*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.45;color:#0f172a;background:#f8fafc}a{color:#0369a1}.shell{max-width:40rem;margin:0 auto;padding:2rem 1.25rem}.card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:1.5rem;margin-bottom:1rem;box-shadow:0 1px 3px #0f172a0f}input[type=email],input[type=text]{width:100%;padding:.5rem .65rem;border:1px solid #cbd5e1;border-radius:8px;font-size:1rem}button,.btn{display:inline-block;padding:.55rem 1rem;font-size:.95rem;font-weight:600;border-radius:8px;border:none;cursor:pointer;background:#0ea5e9;color:#fff;text-decoration:none;text-align:center}button:disabled{opacity:.55;cursor:not-allowed}.btn-secondary{background:#fff;color:#0f172a;border:1px solid #cbd5e1}.muted{color:#64748b;font-size:.9rem}.error{color:#b91c1c;font-size:.9rem}.row{display:flex;gap:.75rem;flex-wrap:wrap;align-items:center}.stack{display:flex;flex-direction:column;gap:.75rem}