Name field: How to reduce the width of the "First Name" and "Last Name" fields and display them inline?

how cani get the first and last name field smaller and on the same line?

Please inject this CSS in your form:

[data-type="control_fullname"] .form-sub-label-container {

    width: 45%;

}

Do let us know if it works.

thanks! how can i increase space between them?

Try with this code:

[data-type="control_fullname"]:nt-child(2) {

    margin-left:5%;

}

It will separate  the "last name" field from the "first name", replace the value with other one that you think that is needed.