updating carbonad styling

src/assets/less/site-3.0.0.less

@@ -16,3 +16,4 @@
 @import "site/example-rating";
 @import "site/footer";
 @import "site/lazy";
+@import "site/carbonad";

src/assets/less/site/carbonad.less

@@ -0,0 +1,7 @@
+#carbonads-container {
+  .carbonad {
+    background: @table-bg-accent;
+    border-color: @table-border-color;
+    border-radius: (@border-radius-base);
+  }
+}