div.h-captcha div {
    margin: 1em auto;
}

#admincenter #hcaptcha_public_key, #admincenter #hcaptcha_private_key {
    width: 75%;
    max-width: 50ex;
}

.h-captcha, iframe[src*="hcaptcha.com"] {
    margin-bottom: 10px !important;
}