improve footer css style

pboard/pboard/public/css/style.css

@@ -30,8 +30,8 @@
 
 /* Footer styling */
 .footer {
-    margin-top: 45px;
-    padding: 35px 0 36px;
+    margin-top: 2em;
+    padding: 0.5em 0 36px;
     border-top: 1px solid #e5e5e5;
 }