Button on homepage of my website won't scale on mobile WORDPRESS-CodePudding

I am using Wordpress- I am in the block editor using Custom CSS.

I have one button on my homepage that won't scale on mobile no matter what I try- The text inside of it gets wonky too. I've tried this:

@media only screen and (min-width: 320px) and (max-width: 480px){
        #wp-block-themeisle-blocks-button-6a531a90 {
        min-width: 50%;
  }
}

It's the 'Free Valuation' button Here's a link to my website

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