This landing page is a clone of the TemplateMo design for a Leadership Event. It has been built using Bootstrap 5 and SCSS, following the 7-1 pattern for a manageable code base. If you're not familiar with the 7-1 pattern, you can learn more about it on OpenClassromBLog.
In terms of naming convention, I've used the BEM (Block Element Modifier) approach. For those who aren't familiar with it, you can read a helpful blog post about using BEM and SCSS on PullrequestBlog.