Overriding CSS to prevent links from printing when printing form

Question

I have a CF5 form that displays a table with many links to other form pages. I added a print button, but when the form prints all the links print in parentheses. I found the CSS in my template (Protostar) that needs to be overridden to avoid this, and am trying to do the override using a Load CSS action in my Load Form event, but it doesn't fix the printing problem. The code in my Load CSS is:

@media print {
  a[href]:after {
    content: " " !important;
  }
}

Am I misunderstanding how to use the Load CSS, or is there a problem with the code?
Thanks,
Nancy

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Overriding CSS to prevent links from printing when printing form