diff --git a/countdown.html b/countdown.html
index caaf132..6b9112f 100644
--- a/countdown.html
+++ b/countdown.html
@@ -398,12 +398,26 @@
     }
   });
 
-  // PWA SW
+  // PWA Service Worker — Network-First Strategie (Updates kommen sofort durch)
   if ('serviceWorker' in navigator) {
     window.addEventListener('load', function() {
       navigator.serviceWorker.register('./sw.js')
-        .then(function(r){ console.log('[PWA] SW registered:', r.scope); })
-        .catch(function(e){ console.warn('[PWA] SW failed:', e); });
+        .then(function(reg) {
+          console.log('[PWA] SW registered:', reg.scope);
+          reg.addEventListener('updatefound', function() {
+            var newSw = reg.installing;
+            if (!newSw) return;
+            newSw.addEventListener('statechange', function() {
+              if (newSw.state === 'activated' && navigator.serviceWorker.controller) {
+                console.log('[PWA] Neue Version aktiviert');
+                if (window.confirm('🔄 Neue Version der JGA-Seite verfügbar — jetzt neu laden?')) {
+                  window.location.reload();
+                }
+              }
+            });
+          });
+        })
+        .catch(function(err) { console.warn('[PWA] SW failed:', err); });
     });
   }
 </script>
diff --git a/index.html b/index.html
index 376c753..d62cf68 100644
--- a/index.html
+++ b/index.html
@@ -886,10 +886,26 @@
     });
   });
 
-  /* ===== PWA Service Worker ===== */
+  // PWA Service Worker — Network-First Strategie (Updates kommen sofort durch)
   if ('serviceWorker' in navigator) {
     window.addEventListener('load', () => {
-      navigator.serviceWorker.register('./sw.js').catch(() => {});
+      navigator.serviceWorker.register('./sw.js')
+        .then(reg => {
+          console.log('[PWA] SW registered:', reg.scope);
+          reg.addEventListener('updatefound', () => {
+            const newSw = reg.installing;
+            if (!newSw) return;
+            newSw.addEventListener('statechange', () => {
+              if (newSw.state === 'activated' && navigator.serviceWorker.controller) {
+                console.log('[PWA] Neue Version aktiviert');
+                if (window.confirm('🔄 Neue Version der JGA-Seite verfügbar — jetzt neu laden?')) {
+                  window.location.reload();
+                }
+              }
+            });
+          });
+        })
+        .catch(err => console.warn('[PWA] SW registration failed:', err));
     });
   }
 </script>
diff --git a/memory.html b/memory.html
index 0d261b7..296e8f4 100644
--- a/memory.html
+++ b/memory.html
@@ -1219,9 +1219,30 @@ if (!state.setupDone) {
 }
 checkStorage();
 
-if ('serviceWorker' in navigator) {
-  navigator.serviceWorker.register('sw.js').catch(() => {});
-}
+  // PWA Service Worker — Network-First Strategie (Updates kommen sofort durch)
+  if ('serviceWorker' in navigator) {
+    window.addEventListener('load', () => {
+      navigator.serviceWorker.register('./sw.js')
+        .then(reg => {
+          console.log('[PWA] SW registered:', reg.scope);
+          // Update-Hook: wenn ein neuer SW installiert wurde, kurz reloaden
+          reg.addEventListener('updatefound', () => {
+            const newSw = reg.installing;
+            if (!newSw) return;
+            newSw.addEventListener('statechange', () => {
+              if (newSw.state === 'activated' && navigator.serviceWorker.controller) {
+                console.log('[PWA] Neue Version aktiviert — lade neu');
+                // Sanfter Reload ohne Datenverlust, Cache-Bust mit Timestamp
+                if (window.confirm('🔄 Neue Version der JGA-Seite verfügbar — jetzt neu laden?')) {
+                  window.location.reload();
+                }
+              }
+            });
+          });
+        })
+        .catch(err => console.warn('[PWA] SW registration failed:', err));
+    });
+  }
 </script>
 
 </body>
diff --git a/packliste.html b/packliste.html
index 71af452..9cce70d 100644
--- a/packliste.html
+++ b/packliste.html
@@ -381,11 +381,27 @@
   updateProgress();
 </script>
 <script>
-  // PWA Service Worker registrieren
+    // PWA Service Worker — Network-First Strategie (Updates kommen sofort durch)
   if ('serviceWorker' in navigator) {
     window.addEventListener('load', () => {
       navigator.serviceWorker.register('./sw.js')
-        .then(reg => console.log('[PWA] SW registered:', reg.scope))
+        .then(reg => {
+          console.log('[PWA] SW registered:', reg.scope);
+          // Update-Hook: wenn ein neuer SW installiert wurde, kurz reloaden
+          reg.addEventListener('updatefound', () => {
+            const newSw = reg.installing;
+            if (!newSw) return;
+            newSw.addEventListener('statechange', () => {
+              if (newSw.state === 'activated' && navigator.serviceWorker.controller) {
+                console.log('[PWA] Neue Version aktiviert — lade neu');
+                // Sanfter Reload ohne Datenverlust, Cache-Bust mit Timestamp
+                if (window.confirm('🔄 Neue Version der JGA-Seite verfügbar — jetzt neu laden?')) {
+                  window.location.reload();
+                }
+              }
+            });
+          });
+        })
         .catch(err => console.warn('[PWA] SW registration failed:', err));
     });
   }
diff --git a/strafen.html b/strafen.html
index 0799312..a3b6746 100644
--- a/strafen.html
+++ b/strafen.html
@@ -782,9 +782,30 @@ renderPool();
 renderStats();
 renderHistory();
 
-if ('serviceWorker' in navigator) {
-  navigator.serviceWorker.register('sw.js').catch(() => {});
-}
+  // PWA Service Worker — Network-First Strategie (Updates kommen sofort durch)
+  if ('serviceWorker' in navigator) {
+    window.addEventListener('load', () => {
+      navigator.serviceWorker.register('./sw.js')
+        .then(reg => {
+          console.log('[PWA] SW registered:', reg.scope);
+          // Update-Hook: wenn ein neuer SW installiert wurde, kurz reloaden
+          reg.addEventListener('updatefound', () => {
+            const newSw = reg.installing;
+            if (!newSw) return;
+            newSw.addEventListener('statechange', () => {
+              if (newSw.state === 'activated' && navigator.serviceWorker.controller) {
+                console.log('[PWA] Neue Version aktiviert — lade neu');
+                // Sanfter Reload ohne Datenverlust, Cache-Bust mit Timestamp
+                if (window.confirm('🔄 Neue Version der JGA-Seite verfügbar — jetzt neu laden?')) {
+                  window.location.reload();
+                }
+              }
+            });
+          });
+        })
+        .catch(err => console.warn('[PWA] SW registration failed:', err));
+    });
+  }
 </script>
 
 </body>
diff --git a/sw.js b/sw.js
index 8568587..b05b22a 100644
--- a/sw.js
+++ b/sw.js
@@ -1,74 +1,116 @@
 // JGA Prag 2026 — Service Worker
-// Cache-Strategie: cache-first für HTML/Assets, network-first für externe APIs (OSRM)
-const CACHE_VERSION = 'jga-2026-v3';
-const CORE_ASSETS = [
-  './',
-  './index.html',
-  './tourenplan.html',
-  './tourenplan-mit-tram.html',
-  './wetter.html',
-  './packliste.html',
-  './countdown.html',
-  './trinkspiel.html',
-  './strafen.html',
-  './memory.html',
+// Cache-Strategie:
+//   • Eigene HTML/JS/CSS  → network-first (immer frisch laden, Fallback Cache offline)
+//   • Map-Tiles (OSM)     → cache-first (für Offline-Karten)
+//   • Externe APIs (OSRM) → network-only (kein Cache)
+const CACHE_VERSION = 'jga-2026-v4';
+const TILE_CACHE = 'jga-2026-tiles-v4';
+const PAGE_CACHE = 'jga-2026-pages-v4';
+
+// Nur Map-Tiles werden offline gecached — KEINE eigenen HTML-Files
+const PRECACHE_URLS = [
   './manifest.json'
 ];
 
-// Install: alle Core-Files cachen
+// Install: nur manifest precachen, KEINE HTML-Files
 self.addEventListener('install', (event) => {
   event.waitUntil(
-    caches.open(CACHE_VERSION)
-      .then(cache => cache.addAll(CORE_ASSETS))
+    caches.open(PAGE_CACHE)
+      .then(cache => cache.addAll(PRECACHE_URLS))
       .then(() => self.skipWaiting())
   );
 });
 
-// Activate: alte Caches aufräumen
+// Activate: alle alten Caches (inkl. v3, v2, v1) löschen
 self.addEventListener('activate', (event) => {
   event.waitUntil(
     caches.keys()
       .then(keys => Promise.all(
-        keys.filter(k => k !== CACHE_VERSION).map(k => caches.delete(k))
+        keys
+          .filter(k => k !== CACHE_VERSION && k !== TILE_CACHE && k !== PAGE_CACHE)
+          .map(k => caches.delete(k))
       ))
-      .then(() => self.clients.claim())
+      .then(async () => {
+        // Auch alte Tile- und Page-Caches aufräumen
+        const old = await caches.keys();
+        await Promise.all(
+          old
+            .filter(k => k.startsWith('jga-2026-') && k !== CACHE_VERSION && k !== TILE_CACHE && k !== PAGE_CACHE)
+            .map(k => caches.delete(k))
+        );
+        await self.clients.claim();
+      })
   );
 });
 
-// Fetch: cache-first für eigene Files, network-first für externe APIs
+// Fetch-Handler
 self.addEventListener('fetch', (event) => {
-  const url = new URL(event.request.url);
+  const req = event.request;
+  if (req.method !== 'GET') return;
 
-  // Externe APIs (OSRM, OpenStreetMap, Wetter) → network-first
+  const url = new URL(req.url);
+
+  // ─── Externe APIs (OSRM, Open-Meteo) → network-only, kein Cache ───
   if (url.origin !== self.location.origin) {
-    event.respondWith(
-      fetch(event.request)
-        .then(response => {
-          // Erfolgreich: clone & cache für offline
-          if (response.ok && (url.hostname.includes('openstreetmap') ||
-                              url.hostname.includes('cartocdn') ||
-                              url.hostname.includes('unpkg'))) {
-            const clone = response.clone();
-            caches.open(CACHE_VERSION).then(c => c.put(event.request, clone));
-          }
-          return response;
-        })
-        .catch(() => caches.match(event.request))
-    );
-    return;
+    // Map-Tiles (OSM / Carto / unpkg Leaflet) → cache-first
+    if (
+      url.hostname.includes('openstreetmap') ||
+      url.hostname.includes('cartocdn') ||
+      url.hostname.includes('tile.openstreetmap')
+    ) {
+      event.respondWith(cacheFirst(req, TILE_CACHE));
+      return;
+    }
+    // Alles andere extern → einfach durch, kein Caching
+    return; // default browser behavior
   }
 
-  // Eigene Files → cache-first
-  event.respondWith(
-    caches.match(event.request)
-      .then(cached => cached || fetch(event.request)
-        .then(response => {
-          if (response.ok) {
-            const clone = response.clone();
-            caches.open(CACHE_VERSION).then(c => c.put(event.request, clone));
-          }
-          return response;
-        })
-      )
-  );
-});
\ No newline at end of file
+  // ─── Eigene Files (HTML/JS/CSS/JSON) → network-first ───
+  // Immer versuchen frisch zu laden, nur bei Offline-Fallback aus Cache
+  event.respondWith(networkFirst(req, PAGE_CACHE));
+});
+
+// Network-first: frisch vom Netz, Fallback auf Cache (offline)
+async function networkFirst(request, cacheName) {
+  const cache = await caches.open(cacheName);
+  try {
+    const response = await fetch(request, { cache: 'no-store' });
+    if (response.ok) {
+      cache.put(request, response.clone());
+    }
+    return response;
+  } catch (err) {
+    const cached = await cache.match(request);
+    if (cached) return cached;
+    // Letzter Fallback: index.html (für SPA-ähnliches Verhalten)
+    if (request.mode === 'navigate') {
+      const fallback = await cache.match('./index.html');
+      if (fallback) return fallback;
+    }
+    throw err;
+  }
+}
+
+// Cache-first: aus Cache, Fallback aufs Netz (für Tiles)
+async function cacheFirst(request, cacheName) {
+  const cache = await caches.open(cacheName);
+  const cached = await cache.match(request);
+  if (cached) return cached;
+  try {
+    const response = await fetch(request);
+    if (response.ok) {
+      cache.put(request, response.clone());
+    }
+    return response;
+  } catch (err) {
+    // Tile offline + nicht im Cache → leere 503
+    return new Response('', { status: 503, statusText: 'Tile offline' });
+  }
+}
+
+// Clients über neues Update benachrichtigen
+self.addEventListener('message', (event) => {
+  if (event.data && event.data.type === 'SKIP_WAITING') {
+    self.skipWaiting();
+  }
+});
diff --git a/tourenplan-mit-tram.html b/tourenplan-mit-tram.html
index d62cff1..6ab64b5 100644
--- a/tourenplan-mit-tram.html
+++ b/tourenplan-mit-tram.html
@@ -1148,11 +1148,27 @@ document.addEventListener('keydown', (e) => {
   });
 </script>
 <script>
-  // PWA Service Worker registrieren
+    // PWA Service Worker — Network-First Strategie (Updates kommen sofort durch)
   if ('serviceWorker' in navigator) {
     window.addEventListener('load', () => {
       navigator.serviceWorker.register('./sw.js')
-        .then(reg => console.log('[PWA] SW registered:', reg.scope))
+        .then(reg => {
+          console.log('[PWA] SW registered:', reg.scope);
+          // Update-Hook: wenn ein neuer SW installiert wurde, kurz reloaden
+          reg.addEventListener('updatefound', () => {
+            const newSw = reg.installing;
+            if (!newSw) return;
+            newSw.addEventListener('statechange', () => {
+              if (newSw.state === 'activated' && navigator.serviceWorker.controller) {
+                console.log('[PWA] Neue Version aktiviert — lade neu');
+                // Sanfter Reload ohne Datenverlust, Cache-Bust mit Timestamp
+                if (window.confirm('🔄 Neue Version der JGA-Seite verfügbar — jetzt neu laden?')) {
+                  window.location.reload();
+                }
+              }
+            });
+          });
+        })
         .catch(err => console.warn('[PWA] SW registration failed:', err));
     });
   }
diff --git a/tourenplan.html b/tourenplan.html
index 1d97e83..cb28725 100644
--- a/tourenplan.html
+++ b/tourenplan.html
@@ -664,11 +664,27 @@ legend.addTo(map);
   });
 </script>
 <script>
-  // PWA Service Worker registrieren
+    // PWA Service Worker — Network-First Strategie (Updates kommen sofort durch)
   if ('serviceWorker' in navigator) {
     window.addEventListener('load', () => {
       navigator.serviceWorker.register('./sw.js')
-        .then(reg => console.log('[PWA] SW registered:', reg.scope))
+        .then(reg => {
+          console.log('[PWA] SW registered:', reg.scope);
+          // Update-Hook: wenn ein neuer SW installiert wurde, kurz reloaden
+          reg.addEventListener('updatefound', () => {
+            const newSw = reg.installing;
+            if (!newSw) return;
+            newSw.addEventListener('statechange', () => {
+              if (newSw.state === 'activated' && navigator.serviceWorker.controller) {
+                console.log('[PWA] Neue Version aktiviert — lade neu');
+                // Sanfter Reload ohne Datenverlust, Cache-Bust mit Timestamp
+                if (window.confirm('🔄 Neue Version der JGA-Seite verfügbar — jetzt neu laden?')) {
+                  window.location.reload();
+                }
+              }
+            });
+          });
+        })
         .catch(err => console.warn('[PWA] SW registration failed:', err));
     });
   }
diff --git a/trinkspiel.html b/trinkspiel.html
index 6dbc409..103e860 100644
--- a/trinkspiel.html
+++ b/trinkspiel.html
@@ -1178,9 +1178,30 @@ renderGameInfo();
 document.getElementById('drawStatus').textContent = `Karten im Deck: ${currentDeck.length}`;
 
 /* ===== Service Worker ===== */
-if ('serviceWorker' in navigator) {
-  navigator.serviceWorker.register('sw.js').catch(() => {});
-}
+  // PWA Service Worker — Network-First Strategie (Updates kommen sofort durch)
+  if ('serviceWorker' in navigator) {
+    window.addEventListener('load', () => {
+      navigator.serviceWorker.register('./sw.js')
+        .then(reg => {
+          console.log('[PWA] SW registered:', reg.scope);
+          // Update-Hook: wenn ein neuer SW installiert wurde, kurz reloaden
+          reg.addEventListener('updatefound', () => {
+            const newSw = reg.installing;
+            if (!newSw) return;
+            newSw.addEventListener('statechange', () => {
+              if (newSw.state === 'activated' && navigator.serviceWorker.controller) {
+                console.log('[PWA] Neue Version aktiviert — lade neu');
+                // Sanfter Reload ohne Datenverlust, Cache-Bust mit Timestamp
+                if (window.confirm('🔄 Neue Version der JGA-Seite verfügbar — jetzt neu laden?')) {
+                  window.location.reload();
+                }
+              }
+            });
+          });
+        })
+        .catch(err => console.warn('[PWA] SW registration failed:', err));
+    });
+  }
 </script>
 
 </body>
diff --git a/wetter.html b/wetter.html
index 9255faa..3e7eea6 100644
--- a/wetter.html
+++ b/wetter.html
@@ -187,11 +187,26 @@ h1 { font-size:42px; margin:0 0 8px 0; font-weight:700; letter-spacing:-1px; col
 })();
 </script>
 <script>
+// PWA Service Worker — Network-First Strategie (Updates kommen sofort durch)
 if ("serviceWorker" in navigator) {
   window.addEventListener("load", function() {
     navigator.serviceWorker.register("./sw.js")
-      .then(function(r){ console.log("[PWA] SW registered:", r.scope); })
-      .catch(function(e){ console.warn("[PWA] SW registration failed:", e); });
+      .then(function(reg) {
+        console.log("[PWA] SW registered:", reg.scope);
+        reg.addEventListener("updatefound", function() {
+          var newSw = reg.installing;
+          if (!newSw) return;
+          newSw.addEventListener("statechange", function() {
+            if (newSw.state === "activated" && navigator.serviceWorker.controller) {
+              console.log("[PWA] Neue Version aktiviert");
+              if (window.confirm("🔄 Neue Version der JGA-Seite verfügbar — jetzt neu laden?")) {
+                window.location.reload();
+              }
+            }
+          });
+        });
+      })
+      .catch(function(err) { console.warn("[PWA] SW registration failed:", err); });
   });
 }
 </script>