Trouble styling a specific field

We wanted the majority of our fields to be displayed stacked vertically, so we added the following code to our style sheet:

span.wpcf7-list-item { display: block; }

However, there are a few fields that we to have displayed vertically. For example, we have a survey question where we want to have the visitors rate their experience on a level of 0-10, so we want all the radio buttons for the choices to all be displayed inline instead of blocked.

We added a unique style:

#horiz-input {display: inline;}

and referenced it in our form tag

[radio your-referral id:horiz-input use_label_element “0” “1” “2” “3” “4” “5” “6” “7” “8” “9” “10”]

but this is not working.

What are we doing wrong?

https://wordpress.org/plugins/contact-form-7/