How to remove gray highlight when I click on buttons for MOBILE version

[clayinfo]

Hi, how do you remove the gray highlight that it does for a split-second when you click on buttons for mobie
 www.constructionlayers.com

PW: CollectionThree

  

[villalobos1]

Please go to Online Store > Themes > click 3 dots button > Edit code > Theme.liquid and add code above the </body> tag on the file Theme.liquid.

<style>
summary[role="button"], button, .footer__blocks-wrapper .footer-block, a {
-webkit-tap-highlight-color: rgba(0,0,0,0);
}
</style>