ISTWCMS-4686: Theme block-uw-cbl-special-alert

source/_patterns/03-layouts/site-container/_site-container.scss

@@ -26,6 +26,23 @@
     }
   }
 
+  .block-uw-cbl-special-alert {
+    background: #f0f0f0;
+    border: 2px solid #96172e;
+    margin: 1em 0;
+    padding: 1em;
+
+    // Prevent excess space at top from elements that have a margin-top.
+    > *:first-child {
+      margin-top: 0;
+    }
+
+    // Prevent excess space at bottom from elements that have a margin-bottom.
+    > *:last-child {
+      margin-bottom: 0;
+    }
+  }
+
   .uw-main {
     grid-column: 1 / 2;
     grid-row: 3 / 4;