I am using styling to highlight the contents of an input field depending upon which field is "in use". The text is put into bold and colored red.
In Internet Explorer and Safari, this effect is working as intended. However, in Firefox, the addition of the style caused the input field size to get larger. See the image for a clear example.
Again, in both IE and Safari, the styling does not change the size of the input field.
What styling would I use to compensate for this in Firefox?