.register-card {
    width: min(100%, 680px);
}

.register-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

@media (max-width: 650px) {
    .register-grid {
        grid-template-columns: 1fr;
        gap: 21px;
    }

    .register-card {
        width: min(100%, 450px);
    }
}