Over 60% of global web traffic now comes from mobile devices. Yet most websites are still designed on a desktop monitor and then squeezed down to fit smaller screens. That approach is backwards, and it shows. What Mobile-First Actually Means Mobile-first design is not "make it responsive." It means you start the design process with the smallest screen and work your way up. Every layout decision, every interaction, every piece of content is first validated on a 375px viewport before it ever touches a desktop breakpoint. This forces a discipline that desktop-first design does not. When you have 375 pixels of width, you cannot hide behind a 12-column grid and spacious whitespace. Every element has to earn its place. Why Desktop-First Fails Content overload Desktop designs tend to pack too much onto a single screen. Navigation menus with 15 items, sidebars with widgets, hero sections with three CTAs.…