(Basic) styling for nav on larger screens.

templates/2k11/admin/style.css

@@ -1226,11 +1226,6 @@ summary {
     background: #ccdde7;
 }
 
-#main_menu {
-    padding-bottom: .75em;
-}
-
-
 .js #main_menu {
     clip: rect(0 0 0 0);
     display: block;
@@ -1249,6 +1244,10 @@ summary {
     visibility: hidden;
 }
 
+#main_menu > ul {
+    margin-bottom: .75em;
+}
+
 #main_menu li > ul > li {
     float: left;
     width: 50%;
@@ -1478,7 +1477,7 @@ form > .button_link:first-of-type,
     border-bottom: 1px solid #aaa;
     font-size: 1em;
     margin: 0 -1em;
-    padding: .75em 1em;
+    padding: .5em 1em;
 }
 
 #dashboard > section {
@@ -2078,10 +2077,6 @@ input[name="serendipity[filter][fileCategory]"] {
         background: transparent;
     }
 
-    #main_menu {
-        padding-bottom: 1.5em;
-    }
-
     .js #main_menu {
         position: relative;
     }
@@ -2090,32 +2085,42 @@ input[name="serendipity[filter][fileCategory]"] {
         max-height: none;
     }
 
-    #main_menu h3 {
-        display: block;
-        visibility: visible;
-    }
-
-    #main_menu li > ul > li {
-        float: none;
-        width: 100%;
-    }
-
     #main_menu a {
-        padding: 0;
-    }
-
-    #main_menu a,
-    #main_menu a:visited {
-        text-decoration: underline;
+        display: block;
+        padding: .125em 0;
     }
 
     #nav-toggle {
         display: none;
     }
 
+    #main_menu h3 {
+        background: #eee;
+        border-bottom: 1px solid #aaa;
+        display: block;
+        font-size: 1em;
+        margin: 0 -1em;
+        padding: .5em 1em;
+        visibility: visible;
+    }
+
+    #main_menu > ul {
+        margin-top: 1.5em;
+        margin-bottom: 1.5em;
+    }
+
     #main_menu > ul > li {
-        margin-left: 0;
-        margin-right: 0;
+        border: 1px solid #aaa;
+        -webkit-box-sizing: border-box;
+        -moz-box-sizing: border-box;
+        box-sizing: border-box;
+        margin: 0 0 1em;
+        padding: 0 1em;
+    }
+
+    #main_menu li > ul > li {
+        float: none;
+        width: 100%;
     }
 
     #edit_entry_timestamp,