more style fixes

stylesheets/styles_light.css

@@ -733,9 +733,18 @@ section .credits.right {
     margin-top: -20px;
   }
 
-  nav {
+  .credits, #foot_image, nav {
     display: none;
   }
+
+  .wrapper {
+      padding-bottom: 0;
+  }
+
+}
+
+.clear {
+    clear:both;
 }
 
 .MathJax_Display {
@@ -759,6 +768,7 @@ nav li {
 .switcher {
     float:left;
     line-height: 2em;
+    margin-right: 1em;
 }
 
 .float-right {