customizing look of forms in CSS

Replies: 0

i have created two forms on my website, and modified the CSS to customize how they look. here is the custom CSS that I created:
.wpcf7-form {
background:#d3d3d3;
padding:10px;
margin-bottom:10px;
border-radius:7px;
}

how do i apply this custom CSS to ONLY the form in the sidebar of this page: http://www.skilledatlife.com/subscribe/

right now the custom CSS is applying to both forms on this page. how do i create different custom CSS for each form so that each form can have its own look?

Thank you very much.