Knowing one can change the typeface and font size for Qt apps in their settings file, i.e. I set Krunner so it shows with a bigger font than default with the following in ~/.config/krunnerrc:

[General]
...stuff...
font=An Awesome Typeface,16,-1,5,25,0,0,0,0,0,Regular

But this happens to change the typeface for all texts used within Krunner, so it ends looking like in the first example of the image.

Which is fine, but I’d want the text input in the font to be bold. So trying

font=An Awesome Typeface,16,-1,5,25,0,0,0,0,0,Bold

Gives the result shown in the second example.

Is there any way to make it so only the text input has a bold font, like in the third example?