:root{--bg:#f3f4f6;--surface:#ffffff;--border:#e5e7eb;--text:#1e293b;--text-muted:#6b7280;--accent:#6366f1;color-scheme:light}@media(prefers-color-scheme:dark){:root{--bg:#0d0f13;--surface:#171a21;--border:#2a2f3a;--text:#e5e7eb;--text-muted:#8b94a3;--accent:#818cf8;color-scheme:dark}}*{box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,segoe ui,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);margin:0;padding:2rem 1rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.5rem 2rem;max-width:42rem;margin:0 auto}.back{display:inline-block;margin-bottom:1rem;font-size:.85rem;color:var(--text-muted);text-decoration:none}.back:hover{color:var(--accent)}h1{font-size:1.3rem;margin:0 0 1rem}p{font-size:.92rem;line-height:1.6;color:var(--text-muted);margin:0 0 .9rem}strong{color:var(--text)}.app-footer-disclaimer{max-width:42rem;margin:1rem auto 0;font-size:.7rem;line-height:1.4;color:var(--text-muted);opacity:.8;text-align:center}