Responsive Web Design Fundamentals
What You'll Build
- Fluid grid system using CSS Grid and Flexbox
- Mobile-first navigation with accessible hamburger menu
- Responsive image gallery with lazy loading
- Typography system that scales across viewports
- Contact form with touch-optimized inputs
Course Structure
Weeks 1-2: Foundation
Understanding viewport, relative units, and mobile-first thinking. Build your first fully responsive page.
Weeks 3-4: Layout Patterns
Grid systems, common UI patterns, navigation solutions. Handle real-world layout challenges.
Weeks 5-6: Images & Performance
Responsive images with srcset and picture elements. Optimize for speed without sacrificing quality.
Weeks 7-8: Testing & Refinement
Cross-device testing strategies, debugging tools, accessibility checks. Polish three complete projects.
Most websites get around 60% of their traffic from mobile devices, yet many developers still design desktop-first and bolt on mobile support later. This causes real problems—slow load times, broken layouts, frustrated users.
You'll learn the mechanics of responsive design: fluid grids, flexible images, media queries that actually make sense. We cover viewport units, breakpoint strategies, and how to handle images without killing mobile data plans.
The course walks through building three different layouts from scratch. You'll see why max-width matters more than width, how to use CSS Grid and Flexbox together, and when to reach for container queries instead of media queries.
We spend time on performance too—lazy loading images, optimizing web fonts, and reducing layout shifts. By the end, you'll understand how to test across devices without owning twenty phones.