New themes for custom alert: success, danger, primary

_sass/minima/_lcsb.scss

@@ -35,6 +35,24 @@ div.alert.info {
   color: #045689;
 }
 
+div.alert.success {
+  border-color: #eeffff;
+  background-color: #d5eadb;
+  color: #048956;
+}
+
+div.alert.danger {
+  border-color: #f6c6cf;
+  background-color: #f8ddd3;
+  color: #721a1c;
+}
+
+div.alert.primary {
+  border-color: #b9dbfe;
+  background-color: #cde6fe;
+  color: #014184;
+}
+
 // Normal (desktop) ========================================================
 .img-uni-lu {
   bottom: -2px;