.payment-return-actions {
    flex-direction: column;
    text-align: center;
}

.payment-return-actions > p {
    max-width: 640px;
    line-height: 1.6;
}

.payment-return-actions > .btn-primary,
.payment-return-actions > .btn-outline {
    width: 100%;
    max-width: 460px;
}