.b-actions {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.b-actions input[type="submit"] + a {
    margin-top: 1rem;
}

@media all and (min-width: 768px) {

    .b-actions {
        flex-direction: row;
        justify-content: flex-start;
    }

    .b-actions input[type="submit"] + a {
        margin: 0 0 0 1rem;
    }

}