How to Center a Form

.wpforms-container.wpf-center {

    margin: 0 auto !important;

    /* Adjust the width in the next 2 lines as your site needs */

    max-width: 500px !important;

    width: 500px !important;

}

/* Readjust the form width for smaller devices */

@media only screen and (max-width: 600px) {

    .wpforms-container.wpf-center {

        /* Reset the width for devices under 600px */

        max-width: unset !important;

        width: auto !important;

    }

}