Builder Mobile and Real Mobile View Different

That builder preview lies all the time. It just shrinks the screen, but it ignores real mobile browser quirks. Never trust the preview. Test on an actual phone every time. First, clear your mobile cache and reload. Then check your text blocks. In my experience, fixed pixel widths or absolute positioning break on phone screens almost instantly. Swap those to auto or relative. Also, adjust your margins directly inside the mobile view, not the desktop view. One quick tip: open the page in a private tab on your phone. If an old CSS file is cached, you'll waste an hour fixing something that isn't even broken.