# Responsive Design

Pages that work from a phone to a wide screen: the viewport, media queries and breakpoints, mobile first, responsive images, math in CSS with calc(), min(),…

Updated: November 10, 2026

## Chapters

- [Mobile First and Media Queries](https://www.ask-codey.com/courses/css-in-depth/chapters/css-mobile-first-and-media-queries) (3 topics, 5 lessons)
- [Fluid and Container-Based Layouts](https://www.ask-codey.com/courses/css-in-depth/chapters/css-fluid-and-container-layouts) (3 topics, 4 lessons)

Source: https://www.ask-codey.com/courses/css-in-depth/modules/4