@media (max-width: 768px) {
.g-recaptcha {
        -webkit-transform: scale(0.75);           
        -moz-transform: scale(0.75);           
        -o-transform: scale(0.75);                
        transform: scale(0.75);

    -webkit-transform-origin: left top;
    -moz-transform-origin: left top;
    -o-transform-origin: left top;
    transform-origin: left top;
}
}