Flexbox - The animated tutorial is a visual guide with animation on flexbox layout options.
You may also be interested in ...
CSS Layout Generator
Create flexible and responsive designs in no time using these CSS grid and flexbox-based templates.
Open Props
Open source CSS custom properties to help accelerate adaptive and consistent design. Available from a CDN or NPM, as CSS or JavaScript.
Styling Basic Dropdown Elements with Tailwind CSS
Learn how to style a dropdown menu with Tailwind's utility classes.