how to add space between two columns in contact form 7

Question

I have made form in contact form 7, and i have used Column Shortcodes plugin that form should have two fields in one row, its worked but where do i add some space between two fields in one row I have tried this .wpcf7 p {margin-right:10px;} but it does not take effect

here is the link to site https://www.childrensdentalclinicjonesboro.com/admission/

I expect that the each fields should have little space between them, but its does not have

Answer 1

use this CSS for below result

.one_half { width: 47.5% !important;
margin-right: 2.5% !important;}