:root{--bg:#f6f7f9;--card:#fff;--ink:#14181d;--muted:#5b6672;--line:#dde2e8;--accent:#0b4a8f;--danger:#a4222b}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--ink);margin:0;padding:0;font:16px/1.55 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:var(--accent)}.shell{max-width:960px;margin:0 auto;padding:24px 20px 64px}.narrow{max-width:420px;margin:8vh auto;padding:0 20px}.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:24px}h1{margin:0 0 4px;font-size:1.4rem}.sub{color:var(--muted);margin:0 0 20px;font-size:.94rem}label{margin:14px 0 5px;font-size:.88rem;font-weight:600;display:block}input[type=text],input[type=email],input[type=password]{border:1px solid var(--line);width:100%;color:var(--ink);background:#fff;border-radius:7px;padding:10px 12px;font-size:1rem}input:focus-visible{outline:2px solid var(--accent);outline-offset:1px}button{background:var(--accent);color:#fff;cursor:pointer;border:0;border-radius:7px;width:100%;margin-top:20px;padding:11px 16px;font-size:1rem;font-weight:600}button:disabled{opacity:.6;cursor:default}.error{color:var(--danger);background:#fdf3f4;border:1px solid #e8c3c6;border-radius:7px;margin-top:16px;padding:10px 12px;font-size:.92rem}.hint{color:var(--muted);margin-top:14px;font-size:.86rem}.code-input{letter-spacing:.4em;text-align:center;font-size:1.3rem}.qr{border:1px solid var(--line);border-radius:7px;width:190px;height:190px;margin:12px auto;display:block}.secret{word-break:break-all;color:var(--muted);text-align:center;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:.82rem}.topbar{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;margin-bottom:24px;padding:14px 0;display:flex}.topbar form button{width:auto;color:var(--muted);border:1px solid var(--line);background:0 0;margin:0;padding:7px 14px;font-size:.88rem}