--- a/css/common.css	Sun Nov 20 20:56:23 2016 +0200
+++ b/css/common.css	Mon Nov 21 03:31:01 2016 +0200
@@ -9,23 +9,20 @@
 .c_special div { background: #a06; }
 .c_all div { background: #0af; }
 
-#controls span {
+#controls a {
 	border: 1px solid black;
 	margin: 0.15em;
 	display: inline-table;
 	border-radius: 0.2em;
-}
-
-#controls span a {
 	text-decoration: none;
 	color: black;
-	margin: 1em;
+	padding: 0.30em;
 }
 
 #controls div {
 	padding-bottom: 1em;
 }
 
-#controls span.visible { background: white; }
-#controls span.hidden { background: red; }
+#controls a.visible { background: white; }
+#controls a.hidden { background: red; }