Contact Form 7 Editing

Hi,

I’ve installed the contact form 7 plugin on my site but have come across one small ‘issue’ that I wonder if someone could help me with?

The input field for ‘Your Message’ has a draggable element to re-size the box which i’d like to get rid of, but I can’t find the property I need to adjust in css. I’ve set all the elements according to the site instructions, but the box is still re-sizable. What am I missing?

.wpcf7 input[type=”text”],
.wpcf7 input[type=”email”],
.wpcf7 textarea
{
width: 100%;
height: auto;
}

Thanks.