:root{color-scheme:light;font-family:system-ui,-apple-system,Segoe UI,sans-serif}body{margin:0;background:#f7f9fc;color:#0d1b2a}.portal-shell{max-width:720px;margin:0 auto;padding:3rem 1.5rem}.portal-shell h1{margin-bottom:.25rem}.portal-shell .tagline{color:#4a5b70;margin-top:0;font-style:italic}