:root{--bg:#f4f5f7;--card:#fff;--text:#1d2330;--muted:#667085;--border:#d0d5dd;--accent:#2457d6;--ok-bg:#e7f6ec;--ok-text:#146c2e;--info-bg:#eaf1fd;--info-text:#1d4ea8;--err-bg:#fdecec;--err-text:#a4161a;color:var(--text);font-family:system-ui,Segoe UI,sans-serif}body{background:var(--bg);margin:0;padding:40px 16px}.card{background:var(--card);border:1px solid var(--border);border-radius:10px;max-width:520px;margin:0 auto;padding:28px}h1{margin:0 0 20px;font-size:1.4rem}form{gap:14px;display:grid}label{gap:4px;font-size:.9rem;font-weight:600;display:grid}input{font:inherit;border:1px solid var(--border);border-radius:6px;padding:8px 10px;font-weight:400}input[readonly]{color:var(--muted);background:#f2f4f7}.device{grid-template-columns:1fr 1fr;gap:12px;display:grid}@media (width<=480px){.device{grid-template-columns:1fr}}.req{color:var(--err-text)}button{font:inherit;background:var(--accent);color:#fff;cursor:pointer;border:0;border-radius:6px;justify-self:start;padding:9px 16px}button:disabled{opacity:.55;cursor:default}.muted{color:var(--muted)}.alert{border-radius:6px;margin:16px 0 0;padding:12px 14px}.alert p{margin:0 0 8px}.alert p:last-child{margin-bottom:0}.confirm{margin-top:12px!important}.actions{gap:8px;display:flex}button.secondary{color:var(--info-text);background:0 0;border:1px solid}.hint{opacity:.85;font-size:.85rem}.success{background:var(--ok-bg);color:var(--ok-text)}.info{background:var(--info-bg);color:var(--info-text)}.error{background:var(--err-bg);color:var(--err-text)}dl{grid-template-columns:auto 1fr;gap:4px 12px;margin:0;display:grid}dt{font-weight:600}dd{word-break:break-word;margin:0}.mono{word-break:break-all;font-family:Consolas,Cascadia Mono,monospace;font-size:.85rem}