Learn CSS: Variables and Functions

Create websites viewable on devices of all sizes using responsive design techniques, such as relative sizing units and media queries.
Continue your CSS learning journey with Learn CSS: Responsive Design. As a website developer, it's your responsibility to ensure that your websites remain legible and visually appealing across a variety of devices. You can also increase the accessibility of your website by using responsive design techniques.


* Use relative sizing units

* Implement media queries

* Scale websites across devices


### Notes on Prerequisites
We recommend that you complete [Learn CSS: Transitions](https://www.codecademy.com/learn/learn-css-transitions) before completing this course.

• Variables and Functions: Learn how to use CSS variables and functions to create more organized, efficient, and dynamic websites.
• Lesson: CSS Variables
• Lesson: CSS Functions
• Project: Curious Ornithologist
• Quiz: Variables and Functions
• Informational: Next Steps