Essential techniques for building websites that look great on every device. Covers CSS Grid, Flexbox, media queries, and modern responsive patterns.
By RiseTop Team · May 2026 · 8 min read
With over 55% of web traffic from mobile devices, responsive design is essential. Modern responsive design uses flexible layouts, container queries, and intrinsic design principles.
The Mobile-First Approach
Start with the mobile layout and progressively enhance for larger screens. This ensures the mobile experience is not an afterthought.
Essential Techniques
Flexible grids: Use CSS Grid and Flexbox instead of fixed widths
Fluid typography: Use clamp() for font sizes
Responsive images: Use srcset and sizes attributes
Container queries: Style elements based on container size
Relative units: Use rem, em, and vw/vh instead of px
CSS Grid for Page Layouts
CSS Grid is the modern standard for page layouts. Use it for overall structure and Flexbox for component-level layouts within sections.
Frequently Asked Questions
What breakpoints should I use? +
Common breakpoints: 480px for mobile, 768px for tablet, 1024px for laptop, 1280px for desktop. With modern CSS you often need fewer breakpoints thanks to Grid and Flexbox.
Are container queries ready for production? +
Yes. Container queries are supported in all modern browsers including Chrome 105+, Safari 16+, and Firefox 110+.
How do I test responsive designs? +
Use browser DevTools device emulation, test on real devices, and validate with Google Mobile-Friendly Test.