#captcha div, #rc-imageselect {
    -webkit-transform: scale(0.80);
    -moz-transform:    scale(0.80);
    -ms-transform:     scale(0.80);
    -o-transform:      scale(0.80);
    transform:         scale(0.80);

    -webkit-transform-origin: 0 0;
    -moz-transform-origin: 0 0;
    -ms-transform-origin: 0 0;
    -o-transform-origin: 0 0;
    transform-origin: 0 0;
}

@media (max-width: 640px){ #captcha div, #rc-imageselect {
    margin: 0;
}}