diff --git a/package-lock.json b/package-lock.json
index 689e120..b4fcacc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "lageplan",
-  "version": "1.3.1",
+  "version": "1.3.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "lageplan",
-      "version": "1.3.1",
+      "version": "1.3.2",
       "hasInstallScript": true,
       "dependencies": {
         "@dnd-kit/core": "^6.1.0",
diff --git a/package.json b/package.json
index 429053b..48252b2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lageplan",
-  "version": "1.3.1",
+  "version": "1.3.2",
   "description": "Feuerwehr Lageplan - Krokier-App für Einsatzdokumentation",
   "private": true,
   "scripts": {
diff --git a/src/app/page.tsx b/src/app/page.tsx
index 634210c..cc6286f 100644
--- a/src/app/page.tsx
+++ b/src/app/page.tsx
@@ -1,30 +1,16 @@
-'use client'
-
 import Link from 'next/link'
 import { Button } from '@/components/ui/button'
 import { Logo } from '@/components/ui/logo'
-import { useAuth } from '@/components/providers/auth-provider'
-import { useRouter } from 'next/navigation'
-import { useEffect, useState } from 'react'
+import { NavAuthButtons } from '@/components/landing/nav-auth-buttons'
+import { ContactForm } from '@/components/landing/contact-form'
 import {
-  Flame, Map, Shield, Users, Smartphone, FileText, Ruler, Clock,
-  Check, ArrowRight, Lock, ChevronRight, MessageSquare, Loader2, Send,
+  Map, Shield, Users, Smartphone, FileText, Ruler, Clock,
+  Check, ArrowRight, Lock, ChevronRight, MessageSquare,
   Heart, Coffee, Rocket, Sparkles, Lightbulb, HelpCircle,
   MousePointer2, Minus, Pentagon, Square, Circle, Pencil, MoveRight, Type, Eraser,
 } from 'lucide-react'
 
 export default function LandingPage() {
-  const { user, loading } = useAuth()
-  const router = useRouter()
-
-  if (loading) {
-    return (
-      <div className="min-h-screen flex items-center justify-center bg-background">
-        <div className="animate-pulse text-muted-foreground">Laden...</div>
-      </div>
-    )
-  }
-
   const jsonLd = {
     '@context': 'https://schema.org',
     '@type': 'SoftwareApplication',
@@ -40,11 +26,6 @@ export default function LandingPage() {
       priceCurrency: 'CHF',
       description: 'Kostenlos für Schweizer Feuerwehren',
     },
-    aggregateRating: {
-      '@type': 'AggregateRating',
-      ratingValue: '4.8',
-      ratingCount: '12',
-    },
     author: {
       '@type': 'Organization',
       name: 'Lageplan.ch',
@@ -62,12 +43,79 @@ export default function LandingPage() {
     ],
   }
 
+  const faqJsonLd = {
+    '@context': 'https://schema.org',
+    '@type': 'FAQPage',
+    mainEntity: [
+      {
+        '@type': 'Question',
+        name: 'Was kostet Lageplan?',
+        acceptedAnswer: {
+          '@type': 'Answer',
+          text: 'Nichts. Lageplan ist kostenlos für alle Feuerwehren in der Schweiz. Die Entwicklung wird durch freiwillige Spenden finanziert.',
+        },
+      },
+      {
+        '@type': 'Question',
+        name: 'Brauche ich eine Installation?',
+        acceptedAnswer: {
+          '@type': 'Answer',
+          text: 'Nein. Lageplan läuft komplett im Browser — auf Desktop, Tablet und Smartphone. Einfach registrieren und loslegen.',
+        },
+      },
+      {
+        '@type': 'Question',
+        name: 'Funktioniert es auf dem Tablet im Einsatz?',
+        acceptedAnswer: {
+          '@type': 'Answer',
+          text: 'Ja. Die App ist für Touch-Bedienung optimiert und funktioniert auf allen modernen Tablets und Smartphones.',
+        },
+      },
+      {
+        '@type': 'Question',
+        name: 'Können mehrere Personen gleichzeitig arbeiten?',
+        acceptedAnswer: {
+          '@type': 'Answer',
+          text: 'Ja. Über Echtzeit-Synchronisation (WebSocket) können mehrere Benutzer gleichzeitig am selben Lageplan zeichnen und das Journal führen.',
+        },
+      },
+      {
+        '@type': 'Question',
+        name: 'Wo werden meine Daten gespeichert?',
+        acceptedAnswer: {
+          '@type': 'Answer',
+          text: 'Alle Daten werden auf Servern in der Schweiz gespeichert. Die Applikation ist DSG- und DSGVO-konform.',
+        },
+      },
+      {
+        '@type': 'Question',
+        name: 'Welche Symbole sind verfügbar?',
+        acceptedAnswer: {
+          '@type': 'Answer',
+          text: 'Alle 117 offiziellen FKS/BABS-Signaturen sind integriert. Zusätzlich können eigene Symbole hochgeladen werden.',
+        },
+      },
+      {
+        '@type': 'Question',
+        name: 'Kann ich Lagepläne exportieren?',
+        acceptedAnswer: {
+          '@type': 'Answer',
+          text: 'Ja. Lagepläne können als PNG oder PDF exportiert werden — inklusive Metadaten, Datum und Einsatzinformationen.',
+        },
+      },
+    ],
+  }
+
   return (
     <div className="min-h-screen bg-white">
       <script
         type="application/ld+json"
         dangerouslySetInnerHTML={{ __html: JSON.stringify(jsonLd) }}
       />
+      <script
+        type="application/ld+json"
+        dangerouslySetInnerHTML={{ __html: JSON.stringify(faqJsonLd) }}
+      />
       <main>
       {/* Navigation */}
       <nav className="fixed top-0 w-full z-50 bg-white/80 backdrop-blur-md border-b border-gray-100">
@@ -84,24 +132,7 @@ export default function LandingPage() {
               <a href="#roadmap" className="hover:text-gray-900 transition">Roadmap</a>
             </div>
             <div className="flex items-center gap-3">
-              {user ? (
-                <Link href="/app">
-                  <Button size="sm" className="bg-red-600 hover:bg-red-700">
-                    Zur App
-                  </Button>
-                </Link>
-              ) : (
-                <>
-                  <Link href="/login">
-                    <Button variant="ghost" size="sm">Anmelden</Button>
-                  </Link>
-                  <Link href="/register">
-                    <Button size="sm" className="bg-red-600 hover:bg-red-700">
-                      Kostenlos starten
-                    </Button>
-                  </Link>
-                </>
-              )}
+              <NavAuthButtons />
             </div>
           </div>
         </div>
@@ -564,39 +595,6 @@ function SupportSection() {
 }
 
 function ContactSection() {
-  const [name, setName] = useState('')
-  const [email, setEmail] = useState('')
-  const [message, setMessage] = useState('')
-  const [sending, setSending] = useState(false)
-  const [sent, setSent] = useState(false)
-  const [error, setError] = useState('')
-
-  const handleSubmit = async (e: React.FormEvent) => {
-    e.preventDefault()
-    setSending(true)
-    setError('')
-    try {
-      const res = await fetch('/api/contact', {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({ name, email, message }),
-      })
-      if (res.ok) {
-        setSent(true)
-        setName('')
-        setEmail('')
-        setMessage('')
-      } else {
-        const data = await res.json()
-        setError(data.error || 'Senden fehlgeschlagen')
-      }
-    } catch {
-      setError('Verbindung fehlgeschlagen')
-    } finally {
-      setSending(false)
-    }
-  }
-
   return (
     <section id="contact" className="py-20 px-4">
       <div className="max-w-2xl mx-auto">
@@ -607,67 +605,7 @@ function ContactSection() {
             Fragen, Feature-Wünsche oder Feedback? Schreib mir — ich freue mich über jede Nachricht.
           </p>
         </div>
-
-        {sent ? (
-          <div className="text-center bg-green-50 border border-green-200 rounded-xl p-8">
-            <Check className="w-10 h-10 text-green-600 mx-auto mb-3" />
-            <h3 className="font-semibold text-green-900 text-lg">Nachricht gesendet!</h3>
-            <p className="text-green-700 mt-2">Vielen Dank! Ich melde mich so schnell wie möglich.</p>
-            <Button variant="outline" className="mt-4" onClick={() => setSent(false)}>
-              Weitere Nachricht senden
-            </Button>
-          </div>
-        ) : (
-          <form onSubmit={handleSubmit} className="space-y-4">
-            <div className="grid sm:grid-cols-2 gap-4">
-              <div>
-                <label className="block text-sm font-medium text-gray-700 mb-1">Name</label>
-                <input
-                  type="text"
-                  value={name}
-                  onChange={e => setName(e.target.value)}
-                  required
-                  placeholder="Dein Name"
-                  className="w-full rounded-lg border border-gray-300 px-4 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-red-500 focus:border-transparent"
-                />
-              </div>
-              <div>
-                <label className="block text-sm font-medium text-gray-700 mb-1">E-Mail</label>
-                <input
-                  type="email"
-                  value={email}
-                  onChange={e => setEmail(e.target.value)}
-                  required
-                  placeholder="name@feuerwehr.ch"
-                  className="w-full rounded-lg border border-gray-300 px-4 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-red-500 focus:border-transparent"
-                />
-              </div>
-            </div>
-            <div>
-              <label className="block text-sm font-medium text-gray-700 mb-1">Nachricht</label>
-              <textarea
-                value={message}
-                onChange={e => setMessage(e.target.value)}
-                required
-                rows={5}
-                placeholder="Deine Nachricht..."
-                className="w-full rounded-lg border border-gray-300 px-4 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-red-500 focus:border-transparent resize-none"
-              />
-            </div>
-            {error && <p className="text-sm text-red-600">{error}</p>}
-            <Button
-              type="submit"
-              className="bg-red-600 hover:bg-red-700"
-              disabled={sending || !name || !email || !message}
-            >
-              {sending ? (
-                <><Loader2 className="w-4 h-4 mr-2 animate-spin" /> Wird gesendet...</>
-              ) : (
-                <><Send className="w-4 h-4 mr-2" /> Nachricht senden</>
-              )}
-            </Button>
-          </form>
-        )}
+        <ContactForm />
       </div>
     </section>
   )
diff --git a/src/app/sitemap.ts b/src/app/sitemap.ts
index 942320a..46058df 100644
--- a/src/app/sitemap.ts
+++ b/src/app/sitemap.ts
@@ -23,10 +23,10 @@ export default function sitemap(): MetadataRoute.Sitemap {
       priority: 0.8,
     },
     {
-      url: `${baseUrl}/impressum`,
+      url: `${baseUrl}/demo`,
       lastModified: new Date(),
-      changeFrequency: 'yearly',
-      priority: 0.3,
+      changeFrequency: 'monthly',
+      priority: 0.7,
     },
     {
       url: `${baseUrl}/spenden`,
@@ -34,5 +34,17 @@ export default function sitemap(): MetadataRoute.Sitemap {
       changeFrequency: 'monthly',
       priority: 0.5,
     },
+    {
+      url: `${baseUrl}/datenschutz`,
+      lastModified: new Date(),
+      changeFrequency: 'yearly',
+      priority: 0.3,
+    },
+    {
+      url: `${baseUrl}/impressum`,
+      lastModified: new Date(),
+      changeFrequency: 'yearly',
+      priority: 0.3,
+    },
   ]
 }
diff --git a/src/components/landing/contact-form.tsx b/src/components/landing/contact-form.tsx
new file mode 100644
index 0000000..171e5cd
--- /dev/null
+++ b/src/components/landing/contact-form.tsx
@@ -0,0 +1,105 @@
+'use client'
+
+import { useState } from 'react'
+import { Button } from '@/components/ui/button'
+import { Loader2, Send, Check } from 'lucide-react'
+
+export function ContactForm() {
+  const [name, setName] = useState('')
+  const [email, setEmail] = useState('')
+  const [message, setMessage] = useState('')
+  const [sending, setSending] = useState(false)
+  const [sent, setSent] = useState(false)
+  const [error, setError] = useState('')
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault()
+    setSending(true)
+    setError('')
+    try {
+      const res = await fetch('/api/contact', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ name, email, message }),
+      })
+      if (res.ok) {
+        setSent(true)
+        setName('')
+        setEmail('')
+        setMessage('')
+      } else {
+        const data = await res.json()
+        setError(data.error || 'Senden fehlgeschlagen')
+      }
+    } catch {
+      setError('Verbindung fehlgeschlagen')
+    } finally {
+      setSending(false)
+    }
+  }
+
+  if (sent) {
+    return (
+      <div className="text-center bg-green-50 border border-green-200 rounded-xl p-8">
+        <Check className="w-10 h-10 text-green-600 mx-auto mb-3" />
+        <h3 className="font-semibold text-green-900 text-lg">Nachricht gesendet!</h3>
+        <p className="text-green-700 mt-2">Vielen Dank! Ich melde mich so schnell wie möglich.</p>
+        <Button variant="outline" className="mt-4" onClick={() => setSent(false)}>
+          Weitere Nachricht senden
+        </Button>
+      </div>
+    )
+  }
+
+  return (
+    <form onSubmit={handleSubmit} className="space-y-4">
+      <div className="grid sm:grid-cols-2 gap-4">
+        <div>
+          <label className="block text-sm font-medium text-gray-700 mb-1">Name</label>
+          <input
+            type="text"
+            value={name}
+            onChange={e => setName(e.target.value)}
+            required
+            placeholder="Dein Name"
+            className="w-full rounded-lg border border-gray-300 px-4 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-red-500 focus:border-transparent"
+          />
+        </div>
+        <div>
+          <label className="block text-sm font-medium text-gray-700 mb-1">E-Mail</label>
+          <input
+            type="email"
+            value={email}
+            onChange={e => setEmail(e.target.value)}
+            required
+            placeholder="name@feuerwehr.ch"
+            className="w-full rounded-lg border border-gray-300 px-4 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-red-500 focus:border-transparent"
+          />
+        </div>
+      </div>
+      <div>
+        <label className="block text-sm font-medium text-gray-700 mb-1">Nachricht</label>
+        <textarea
+          value={message}
+          onChange={e => setMessage(e.target.value)}
+          required
+          rows={5}
+          placeholder="Deine Nachricht..."
+          className="w-full rounded-lg border border-gray-300 px-4 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-red-500 focus:border-transparent resize-none"
+        />
+      </div>
+      {error && <p className="text-sm text-red-600">{error}</p>}
+      <Button
+        type="submit"
+        className="bg-red-600 hover:bg-red-700"
+        disabled={sending || !name || !email || !message}
+      >
+        {sending ? (
+          <><Loader2 className="w-4 h-4 mr-2 animate-spin" /> Wird gesendet...</>
+        ) : (
+          <><Send className="w-4 h-4 mr-2" /> Nachricht senden</>
+        )}
+      </Button>
+    </form>
+  )
+}
diff --git a/src/components/landing/nav-auth-buttons.tsx b/src/components/landing/nav-auth-buttons.tsx
new file mode 100644
index 0000000..ead7193
--- /dev/null
+++ b/src/components/landing/nav-auth-buttons.tsx
@@ -0,0 +1,36 @@
+'use client'
+
+import Link from 'next/link'
+import { Button } from '@/components/ui/button'
+import { useAuth } from '@/components/providers/auth-provider'
+
+export function NavAuthButtons() {
+  const { user, loading } = useAuth()
+
+  if (loading) {
+    return <div className="w-24 h-9" /> // placeholder to avoid layout shift
+  }
+
+  if (user) {
+    return (
+      <Link href="/app">
+        <Button size="sm" className="bg-red-600 hover:bg-red-700">
+          Zur App
+        </Button>
+      </Link>
+    )
+  }
+
+  return (
+    <>
+      <Link href="/login">
+        <Button variant="ghost" size="sm">Anmelden</Button>
+      </Link>
+      <Link href="/register">
+        <Button size="sm" className="bg-red-600 hover:bg-red-700">
+          Kostenlos starten
+        </Button>
+      </Link>
+    </>
+  )
+}
diff --git a/src/components/map/map-view.tsx b/src/components/map/map-view.tsx
index 1099bc5..5f394be 100644
--- a/src/components/map/map-view.tsx
+++ b/src/components/map/map-view.tsx
@@ -728,6 +728,46 @@ export function MapView({
     // Expose map instance to parent for export
     if (externalMapRef) externalMapRef.current = map.current
 
+    // --- WebGL context loss recovery ---
+    // When the browser reclaims GPU memory (background tab, memory pressure),
+    // the WebGL context is lost and tiles go black. This recovers automatically.
+    const canvas = map.current.getCanvas()
+    canvas.addEventListener('webglcontextlost', (e) => {
+      console.warn('[Map] WebGL context lost — will restore when possible')
+      e.preventDefault() // allows context to be restored
+    })
+    canvas.addEventListener('webglcontextrestored', () => {
+      console.info('[Map] WebGL context restored — reloading map style')
+      const m = map.current
+      if (m) {
+        // Force full tile reload by re-setting the style
+        const style = m.getStyle()
+        if (style) {
+          m.setStyle(style)
+        }
+      }
+    })
+
+    // --- Page visibility recovery ---
+    // When user switches back to this tab after a while, tiles may be stale/black.
+    // Force a resize + tile re-request on visibility change.
+    const handleVisibilityChange = () => {
+      if (document.visibilityState === 'visible' && map.current) {
+        // Small delay to let browser finish tab switch
+        setTimeout(() => {
+          if (!map.current) return
+          map.current.resize()
+          // Nudge the map to force tile re-requests
+          const center = map.current.getCenter()
+          map.current.setCenter(center)
+        }, 100)
+      }
+    }
+    document.addEventListener('visibilitychange', handleVisibilityChange)
+
+    // Store cleanup reference
+    const cleanupVisibility = () => document.removeEventListener('visibilitychange', handleVisibilityChange)
+
     map.current.addControl(new maplibregl.NavigationControl(), 'bottom-right')
     map.current.addControl(new maplibregl.ScaleControl(), 'bottom-left')
 
@@ -1286,6 +1326,7 @@ export function MapView({
     })
 
     return () => {
+      cleanupVisibility()
       map.current?.remove()
       map.current = null
     }
@@ -1421,26 +1462,27 @@ export function MapView({
           const lineCoords = f.geometry.coordinates as number[][]
           if (lineCoords.length < 2) return
 
-          // Get last two points to calculate arrow direction using screen-projected coords
+          // Geographic bearing from p1 to p2 (works for short distances)
           const p1 = lineCoords[lineCoords.length - 2]
           const p2 = lineCoords[lineCoords.length - 1]
-          const px1 = map.current.project(p1 as [number, number])
-          const px2 = map.current.project(p2 as [number, number])
-          const screenAngle = Math.atan2(px2.y - px1.y, px2.x - px1.x) * (180 / Math.PI) + 90
+          const dLng = p2[0] - p1[0]
+          const dLat = p2[1] - p1[1]
+          // atan2(dLng, dLat) gives angle from north (up), clockwise — matches CSS triangle ▲ default
+          const geoBearing = Math.atan2(dLng, dLat) * (180 / Math.PI)
 
           const color = (f.properties.color as string) || '#000000'
           const arrowEl = document.createElement('div')
           arrowEl.style.cssText = `
             width: 0; height: 0;
-            border-left: 10px solid transparent;
-            border-right: 10px solid transparent;
-            border-bottom: 20px solid ${color};
-            transform: rotate(${screenAngle}deg);
+            border-left: 12px solid transparent;
+            border-right: 12px solid transparent;
+            border-bottom: 24px solid ${color};
+            transform: rotate(${geoBearing}deg);
             transform-origin: center center;
             pointer-events: none;
           `
 
-          const marker = new maplibregl.Marker({ element: arrowEl, anchor: 'center', rotationAlignment: 'viewport' })
+          const marker = new maplibregl.Marker({ element: arrowEl, anchor: 'center', rotationAlignment: 'map' })
             .setLngLat(p2 as [number, number])
             .addTo(map.current)
           markersRef.current.push(marker)
@@ -1545,7 +1587,7 @@ export function MapView({
           })
         }
 
-        const marker = new maplibregl.Marker({ element: el, anchor: 'center', draggable: canEdit, rotationAlignment: 'viewport' })
+        const marker = new maplibregl.Marker({ element: el, anchor: 'center', draggable: canEdit, rotationAlignment: 'map' })
           .setLngLat(midpoint)
           .addTo(map.current)
 
@@ -1664,7 +1706,7 @@ export function MapView({
           }
 
           try {
-            const marker = new maplibregl.Marker({ element: wrapper, draggable: canEdit, anchor: 'center', rotationAlignment: 'viewport' })
+            const marker = new maplibregl.Marker({ element: wrapper, draggable: canEdit, anchor: 'center', rotationAlignment: 'map' })
               .setLngLat(coords)
               .addTo(map.current)
 
@@ -1730,7 +1772,7 @@ export function MapView({
           el.textContent = (f.properties.text as string) || ''
           wrapper.appendChild(el)
 
-          const marker = new maplibregl.Marker({ element: wrapper, draggable: canEdit, anchor: 'center', rotationAlignment: 'viewport' })
+          const marker = new maplibregl.Marker({ element: wrapper, draggable: canEdit, anchor: 'center', rotationAlignment: 'map' })
             .setLngLat(coords)
             .addTo(map.current)
 
@@ -1892,18 +1934,27 @@ export function MapView({
     }
   }, [drawMode, deselectSymbol])
 
-  // ESC to cancel drawing, DEL to delete selected symbol
+  // ESC to cancel drawing, DEL to delete selected symbol/line/polygon
   useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
-      // DEL / Backspace → delete selected symbol
+      // DEL / Backspace → delete selected symbol or line/polygon
       if (e.key === 'Delete' || e.key === 'Backspace') {
         const tag = (e.target as HTMLElement)?.tagName
         if (tag === 'INPUT' || tag === 'TEXTAREA' || tag === 'SELECT' || (e.target as HTMLElement)?.isContentEditable) return
+        // Delete selected symbol/text
         if (selectedSymbolRef.current) {
           e.preventDefault()
           deleteSelectedSymbol()
           return
         }
+        // Delete selected line/polygon/arrow (vertex-editing selection)
+        if (selectedLineIdRef.current) {
+          e.preventDefault()
+          const updated = featuresRef.current.filter(f => f.id !== selectedLineIdRef.current)
+          onFeaturesChangeRef.current(updated)
+          showVertexMarkersRef.current(null)
+          return
+        }
       }
       if (e.key === 'Escape') {
         // In measure mode: finalize (keep line + labels), just stop adding
diff --git a/src/stores/tool-store.ts b/src/stores/tool-store.ts
index f826092..8795c65 100644
--- a/src/stores/tool-store.ts
+++ b/src/stores/tool-store.ts
@@ -21,7 +21,7 @@ interface ToolStore {
 
 export const useToolStore = create<ToolStore>((set) => ({
   activeTool: 'select',
-  activeColor: '#ff0000', // Default Rot
+  activeColor: '#000000', // Default Schwarz
   lineType: 'solid',
   lineWidth: 3,
   selectedFeatureId: null,