Add prominent border boxes around each Vorgabe

- 3px solid blue border (#2c5aa0)
- Increased margin between Vorgaben (30px)
- Added subtle box shadow
- Support both Standards and dokumente class names

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

static/admin/css/vorgabe_border.css

@@ -1,14 +1,17 @@
 /* Style each Vorgabe inline block */
-.djn-dynamic-form-Standards-vorgabe {
-    border: 2px solid #ccc;
+.djn-dynamic-form-Standards-vorgabe,
+.djn-dynamic-form-dokumente-vorgabe {
+    border: 3px solid #2c5aa0;
     border-radius: 8px;
     padding: 15px;
-    margin-bottom: 20px;
+    margin-bottom: 30px;
     background-color: #f9f9f9;
+    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
 }
 
 /* Optional: Slight padding for inner fieldsets (e.g., Langtext/Kurztext inlines) */
-.djn-dynamic-form-Standards-vorgabe .inline-related {
+.djn-dynamic-form-Standards-vorgabe .inline-related,
+.djn-dynamic-form-dokumente-vorgabe .inline-related {
     margin-top: 10px;
     padding-left: 10px;
     border-left: 2px dashed #ccc;