Responsive design ensures websites look great on all devices.
1. Fluid Grids
Use relative units like percentages instead of pixels.
2. Flexible Images
Images scale according to container width.
3. Media Queries
@media (max-width: 768px) {
body { font-size: 14px; }
}
Conclusion
Responsive design improves accessibility and UX across devices.

Media queries saved me so much time. Excellent tips!