#checkdigit-section {
    display: flex;
    justify-content: center;
}

#checkdigit-form {
    min-width: 50%;
    display: grid;
    gap: 15px;
    grid-template-columns: 1fr 1fr 1fr;
}

#checkdigit-flash-message, #input-val {
    grid-column: 1 / 4;
}