button reset

src/styles/mouses.css

@@ -47,8 +47,8 @@
         left: 80px;
       }
       &.sound_3 {
-        top: 30px;
+        top: 40px;
-        left: 20px;
+        left: 30px;
       }
       &.sound_4 {
         top: -40px;

src/styles/reset.css

@@ -8,6 +8,12 @@ select {
   /* Remove built-in form typography styles */
   font: inherit;
 }
+button:focus,
+button:active {
+  outline: none;
+  box-shadow: none;
+  -webkit-tap-highlight-color: transparent;
+}
 body {
   -webkit-font-smoothing: antialiased;
 }