:root{color-scheme:light dark;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}body{margin:0;min-height:100vh;display:flex;align-items:center;justify-content:center;background-color:#f8fafc;color:#0f172a}.shell{text-align:center}.status{font-size:1.25rem;color:#334155}