Here’s my suggestion
Select one of the
Nav Item elements then in the Styles panel open the “states” dropdown and choose hover.
Next to the Class Name you will see the Hover state. Now change the weight of the font to bold and give the background a color.
Go back to the states dropdown and choose none. Now in the styles panel go down to transitions and add one for the background color.
Now to remove the jumpiness as the buttons adjust to a hovered button being wider, you could add a fixed width to the buttons.
This is the result.
The buttons don’t jump around anymore, but there is a shift in the button title. This is due to the chosen font as the letter spacing is different for the font weights. If you don’t like this, try a different font.
Another option on the buttons would be to use flexbox instead of fixed width. You can learn about that here.
Hope this all helps. Happy designing!