diff --git a/CLAUDE.md b/CLAUDE.md
index 570dacb..419dcce 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -206,8 +206,8 @@ at være for stort til én omgang og er selv delt i tre dele, alle
 stadig under "11b" (ingen ny bogstav-opdeling), **alle tre nu ✅**:
 **del 1** (delt frontend-infrastruktur + Deltagere-CRUD), **del 2**
 (runder + vinliste), **del 3** (mail-skabelon-editor +
-annoncér-knap). **11c** (ordreoversigt/markér betalt) er ikke bygget
-endnu.
+annoncér-knap). **11c** (ordreoversigt/markér betalt) er nu også ✅ —
+hele opgave 11 er dermed færdig.
 
 **Hosting-beslutning:** Admin-UI'et (`admin-ui/`, React + TypeScript,
 almindelig CSS — ingen framework) serveres af **samme FastAPI-app**
@@ -341,6 +341,33 @@ backend-ændringer nødvendige — opgave 7a's `MailTemplate`-CRUD og
   utilsigtet rigtig annoncering til de 308 rigtige deltagere under
   udvikling.
 
+**11c** (ordreoversigt/markér betalt) afslutter opgave 11. Ingen
+backend-ændringer nødvendige — alt data kommer fra opgave 9's
+allerede eksisterende `GET /orders?purchase_round_id=<id>`
+(`OrderAdminView`), al aggregering (flaske-/beløbstotal, udestående,
+den runde-brede vinliste) beregnes client-side.
+- **`pages/OrdersPage.tsx`** (`/runder/:roundId/ordrer`, linket fra
+  `RoundsPage` og `RoundDetailPage`) — en to-niveaus harmonika
+  (bestemt af brugeren): øverste fold viser rundens samlede
+  flasketal, total og **udestående** (defineret som summen af
+  ordrer der endnu ikke er markeret betalt — ikke bogstaveligt "total
+  minus ubetalte", som ville givet summen af de betalte ordrer i
+  stedet), foldet ud til den samlede, **kategori-grupperede**
+  vinliste for hele runden. Derunder én fold pr. ordre (sorteret
+  efter `order_number`, med en rød/grøn kant der viser
+  betalt/ubetalt-status uden at skulle folde ud), foldet ud til en
+  "Markér betalt"-knap (`POST /orders/{id}/mark-paid`, skjult og
+  erstattet af "Betalt [dato]" hvis allerede betalt) + ordrens egen
+  **kategori-grupperede** vinliste. Alle folder kan være åbne
+  samtidig.
+- **Beløb vises i DKK** (rundens `eur_dkk_rate`, samme
+  omregningsprincip som den offentlige bestillingsside og
+  kvitteringsmailen) — falder tilbage til EUR hvis runden ikke har en
+  kurs sat. Fundet under brugertest: beløb blev oprindeligt vist i
+  EUR, og både den samlede og de individuelle vinlister manglede
+  kategori-gruppering samt havde antal efter vinnavn i stedet for
+  før — alle tre rettet.
+
 ## Mail-events
 1. Runde åbnes → mail til alle aktive deltagere på ruten. **Implementeret**
    (opgave 7a-c): skabelon pr. rute (`MailTemplate`,
@@ -373,7 +400,7 @@ logges/advares om i stedet.
 
 ## Fase 1 — nuværende scope
 
-**Færdige opgaver (1-10, 11a, 11b):**
+**Færdige opgaver (1-11):**
 1. ✅ FastAPI + SQLModel + PostgreSQL + Alembic scaffolding
 2. ✅ Datamodellerne (Organization/Route-hierarki)
 3. ✅ Deltager-migrering fra MongoDB (308 deltagere importeret,
@@ -428,7 +455,8 @@ logges/advares om i stedet.
       (se "Admin-UI-arkitektur" ovenfor), alle færdige: **del 1**
       (frontend-infrastruktur + Deltagere-CRUD), **del 2** (runder +
       vinliste), **del 3** (mail-skabelon-editor + annoncér-knap).
-    - **11c**: Ordreoversigt/markér betalt — ikke bygget.
+    - **11c**: ✅ Ordreoversigt/markér betalt — se
+      "Admin-UI-arkitektur" ovenfor. Hele opgave 11 er dermed færdig.
 
 **Resterende opgaver:**
 12. Testkør en rigtig runde gennem hele flowet
diff --git a/admin-ui/src/App.css b/admin-ui/src/App.css
index a0cf3aa..a747b38 100644
--- a/admin-ui/src/App.css
+++ b/admin-ui/src/App.css
@@ -164,3 +164,41 @@ td {
   padding: 8px 16px;
   cursor: pointer;
 }
+
+.accordion {
+  margin-top: 16px;
+}
+
+.accordion-item {
+  border: 1px solid #ddd;
+  border-radius: 4px;
+  margin-bottom: 8px;
+}
+
+.accordion-header {
+  display: block;
+  width: 100%;
+  text-align: left;
+  padding: 12px;
+  background: #f7f7f7;
+  border: none;
+  cursor: pointer;
+  font-size: 1rem;
+}
+
+.accordion-header:hover {
+  background: #efefef;
+}
+
+.accordion-header.unpaid {
+  border-left: 4px solid #b3261e;
+}
+
+.accordion-header.paid {
+  border-left: 4px solid #2e7d32;
+}
+
+.accordion-body {
+  padding: 12px;
+  border-top: 1px solid #ddd;
+}
diff --git a/admin-ui/src/App.tsx b/admin-ui/src/App.tsx
index 5b548cc..af69de2 100644
--- a/admin-ui/src/App.tsx
+++ b/admin-ui/src/App.tsx
@@ -2,6 +2,7 @@ import { Navigate, Route, BrowserRouter, Routes } from 'react-router-dom'
 import { AuthProvider, useAuth } from './AuthContext'
 import { Layout } from './Layout'
 import { LoginPage } from './pages/LoginPage'
+import { OrdersPage } from './pages/OrdersPage'
 import { ParticipantsPage } from './pages/ParticipantsPage'
 import { RoundDetailPage } from './pages/RoundDetailPage'
 import { RoundsPage } from './pages/RoundsPage'
@@ -20,6 +21,7 @@ function AppRoutes() {
         <Route path="/deltagere" element={<ParticipantsPage />} />
         <Route path="/runder" element={<RoundsPage />} />
         <Route path="/runder/:roundId" element={<RoundDetailPage />} />
+        <Route path="/runder/:roundId/ordrer" element={<OrdersPage />} />
         <Route path="/skabeloner" element={<TemplatesPage />} />
         <Route path="*" element={<Navigate to="/deltagere" replace />} />
       </Route>
diff --git a/admin-ui/src/pages/OrdersPage.tsx b/admin-ui/src/pages/OrdersPage.tsx
new file mode 100644
index 0000000..f1eae8d
--- /dev/null
+++ b/admin-ui/src/pages/OrdersPage.tsx
@@ -0,0 +1,260 @@
+import { useEffect, useState } from 'react'
+import { useParams } from 'react-router-dom'
+import { apiFetch, ApiError } from '../api'
+
+interface PurchaseRound {
+  id: number
+  name: string
+  eur_dkk_rate: string | null
+}
+
+interface WineCategory {
+  id: number
+  name: string
+  sort_order: number
+}
+
+interface WineOffering {
+  id: number
+  category_id: number
+}
+
+interface OrderLineAdminView {
+  id: number
+  order_id: number
+  wine_offering_id: number
+  quantity: number
+  wine_name: string
+  unit_price: string
+}
+
+interface OrderAdminView {
+  id: number
+  participant_id: number
+  purchase_round_id: number
+  order_number: number
+  payment_status: 'unpaid' | 'paid'
+  paid_at: string | null
+  created_at: string
+  participant_name: string
+  participant_email: string
+  participant_phone: string | null
+  order_lines: OrderLineAdminView[]
+  total_price_eur: string
+}
+
+export function OrdersPage() {
+  const { roundId } = useParams<{ roundId: string }>()
+  const [round, setRound] = useState<PurchaseRound | null>(null)
+  const [orders, setOrders] = useState<OrderAdminView[]>([])
+  const [wineOfferings, setWineOfferings] = useState<WineOffering[]>([])
+  const [categories, setCategories] = useState<WineCategory[]>([])
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+  const [summaryOpen, setSummaryOpen] = useState(false)
+  const [openOrderIds, setOpenOrderIds] = useState<Set<number>>(new Set())
+
+  async function loadOrders(forRoundId: string) {
+    const data = await apiFetch<OrderAdminView[]>(`/orders?purchase_round_id=${forRoundId}&limit=500`)
+    setOrders(data.slice().sort((a, b) => a.order_number - b.order_number))
+  }
+
+  async function loadAll() {
+    if (!roundId) return
+    setLoading(true)
+    setError(null)
+    try {
+      const [roundData, wineOfferingData, categoryData] = await Promise.all([
+        apiFetch<PurchaseRound>(`/purchase-rounds/${roundId}`),
+        apiFetch<WineOffering[]>(`/wine-offerings?purchase_round_id=${roundId}&limit=500`),
+        apiFetch<WineCategory[]>('/wine-categories'),
+        loadOrders(roundId),
+      ])
+      setRound(roundData)
+      setWineOfferings(wineOfferingData)
+      setCategories(categoryData)
+    } catch (err) {
+      setError(err instanceof ApiError ? err.message : 'Kunne ikke hente ordrer')
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  useEffect(() => {
+    loadAll()
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [roundId])
+
+  function toggleOrder(id: number) {
+    setOpenOrderIds((prev) => {
+      const next = new Set(prev)
+      if (next.has(id)) next.delete(id)
+      else next.add(id)
+      return next
+    })
+  }
+
+  async function handleMarkPaid(order: OrderAdminView) {
+    if (!roundId) return
+    setError(null)
+    try {
+      await apiFetch(`/orders/${order.id}/mark-paid`, { method: 'POST' })
+      await loadOrders(roundId)
+    } catch (err) {
+      setError(err instanceof ApiError ? err.message : 'Kunne ikke markere ordren som betalt')
+    }
+  }
+
+  if (loading) return <p>Indlæser...</p>
+  if (!round) return <p className="error">{error ?? 'Runden blev ikke fundet'}</p>
+
+  const rate = round.eur_dkk_rate ? Number(round.eur_dkk_rate) : null
+
+  function formatEur(amountEur: number): string {
+    if (rate) return `${(amountEur * rate).toFixed(2)} kr`
+    return `${amountEur.toFixed(2)} EUR`
+  }
+
+  const totalBottles = orders.reduce(
+    (sum, o) => sum + o.order_lines.reduce((lineSum, l) => lineSum + l.quantity, 0),
+    0,
+  )
+  const totalAmount = orders.reduce((sum, o) => sum + Number(o.total_price_eur), 0)
+  const outstanding = orders
+    .filter((o) => o.payment_status === 'unpaid')
+    .reduce((sum, o) => sum + Number(o.total_price_eur), 0)
+
+  const categoryByWineOfferingId = new Map<number, WineCategory>()
+  for (const offering of wineOfferings) {
+    const category = categories.find((c) => c.id === offering.category_id)
+    if (category) categoryByWineOfferingId.set(offering.id, category)
+  }
+
+  const wineAggregation = new Map<number, { name: string; quantity: number; category: WineCategory | undefined }>()
+  for (const order of orders) {
+    for (const line of order.order_lines) {
+      const existing = wineAggregation.get(line.wine_offering_id)
+      if (existing) existing.quantity += line.quantity
+      else
+        wineAggregation.set(line.wine_offering_id, {
+          name: line.wine_name,
+          quantity: line.quantity,
+          category: categoryByWineOfferingId.get(line.wine_offering_id),
+        })
+    }
+  }
+  const wineRows = Array.from(wineAggregation.values()).sort((a, b) => {
+    const orderA = a.category?.sort_order ?? 0
+    const orderB = b.category?.sort_order ?? 0
+    if (orderA !== orderB) return orderA - orderB
+    return a.name.localeCompare(b.name)
+  })
+
+  const wineRowsByCategory = new Map<string, typeof wineRows>()
+  for (const row of wineRows) {
+    const categoryName = row.category?.name ?? 'Ukategoriseret'
+    const list = wineRowsByCategory.get(categoryName) ?? []
+    list.push(row)
+    wineRowsByCategory.set(categoryName, list)
+  }
+
+  function groupOrderLinesByCategory(lines: OrderLineAdminView[]): [string, OrderLineAdminView[]][] {
+    const sorted = lines.slice().sort((a, b) => {
+      const orderA = categoryByWineOfferingId.get(a.wine_offering_id)?.sort_order ?? 0
+      const orderB = categoryByWineOfferingId.get(b.wine_offering_id)?.sort_order ?? 0
+      if (orderA !== orderB) return orderA - orderB
+      return a.wine_name.localeCompare(b.wine_name)
+    })
+    const groups = new Map<string, OrderLineAdminView[]>()
+    for (const line of sorted) {
+      const categoryName = categoryByWineOfferingId.get(line.wine_offering_id)?.name ?? 'Ukategoriseret'
+      const list = groups.get(categoryName) ?? []
+      list.push(line)
+      groups.set(categoryName, list)
+    }
+    return Array.from(groups.entries())
+  }
+
+  return (
+    <div>
+      <h1>Ordreoversigt</h1>
+      {error && <p className="error">{error}</p>}
+
+      {orders.length === 0 ? (
+        <p>Ingen bestillinger endnu for denne runde.</p>
+      ) : (
+        <div className="accordion">
+          <div className="accordion-item">
+            <button className="accordion-header" onClick={() => setSummaryOpen((v) => !v)}>
+              {round.name} — {totalBottles} flasker — Total: {formatEur(totalAmount)} — Udestående:{' '}
+              {formatEur(outstanding)}
+            </button>
+            {summaryOpen && (
+              <div className="accordion-body">
+                {Array.from(wineRowsByCategory.entries()).map(([categoryName, rows]) => (
+                  <table key={categoryName}>
+                    <thead>
+                      <tr>
+                        <th colSpan={2}>{categoryName}</th>
+                      </tr>
+                    </thead>
+                    <tbody>
+                      {rows.map((row) => (
+                        <tr key={row.name}>
+                          <td>{row.quantity}</td>
+                          <td>{row.name}</td>
+                        </tr>
+                      ))}
+                    </tbody>
+                  </table>
+                ))}
+              </div>
+            )}
+          </div>
+
+          {orders.map((order) => (
+            <div className="accordion-item" key={order.id}>
+              <button
+                className={`accordion-header ${order.payment_status === 'paid' ? 'paid' : 'unpaid'}`}
+                onClick={() => toggleOrder(order.id)}
+              >
+                #{order.order_number} — {order.participant_name} — {order.participant_phone ?? ''} —{' '}
+                {order.participant_email} — {formatEur(Number(order.total_price_eur))} —{' '}
+                {order.payment_status === 'paid' ? 'Betalt' : 'Ubetalt'}
+              </button>
+              {openOrderIds.has(order.id) && (
+                <div className="accordion-body">
+                  {order.payment_status === 'paid' ? (
+                    <p className="hint">
+                      Betalt {order.paid_at ? new Date(order.paid_at).toLocaleString('da-DK') : ''}
+                    </p>
+                  ) : (
+                    <button onClick={() => handleMarkPaid(order)}>Markér betalt</button>
+                  )}
+                  {groupOrderLinesByCategory(order.order_lines).map(([categoryName, lines]) => (
+                    <table key={categoryName}>
+                      <thead>
+                        <tr>
+                          <th colSpan={3}>{categoryName}</th>
+                        </tr>
+                      </thead>
+                      <tbody>
+                        {lines.map((line) => (
+                          <tr key={line.id}>
+                            <td>{line.quantity}</td>
+                            <td>{line.wine_name}</td>
+                            <td>{formatEur(Number(line.unit_price))}</td>
+                          </tr>
+                        ))}
+                      </tbody>
+                    </table>
+                  ))}
+                </div>
+              )}
+            </div>
+          ))}
+        </div>
+      )}
+    </div>
+  )
+}
diff --git a/admin-ui/src/pages/RoundDetailPage.tsx b/admin-ui/src/pages/RoundDetailPage.tsx
index 2e6b0d9..5695b1d 100644
--- a/admin-ui/src/pages/RoundDetailPage.tsx
+++ b/admin-ui/src/pages/RoundDetailPage.tsx
@@ -318,6 +318,9 @@ export function RoundDetailPage() {
           />
         </label>
         <button type="submit">Gem</button>
+        <button type="button" onClick={() => navigate(`/runder/${roundId}/ordrer`)}>
+          Se ordrer
+        </button>
         <button type="button" onClick={handleCopy}>
           Kopiér denne runde
         </button>
diff --git a/admin-ui/src/pages/RoundsPage.tsx b/admin-ui/src/pages/RoundsPage.tsx
index a5c566f..fa840d0 100644
--- a/admin-ui/src/pages/RoundsPage.tsx
+++ b/admin-ui/src/pages/RoundsPage.tsx
@@ -143,6 +143,7 @@ export function RoundsPage() {
               <td>{formatDateTime(round.pickup_at)}</td>
               <td>
                 <button onClick={() => navigate(`/runder/${round.id}`)}>Redigér</button>
+                <button onClick={() => navigate(`/runder/${round.id}/ordrer`)}>Se ordrer</button>
                 <button onClick={() => handleCopy(round)}>Kopiér</button>
                 {(round.status === 'draft' ||
                   (round.status === 'closed' && currentUser?.is_superadmin && isElevated)) && (