/* custom.css – only a few tweaks, everything else is Bootstrap */
body {
    background-color: #f8f9fa;   /* light gray */
}
.navbar-brand {
    font-weight: 600;
    font-size: 1.5rem;
    cursor: pointer;
}
.captcha-card {
    max-width: 460px;
    margin: 2rem auto;
}
.error-msg {
    color: #dc3545;   /* Bootstrap danger colour */
}