:root{--navy:#0a1f44;--navy-deep:#061633;--navy-soft:#142b5e;--gold:#c8a96a;--gold-light:#e3c895;
  --bg:#f4f6fb;--panel:#fff;--text:#1c2332;--muted:#5b6478;--border:#e1e6ef}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,Segoe UI,Inter,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.55}
a{color:var(--navy);text-decoration:none}a:hover{color:var(--gold)}
h1,h2,h3{color:var(--navy);margin:0 0 .5em}
.container{max-width:1080px;margin:0 auto;padding:0 24px}
header.appbar{background:var(--navy-deep);color:#fff}
.appbar .container{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{color:#fff;font-weight:700;display:flex;gap:10px;align-items:center}
.brand .mark{width:30px;height:30px;background:var(--navy);color:var(--gold);border-radius:7px;display:grid;place-items:center;font-weight:800;box-shadow:inset 0 0 0 1px var(--gold)}
.brand small{color:var(--gold-light);font-weight:500;font-size:.7rem;letter-spacing:.18em;text-transform:uppercase}
.appbar nav a{color:#cdd5e6;margin-left:18px;font-size:.92rem}.appbar nav a:hover{color:var(--gold-light)}
main{padding:28px 0 60px}
.layout{display:grid;grid-template-columns:1fr 320px;gap:24px}
.panel{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:18px 22px;margin-bottom:18px}
.chat{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:18px;display:flex;flex-direction:column;height:calc(100vh - 200px);min-height:520px}
.chat .messages{flex:1;overflow-y:auto;padding:6px 4px;display:flex;flex-direction:column;gap:12px}
.msg{max-width:78%;padding:10px 14px;border-radius:14px;font-size:.93rem;white-space:pre-wrap;word-wrap:break-word}
.msg.bot{background:#eef1f7;color:var(--text);border-top-left-radius:4px;align-self:flex-start}
.msg.user{background:var(--navy);color:#fff;border-top-right-radius:4px;align-self:flex-end}
.msg pre{background:#0d1b3a;color:#cdd5e6;padding:12px;border-radius:8px;overflow:auto;font:12px ui-monospace,monospace;margin:8px 0 0}
.tool{margin-top:8px;background:#fff7e0;border:1px solid var(--gold);color:var(--navy-deep);padding:8px 10px;border-radius:8px;font:12px ui-monospace,monospace}
.input{display:flex;gap:8px;margin-top:14px;border-top:1px solid var(--border);padding-top:14px}
.input input{flex:1;padding:12px 14px;border:1px solid var(--border);border-radius:9px;font:inherit}
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 18px;border-radius:8px;background:var(--gold);color:var(--navy-deep);font-weight:700;border:0;cursor:pointer}
.muted{color:var(--muted)}.tag{padding:1px 8px;border-radius:999px;font-size:.7rem;font-weight:700;background:#e0ecff;color:#1d3a7a}
@media(max-width:880px){.layout{grid-template-columns:1fr}}
pre.code{background:#0d1b3a;color:#cdd5e6;padding:12px;border-radius:8px;overflow:auto;font:12px ui-monospace,monospace}