In main.css, add properties for the .hero class selector that change the font-family to 'Trebuchet MS', with fallbacks of Helvetica and sans-serif. You can use the code below as a guide:
font-family: 'Trebuchet MS', Helvetica, sans-serif;
I've added the code.
This is the message I receive:
Did you add a font-family of "Trebuchet MS" with Helvetica and sans-serif as fallbacks?
I can not advance via the Next button.
Replace this line with your code.