Make Responsive Bootstrap Columns in Drupal 8.x Views Grid Layout
A trick to make Drupal 8.x Views Grid layout columns become responsive using Bootstrap. This allows for fewer columns per row on narrower viewports.
How To Customize Your Error Pages: A Beginner Web Dev Project (Part 1: Back-End Basics)
PART 1: Back-End Basics. Tutorial: Rebrand your error pages, learn intro web dev, make your first live app (Redo all your customized error pages using one page of code).
Cover: HTML, CSS, Accessibility, Responsive Design (with Media Breakpoints), and Refactoring.