Filter-Drawer — auf Mobil erst öffnen.
-  await openFilterPanel(page)
-  await page.getByRole('checkbox', { name: t.filters.showExternal }).check()
+  // DESIGN (Rennmaus Filter): „Externe Ahnen" ist ein Toggle-Chip (Button), kein Checkbox.
+  await page.getByRole('button', { name: t.filters.showExternalShort }).click()
 
   const maxRow = page.locator('.gerbil-row', { hasText: 'Max' })
   await expect(maxRow).toBeVisible()
diff --git a/gerbil-manager-web/e2e/filter-panel.spec.ts b/gerbil-manager-web/e2e/filter-panel.spec.ts
index 7ba4976..4831195 100644
--- a/gerbil-manager-web/e2e/filter-panel.spec.ts
+++ b/gerbil-manager-web/e2e/filter-panel.spec.ts
@@ -1,85 +1,54 @@
 /**
- * UX-MOBILE-1: FilterPanel — einklappbare Filter auf Smartphone, inline auf Desktop.
+ * DESIGN (Rennmaus Filter.html): Quick-Chips-Filter der Rennmäuse-Liste.
  *
- * Telefon (390px): Filter-Button sichtbar, Drawer eingeklappt; Tippen öffnet/schliesst.
- * Desktop (1280px): Alle Controls direkt sichtbar, kein Toggle-Button.
+ * Eine Pillen-Reihe (Status / Geschlecht / Farbschlag / Herkunft) öffnet je ein
+ * Bottom-Sheet mit Mehrfachauswahl; gewählte Werte erscheinen als entfernbare
+ * Chips, „Alle löschen" setzt zurück. Mobile-first; identisches Verhalten auf Desktop.
  */
-import { de, expect, gotoSection, skipUnlessMock, test } from './fixtures'
+import { de, expect, gotoSection, selectListFilter, skipUnlessMock, test } from './fixtures'
 
 const t = de.pages.gerbils
 
-test.describe('FilterPanel – Rennmäuse-Liste', () => {
-  test('Phone: Filter-Drawer standardmäßig eingeklappt, Toggle-Button sichtbar', async ({
-    page,
-  }, testInfo) => {
+test.describe('Quick-Chips-Filter – Rennmäuse-Liste', () => {
+  test('Kategorie-Pillen sind sichtbar', async ({ page }) => {
     skipUnlessMock()
-    if (testInfo.project.name !== 'phone') return
-
     await gotoSection(page, de.nav.gerbils)
     await expect(page.getByRole('heading', { name: t.title, exact: true })).toBeVisible()
 
-    // Toggle-Button sichtbar.
-    const toggle = page.locator('.filter-panel__toggle')
-    await expect(toggle).toBeVisible()
-
-    // Status-Beschriftung im Drawer ist noch verborgen.
-    await expect(page.getByText(t.filters.status, { exact: true }).first()).not.toBeVisible()
+    const quickrow = page.locator('.rmf-quickrow')
+    await expect(quickrow.getByRole('button', { name: t.filters.status })).toBeVisible()
+    await expect(quickrow.getByRole('button', { name: t.filters.gender })).toBeVisible()
+    await expect(quickrow.getByRole('button', { name: t.filters.colorVariety })).toBeVisible()
+    await expect(quickrow.getByRole('button', { name: t.fields.origin })).toBeVisible()
   })
 
-  test('Phone: Toggle öffnet und schließt den Filter-Drawer', async ({
+  test('Mehrfachauswahl erzeugt entfernbare Chips, „Alle löschen" setzt zurück', async ({
     page,
-  }, testInfo) => {
+  }) => {
     skipUnlessMock()
-    if (testInfo.project.name !== 'phone') return
-
     await gotoSection(page, de.nav.gerbils)
-    const toggle = page.locator('.filter-panel__toggle')
 
-    // Öffnen → Status-Feld wird sichtbar.
-    await toggle.click()
-    await expect(page.getByText(t.filters.status, { exact: true }).first()).toBeVisible()
+    // Default: Zucht-Chip ist aktiv.
+    await expect(page.locator('.rmf-chip-val', { hasText: t.statusLabels.Breeding })).toBeVisible()
 
-    // Schließen → wieder verborgen.
-    await toggle.click()
-    await expect(page.getByText(t.filters.status, { exact: true }).first()).not.toBeVisible()
+    // Geschlecht = männlich über das Sheet wählen → zweiter Chip erscheint.
+    await selectListFilter(page, t.filters.gender, t.genderLabels.male)
+    await expect(page.locator('.rmf-chip-val', { hasText: t.genderLabels.male })).toBeVisible()
+
+    // „Alle löschen" entfernt sämtliche Chips.
+    await page.getByRole('button', { name: de.filterBar.clearAll }).click()
+    await expect(page.locator('.rmf-chip')).toHaveCount(0)
   })
 
-  test('Phone: Badge zählt aktive Filter korrekt', async ({
-    page,
-  }, testInfo) => {
+  test('Einzelner Chip lässt sich per Klick entfernen', async ({ page }) => {
     skipUnlessMock()
-    if (testInfo.project.name !== 'phone') return
-
     await gotoSection(page, de.nav.gerbils)
-    const toggle = page.locator('.filter-panel__toggle')
 
-    // Initial: Status='Active' ist Default → Badge zeigt kein „(N)".
-    await expect(toggle).toHaveText('Filter')
-
-    // Filter-Drawer öffnen und Geschlecht setzen → 1 aktiver Filter.
-    await toggle.click()
-    await page.locator('.filter-panel__drawer select').nth(1).selectOption('male')
-    await expect(toggle).toHaveText('Filter (1)')
-
-    // Zurücksetzen → Badge weg.
-    await page.getByRole('button', { name: de.filterPanel.resetButton }).click()
-    await expect(toggle).toHaveText('Filter')
-  })
-
-  test('Desktop: Toggle-Button nicht sichtbar, alle Controls inline', async ({
-    page,
-  }, testInfo) => {
-    skipUnlessMock()
-    if (testInfo.project.name !== 'desktop') return
-
-    await gotoSection(page, de.nav.gerbils)
-    await expect(page.getByRole('heading', { name: t.title, exact: true })).toBeVisible()
-
-    // Kein Toggle-Button auf Desktop (display:none via Media Query).
-    const toggle = page.locator('.filter-panel__toggle')
-    await expect(toggle).toBeHidden()
-
-    // Status-Beschriftung direkt sichtbar.
-    await expect(page.getByText(t.filters.status, { exact: true }).first()).toBeVisible()
+    const breedingChip = page.locator('.rmf-chip', {
+      has: page.locator('.rmf-chip-val', { hasText: t.statusLabels.Breeding }),
+    })
+    await expect(breedingChip).toBeVisible()
+    await breedingChip.click()
+    await expect(breedingChip).toHaveCount(0)
   })
 })
diff --git a/gerbil-manager-web/e2e/fixtures.ts b/gerbil-manager-web/e2e/fixtures.ts
index a1715cc..35e870d 100644
--- a/gerbil-manager-web/e2e/fixtures.ts
+++ b/gerbil-manager-web/e2e/fixtures.ts
@@ -86,6 +86,18 @@ export async function openFilterPanel(page: Page) {
   }
 }
 
+/**
+ * DESIGN (Rennmaus Filter): wählt einen Wert im Quick-Chips-Filter der Rennmäuse-Liste.
+ * Öffnet das Bottom-Sheet der Kategorie, hakt die Option an und schließt mit „Fertig".
+ */
+export async function selectListFilter(page: Page, categoryLabel: string, optionLabel: string) {
+  // Pille der Kategorie in der Quick-Chips-Reihe öffnen (nicht den aktiven Chip treffen).
+  await page.locator('.rmf-quickrow').getByRole('button', { name: categoryLabel }).click()
+  const sheet = page.getByRole('dialog', { name: categoryLabel })
+  await sheet.getByRole('button', { name: optionLabel, exact: true }).click()
+  await sheet.getByRole('button', { name: de.filterBar.done }).click()
+}
+
 /** Eindeutiger Name für LIVE-taugliche Create-Flows. */
 export const uniqueName = (prefix: string) =>
   `${prefix} E2E ${Date.now().toString(36)}${Math.random().toString(36).slice(2, 6)}`
diff --git a/gerbil-manager-web/e2e/navigation.spec.ts b/gerbil-manager-web/e2e/navigation.spec.ts
index 9d9b6a2..e90dbef 100644
--- a/gerbil-manager-web/e2e/navigation.spec.ts
+++ b/gerbil-manager-web/e2e/navigation.spec.ts
@@ -3,7 +3,7 @@ import { de, expect, gotoSection, test } from './fixtures'
 
 test('alle Bereiche sind über die Navigation erreichbar', async ({ page }) => {
   await page.goto('/')
-  await expect(page.getByRole('heading', { name: de.app.title })).toBeVisible()
+  // DESIGN: the top "Rennmaus-Manager" title bar was removed — the page heading remains.
   await expect(page.getByRole('heading', { name: de.pages.gerbils.title, exact: true })).toBeVisible()
 
   await gotoSection(page, de.nav.gerbils)
diff --git a/gerbil-manager-web/e2e/status-model.spec.ts b/gerbil-manager-web/e2e/status-model.spec.ts
index 9924b9a..7a26961 100644
--- a/gerbil-manager-web/e2e/status-model.spec.ts
+++ b/gerbil-manager-web/e2e/status-model.spec.ts
@@ -37,10 +37,8 @@ test('Tier-Formular zeigt abgeleiteten Status Verstorben als Text + Hinweis', as
 test('Tiere-Liste zeigt Zucht als Standard-Status-Filter', async ({ page }) => {
   skipUnlessMock()
   await page.goto('/rennmaeuse')
-  const statusSelect = page
-    .locator('label.field', { has: page.locator(`span:text-is("${t.filters.status}")`) })
-    .locator('select')
-  await expect(statusSelect).toHaveValue('Breeding')
+  // DESIGN (Rennmaus Filter): der Default-Status erscheint als aktiver, entfernbarer Chip.
+  await expect(page.locator('.rmf-chip-val', { hasText: t.statusLabels.Breeding })).toBeVisible()
 })
 
 test('Neues Tier anlegen mit Status Liebhaber', async ({ page }) => {
diff --git a/gerbil-manager-web/e2e/tiere.spec.ts b/gerbil-manager-web/e2e/tiere.spec.ts
index 30868d5..18304c0 100644
--- a/gerbil-manager-web/e2e/tiere.spec.ts
+++ b/gerbil-manager-web/e2e/tiere.spec.ts
@@ -1,5 +1,5 @@
 /** QA-1: Tiere (Rennmäuse) — Liste/Suche, CRUD, Detail-Tabs (FEAT-1 + FEAT-6). */
-import { de, expect, gotoSection, openFilterPanel, skipUnlessMock, test, uniqueName } from './fixtures'
+import { de, expect, gotoSection, selectListFilter, skipUnlessMock, test, uniqueName } from './fixtures'
 
 const t = de.pages.gerbils
 const tabs = de.pages.tierTabs
@@ -23,13 +23,9 @@ test('Herkunft-Filter (originBreeder) zeigt nur Tiere der gewählten Zucht (SEAR
   await expect(page.getByRole('link', { name: /Krümel/ })).toBeVisible()
   await expect(page.getByRole('link', { name: /Fridolin/ })).toBeVisible()
 
-  // UX-MOBILE-1: Herkunft-Select liegt im Filter-Drawer — auf Mobil erst öffnen.
-  await openFilterPanel(page)
-  // Herkunft (originBreeder) auf die Seed-Zucht 'Clan-Kleine-Chaoten' (nur Krümel).
-  await page
-    .locator('label.field', { has: page.locator(`span:text-is("${t.fields.origin}")`) })
-    .locator('select')
-    .selectOption({ label: 'Clan-Kleine-Chaoten' })
+  // DESIGN (Rennmaus Filter): Herkunft (originBreeder) über das Quick-Chips-Sheet
+  // auf die Seed-Zucht 'Clan-Kleine-Chaoten' (nur Krümel) filtern.
+  await selectListFilter(page, t.fields.origin, 'Clan-Kleine-Chaoten')
 
   await expect(page.getByRole('link', { name: /Krümel/ })).toBeVisible()
   await expect(page.getByRole('link', { name: /Fridolin/ })).toBeHidden()
diff --git a/gerbil-manager-web/index.html b/gerbil-manager-web/index.html
index ca4ca6a..6cd7487 100644
--- a/gerbil-manager-web/index.html
+++ b/gerbil-manager-web/index.html
@@ -5,6 +5,13 @@
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <meta name="description" content="Verwaltung für Rennmäuse, Würfe und Züchter" />
+    <!-- DESIGN (Rennmaus Filter): Hanken Grotesk als App-Schrift. -->
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link
+      href="https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@400;500;600;700;800&display=swap"
+      rel="stylesheet"
+    />
     <title>Rennmaus-Manager</title>
   </head>
   <body>
diff --git a/gerbil-manager-web/src/api/gridify.ts b/gerbil-manager-web/src/api/gridify.ts
index cbb1c0c..b7391de 100644
--- a/gerbil-manager-web/src/api/gridify.ts
+++ b/gerbil-manager-web/src/api/gridify.ts
@@ -61,6 +61,23 @@ export function andFilter(...conditions: Array<string | null | undefined | false
   return conditions.filter((c): c is string => Boolean(c)).join(',')
 }
 
+/**
+ * Build an OR-group of conditions for one field, e.g. `(status=Breeding|status=ForSale)`.
+ * Used for multi-select filters: several allowed values within one category are OR'd,
+ * while categories are AND'd together by {@link andFilter}.
+ * Returns '' for an empty value list (so andFilter drops it); a single value needs no parens.
+ */
+export function orGroup(
+  field: string,
+  values: ReadonlyArray<string | number | boolean>,
+  op: GridifyOp = '==',
+): string {
+  const parts = values.map((value) => condition({ field, op, value }))
+  if (parts.length === 0) return ''
+  if (parts.length === 1) return parts[0]
+  return `(${parts.join('|')})`
+}
+
 /** Assemble the URL query string ("?...") from a GridifyQuery. */
 export function toQueryString(q: GridifyQuery): string {
   const params = new URLSearchParams()
diff --git a/gerbil-manager-web/src/components/AppShell.tsx b/gerbil-manager-web/src/components/AppShell.tsx
index 06b2c93..22dea28 100644
--- a/gerbil-manager-web/src/components/AppShell.tsx
+++ b/gerbil-manager-web/src/components/AppShell.tsx
@@ -47,11 +47,6 @@ export default function AppShell() {
 
   return (
     <div className="app-shell">
-      <header className="app-header">
-        <span className="app-logo" aria-hidden="true"><GerbilIcon size="1.5rem" /></span>
-        <h1 className="app-title">{de.app.title}</h1>
-      </header>
-
       <nav className="app-nav" aria-label={de.nav.mainNavigation}>
         <div className="nav-primary">
           {PRIMARY.map((item) => (
diff --git a/gerbil-manager-web/src/components/GerbilFilterBar.tsx b/gerbil-manager-web/src/components/GerbilFilterBar.tsx
new file mode 100644
index 0000000..84865cc
--- /dev/null
+++ b/gerbil-manager-web/src/components/GerbilFilterBar.tsx
@@ -0,0 +1,271 @@
+/**
+ * DESIGN (Rennmaus Filter.html): mobile-first filter UX —
+ *   1. a horizontal "Quick-Chips" pill row (one pill per category, with a count badge),
+ *   2. tapping a pill opens a bottom-sheet of multi-select options (✓ checkboxes,
+ *      searchable for long lists like Farbschlag / Herkunft),
+ *   3. active selections appear ABOVE the list as removable chips (so they scroll
+ *      away with the list), with "Alle löschen".
+ *
+ * The user landed on the Quick-Chips concept, dezent style, brown accent. Colors
+ * come from the app's existing tokens. `GerbilFilterBar` is the pill row + sheet;
+ * `ActiveFilterChips` renders the removable chips and is placed above the list.
+ */
+import { useEffect, useMemo, useState, type CSSProperties, type ReactNode } from 'react'
+import { createPortal } from 'react-dom'
+import { de } from '../strings/de'
+import './gerbilFilterBar.css'
+
+export interface FilterOption {
+  value: string
+  label: string
+  /** Optional swatch dot (used for status colors). */
+  color?: string
+  /** Optional leading symbol (used for gender ♂ ♀ ?). */
+  symbol?: string
+}
+
+export interface FilterCategory {
+  /** Matches the Gridify field / the key into the selected map. */
+  key: string
+  label: string
+  /** Renders a search box above the option list (for long lists). */
+  searchable?: boolean
+  options: FilterOption[]
+}
+
+function countFor(selected: Record<string, string[]>, key: string): number {
+  return (selected[key] ?? []).length
+}
+
+interface GerbilFilterBarProps {
+  categories: FilterCategory[]
+  selected: Record<string, string[]>
+  onToggle: (key: string, value: string) => void
+}
+
+/** The Quick-Chips pill row + the category bottom-sheet. */
+export function GerbilFilterBar({ categories, selected, onToggle }: GerbilFilterBarProps) {
+  const t = de.filterBar
+  const [activeKey, setActiveKey] = useState<string | null>(null)
+  const activeCat = categories.find((c) => c.key === activeKey) ?? null
+
+  return (
+    <div className="rmf">
+      <div className="rmf-quickrow" role="group" aria-label={t.title}>
+        {categories.map((cat) => {
+          const n = countFor(selected, cat.key)
+          return (
+            <button
+              key={cat.key}
+              type="button"
+              className={'rmf-pill' + (n > 0 ? ' is-on' : '')}
+              onClick={() => setActiveKey(cat.key)}
+              aria-haspopup="dialog"
+            >
+              {cat.label}
+              {n > 0 && <span className="rmf-pill-count">{n}</span>}
+              <span className="rmf-pill-chev" aria-hidden="true">▾</span>
+            </button>
+          )
+        })}
+      </div>
+
+      {activeCat && (
+        <FilterSheet
+          cat={activeCat}
+          selected={selected[activeCat.key] ?? []}
+          onToggle={onToggle}
+          onClose={() => setActiveKey(null)}
+        />
+      )}
+    </div>
+  )
+}
+
+interface ActiveFilterChipsProps {
+  categories: FilterCategory[]
+  selected: Record<string, string[]>
+  onRemove: (key: string, value: string) => void
+  onClearAll: () => void
+  /** Optional per-chip accent colour (e.g. status colours); falls back to the app accent. */
+  chipColor?: (key: string, value: string) => string | undefined
+}
+
+/**
+ * Removable chips for the active selections, placed above the list so they scroll
+ * away as you browse. Wraps onto multiple lines — nothing is hidden.
+ */
+export function ActiveFilterChips({
+  categories,
+  selected,
+  onRemove,
+  onClearAll,
+  chipColor,
+}: ActiveFilterChipsProps) {
+  const t = de.filterBar
+
+  const chips = categories.flatMap((cat) => {
+    const labelByValue = new Map(cat.options.map((o) => [o.value, o.label]))
+    return (selected[cat.key] ?? []).map((value) => ({
+      key: cat.key,
+      value,
+      catLabel: cat.label,
+      label: labelByValue.get(value) ?? value,
+    }))
+  })
+
+  if (chips.length === 0) return null
+
+  return (
+    <div className="rmf-chips">
+      {chips.map((c) => {
+        const accent = chipColor?.(c.key, c.value)
+        return (
+          <button
+            key={c.key + c.value}
+            type="button"
+            className="rmf-chip"
+            style={accent ? ({ '--chip': accent } as CSSProperties) : undefined}
+            onClick={() => onRemove(c.key, c.value)}
+            aria-label={`${c.catLabel}: ${c.label} — ${t.remove}`}
+          >
+            <span className="rmf-chip-cat">{c.catLabel}</span>
+            <span className="rmf-chip-val">{c.label}</span>
+            <span className="rmf-chip-x" aria-hidden="true">×</span>
+          </button>
+        )
+      })}
+      {chips.length > 1 && (
+        <button type="button" className="rmf-chip rmf-chip-clear" onClick={onClearAll}>
+          {t.clearAll}
+        </button>
+      )}
+    </div>
+  )
+}
+
+interface BottomSheetProps {
+  title: string
+  onClose: () => void
+  children: ReactNode
+}
+
+/**
+ * Reusable bottom-sheet: dimmed scrim + slide-up panel with grip, title and a
+ * "Fertig" button. Locks body scroll and closes on Escape / scrim tap. Used for
+ * the category filters AND the sort selector (same drawer mechanic).
+ */
+export function BottomSheet({ title, onClose, children }: BottomSheetProps) {
+  const t = de.filterBar
+
+  useEffect(() => {
+    const prev = document.body.style.overflow
+    document.body.style.overflow = 'hidden'
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') onClose()
+    }
+    window.addEventListener('keydown', onKey)
+    return () => {
+      document.body.style.overflow = prev
+      window.removeEventListener('keydown', onKey)
+    }
+  }, [onClose])
+
+  // Portal to <body> so the sheet escapes any sticky/stacking-context ancestor
+  // (e.g. the sticky header) and renders above the bottom action bar.
+  return createPortal(
+    <div className="rmf-scrim" onClick={onClose} role="presentation">
+      <div
+        className="rmf-sheet"
+        role="dialog"
+        aria-modal="true"
+        aria-label={title}
+        onClick={(e) => e.stopPropagation()}
+      >
+        <div className="rmf-grip" aria-hidden="true" />
+        <div className="rmf-sheet-head">
+          <span className="rmf-sheet-title">{title}</span>
+          <button type="button" className="rmf-sheet-done" onClick={onClose}>
+            {t.done}
+          </button>
+        </div>
+        <div className="rmf-sheet-body">{children}</div>
+      </div>
+    </div>,
+    document.body,
+  )
+}
+
+interface FilterSheetProps {
+  cat: FilterCategory
+  selected: string[]
+  onToggle: (key: string, value: string) => void
+  onClose: () => void
+}
+
+function FilterSheet({ cat, selected, onToggle, onClose }: FilterSheetProps) {
+  return (
+    <BottomSheet title={cat.label} onClose={onClose}>
+      <OptionList cat={cat} selected={selected} onToggle={onToggle} />
+    </BottomSheet>
+  )
+}
+
+interface OptionListProps {
+  cat: FilterCategory
+  selected: string[]
+  onToggle: (key: string, value: string) => void
+}
+
+function OptionList({ cat, selected, onToggle }: OptionListProps) {
+  const t = de.filterBar
+  const [q, setQ] = useState('')
+
+  const options = useMemo(() => {
+    if (!cat.searchable) return cat.options
+    const term = q.trim().toLowerCase()
+    if (!term) return cat.options
+    return cat.options.filter((o) => o.label.toLowerCase().includes(term))
+  }, [cat, q])
+
+  return (
+    <div className="rmf-picker">
+      {cat.searchable && (
+        <input
+          className="rmf-search"
+          placeholder={t.searchPlaceholder}
+          value={q}
+          onChange={(e) => setQ(e.target.value)}
+          autoFocus
+          aria-label={t.searchPlaceholder}
+        />
+      )}
+      <div className={'rmf-optlist' + (cat.searchable ? ' rmf-optlist--scroll' : '')}>
+        {options.length === 0 && <div className="rmf-empty">{t.noMatch}</div>}
+        {options.map((o) => {
+          const on = selected.includes(o.value)
+          return (
+            <button
+              key={o.value}
+              type="button"
+              className={'rmf-opt' + (on ? ' is-on' : '')}
+              onClick={() => onToggle(cat.key, o.value)}
+              aria-pressed={on}
+            >
+              <span className="rmf-opt-box" aria-hidden="true">
+                {on ? '✓' : ''}
+              </span>
+              {o.color && <span className="rmf-opt-dot" style={{ background: o.color }} />}
+              {o.symbol && (
+                <span className="rmf-opt-sym" aria-hidden="true">
+                  {o.symbol}
+                </span>
+              )}
+              <span className="rmf-opt-label">{o.label}</span>
+            </button>
+          )
+        })}
+      </div>
+    </div>
+  )
+}
diff --git a/gerbil-manager-web/src/components/NameSuggestPanel.css b/gerbil-manager-web/src/components/NameSuggestPanel.css
index 5b26554..23fb16b 100644
--- a/gerbil-manager-web/src/components/NameSuggestPanel.css
+++ b/gerbil-manager-web/src/components/NameSuggestPanel.css
@@ -43,6 +43,39 @@
   width: 5rem;
 }
 
+.namegen-panel__gender {
+  display: flex;
+  flex-direction: column;
+  gap: 0.25rem;
+}
+
+.namegen-gender-group {
+  display: inline-flex;
+  border: 1px solid var(--color-border);
+  border-radius: 0.4rem;
+  overflow: hidden;
+}
+
+.namegen-gender-btn {
+  background: none;
+  border: none;
+  border-left: 1px solid var(--color-border);
+  padding: 0.35rem 0.7rem;
+  font: inherit;
+  font-size: 0.9rem;
+  cursor: pointer;
+  color: var(--color-text);
+}
+
+.namegen-gender-btn:first-child {
+  border-left: none;
+}
+
+.namegen-gender-btn.is-active {
+  background: var(--color-accent, #2563eb);
+  color: #fff;
+}
+
 .namegen-panel__usages {
   display: flex;
   flex-direction: column;
diff --git a/gerbil-manager-web/src/components/NameSuggestPanel.tsx b/gerbil-manager-web/src/components/NameSuggestPanel.tsx
index 1927d35..248b443 100644
--- a/gerbil-manager-web/src/components/NameSuggestPanel.tsx
+++ b/gerbil-manager-web/src/components/NameSuggestPanel.tsx
@@ -12,9 +12,17 @@ interface NameSuggestPanelProps {
 
 const ALL_CODES = NAMEGEN_USAGES.map((u) => u.code) as NamegenUsageCode[]
 
+type GenderSelection = 'any' | 'female' | 'male'
+
+/** Map the gerbil form's gender onto the generator's three-way choice. */
+function seedGender(gender: string): GenderSelection {
+  return gender === 'female' || gender === 'male' ? gender : 'any'
+}
+
 export default function NameSuggestPanel({ gender, onPick, onClose }: NameSuggestPanelProps) {
   const t = de.namegen
   const [letter, setLetter] = useState('')
+  const [genderSel, setGenderSel] = useState<GenderSelection>(() => seedGender(gender))
   const [usages, setUsages] = useState<Set<NamegenUsageCode>>(new Set(ALL_CODES))
   const [loading, setLoading] = useState(false)
   const [keyMissing, setKeyMissing] = useState(false)
@@ -39,7 +47,7 @@ export default function NameSuggestPanel({ gender, onPick, onClose }: NameSugges
     try {
       const result = await suggestNames({
         letter: letter.trim() || undefined,
-        gender: gender || undefined,
+        gender: genderSel === 'any' ? undefined : genderSel,
         usages: [...usages] as NamegenUsageCode[],
         count: 6,
       })
@@ -78,6 +86,28 @@ export default function NameSuggestPanel({ gender, onPick, onClose }: NameSugges
           />
         </div>
 
+        <div className="namegen-panel__gender">
+          <span>{t.genderLabel}</span>
+          <div className="namegen-gender-group" role="radiogroup" aria-label={t.genderLabel}>
+            {([
+              ['any', t.genderAny],
+              ['female', t.genderFemale],
+              ['male', t.genderMale],
+            ] as const).map(([value, label]) => (
+              <button
+                key={value}
+                type="button"
+                role="radio"
+                aria-checked={genderSel === value}
+                className={`namegen-gender-btn ${genderSel === value ? 'is-active' : ''}`}
+                onClick={() => setGenderSel(value)}
+              >
+                {label}
+              </button>
+            ))}
+          </div>
+        </div>
+
         <div className="namegen-panel__usages">
           <span>{t.usagesLabel}</span>
           <div className="namegen-usages-grid">
diff --git a/gerbil-manager-web/src/components/gerbilFilterBar.css b/gerbil-manager-web/src/components/gerbilFilterBar.css
new file mode 100644
index 0000000..b0a935f
--- /dev/null
+++ b/gerbil-manager-web/src/components/gerbilFilterBar.css
@@ -0,0 +1,427 @@
+/* DESIGN (Rennmaus Filter.html): Quick-Chips + Bottom-Sheet + entfernbare Chips.
+   Mobile-first. Palette + font sizes are taken 1:1 from the design (the app tokens
+   are now the design's creme/brown/terracotta), so this matches the prototype. */
+
+.rmf {
+  --rmf-ease: cubic-bezier(0.22, 1, 0.36, 1);
+  margin: 0.5rem 0 0.25rem;
+}
+
+/* ---------- Quick-Chips pill row ---------- */
+.rmf-quickrow {
+  display: flex;
+  gap: 0.5rem;
+  overflow-x: auto;
+  padding: 2px 0 4px;
+  scrollbar-width: none;
+  -webkit-overflow-scrolling: touch;
+}
+.rmf-quickrow::-webkit-scrollbar {
+  display: none;
+}
+.rmf-pill {
+  flex-shrink: 0;
+  cursor: pointer;
+  font: inherit;
+  background: #fff;
+  border: 1px solid var(--color-border);
+  color: var(--color-text);
+  padding: 9px 13px;
+  border-radius: 999px;
+  font-size: 14px;
+  font-weight: 600;
+  display: inline-flex;
+  align-items: center;
+  gap: 0.375rem;
+  box-shadow: var(--shadow);
+  transition: transform 0.12s var(--rmf-ease), border-color 0.15s, color 0.15s, background 0.15s;
+}
+.rmf-pill:active {
+  transform: scale(0.94);
+}
+.rmf-pill.is-on {
+  border-color: var(--color-accent);
+  color: var(--color-accent);
+  background: var(--color-accent-soft);
+}
+.rmf-pill-count {
+  background: var(--color-accent);
+  color: #fff;
+  font-size: 11px;
+  font-weight: 800;
+  min-width: 18px;
+  height: 18px;
+  padding: 0 5px;
+  border-radius: 9px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
+.rmf-pill-chev {
+  font-size: 11px;
+  color: var(--color-text-faint);
+}
+
+/* ---------- Active filter chips ---------- */
+.rmf-chips {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.5rem;
+  margin-top: 0.625rem;
+}
+.rmf-chip {
+  --chip: var(--color-accent);
+  cursor: pointer;
+  font: inherit;
+  display: inline-flex;
+  align-items: center;
+  gap: 0.375rem;
+  background: color-mix(in srgb, var(--chip) 12%, #fff);
+  border: 1px solid color-mix(in srgb, var(--chip) 32%, transparent);
+  color: color-mix(in srgb, var(--chip) 78%, #2b2723);
+  padding: 6px 8px 6px 11px;
+  border-radius: 999px;
+  font-size: 13px;
+  font-weight: 600;
+  white-space: nowrap;
+  animation: rmfChipIn 0.22s var(--rmf-ease);
+  transition: transform 0.1s;
+}
+.rmf-chip:active {
+  transform: scale(0.94);
+}
+.rmf-chip-cat {
+  font-size: 11px;
+  font-weight: 700;
+  opacity: 0.6;
+  text-transform: uppercase;
+  letter-spacing: 0.03em;
+}
+.rmf-chip-val {
+  font-weight: 700;
+}
+.rmf-chip-x {
+  font-size: 15px;
+  line-height: 1;
+  width: 17px;
+  height: 17px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  background: color-mix(in srgb, var(--chip) 22%, transparent);
+  border-radius: 50%;
+}
+.rmf-chip-clear {
+  background: transparent;
+  border: 1px solid var(--color-border);
+  color: var(--color-text-muted);
+}
+.rmf-chip-clear .rmf-chip-x {
+  display: none;
+}
+@keyframes rmfChipIn {
+  from {
+    opacity: 0;
+    transform: scale(0.8);
+  }
+  to {
+    opacity: 1;
+    transform: scale(1);
+  }
+}
+
+/* ---------- Bottom-Sheet ---------- */
+.rmf-scrim {
+  position: fixed;
+  inset: 0;
+  z-index: 60;
+  background: rgba(43, 33, 25, 0.42);
+  display: flex;
+  align-items: flex-end;
+  justify-content: center;
+  animation: rmfScrim 0.2s ease;
+}
+@keyframes rmfScrim {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+.rmf-sheet {
+  width: 100%;
+  max-width: 460px;
+  background: var(--color-bg);
+  border-radius: 22px 22px 0 0;
+  max-height: 82vh;
+  display: flex;
+  flex-direction: column;
+  box-shadow: 0 -8px 40px rgba(43, 33, 25, 0.25);
+  animation: rmfSheetUp 0.32s var(--rmf-ease);
+}
+@keyframes rmfSheetUp {
+  from {
+    transform: translateY(100%);
+  }
+  to {
+    transform: translateY(0);
+  }
+}
+.rmf-grip {
+  width: 40px;
+  height: 4px;
+  border-radius: 2px;
+  background: var(--color-text-faint);
+  opacity: 0.5;
+  margin: 9px auto 4px;
+}
+.rmf-sheet-head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 0.375rem 1rem 0.75rem;
+  border-bottom: 1px solid var(--color-border);
+}
+.rmf-sheet-title {
+  font-size: 18px;
+  font-weight: 800;
+  color: var(--color-text);
+}
+.rmf-sheet-done {
+  background: var(--color-accent);
+  color: #fff;
+  border: none;
+  font: inherit;
+  font-weight: 700;
+  font-size: 14px;
+  padding: 0.5rem 1rem;
+  border-radius: 999px;
+  cursor: pointer;
+}
+.rmf-sheet-body {
+  overflow-y: auto;
+  padding: 0.5rem 1rem 1.5rem;
+  -webkit-overflow-scrolling: touch;
+}
+
+/* ---------- Option list (multi-select checkboxes) ---------- */
+.rmf-picker {
+  display: flex;
+  flex-direction: column;
+}
+.rmf-search {
+  width: 100%;
+  border: 1px solid var(--color-border);
+  background: #fff;
+  border-radius: 14px;
+  padding: 0.75rem 0.875rem;
+  font: inherit;
+  font-size: 1rem;
+  color: var(--color-text);
+  outline: none;
+  margin: 0.25rem 0 0.375rem;
+}
+.rmf-search:focus {
+  border-color: var(--color-accent);
+}
+.rmf-optlist {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  padding-top: 4px;
+}
+.rmf-optlist--scroll {
+  max-height: 46vh;
+  overflow-y: auto;
+}
+.rmf-opt {
+  display: flex;
+  align-items: center;
+  gap: 0.7rem;
+  background: none;
+  border: none;
+  font: inherit;
+  padding: 0.75rem 0.375rem;
+  cursor: pointer;
+  color: var(--color-text);
+  font-size: 1rem;
+  font-weight: 500;
+  text-align: left;
+  width: 100%;
+  border-radius: 10px;
+  transition: background 0.12s;
+}
+.rmf-opt:hover {
+  background: var(--color-accent-soft);
+}
+.rmf-opt.is-on {
+  font-weight: 700;
+}
+.rmf-opt-box {
+  flex-shrink: 0;
+  width: 24px;
+  height: 24px;
+  border-radius: 7px;
+  border: 1.5px solid var(--color-border);
+  background: #fff;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 14px;
+  color: #fff;
+  font-weight: 800;
+  transition: background 0.14s, border-color 0.14s;
+}
+.rmf-opt.is-on .rmf-opt-box {
+  background: var(--color-accent);
+  border-color: var(--color-accent);
+}
+.rmf-opt-dot {
+  width: 12px;
+  height: 12px;
+  border-radius: 50%;
+  flex-shrink: 0;
+}
+.rmf-opt-sym {
+  width: 22px;
+  text-align: center;
+  font-size: 16px;
+  color: var(--color-text-muted);
+}
+.rmf-opt-label {
+  flex: 1;
+}
+.rmf-empty {
+  padding: 1.1rem 0.375rem;
+  color: var(--color-text-muted);
+  font-size: 15px;
+}
+
+/* ---------- Search bar ---------- */
+.rmf-searchbar {
+  margin-top: 0.75rem;
+  position: relative;
+  display: flex;
+  align-items: center;
+  background: #fff;
+  border: 1px solid var(--color-border);
+  border-radius: 14px;
+  box-shadow: var(--shadow);
+}
+.rmf-search-ico {
+  padding-left: 0.875rem;
+  font-size: 19px;
+  color: var(--color-text-faint);
+}
+.rmf-searchfield {
+  flex: 1;
+  border: none;
+  background: transparent;
+  outline: none;
+  font: inherit;
+  font-size: 16px;
+  color: var(--color-text);
+  padding: 0.875rem 0.75rem;
+  min-width: 0;
+}
+.rmf-searchfield::placeholder {
+  color: var(--color-text-faint);
+}
+.rmf-search-clear {
+  border: none;
+  background: var(--color-accent-soft);
+  color: var(--color-text-muted);
+  width: 24px;
+  height: 24px;
+  border-radius: 50%;
+  margin-right: 0.625rem;
+  font-size: 1rem;
+  line-height: 1;
+  cursor: pointer;
+  flex-shrink: 0;
+}
+
+/* ---------- Bar: Externe-Ahnen toggle + Sortieren — two equal-width chips ---------- */
+.rm-bar {
+  display: flex;
+  align-items: stretch;
+  gap: 0.5rem;
+  margin-top: 0.625rem;
+}
+
+/* Shared pill: both chips are the SAME size (flex: 1 → equal width). */
+.rmf-bar-chip {
+  flex: 1 1 0;
+  min-width: 0;
+  cursor: pointer;
+  font: inherit;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+  background: #fff;
+  border: 1px solid var(--color-border);
+  color: var(--color-text-muted);
+  padding: 8px 12px;
+  border-radius: 999px;
+  font-size: 13px;
+  font-weight: 600;
+  white-space: nowrap;
+  box-shadow: var(--shadow);
+  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.1s;
+}
+.rmf-bar-chip:active {
+  transform: scale(0.97);
+}
+/* Externe-Ahnen active state. */
+.rmf-bar-chip.is-on {
+  background: var(--color-accent-soft);
+  border-color: color-mix(in srgb, var(--color-accent) 32%, transparent);
+  color: color-mix(in srgb, var(--color-accent) 78%, #2b2723);
+}
+.rmf-bar-chip-label {
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.rmf-bar-chip-ico {
+  color: var(--color-accent);
+  font-weight: 800;
+}
+.rmf-bar-chip-chev {
+  font-size: 11px;
+  color: var(--color-text-faint);
+}
+
+/* Toggle icon circle on the Externe-Ahnen chip (+ → ✓). */
+.rmf-chip-toggle-ico {
+  font-size: 14px;
+  line-height: 1;
+  width: 17px;
+  height: 17px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 50%;
+  font-weight: 800;
+  background: color-mix(in srgb, var(--color-accent) 14%, transparent);
+  color: var(--color-accent);
+  transition: background 0.15s, color 0.15s;
+}
+.rmf-bar-chip.is-on .rmf-chip-toggle-ico {
+  background: var(--color-accent);
+  color: #fff;
+}
+
+/* Desktop: the sheet becomes a centered modal rather than a bottom drawer. */
+@media (min-width: 768px) {
+  .rmf-scrim {
+    align-items: center;
+  }
+  .rmf-sheet {
+    border-radius: 18px;
+    max-width: 420px;
+    max-height: 70vh;
+    animation: rmfChipIn 0.2s var(--rmf-ease);
+  }
+}
diff --git a/gerbil-manager-web/src/hooks/useApi.ts b/gerbil-manager-web/src/hooks/useApi.ts
index b0dc883..a73ee90 100644
--- a/gerbil-manager-web/src/hooks/useApi.ts
+++ b/gerbil-manager-web/src/hooks/useApi.ts
@@ -21,7 +21,7 @@ export interface AsyncState<T> {
   reload: () => void
 }
 
-function messageFor(err: unknown): string {
+export function messageFor(err: unknown): string {
   if (err instanceof ApiError) return err.message
   if (err instanceof Error && err.message) return err.message
   return de.api.errors.unknown
diff --git a/gerbil-manager-web/src/hooks/useInfiniteList.ts b/gerbil-manager-web/src/hooks/useInfiniteList.ts
new file mode 100644
index 0000000..4dcab88
--- /dev/null
+++ b/gerbil-manager-web/src/hooks/useInfiniteList.ts
@@ -0,0 +1,116 @@
+/**
+ * Server-paginated infinite list (no react-query).
+ *
+ * `loader(page)` fetches ONE page; pages are accumulated into `items`. The list
+ * never loads everything up front — `loadMore()` (wired to a scroll sentinel)
+ * advances exactly one page at a time until `hasMore` is false.
+ *
+ * Changing `resetKey` (e.g. the filter/sort/search signature) clears the list and
+ * reloads from page 1. `reload()` re-fetches page 1 on demand (e.g. retry).
+ *
+ * Design mirrors useApi (and satisfies the strict react-hooks rules):
+ *  - the request signature lives in `req`; the query reset on `resetKey` change is
+ *    an in-render state adjustment (not a setState-in-effect), so no cascade.
+ *  - `loading` / `loadingMore` are DERIVED from resolved-vs-current request keys,
+ *    never set synchronously inside the fetch effect.
+ *  - the loader is read through a ref so the effect keys purely on the request id.
+ */
+import { useCallback, useEffect, useRef, useState } from 'react'
+import { messageFor } from './useApi'
+import type { Paged } from '../api/types'
+
+export interface InfiniteListState<T> {
+  items: T[]
+  total: number
+  /** Initial / reset load (page 1) in flight. */
+  loading: boolean
+  /** A subsequent page is being appended. */
+  loadingMore: boolean
+  error: string | null
+  hasMore: boolean
+  /** Advance one page; the scroll sentinel calls this. */
+  loadMore: () => void
+  /** Re-fetch from page 1 (retry). */
+  reload: () => void
+}
+
+interface Req {
+  key: string
+  page: number
+  nonce: number
+}
+
+interface Resolved<T> {
+  reqId: string
+  items: T[]
+  total: number
+  error: string | null
+}
+
+export function useInfiniteList<T>(
+  loader: (page: number) => Promise<Paged<T>>,
+  resetKey: string,
+): InfiniteListState<T> {
+  const loaderRef = useRef(loader)
+  useEffect(() => {
+    loaderRef.current = loader
+  })
+
+  const [req, setReq] = useState<Req>({ key: resetKey, page: 1, nonce: 0 })
+  // Adjust state during render when the query signature changes — the recommended
+  // pattern for deriving state from changed inputs (no setState-in-effect cascade).
+  if (req.key !== resetKey) {
+    setReq({ key: resetKey, page: 1, nonce: 0 })
+  }
+
+  const queryId = `${req.nonce}:${req.key}`
+  const reqId = `${queryId}#${req.page}`
+
+  const [resolved, setResolved] = useState<Resolved<T>>({
+    reqId: '',
+    items: [],
+    total: 0,
+    error: null,
+  })
+
+  useEffect(() => {
+    let cancelled = false
+    const page = req.page
+    const id = `${req.nonce}:${req.key}#${page}`
+    loaderRef
+      .current(page)
+      .then((res) => {
+        if (cancelled) return
+        setResolved((prev) => ({
+          reqId: id,
+          // page 1 replaces (fresh query); later pages append.
+          items: page === 1 ? res.items : [...prev.items, ...res.items],
+          total: res.totalCount,
+          error: null,
+        }))
+      })
+      .catch((err) => {
+        if (!cancelled) setResolved((prev) => ({ ...prev, reqId: id, error: messageFor(err) }))
+      })
+    return () => {
+      cancelled = true
+    }
+  }, [req]) // req is a fresh object per change (key/page/nonce) → one fetch per change
+
+  // Resolved data only counts if it belongs to the current query signature.
+  const resolvedQueryId = resolved.reqId.slice(0, resolved.reqId.lastIndexOf('#'))
+  const sameQuery = resolved.reqId !== '' && resolvedQueryId === queryId
+  const inFlight = resolved.reqId !== reqId
+
+  const items = sameQuery ? resolved.items : []
+  const total = sameQuery ? resolved.total : 0
+  const loading = !sameQuery || (inFlight && req.page === 1)
+  const loadingMore = sameQuery && inFlight && req.page > 1
+  const error = inFlight ? null : sameQuery ? resolved.error : null
+  const hasMore = sameQuery && !inFlight && items.length < total
+
+  const loadMore = useCallback(() => setReq((r) => ({ ...r, page: r.page + 1 })), [])
+  const reload = useCallback(() => setReq((r) => ({ key: r.key, page: 1, nonce: r.nonce + 1 })), [])
+
+  return { items, total, loading, loadingMore, error, hasMore, loadMore, reload }
+}
diff --git a/gerbil-manager-web/src/index.css b/gerbil-manager-web/src/index.css
index ddece1a..c45ebe0 100644
--- a/gerbil-manager-web/src/index.css
+++ b/gerbil-manager-web/src/index.css
@@ -2,15 +2,20 @@
    Seitenleiste links ab 768px (Laptop). */
 
 :root {
-  --color-bg: #faf7f2;
+  /* DESIGN (Rennmaus Filter): the app palette is the design's creme/brown/terracotta. */
+  --color-bg: #f6efe2;
   --color-surface: #ffffff;
-  --color-border: #e5ddd0;
-  --color-text: #3b3026;
-  --color-text-muted: #8a7d6b;
-  --color-accent: #b5651d;
-  --color-accent-soft: #f6e7d7;
+  --color-border: #e7dcc8;
+  --color-text: #3d2e23;
+  --color-text-muted: #8c7f6e;
+  --color-text-faint: #b4a790;
+  --color-accent: #a85f2e;
+  --color-accent-soft: #f3e7da;
+  /* DESIGN (Rennmaus Filter): the single soft elevation used on cards, pills,
+     the search bar and buttons. */
+  --shadow: 0 1px 2px rgba(61, 46, 35, 0.06), 0 2px 8px rgba(61, 46, 35, 0.05);
 
-  font-family: system-ui, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
+  font-family: 'Hanken Grotesk', system-ui, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
   line-height: 1.5;
   color: var(--color-text);
   background-color: var(--color-bg);
@@ -41,46 +46,41 @@ a {
 
 /* --- Grundgerüst (Smartphone) --- */
 
+/* DESIGN: the top "Rennmaus-Manager" title bar is removed; on mobile only the
+   bottom action bar remains, on desktop the left sidebar.
+   The shell is a fixed viewport box and ONLY the main area scrolls — so the bottom
+   nav (mobile) and the sidebar (desktop) stay put, and the page header's
+   position: sticky pins reliably to the top of the scrolling main area. */
 .app-shell {
   display: grid;
-  min-height: 100dvh;
-  grid-template-rows: auto 1fr auto;
+  height: 100dvh;
+  overflow: hidden;
+  grid-template-rows: 1fr auto;
   grid-template-areas:
-    'header'
     'main'
     'nav';
 }
 
-.app-header {
-  grid-area: header;
-  display: flex;
-  align-items: center;
-  gap: 0.5rem;
-  padding: 0.75rem 1rem;
-  background: var(--color-surface);
-  border-bottom: 1px solid var(--color-border);
-  position: sticky;
-  top: 0;
-}
-
-.app-logo {
-  font-size: 1.5rem;
-}
-
-.app-title {
-  font-size: 1.15rem;
-  margin: 0;
-}
-
 .app-main {
   grid-area: main;
-  padding: 1rem;
+  /* No top padding: the page's sticky header pins flush to the top with no gap
+     (pages add their own top spacing via .page). */
+  padding: 0 1rem 1.5rem;
   max-width: 60rem;
   width: 100%;
-  /* UX-MOBILE-2: prevent any wide content (e.g. genotype table) from making
-     the page body scroll horizontally. The .genotype-table-scroll wrapper
-     provides the per-table horizontal scroll. */
+  /* MAIN is the scroll container: min-height:0 lets the 1fr grid row shrink below
+     its content so it can scroll. overflow-anchor:none stops the browser from
+     re-adjusting scroll when the sticky title collapses (no scroll "fight"). */
+  min-height: 0;
+  overflow-y: auto;
   overflow-x: hidden;
+  overflow-anchor: none;
+}
+
+/* Top spacing for page content (replaces the removed .app-main top padding). The
+   Rennmäuse page opts out — its sticky header provides its own top padding. */
+.page {
+  padding-top: 1rem;
 }
 
 /* Tab-Leiste unten */
@@ -92,6 +92,8 @@ a {
   border-top: 1px solid var(--color-border);
   position: sticky;
   bottom: 0;
+  /* Above the sticky page header + cards so it is never overlapped. */
+  z-index: 30;
   padding-bottom: env(safe-area-inset-bottom);
 }
 
@@ -122,10 +124,8 @@ a {
 @media (min-width: 768px) {
   .app-shell {
     grid-template-columns: 14rem 1fr;
-    grid-template-rows: auto 1fr;
-    grid-template-areas:
-      'header header'
-      'nav    main';
+    grid-template-rows: 1fr;
+    grid-template-areas: 'nav main';
   }
 
   .app-nav {
@@ -136,6 +136,9 @@ a {
     border-right: 1px solid var(--color-border);
     padding: 1rem 0.5rem;
     position: static;
+    /* Sidebar stays fixed; scrolls internally only if the link list is taller
+       than the viewport. */
+    overflow-y: auto;
   }
 
   .nav-link {
@@ -156,7 +159,7 @@ a {
   }
 
   .app-main {
-    padding: 1.5rem 2rem;
+    padding: 0 2rem 1.5rem;
   }
 }
 
diff --git a/gerbil-manager-web/src/pages/GerbilsPage.tsx b/gerbil-manager-web/src/pages/GerbilsPage.tsx
index 78888f0..b208591 100644
Binary files a/gerbil-manager-web/src/pages/GerbilsPage.tsx and b/gerbil-manager-web/src/pages/GerbilsPage.tsx differ
diff --git a/gerbil-manager-web/src/pages/gerbils.css b/gerbil-manager-web/src/pages/gerbils.css
index bf03b52..0400b58 100644
--- a/gerbil-manager-web/src/pages/gerbils.css
+++ b/gerbil-manager-web/src/pages/gerbils.css
@@ -1,33 +1,247 @@
 /* FEAT-12a multi-select on the Tiere list — page-scoped. */
 
+/* The sticky header supplies the top spacing, so opt out of the global .page top
+   padding (otherwise the bar wouldn't pin flush to the top). */
+.gerbils-page {
+  padding-top: 0;
+}
+
 .gerbil-row {
+  /* DESIGN (Rennmaus Filter): cards ease in (fade + slight rise) instead of popping
+     when the result set changes. React keys by id, so only newly-appearing rows
+     replay this; rows that persist across a filter change are reused and stay put. */
+  animation: gerbilRowIn 0.28s cubic-bezier(0.22, 1, 0.36, 1) both;
+}
+
+/* Light cascade so a fresh result set sweeps in rather than landing all at once.
+   Capped at the first handful of rows; the rest share the last delay. */
+.gerbil-row:nth-child(1) { animation-delay: 0s; }
+.gerbil-row:nth-child(2) { animation-delay: 0.03s; }
+.gerbil-row:nth-child(3) { animation-delay: 0.06s; }
+.gerbil-row:nth-child(4) { animation-delay: 0.09s; }
+.gerbil-row:nth-child(5) { animation-delay: 0.12s; }
+.gerbil-row:nth-child(6) { animation-delay: 0.15s; }
+.gerbil-row:nth-child(n + 7) { animation-delay: 0.18s; }
+
+@keyframes gerbilRowIn {
+  from {
+    opacity: 0;
+    transform: translateY(6px);
+  }
+  to {
+    opacity: 1;
+    transform: none;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .gerbil-row {
+    animation: none;
+  }
+}
+
+.rm-noresults {
+  text-align: center;
+  padding: 2.5rem 1rem;
   display: flex;
-  align-items: center;
-  gap: 0.6rem;
-}
-
-.gerbil-row__check {
-  width: 1.25rem;
-  height: 1.25rem;
-  min-height: 0;
-  flex: 0 0 auto;
-}
-
-.gerbil-row > .gerbil-card {
-  flex: 1;
-}
-
-.bulk-bar {
-  display: flex;
+  flex-direction: column;
   align-items: center;
   gap: 0.75rem;
-  flex-wrap: wrap;
-  padding: 0.6rem 0.9rem;
-  margin: 0.5rem 0;
-  border: 1px solid var(--color-accent);
-  border-radius: 0.5rem;
-  background: var(--color-accent-soft);
+}
+
+/* Consistent breathing room below the sticky header: between the header and the
+   list (no active filters) and between the active chips and the first card. */
+.gerbils-page .card-list {
+  margin-top: 0.625rem;
+}
+
+/* Infinite scroll: invisible sentinel observed to trigger the next page,
+   plus a centered "loading more" line while a page is being appended. */
+.rmf-sentinel {
+  height: 1px;
+  width: 100%;
+}
+.rmf-loadmore {
+  text-align: center;
+  padding: 0.75rem 0;
+}
+
+/* ---------- DESIGN (Rennmaus Filter): sticky header that blends out on scroll ----------
+   The whole header (title + search + filter pills + bar) sticks to the top; the list
+   scrolls underneath. The title row collapses once a 1px sentinel above the header
+   leaves the viewport. Negative margins let the bar span the app-main padding so its
+   background/border reach edge-to-edge while pinned. */
+.gerbils-scrolltop {
+  height: 1px;
+}
+.gerbils-topbar {
   position: sticky;
   top: 0;
-  z-index: 1;
+  z-index: 10;
+  background: var(--color-bg);
+  /* Horizontal negative margins let the bar's background + border-bottom span the
+     app-main padding edge-to-edge while pinned. The body scrolls, so the app-main
+     top padding scrolls away and the bar pins flush to the viewport top (no gap). */
+  margin: 0 -1rem;
+  padding: 0.5rem 1rem 0.625rem;
+  border-bottom: 1px solid var(--color-border);
+}
+@media (min-width: 768px) {
+  .gerbils-topbar {
+    margin: 0 -2rem;
+    padding: 0.75rem 2rem 0.625rem;
+  }
+}
+
+.gerbils-head h2 {
+  font-size: 26px;
+  font-weight: 800;
+  letter-spacing: -0.02em;
+  color: var(--color-text);
+}
+.gerbils-head .muted {
+  font-size: 14px;
+  margin: 2px 0 0;
+}
+.gerbils-head {
+  overflow: hidden;
+  /* Generous cap so the expanded state never clips when the "Neu" button wraps on
+     narrow phones; the collapse still animates cleanly from this height to 0. */
+  max-height: 200px;
+  transition: max-height 0.28s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.2s ease,
+    margin 0.28s cubic-bezier(0.22, 1, 0.36, 1);
+}
+.gerbils-head--condensed {
+  max-height: 0;
+  opacity: 0;
+  margin: 0;
+  pointer-events: none;
+}
+@media (prefers-reduced-motion: reduce) {
+  .gerbils-head {
+    transition: none;
+  }
+}
+
+/* ---------- DESIGN (Rennmaus Filter): new two-row list card ----------
+   Name + gender circle + status badge on top, "Farbschlag · Herkunft · geb. Datum"
+   below. Overrides the former single-row grid card from index.css. */
+.gerbil-card {
+  display: flex;
+  flex-direction: column;
+  /* Override the old single-row card's `align-items: center` (index.css) — in a
+     column flex that centers children horizontally and shoved the name off the left. */
+  align-items: stretch;
+  gap: 0.5rem;
+  padding: 0.875rem 1rem;
+  border: 1px solid var(--color-border);
+  border-radius: 18px;
+  background: var(--color-surface);
+  box-shadow: var(--shadow);
+  text-decoration: none;
+  color: var(--color-text);
+  transition: border-color 0.15s, box-shadow 0.15s,
+    transform 0.12s cubic-bezier(0.22, 1, 0.36, 1);
+}
+.gerbil-card:hover {
+  background: var(--color-surface);
+  border-color: color-mix(in srgb, var(--color-accent) 35%, var(--color-border));
+  box-shadow: 0 2px 6px rgba(61, 46, 35, 0.1), 0 8px 22px rgba(61, 46, 35, 0.08);
+}
+.gerbil-card:active {
+  transform: scale(0.992);
+}
+
+.gerbil-card__top {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 0.625rem;
+}
+.gerbil-card__name {
+  font-size: 18px;
+  font-weight: 700;
+  color: var(--color-text);
+  display: inline-flex;
+  align-items: center;
+}
+.gerbil-card__right {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  flex-shrink: 0;
+}
+.gerbil-card__meta {
+  font-size: 14px;
+  color: var(--color-text-muted);
+  font-weight: 500;
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 0.375rem;
+}
+.gerbil-card__meta-strong {
+  color: var(--color-text);
+  font-weight: 600;
+}
+.gerbil-card__dot {
+  color: var(--color-text-faint);
+}
+
+/* Status badge: design size (12px/700), coloured per status below. */
+.gerbil-card .badge {
+  font-size: 12px;
+  font-weight: 700;
+}
+
+/* Gender circle (♂/♀/?) — colored disc, from the design's GeschlechtIcon. */
+.gerbil-sex {
+  width: 24px;
+  height: 24px;
+  border-radius: 50%;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 14px;
+  font-weight: 700;
+  flex-shrink: 0;
+}
+.gerbil-sex--male {
+  color: #5a7da8;
+  background: color-mix(in srgb, #5a7da8 12%, #fff);
+}
+.gerbil-sex--female {
+  color: #c2703d;
+  background: color-mix(in srgb, #c2703d 12%, #fff);
+}
+.gerbil-sex--unknown {
+  color: #9a938a;
+  background: color-mix(in srgb, #9a938a 14%, #fff);
+}
+
+/* Status badge coloured per status — scoped to cards so other pages stay as-is. */
+.gerbil-card .badge--breeding {
+  color: #5e8c5a;
+  background: color-mix(in srgb, #5e8c5a 12%, #fff);
+  border: 1px solid color-mix(in srgb, #5e8c5a 30%, transparent);
+}
+.gerbil-card .badge--pet {
+  color: #5a7da8;
+  background: color-mix(in srgb, #5a7da8 12%, #fff);
+  border: 1px solid color-mix(in srgb, #5a7da8 30%, transparent);
+}
+.gerbil-card .badge--forsale {
+  color: #c2703d;
+  background: color-mix(in srgb, #c2703d 12%, #fff);
+  border: 1px solid color-mix(in srgb, #c2703d 30%, transparent);
+}
+.gerbil-card .badge--deceased {
+  color: #8a847b;
+  background: color-mix(in srgb, #8a847b 14%, #fff);
+  border: 1px solid color-mix(in srgb, #8a847b 30%, transparent);
+}
+.gerbil-card .badge--givenaway {
+  color: #b08e5c;
+  background: color-mix(in srgb, #b08e5c 14%, #fff);
+  border: 1px solid color-mix(in srgb, #b08e5c 32%, transparent);
 }
diff --git a/gerbil-manager-web/src/strings/de.ts b/gerbil-manager-web/src/strings/de.ts
index 589b3fc..aaf8c49 100644
--- a/gerbil-manager-web/src/strings/de.ts
+++ b/gerbil-manager-web/src/strings/de.ts
@@ -44,6 +44,8 @@ export const de = {
       empty: 'Keine Rennmäuse gefunden.',
       countLabel: 'Tiere',
       searchPlaceholder: 'Name suchen …',
+      // DESIGN (Rennmaus Filter): „geb." Präfix vor dem Geburtsdatum auf der Karte.
+      born: 'geb.',
       // BESTAND-FILTER: Kennzeichnung externer (nicht zum eigenen Bestand gehörender) Tiere
       externalBadge: 'Extern',
       externalTitle: 'Externes Tier — gehört nicht zum eigenen Bestand, nur für den Stammbaum erfasst.',
@@ -58,6 +60,8 @@ export const de = {
         sortBy: 'Sortieren nach',
         // BESTAND-FILTER: eigener Bestand (Clan) vs. externe Ahnen (nur Stammbaum)
         showExternal: 'Externe Ahnen einblenden',
+        // DESIGN (Rennmaus Filter): kurze Variante für den Toggle-Chip.
+        showExternalShort: 'Externe Ahnen',
         showExternalHint: 'Tiere aus fremden Zuchten, die nur für den Stammbaum erfasst sind.',
       },
       // Sortier-Optionen
@@ -872,12 +876,26 @@ export const de = {
     resetButton: 'Filter zurücksetzen',
     closeButton: 'Schließen',
   },
+  // ── DESIGN (Rennmaus Filter): Quick-Chips-Filter mit Bottom-Sheet ──
+  filterBar: {
+    title: 'Filter',
+    done: 'Fertig',
+    clearAll: 'Alle löschen',
+    remove: 'entfernen',
+    searchPlaceholder: 'Suchen …',
+    noMatch: 'Kein Treffer',
+    searchClear: 'Suche leeren',
+  },
   // ── FEAT-NAMEGEN: Namensvorschläge (KI-gestützt, UC-1 Einzeltier) ──
   namegen: {
     button: 'Name vorschlagen',
     panelTitle: 'Namensvorschläge',
     letterLabel: 'Anfangsbuchstabe',
     letterPlaceholder: 'z. B. A',
+    genderLabel: 'Geschlecht',
+    genderAny: 'Egal',
+    genderFemale: 'Weiblich',
+    genderMale: 'Männlich',
     usagesLabel: 'Herkunftskultur',
     loadButton: 'Vorschläge laden',
     loading: 'Lade Vorschläge …',