shopify forms popup button help

[Afflucart]

Hello guys so, some one posted this question over here on 03-03-2025 but did not get any working answer. I will post a link  to that post here. I am now encountering the same issue on my shop where i installed forms to create my pop-up, but no matter what CSS code i put in there or inject into the java script it still does not seem to work. The yellow 10% discount yellow button is what i wan tot target. The other code that the other person gave does not work, this is the code they gave  : 

If anyone knows how to edit this button layout i will be very grateful thanks!

[Afflucart]

this is the code they gave :

.shopify-form-teaser {
background-color: #f0f0f0; /* Replace with your desired background color */
color: #333; /* Replace with your desired text color */
border: 1px solid #ccc; /* Adjust border color as needed */
padding: 10px; /* Adjust padding for spacing */
font-size: 14px; /* Adjust font size as needed */
}