Moving Captcha box

Hi there,

My Captcha box is sitting behind the ‘Register’ button on my site so it doesn’t look great, but more importantly some customers (depending on browser/device) are having trouble creating an account as they can’t click the tick box.

I can’t for the life of me find where works to edit/add CSS to move the Captcha box to sit either above or below the ‘register’ button to fix this.

Thanks in advance!

The page I need help with: [log in to see the link]