diff --git a/CLAUDE.md b/CLAUDE.md
index 2678efc..aca69b8 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -64,6 +64,7 @@ Known risk: `docker-compose.yml` sets `restart: unless-stopped` on `app`, so a c
 - **Secrets**: master xprv encrypted at rest with a symmetric scheme (AES-GCM/Fernet); the encryption key itself lives in an env var, never in the DB or in git.
 - **Operational config**: every business/round parameter (fee address, bet amount, round duration, round cooldown, draw animation duration, minimum amount, network fee rate, RBF timeout) lives in the `round_config` DB table (single row, `app/rounds/config.py`) and is only editable live via the admin dashboard (`/admin`) or its API — no env var involved at all, no redeploy or restart needed. Defaults for a brand-new instance are hardcoded column defaults on the `RoundConfig` model (`app/db/models.py`), not `app/config.py`. Secrets and infra wiring (master key, JWT secret, Electrum host, admin token, database URL) stay env-var-driven in `.env` since those genuinely need a restart.
 - **Round cooldown**: `round_cooldown_seconds` — gap after a round closes before the next one opens, so players have time to see the outcome (default 30s). Not in the original flowchart; added afterwards as an explicit design decision.
+- **Maintenance pause**: `RoundConfig.paused` (default `false`), toggled via `POST /admin/pause` / `POST /admin/resume` (a dedicated "Manutenzione" card in `/admin`'s Parametri section, not a plain config field — it's a deliberate operator action, audit-logged as `lottery_paused`/`lottery_resumed`). When set, `rounds/service.py:open_new_round_if_needed` stops opening a *next* round once the current one closes — it never interrupts a round already in progress (that one still closes, draws, and pays out its winner normally). `GET /rounds/current` exposes it as `lottery_paused` so the user-facing page (`/`) shows a maintenance banner.
 
 ## PLM network parameters
 
diff --git a/app/api/routes/admin.py b/app/api/routes/admin.py
index 9e7af95..d301ed1 100644
--- a/app/api/routes/admin.py
+++ b/app/api/routes/admin.py
@@ -29,6 +29,7 @@ _CONFIG_FIELDS = (
     "fee_rate_sat_vb",
     "rbf_timeout_seconds",
     "draw_animation_seconds",
+    "paused",
 )
 
 
@@ -41,6 +42,7 @@ class RoundConfigResponse(BaseModel):
     fee_rate_sat_vb: int
     rbf_timeout_seconds: int
     draw_animation_seconds: int
+    paused: bool
 
 
 class RoundConfigUpdate(BaseModel):
@@ -52,6 +54,7 @@ class RoundConfigUpdate(BaseModel):
     fee_rate_sat_vb: int | None = None
     rbf_timeout_seconds: int | None = None
     draw_animation_seconds: int | None = None
+    paused: bool | None = None
 
 
 def _config_response(config) -> RoundConfigResponse:
@@ -78,6 +81,27 @@ async def update_config(
     return _config_response(config)
 
 
+@router.post("/pause", response_model=RoundConfigResponse, dependencies=[Depends(require_admin)])
+async def pause_lottery(session: AsyncSession = Depends(get_session)) -> RoundConfigResponse:
+    """Maintenance switch: the round in progress (if any) still closes, draws,
+    and pays out its winner normally — only opening the *next* round is
+    suppressed until /admin/resume is called (rounds/service.py)."""
+    config = await get_round_config(session)
+    config.paused = True
+    await write_audit_log(session, "lottery_paused", {})
+    await session.commit()
+    return _config_response(config)
+
+
+@router.post("/resume", response_model=RoundConfigResponse, dependencies=[Depends(require_admin)])
+async def resume_lottery(session: AsyncSession = Depends(get_session)) -> RoundConfigResponse:
+    config = await get_round_config(session)
+    config.paused = False
+    await write_audit_log(session, "lottery_resumed", {})
+    await session.commit()
+    return _config_response(config)
+
+
 class AdminUserResponse(BaseModel):
     id: int
     username: str
diff --git a/app/api/routes/rounds.py b/app/api/routes/rounds.py
index 2b55a54..b85a9d0 100644
--- a/app/api/routes/rounds.py
+++ b/app/api/routes/rounds.py
@@ -25,6 +25,7 @@ class CurrentRoundResponse(BaseModel):
     winner_user_id: int | None = None
     winner_amount_sats: int | None = None
     chain_tip_height: int | None = None
+    lottery_paused: bool = False
 
 
 @router.get("/current", response_model=CurrentRoundResponse)
@@ -39,6 +40,7 @@ async def current_round(request: Request, session: AsyncSession = Depends(get_se
             bet_amount_sats=config.bet_amount_sats,
             draw_animation_seconds=config.draw_animation_seconds,
             chain_tip_height=chain_tip_height,
+            lottery_paused=config.paused,
         )
 
     participant_count = await session.scalar(
@@ -60,4 +62,5 @@ async def current_round(request: Request, session: AsyncSession = Depends(get_se
         winner_user_id=round_.winner_user_id,
         winner_amount_sats=round_.winner_amount_sats,
         chain_tip_height=chain_tip_height,
+        lottery_paused=config.paused,
     )
diff --git a/app/db/models.py b/app/db/models.py
index 9bf6dec..60927dc 100644
--- a/app/db/models.py
+++ b/app/db/models.py
@@ -95,6 +95,10 @@ class RoundConfig(Base):
     min_amount_sats: Mapped[int] = mapped_column(BigInteger, default=100_000_000)
     fee_rate_sat_vb: Mapped[int] = mapped_column(default=1)
     rbf_timeout_seconds: Mapped[int] = mapped_column(default=900)
+    # Maintenance switch: when true, the round currently in progress still runs to
+    # completion (closes, draws, pays out the winner) but no new round is opened
+    # afterwards — see rounds/service.py:open_new_round_if_needed.
+    paused: Mapped[bool] = mapped_column(default=False)
     updated_at: Mapped[datetime] = mapped_column(default=utcnow, onupdate=utcnow)
 
 
diff --git a/app/rounds/service.py b/app/rounds/service.py
index dcdb217..44b3eab 100644
--- a/app/rounds/service.py
+++ b/app/rounds/service.py
@@ -19,19 +19,26 @@ async def get_active_round(session: AsyncSession) -> Round | None:
 async def open_new_round_if_needed(session: AsyncSession) -> Round | None:
     """Returns the active round if one exists (whatever its status). Otherwise
     opens a fresh one, unless the last closed round's cooldown (ROUND_COOLDOWN_SECONDS)
-    hasn't elapsed yet — in which case returns None. Callers that need to attach a
-    bet must additionally check the returned round's status == "open" — a round in
-    closing/drawing/paying_out isn't accepting new bets, but a new round can't open
-    until it's done."""
+    hasn't elapsed yet, or the lottery is paused for maintenance — in either case
+    returns None. Callers that need to attach a bet must additionally check the
+    returned round's status == "open" — a round in closing/drawing/paying_out
+    isn't accepting new bets, but a new round can't open until it's done.
+
+    Pausing never touches a round already in progress: it only suppresses opening
+    the *next* one, so the current round still closes, draws, and pays out the
+    winner normally (see admin.py's /admin/pause and /admin/resume)."""
     active = await get_active_round(session)
     if active is not None:
         return active
 
+    config = await get_round_config(session)
+    if config.paused:
+        return None
+
     last_closed = await session.scalar(select(Round).where(Round.status == "closed").order_by(Round.id.desc()))
     if last_closed is not None and last_closed.closed_at is not None:
         closed_at = last_closed.closed_at.replace(tzinfo=timezone.utc)
-        cooldown_seconds = (await get_round_config(session)).round_cooldown_seconds
-        if datetime.now(timezone.utc) < closed_at + timedelta(seconds=cooldown_seconds):
+        if datetime.now(timezone.utc) < closed_at + timedelta(seconds=config.round_cooldown_seconds):
             return None
 
     round_ = Round(status="open")
diff --git a/app/static/admin.html b/app/static/admin.html
index c101cb5..458032c 100644
--- a/app/static/admin.html
+++ b/app/static/admin.html
@@ -77,6 +77,12 @@
   }
   .chain-block { color: var(--color-muted-foreground); font-size: 0.82rem; white-space: nowrap; }
 
+  .row-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
+  #maintenance-btn.btn-stop {
+    background: var(--color-destructive-bg); color: var(--color-destructive); border-color: var(--color-destructive);
+  }
+  .status-dot.status-paused { background: var(--color-destructive); }
+
   main { max-width: 960px; margin: 0 auto; padding: 24px 20px 80px; }
 
   .view { display: none; }
@@ -221,6 +227,21 @@
       <h2 class="section-title">Parametri</h2>
       <p class="hint">Configurazione operativa, salvata nel database — modificabile in qualsiasi momento senza riavviare il server.</p>
 
+      <div class="card" id="maintenance-card">
+        <h2>Manutenzione</h2>
+        <p class="hint" id="maintenance-hint">
+          Interrompe l'apertura di nuovi round dopo quello in corso, senza troncare il round attuale — chiusura,
+          estrazione e pagamento del vincitore avvengono normalmente. Gli utenti vedono un avviso di manutenzione.
+        </p>
+        <div class="row-between">
+          <span class="chain-status-pill">
+            <span class="status-dot" id="maintenance-dot"></span>
+            <span id="maintenance-status-label">—</span>
+          </span>
+          <button id="maintenance-btn" class="secondary" style="width:auto;margin-top:0" onclick="toggleMaintenance()">…</button>
+        </div>
+      </div>
+
       <div class="card">
         <div class="grid-2">
           <div>
@@ -460,11 +481,53 @@ async function adminLoadConfig() {
     document.getElementById('admin-min-amount').value = data.min_amount_sats / SATS_PER_PLM;
     document.getElementById('admin-fee-rate').value = data.fee_rate_sat_vb;
     document.getElementById('admin-rbf-timeout').value = data.rbf_timeout_seconds;
+    renderMaintenanceState(data.paused);
   } catch (e) {
     toast('Errore nel caricamento configurazione: ' + e.message, 'error');
   }
 }
 
+function renderMaintenanceState(paused) {
+  const dot = document.getElementById('maintenance-dot');
+  const label = document.getElementById('maintenance-status-label');
+  const btn = document.getElementById('maintenance-btn');
+  btn.dataset.paused = paused ? '1' : '0';
+  if (paused) {
+    dot.className = 'status-dot status-paused';
+    label.textContent = 'In pausa: nessun nuovo round verrà aperto';
+    btn.textContent = 'Riprendi lotteria';
+    btn.classList.remove('btn-stop');
+  } else {
+    dot.className = 'status-dot status-open';
+    label.textContent = 'Attiva: i round si susseguono normalmente';
+    btn.textContent = 'Interrompi dopo questo round';
+    btn.classList.add('btn-stop');
+  }
+}
+
+async function toggleMaintenance() {
+  const btn = document.getElementById('maintenance-btn');
+  const isPaused = btn.dataset.paused === '1';
+  const path = isPaused ? '/admin/resume' : '/admin/pause';
+  if (!isPaused && !window.confirm(
+    "Nessun nuovo round verrà aperto dopo quello in corso, fino a quando non riprendi la lotteria. " +
+    "Il round attuale (se presente) verrà comunque completato e il vincitore pagato. Continuare?"
+  )) {
+    return;
+  }
+  btn.disabled = true;
+  try {
+    const data = await callAdmin('POST', path, {});
+    renderMaintenanceState(data.paused);
+    toast(data.paused ? 'Lotteria in pausa.' : 'Lotteria ripresa.', 'success');
+    refreshChainStatus();
+  } catch (e) {
+    toast('Errore: ' + e.message, 'error');
+  } finally {
+    btn.disabled = false;
+  }
+}
+
 async function adminSave() {
   const btn = document.getElementById('save-btn');
   const feeAddress = document.getElementById('admin-fee-address').value;
diff --git a/app/static/index.html b/app/static/index.html
index f1dd84c..12d71d9 100644
--- a/app/static/index.html
+++ b/app/static/index.html
@@ -30,17 +30,12 @@
     font-family: 'Fira Sans', system-ui, sans-serif;
     background: var(--color-background);
     color: var(--color-foreground);
-    max-width: 480px;
-    margin: 0 auto;
-    padding: 32px 20px 80px;
     line-height: 1.5;
   }
 
-  .mono { font-family: 'Fira Code', monospace; }
+  .app-shell { max-width: 480px; margin: 0 auto; padding: 24px 20px 80px; }
 
-  header { margin-bottom: 24px; }
-  header h1 { font-size: 1.375rem; font-weight: 700; margin: 0; letter-spacing: -0.01em; }
-  header p { color: var(--color-muted-foreground); font-size: 0.9rem; margin: 4px 0 0; }
+  .mono { font-family: 'Fira Code', monospace; }
 
   .card {
     background: var(--color-surface);
@@ -102,11 +97,37 @@
   }
   button.link:hover { filter: none; color: var(--color-foreground); }
 
-  .account-bar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 4px; }
-  .account-bar .name { font-weight: 600; }
-
   .row-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
 
+  /* --- sticky app navbar: identity row + section tabs, shown only when logged in --- */
+  .app-navbar {
+    position: sticky; top: 0; z-index: 20;
+    background: color-mix(in srgb, var(--color-surface) 92%, transparent);
+    backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
+    border-bottom: 1px solid var(--color-border); margin-bottom: 20px;
+  }
+  .app-navbar-top {
+    max-width: 480px; margin: 0 auto; padding: 12px 20px 8px;
+    display: flex; align-items: center; justify-content: space-between; gap: 12px;
+  }
+  .app-navbar-top .brand { font-weight: 700; font-size: 1rem; letter-spacing: -0.01em; }
+  .app-navbar-account { display: flex; align-items: center; gap: 10px; }
+  .app-navbar-account .name { font-weight: 600; font-size: 0.85rem; }
+
+  .app-navbar-tabs { max-width: 480px; margin: 0 auto; padding: 0 12px; display: flex; }
+  .app-navbar-tabs button.navbar-tab {
+    flex: 1; width: auto; min-height: auto; margin-top: 0; padding: 8px 4px 10px;
+    display: flex; flex-direction: column; align-items: center; gap: 3px;
+    font-size: 0.72rem; font-weight: 600; font-family: inherit; cursor: pointer;
+    background: none; color: var(--color-muted-foreground);
+    border: none; border-bottom: 2px solid transparent; margin-bottom: -1px;
+    transition: color 150ms, border-color 150ms;
+  }
+  .app-navbar-tabs button.navbar-tab .icon { width: 18px; height: 18px; }
+  .app-navbar-tabs button.navbar-tab.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }
+  .app-navbar-tabs button.navbar-tab:hover { filter: none; color: var(--color-foreground); }
+  .app-navbar-tabs button.navbar-tab.active:hover { color: var(--color-primary); }
+
   .address-box {
     display: flex; align-items: center; justify-content: space-between; gap: 8px;
     background: var(--color-background); border: 1px solid var(--color-border);
@@ -118,20 +139,6 @@
 
   .icon { width: 16px; height: 16px; flex-shrink: 0; }
 
-  nav.menu { display: flex; gap: 4px; margin-bottom: 16px; }
-  nav.menu button.nav-item {
-    flex: 1; width: auto; margin-top: 0; min-height: 56px; padding: 8px 4px;
-    flex-direction: column; gap: 4px; font-size: 0.8rem; font-weight: 600;
-    background: var(--color-surface); color: var(--color-muted-foreground);
-    border: 1px solid var(--color-border); border-radius: 10px;
-  }
-  nav.menu button.nav-item .icon { width: 20px; height: 20px; }
-  nav.menu button.nav-item.active {
-    background: var(--color-primary); color: var(--color-on-primary); border-color: var(--color-primary);
-  }
-  nav.menu button.nav-item:hover { filter: none; border-color: var(--color-ring); }
-  nav.menu button.nav-item.active:hover { filter: brightness(0.94); }
-
   .dash-panel { display: none; }
   .dash-panel.active { display: block; }
 
@@ -220,25 +227,6 @@
   }
   .trust-pill .icon { width: 13px; height: 13px; color: var(--color-success); flex-shrink: 0; }
 
-  /* --- bento nav for the dashboard menu --- */
-  nav.menu.bento {
-    display: grid; grid-template-columns: 1fr 1fr; grid-template-areas: "deposit deposit" "bet withdraw";
-    gap: 8px;
-  }
-  nav.menu.bento button.nav-item {
-    width: 100%; align-items: flex-start; text-align: left; flex-direction: row; gap: 10px;
-    min-height: 64px; padding: 12px 14px; border-radius: 14px;
-  }
-  nav.menu.bento button#nav-deposit { grid-area: deposit; }
-  nav.menu.bento button#nav-bet { grid-area: bet; }
-  nav.menu.bento button#nav-withdraw { grid-area: withdraw; }
-  nav.menu.bento button.nav-item .icon { width: 20px; height: 20px; margin-top: 2px; }
-  nav.menu.bento button.nav-item .nav-item-text { display: flex; flex-direction: column; gap: 2px; }
-  nav.menu.bento button.nav-item .nav-item-title { font-size: 0.85rem; }
-  nav.menu.bento button.nav-item .nav-item-hint {
-    font-size: 0.7rem; font-weight: 400; color: inherit; opacity: 0.75;
-  }
-
   /* --- glowing card while a round is drawing --- */
   .card.drawing-glow {
     border-color: color-mix(in srgb, var(--color-primary) 55%, var(--color-border));
@@ -284,6 +272,14 @@
   }
   .chain-block { color: var(--color-muted-foreground); white-space: nowrap; }
 
+  .maintenance-banner {
+    display: flex; align-items: flex-start; gap: 8px;
+    background: color-mix(in srgb, var(--color-primary) 12%, var(--color-surface));
+    border: 1px solid color-mix(in srgb, var(--color-primary) 40%, transparent);
+    color: var(--color-foreground); border-radius: var(--radius);
+    padding: 12px 14px; font-size: 0.82rem; line-height: 1.4; margin-bottom: 16px;
+  }
+
   @media (prefers-reduced-motion: reduce) {
     * { animation: none !important; transition: none !important; }
   }
@@ -291,6 +287,32 @@
 </head>
 <body>
 
+<nav class="app-navbar hidden" id="app-navbar" aria-label="Sezioni">
+  <div class="app-navbar-top">
+    <span class="brand">PLM Lottery</span>
+    <div class="app-navbar-account">
+      <span class="name" id="dash-username"></span>
+      <button class="link" onclick="logout()">Esci</button>
+    </div>
+  </div>
+  <div class="app-navbar-tabs">
+    <button class="navbar-tab active" id="nav-deposit" onclick="switchPanel('deposit')">
+      <svg class="icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="7" width="20" height="14" rx="2"/><path d="M16 21V5a2 2 0 0 0-2-2H6a2 2 0 0 0-2 2v16"/></svg>
+      Deposito
+    </button>
+    <button class="navbar-tab" id="nav-bet" onclick="switchPanel('bet')">
+      <svg class="icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="6" width="20" height="12" rx="2"/><path d="M6 12h.01M12 12h.01M18 12h.01"/></svg>
+      Bet
+    </button>
+    <button class="navbar-tab" id="nav-withdraw" onclick="switchPanel('withdraw')">
+      <svg class="icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 19V5M5 12l7-7 7 7"/></svg>
+      Prelievo
+    </button>
+  </div>
+</nav>
+
+<div class="app-shell">
+
 <div class="chain-bar" id="chain-bar">
   <span class="chain-status-pill">
     <span class="status-dot" id="chain-status-dot"></span>
@@ -299,6 +321,11 @@
   <span class="chain-block mono" id="chain-block">Blocco —</span>
 </div>
 
+<div class="maintenance-banner hidden" id="maintenance-banner">
+  <span>⚠️</span>
+  <span>Manutenzione in programma: il round in corso viene completato regolarmente (vincitore incluso), ma il round successivo non si aprirà finché la manutenzione non sarà terminata.</span>
+</div>
+
 <section id="landing-hero" class="hero">
   <h1>PLM Lottery</h1>
   <p class="lead">Deposita PLM, entra nel round con una quota fissa, e se viene estratto il tuo numero vinci il montepremi.</p>
@@ -355,13 +382,6 @@
 
 <section id="dashboard-section" class="hidden">
 
-  <div class="card">
-    <div class="account-bar">
-      <span class="name" id="dash-username"></span>
-      <button class="link" onclick="logout()">Esci</button>
-    </div>
-  </div>
-
   <div class="card" id="round-card">
     <div class="row-between" id="round-normal-row">
       <h2 id="round-title">Round —</h2>
@@ -386,21 +406,6 @@
     <div class="hidden" id="draw-result"></div>
   </div>
 
-  <nav class="menu bento" aria-label="Sezioni">
-    <button class="nav-item active" id="nav-deposit" onclick="switchPanel('deposit')">
-      <svg class="icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="7" width="20" height="14" rx="2"/><path d="M16 21V5a2 2 0 0 0-2-2H6a2 2 0 0 0-2 2v16"/></svg>
-      <span class="nav-item-text"><span class="nav-item-title">Deposito</span><span class="nav-item-hint">Indirizzo e saldo</span></span>
-    </button>
-    <button class="nav-item" id="nav-bet" onclick="switchPanel('bet')">
-      <svg class="icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="6" width="20" height="12" rx="2"/><path d="M6 12h.01M12 12h.01M18 12h.01"/></svg>
-      <span class="nav-item-text"><span class="nav-item-title">Bet</span><span class="nav-item-hint">Entra nel round</span></span>
-    </button>
-    <button class="nav-item" id="nav-withdraw" onclick="switchPanel('withdraw')">
-      <svg class="icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 19V5M5 12l7-7 7 7"/></svg>
-      <span class="nav-item-text"><span class="nav-item-title">Prelievo</span><span class="nav-item-hint">Verso indirizzo esterno</span></span>
-    </button>
-  </nav>
-
   <div class="dash-panel active" id="panel-deposit">
     <div class="card">
       <h2>Saldo interno</h2>
@@ -451,6 +456,8 @@
 
 </section>
 
+</div>
+
 <div id="toast-container" aria-live="polite"></div>
 
 <script>
@@ -536,6 +543,8 @@ function updateChainStatusBar(data) {
   dot.className = 'status-dot status-' + statusKey;
   label.textContent = CHAIN_STATUS_LABELS[statusKey];
   block.textContent = 'Blocco ' + (data.chain_tip_height != null ? '#' + data.chain_tip_height : '—');
+
+  document.getElementById('maintenance-banner').classList.toggle('hidden', !data.lottery_paused);
 }
 
 let chainOnlyInterval = null;
@@ -669,6 +678,7 @@ function showDashboard() {
   stopChainOnlyPolling();
   document.getElementById('landing-hero').classList.add('hidden');
   document.getElementById('auth-section').classList.add('hidden');
+  document.getElementById('app-navbar').classList.remove('hidden');
   document.getElementById('dashboard-section').classList.remove('hidden');
   document.getElementById('dash-username').textContent = username;
   document.getElementById('dash-address').textContent = address;
@@ -732,6 +742,7 @@ function logout() {
   for (const key of Object.keys(drawStartedAt)) delete drawStartedAt[key];
   clearInterval(roundTimerInterval);
   clearTimeout(roundPollTimeout);
+  document.getElementById('app-navbar').classList.add('hidden');
   document.getElementById('dashboard-section').classList.add('hidden');
   document.getElementById('auth-section').classList.remove('hidden');
   document.getElementById('landing-hero').classList.remove('hidden');
diff --git a/docs/guida-admin.md b/docs/guida-admin.md
index eec478e..e54f463 100644
--- a/docs/guida-admin.md
+++ b/docs/guida-admin.md
@@ -54,6 +54,28 @@ hardcoded nel codice (`RoundConfig` in `app/db/models.py`: bet 10 PLM, round
 sat/vB, RBF timeout 900s) — vanno
 comunque rivisti e confermati dal pannello prima del primo utilizzo reale.
 
+## Manutenzione (pausa/ripresa lotteria)
+
+In cima alla sezione "Parametri" c'è una card "Manutenzione" con un pulsante
+per fermare l'apertura di nuovi round — utile per intervenire sul server
+(aggiornamenti, riavvii) senza lasciare gli utenti a metà di un round o
+sorprenderli con un'interruzione improvvisa.
+
+- **"Interrompi dopo questo round"**: il round eventualmente in corso viene
+  **completato normalmente** — chiude, estrae il vincitore da un blocco
+  confermato, e paga il 70/30 come sempre. Solo l'apertura del **round
+  successivo** viene sospesa. Gli utenti vedono un avviso di manutenzione
+  sulla loro dashboard (e sulla home, anche da sloggati) finché la lotteria
+  resta in pausa.
+- **"Riprendi lotteria"**: annulla la pausa — al prossimo giro dello
+  scheduler (ogni 5 secondi) un nuovo round si apre normalmente (rispettando
+  comunque il cooldown se il precedente si è appena chiuso).
+
+Ogni pausa/ripresa viene registrata nell'audit log (`lottery_paused` /
+`lottery_resumed`), ma — come per il resto del pannello — non registra
+*quale* operatore l'ha premuta (token condiviso, vedi limiti noti in
+[CLAUDE.md](../CLAUDE.md)).
+
 **Chi paga il fee-bump RBF?** Quando una bet, un payout o un prelievo resta
 troppo a lungo senza conferma (oltre il "Timeout prima del fee-bump RBF"), il
 sistema lo ritrasmette con una fee più alta. Il costo aggiuntivo lo assorbe
diff --git a/docs/guida-utente.md b/docs/guida-utente.md
index 105552d..c92d6ab 100644
--- a/docs/guida-utente.md
+++ b/docs/guida-utente.md
@@ -52,6 +52,14 @@ messaggio:
 
 Il messaggio resta visibile fino all'apertura del round successivo.
 
+### Avviso di manutenzione
+
+Se l'operatore ha messo in pausa la lotteria per manutenzione, in cima alla
+pagina (visibile anche prima del login) compare un avviso: il round
+eventualmente in corso viene comunque **completato normalmente**, vincitore
+incluso, ma **non ne parte uno nuovo** finché la manutenzione non termina.
+L'avviso sparisce da solo appena l'operatore riprende la lotteria.
+
 ### Deposito
 
 - Il tuo **saldo interno** (accreditato dopo 1 conferma di rete) con bottone
diff --git a/migrations/versions/5f2079b95b33_add_paused_to_round_config.py b/migrations/versions/5f2079b95b33_add_paused_to_round_config.py
new file mode 100644
index 0000000..b0355f5
--- /dev/null
+++ b/migrations/versions/5f2079b95b33_add_paused_to_round_config.py
@@ -0,0 +1,37 @@
+"""add paused to round_config
+
+Revision ID: 5f2079b95b33
+Revises: 1db52f3a7c67
+Create Date: 2026-07-22 00:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '5f2079b95b33'
+down_revision: Union[str, Sequence[str], None] = '1db52f3a7c67'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # server_default backfills the existing singleton row (if any); dropped right
+    # after so new rows go through the ORM default instead of a stale constant.
+    op.add_column(
+        'round_config', sa.Column('paused', sa.Boolean(), nullable=False, server_default=sa.false())
+    )
+    with op.batch_alter_table('round_config') as batch_op:
+        batch_op.alter_column('paused', server_default=None)
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('round_config', 'paused')
+    # ### end Alembic commands ###
diff --git a/tests/unit/test_admin.py b/tests/unit/test_admin.py
index 8e6829e..b7ed2f2 100644
--- a/tests/unit/test_admin.py
+++ b/tests/unit/test_admin.py
@@ -81,6 +81,29 @@ async def test_admin_reads_and_updates_config(client):
     assert resp.json()["fee_address"] == "plm1qfeeaddress"
 
 
+async def test_admin_can_pause_and_resume_the_lottery(client):
+    headers = {"X-Admin-Token": "test-admin-token"}
+
+    resp = await client.get("/admin/config", headers=headers)
+    assert resp.json()["paused"] is False
+
+    resp = await client.post("/admin/pause", headers=headers)
+    assert resp.status_code == 200
+    assert resp.json()["paused"] is True
+
+    resp = await client.get("/admin/config", headers=headers)
+    assert resp.json()["paused"] is True
+
+    resp = await client.post("/admin/resume", headers=headers)
+    assert resp.status_code == 200
+    assert resp.json()["paused"] is False
+
+
+async def test_admin_pause_requires_token(client):
+    resp = await client.post("/admin/pause")
+    assert resp.status_code == 403
+
+
 async def test_admin_lists_users(client):
     from app.db import base as db_base
     from app.db.models import User
diff --git a/tests/unit/test_rounds_service.py b/tests/unit/test_rounds_service.py
index 3c04de7..f5bb8aa 100644
--- a/tests/unit/test_rounds_service.py
+++ b/tests/unit/test_rounds_service.py
@@ -4,7 +4,7 @@ import pytest
 from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine
 
 from app.db.base import Base
-from app.db.models import Round
+from app.db.models import Round, RoundConfig
 from app.rounds.service import get_active_round, open_new_round_if_needed
 
 ROUND_COOLDOWN_SECONDS = 30  # matches RoundConfig.round_cooldown_seconds' column default
@@ -81,3 +81,27 @@ async def test_opens_new_round_once_cooldown_elapses(session_factory):
     async with session_factory() as session:
         round_ = await open_new_round_if_needed(session)
         assert round_.status == "open"
+
+
+async def test_withholds_new_round_while_paused(session_factory):
+    stale_close = datetime.now(timezone.utc) - timedelta(seconds=ROUND_COOLDOWN_SECONDS + 1)
+    async with session_factory() as session:
+        session.add(Round(status="closed", closed_at=stale_close))
+        session.add(RoundConfig(fee_address="", paused=True))
+        await session.commit()
+
+    async with session_factory() as session:
+        round_ = await open_new_round_if_needed(session)
+        assert round_ is None
+
+
+async def test_pause_does_not_interrupt_a_round_in_progress(session_factory):
+    async with session_factory() as session:
+        session.add(Round(status="drawing"))
+        session.add(RoundConfig(fee_address="", paused=True))
+        await session.commit()
+
+    async with session_factory() as session:
+        returned = await open_new_round_if_needed(session)
+        assert returned is not None
+        assert returned.status == "drawing"