Topcoder navigation prototype Demo URL https://tc-unified-nav.herokuapp.com/ Design https://marvelapp.com/89423f8 https://marvelapp.com/1dgiejg6 Install gulp dependencies npm install -g gulp npm i Build scss gulp styles Build and watch scss(auto build css after save file) gulp Theme Theme is in sass/_global/_themes.scss Run web npm start Then open http://localhost:3000/dark for dark theme in browser Then open http://localhost:3000/light for light theme in browser