How to remove underline from element

[undercoverfresh]

I’m looking to remove the underline from size guide for mobile and desktop on dawn theme 

url knmb1c-pf.myshopify.com

password samurai 

[topnewyork · Accepted solution]

Hi @undercoverfresh 
1. Go to Online Store -> Theme -> Edit code.
2. Open your theme.liquid file
3. In theme.liquid, paste the below code before </head>

<style>
button#ProductPopup-popup_3R9ppt {
    text-decoration: none !important;
}
</style>

If my reply is helpful, kindly click like and mark it as an accepted solution.
Thanks!