:root{--ink:#14202e;--muted:#5b6876;--line:#e3e7ec;--bg:#f6f7f9;--brand:#16324f;--accent:#2f6f9f;--card:#fff}
*{box-sizing:border-box}html,body{margin:0}
body{font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg)}
.top{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;max-width:880px;margin:0 auto}
.brand{display:flex;gap:10px;align-items:center;font-weight:600;letter-spacing:.02em}
.mark{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:8px;background:var(--brand);color:#fff;font:600 14px Georgia,serif}
.lang button{border:1px solid var(--line);background:#fff;padding:6px 10px;cursor:pointer;font-weight:600;color:var(--muted)}
.lang button:first-child{border-radius:6px 0 0 6px}.lang button:last-child{border-radius:0 6px 6px 0;border-left:0}
.lang button.on{background:var(--brand);color:#fff;border-color:var(--brand)}
main{max-width:880px;margin:0 auto;padding:0 20px 24px}
.hero{padding:18px 0 8px}.hero h1{font:600 clamp(26px,4.5vw,38px)/1.15 Georgia,"Times New Roman",serif;margin:0 0 6px;color:var(--brand)}
.title{margin:0 0 10px;color:var(--accent);font-weight:600}.intro{margin:0;color:var(--muted);max-width:720px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;margin-top:18px;box-shadow:0 1px 2px rgba(20,32,46,.04)}
.log{min-height:120px;max-height:52vh;overflow:auto;display:flex;flex-direction:column;gap:10px}
.msg{padding:10px 14px;border-radius:12px;max-width:88%;white-space:pre-wrap;word-wrap:break-word}
.msg.user{align-self:flex-end;background:var(--brand);color:#fff;border-bottom-right-radius:4px}
.msg.bot{align-self:flex-start;background:#eef2f6;border-bottom-left-radius:4px}
.msg.bot a{color:var(--accent)}.msg.wait{color:var(--muted);font-style:italic}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.chips button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 12px;cursor:pointer;color:var(--ink);font-size:14px}
.chips button:hover{border-color:var(--accent);color:var(--accent)}
.ask{display:flex;gap:8px}.ask textarea{flex:1;resize:none;border:1px solid var(--line);border-radius:10px;padding:11px 12px;font:inherit;max-height:140px}
button[type=submit],.btn{background:var(--brand);color:#fff;border:0;border-radius:10px;padding:11px 18px;font:600 15px system-ui,sans-serif;cursor:pointer;text-decoration:none;text-align:center}
button[disabled]{opacity:.6;cursor:wait}.btn.alt{background:#1f7a55}
.note,.muted{color:var(--muted);font-size:13px}.note{margin:10px 0 0}
.meet h2{margin:0 0 4px;font:600 21px Georgia,serif;color:var(--brand)}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}.wide{grid-column:1/-1}
label span{display:block;font-size:13px;font-weight:600;margin-bottom:4px;color:var(--muted)}
input,select,.grid textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:9px 10px;font:inherit;background:#fff}
.out{margin-top:14px;padding:12px;border-radius:10px;background:#f1f6fa}.actions{display:flex;gap:10px;flex-wrap:wrap}
footer{max-width:880px;margin:0 auto;padding:10px 20px 32px;display:flex;flex-wrap:wrap;gap:16px;font-size:14px}
footer a{color:var(--muted);text-decoration:none}footer a:hover{color:var(--accent)}
@media (max-width:600px){.grid{grid-template-columns:1fr}.msg{max-width:94%}.card{padding:14px}.top{padding:12px 16px}main{padding:0 14px 20px}}

body.embed{background:#fff;font-size:15px}
.embed .top{padding:10px 14px;max-width:none;border-bottom:1px solid var(--line)}
.embed .lang{display:none}
.embed main{max-width:none;padding:0 12px 14px}
.embed .card{border:0;box-shadow:none;padding:10px 2px;margin-top:4px}
.embed .meet{border-top:1px solid var(--line);border-radius:0}
.embed .log{max-height:none;min-height:180px}
.embed .grid{grid-template-columns:1fr}
.embed .top{display:none}