Improve styles and content consistency across multiple pages

Standardized H2 headings with a new `.h2-as-text` class for better alignment and styling. Adjusted footer and layout widths to 1200px for improved responsiveness. Updated the KI-Agents profiles, webinar section, and various style modules to ensure consistent formatting, better readability, and cleaner design.

docs/stylesheets/modules/webinar.scss

@@ -12,4 +12,50 @@
       background-color: #000 !important;
     }
   }
-}
+}
+
+// Webinar dates styling
+.satag--webinar-dates {
+  margin: 2rem 0;
+}
+
+.satag--webinar-item {
+  margin-bottom: 1.5rem;
+  padding-bottom: 1.5rem;
+
+  &:last-child {
+    padding-bottom: 0;
+  }
+}
+
+.satag--webinar-date {
+  font-weight: bold;
+  margin-bottom: 0.25rem;
+
+  i {
+    margin-right: 0.5rem;
+    width: 1rem;
+    text-align: center;
+  }
+}
+
+.satag--webinar-time {
+  margin-bottom: 0.5rem;
+  color: white;
+
+  i {
+    margin-right: 0.5rem;
+    width: 1rem;
+    text-align: center;
+  }
+}
+
+.satag--webinar-course {
+  margin-bottom: 0.25rem;
+}
+
+.satag--webinar-type {
+  font-size: 0.9rem;
+  color: #666;
+  font-style: italic;
+}