Hi now i understand

To do this you need to use a different approach otherwise it won't work.

You must remove inline styling from elements and use an external CSS, moreover not use 'px' but 'em' as unit of measure.
Using 'em' and the global 'font-size' in percentage assigned to the body tag the resize will keep ratio between the 3 different tags.

Of course you have to remove the custom font size selectors and use the global one only for the body tag.

Cheers,

John