CSS is not taking effect in PREVIEW but it does in the BUILDER

I used the following code to adjust the width of the reset button manually, because the text I used didn't fit:

.form-submit-reset {
    width : 120px;
}

When I'm in the editor, those CSS changes take and the button looks as I would expect.  If I load the form outside of the editor, those CSS changes don't show.

I have changed the CSS to:

.form-submit-reset {
  width : 120px !important;
}

The CSS is taking effect now.