How to insert background color, font type and color, etc in embed code?

I have the following checkout code to insert on a Webflow block. How can I set style, colors, fonts, etc of the displayed code?

<script src="https://cdn.chec.io/js/embed.js"></script>
<a href="https://checkout.chec.io/icqo4Y" data-chec-product-id="icqo4Y">Buy Now</a>

Sorry, I'm not a programmer or developer and can't find out any easy for me how to guide.

My goal is to have a button with following characteristics:

background color: #d36868
Font: Monserrat 20 px
Shape: Square
Text: Buy

Solution

Like this?

[data-chec-product-id] {
  display: inline-block;
  background-color: #d36868;
  font-family: 'Montserrat', sans-serif;
  font-weight: 100;
  font-size: 20px;
  text-decoration: none;
  border: 1px outset blue;
  height: 25px;
  width: 50px;
  text-align: center;
}

[data-chec-product-id]:hover {
  background-color: blue;
  color: white;
}

<script src="https://cdn.chec.io/js/embed.js"></script>
<a href="https://checkout.chec.io/icqo4Y" data-chec-product-id="icqo4Y">Buy</a>