Help! Trying to build my navigation

Hi all,

Could anyone help me or point to the right tutorial so I can achieve the following navigation design?

I’m having trouble with the selected state as well just being the wonky green line.

Is that even possible?

Thanks!


Here is my site Read-Only: https://preview.webflow.com/preview/website-4bb32c-4d3e757d57ce8edf9b7eda56?utm_medium=preview_link&utm_source=dashboard&utm_content=website-4bb32c-4d3e757d57ce8edf9b7eda56&preview=44da2aea1d35b5152d2fa70d758fb3e3&mode=preview