.recaptcha-holder:empty {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 360px;
}

.recaptcha-holder:empty::before {
    content: "";
    width: 28px;
    height: 28px;
    border: 3px solid #ddd;
    border-top-color: #555;
    border-radius: 50%;
    animation: recaptcha-spinner 0.8s linear infinite;
}

.header-form_btn:disabled,
.recaptcha-holder:empty + .header-form_btn {
    background: #aaa;
    border-color: #aaa;
    color: #fff;
    cursor: not-allowed;
    pointer-events: none;
    opacity: 0.7;
}

@keyframes recaptcha-spinner {
    to {
        transform: rotate(360deg);
    }
}