Responsive design in 2026 isn’t optional — it’s the baseline for building anything on the web. In this video I walk through what responsive design actually looks like across desktop, tablet, and mobile, then I break down the core tools I use: media queries, breakpoints, and the classic max-width/min-width patterns. I show how to avoid overlap issues (yep, the “one pixel difference” tip), and I also cover mobile-first vs desktop-first. Mobile-first is great for mindset, but I’m old school — I still prefer desktop-first most of the time. From there, I move into more modern, less manual approaches: fluid design with flex-wrap + min-width, viewport units (vw/vh) for responsive sizing, and CSS Grid with auto-fill + minmax for layouts that adapt automatically. I also show how Tailwind handles responsiveness with mobile-first breakpoints (sm, md, lg, xl, 2xl), plus a no-code workflow in Wix Studio where you can collapse columns, control text behavior (wrap vs scale proportionally), and even generate responsive layouts with AI. Finally, I demo how to do responsive logic with custom CSS media queries and even JavaScript form-factor detection when you need more control.