Modern Web Design with HTML5, CSS3, and JavaScript - Mobile-first Responsive Design

The video tutorial covers the implementation of responsive design using media queries and CSS Grid. It explains how to set breakpoints for different screen sizes and adjust styles accordingly. The tutorial demonstrates designing a layout with CSS Grid, including setting template columns, rows, and areas. It also discusses adjusting the layout for various screen sizes and finalizing the design. The video concludes with a preview of the next lesson, focusing on vertical navigation bar adjustments.

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