A Design System can save you time when you code a website, and help the pages feel more consistent. This course is taught by the King of CSS, Kevin Powell. (And yes, if you google "king of CSS", Kevin will be the top result.) You'll learn a ton of advanced CSS and UI design concepts. (7 hour YouTube course): 

https://www.freecodecamp.org/news/how-to-create-and-implement-a-design-system-with-css/ 

In this video, Tech with Tim is  going to be showing you how to make a website with Python, covering Flask, authentication, databases, and more. The goal of this video is to give you what you need to make a finished product that you can tweak, and turn into anything you like. We're going to also go over how you create a new user's account, how you store those in a database, how to log into those user accounts, how to log out of them, and how you associate that information with a specific user. 

Learn the Flask Python web framework by building your own e-commerce website with its own authentication system.