tag giving different font size
Applying an enlarged font-size using em
directly to a tag and to the nested
tag are giving different results.>
"The em unit is a relative unit based on the computed value of the font size of the parent element. This means that child elements are always dependent on their parent to set their font-size."
Reference: CSS-Tricks
Your tag has already 1,4 of normal size and
is 1,7 of its parent (which is already enlarged).