iframe {
    border-radius: 15px;
    border: 1px solid var(--bs-secondary-bg);
    width: 300px;
    height: 76px;
}

/* Light Theme */
[data-bs-theme="light"] .g-recaptcha {
    filter: none; /* Default appearance for light theme */
}

/* Dark Theme */
[data-bs-theme="dark"] .g-recaptcha {
    filter: invert(1) hue-rotate(180deg)           /* your existing flip   */
            brightness(1.25) contrast(0.85);      /* ↓ lift black / soften */
}