mm on "[Plugin: Contact Form 7] Contact form 7: How to style "choose file" button?"

I need to specify a special path for form 2 as they don't have the same styles.

that's why i am supposed to add somewhere:

#wpcf7-f482-t1-o1 .wpcf7-form

not sure how to continue from there
the following didn't work:

#wpcf7-f482-t1-o1 .wpcf7-form
.wpcf7 .wpcf7-submit{
	width: 100px;
	height: 30px;
	background-color: #999999;
	font-size: 13px;
	color: #fff;
	border: 1px solid #fff;
	border-radius: 7px;
}