how to make navigation menu same text - brooklyn theme

[7kingodmsla]

my store 

example store 

[7kingodmsla]

also how to add padding to navigation underline 

[7kingodmsla]

I HAVE FIXED THE TEXT HOWEVER THERE IS TWO LINES SHOWING , THE HIGHLIGHTED NAVIGATION TEXT AND AN ADDITIONAL LINE . HOW DO I REMOVE THIS LINE MY STORE

EXAMPLE STORE 

[7kingodmsla]

ALSO I WOULD LIKE TO INCREASE PADDING BETWEEN  text decoration underline and navigation link