About locked image: 13px blur overlay + CTA with Telegram link

css/styles.css

@@ -896,18 +896,59 @@ body[data-lang="en"] .hide-de { display: none !important; }
 }
 
 /* Locked image nach Unsere Themen — nur sichtbar wenn nicht eingeloggt */
-.about-locked-img {
+.about-locked-wrap {
+  position: relative;
   display: block;
   width: 100%;
   max-width: 800px;
   height: auto;
   margin: 32px auto 0;
   border-radius: 16px;
-  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
+  overflow: hidden;
 }
-[data-loggedIn="true"] .about-locked-img {
+[data-loggedIn="true"] .about-locked-wrap {
   display: none;
 }
+.about-locked-img {
+  display: block;
+  width: 100%;
+  height: auto;
+  border-radius: 16px;
+}
+.about-locked-blur {
+  position: absolute;
+  inset: 0;
+  border-radius: 16px;
+  backdrop-filter: blur(13px);
+  -webkit-backdrop-filter: blur(13px);
+  background: rgba(255,255,255,0.15);
+}
+.about-locked-overlay {
+  position: absolute;
+  inset: 0;
+  border-radius: 16px;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 12px;
+  padding: 24px;
+}
+.about-locked-icon { font-size: 2.5rem; }
+.about-locked-text {
+  font-size: 1rem;
+  color: #fff;
+  text-align: center;
+  line-height: 1.5;
+  font-weight: 600;
+  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
+}
+.about-locked-btn {
+  display: inline-flex !important;
+  align-items: center;
+  gap: 8px;
+  margin-top: 4px;
+}
 
 /* ========================================
    SEARCH