Jekyll Bootstrap 4
Custom variables are located in css/custom/_variables.scss. This includes primary color and other configuration items. /custom/_variables is imported in the bootstrap.scss file.
bootstrap/bootstrap.scss is inpoured into /css/main.scss scss directory is _css
Main html layout is wrapper.html. This contains the header.html header.html and footer.html are _includes header.html contains the navbar /index.html is the home page, uses wrapper.html as layout and banner.html