id/styles/login_form.css

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;

    max-width: 600px;
    margin: auto;
}

.login-form > * {
    margin: 0;
}

.login-form > *[type=submit] {
    margin: 0 auto;
}

.passkey {
    max-width: 600px;
    margin: auto;
}