Update btn.css

Author: rickcomics

btn.css

@@ -21,10 +21,12 @@
 }
 
 .btn:hover {
+  margin: auto;
   background-color: rgba(255, 0, 0, 1);
 }
 
 .btn:active {
+  margin: auto;
   box-shadow:
     inset -2px -2px 3px rgba(255, 255, 255, 0.6),
     inset 2px 2px 3px rgba(0, 0, 0, 0.6);