looks like captcha line is not working in quick css

Hello,
Looks like my quick css code is not working with the captcha on https://www.zorbas.dk/booking/

See post: https://kriesi.at/support/topic/change-the-captcha-note-please-prove-that-you-are-human-by-solving-the-equation/

In quick css i have have changed the post/id to 2584, so my code in css is:

}

.page-id-2584 #element_avia_17_1 {
width: 100%;
margin-left: 0;
}

But this doesnt work.
Do you perhaps know why?