Responsive web design uses flexible grids, flexible images, and CSS media queries to adapt a single website to any screen size. One URL, one codebase, every device.
A separate mobile site (m.example.com) requires duplicate content, separate maintenance, and splits your SEO signals. Google recommends responsive design as the best practice � it is simpler, faster to maintain, and keeps all link equity on one URL.
Responsive design uses the same HTML and CSS across all devices. Media queries apply different styles at different screen widths. No redirects, no device detection, no maintenance overhead.
Fluid grids � Use relative units (%, rem, vw, fr) instead of fixed pixel widths. A two-column layout on desktop becomes a single column on mobile.
Flexible images � Images scale within their containers using max-width: 100%. Different image sizes are served at different breakpoints using srcset.
Media queries � CSS breakpoints at common screen widths (typically 480px, 768px, 1024px) adjust typography, layout, and navigation. Build mobile-first: start with the mobile layout and add complexity at larger screens.
Fixed-width containers that overflow the screen. Tables that force horizontal scrolling. Navigation menus that do not collapse on small screens. Videos embedded with fixed dimensions. These are flagged in every site audit.
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