HTML classes and ids are case sensitive.
-
the id is
features
but in the nav-link you wroteFeatures
-
the id is
how-it-works
but in the nav-link you wroteHow-it-work
-
the id is
pricing
but in the nav-link you wrotePricing
HTML classes and ids are case sensitive.
the id is features
but in the nav-link you wrote Features
the id is how-it-works
but in the nav-link you wrote How-it-work
the id is pricing
but in the nav-link you wrote Pricing