adding some basic flexbox stuff

stylesheets/application.css

@@ -487,6 +487,15 @@
     display: none;
 }
 
+.theme-Baupm .columns {
+    display: flex;
+    flex-flow: row wrap;
+    justify-content: space-around;
+}
+.theme-Baupm .columns .column {
+    flex: 1 100%;
+}
+
 @media screen and (max-width: 899px) {
     .theme-Baupm #header {
         color: #999;