Newsletter-sign-up-with-success-message-main

Hi there, I have a few suggestions that could improve the design.

1. The form is way too stretched, I would suggest using "rem" instead of percentage for the "max-width".
2. For the custom list image (the checkmarks), instead of targeting the "ul" with the "::before" pseudo-element, you can directly change the list style of the "ul" by using list-style-image: url(url to image).
3. There really is no need for using CSS Grid, all of this could be accomplished with Flexbox, it would make the code look way cleaner. You can accomplish this by separating the content (the text, form, button, etc.), and the image into two "container" divs and just display: flex them.

Not sure if the last point made sense, but hope it this helps.