diff --git a/index.html b/index.html
index 658c8dd..96ea052 100644
--- a/index.html
+++ b/index.html
@@ -122,10 +122,10 @@
                 text-shadow: 0.5vmin 0.5vmin 0 #a4f4b4; /* x y blur-radius colour */
             }
 
-            #setup div.centre {
-                text-align: center;
-                  margin-top: 0.2em; /* fallback */
-                  margin-top: 2vmin;
+            .centre {
+            	text-align: center;
+              	margin-top: 0.2em; /* fallback */
+              	margin-top: 2vmin;
             }
 
             input[type="radio"] {
@@ -850,7 +850,9 @@
                 more games coming soon... keep your eyes peeled... peace!
             </div>
 
-            <button>reset</button>
+            <div class="centre">
+	            <button>reset</button>
+	        </div>
         </div>
         <div id="setup">
             <h1>endless mines</h1>