In some browsers or for some users, the browser’s focus feature gets triggered when clicking on something. This does not happen for everyone, but it would be good to add this.
You can add it at the very end of your style.css code.
/* remove outline */
* {
outline: none !important;
}
*:focus {
outline: none !important;
box-shadow: none !important;
}
/* remove outline final code */
