*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;height:100%}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#f3f4f6;color:#111827}a{color:#2563eb;text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit}.page-shell{max-width:1200px;margin:0 auto;padding:1.5rem}