:root{--bg:#faf7f4;--surface:#ffffff;--text:#1f1a17;--muted:#7a6f68;--border:#ece5df;--accent:#e8553d;--accent-soft:#fdebe7;--user:#1f1a17;--user-text:#fff}@media (prefers-color-scheme:dark){:root{--bg:#161312;--surface:#201c1a;--text:#f3ede9;--muted:#a3978f;--border:#322b28;--accent:#ff6a50;--accent-soft:#3a221d;--user:#f3ede9;--user-text:#161312}}*{box-sizing:border-box}body,html{margin:0;height:100%;background:var(--bg);color:var(--text);font:16px/1.55 ui-sans-serif,-apple-system,Segoe UI,Roboto,sans-serif}a{color:var(--accent)}button{font:inherit;cursor:pointer}.shell{max-width:780px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column;padding:0 16px}.top{justify-content:space-between;padding:18px 0;border-bottom:1px solid var(--border)}.brand,.top{display:flex;align-items:center}.brand{gap:10px;font-weight:700;font-size:19px;letter-spacing:-.01em}.brand img{width:30px;height:30px}.top a{color:var(--muted);font-size:14px;text-decoration:none}.thread{flex:1 1;padding:24px 0 140px;display:flex;flex-direction:column;gap:18px}.empty{margin:8vh auto 0;text-align:center;max-width:520px}.empty h1{font-size:30px;margin:0 0 6px;letter-spacing:-.02em}.empty p{color:var(--muted);margin:0 0 22px}.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.chip{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:999px;padding:8px 14px;font-size:14px}.chip:hover{border-color:var(--accent)}.msg{max-width:100%}.msg.user{align-self:flex-end;background:var(--user);color:var(--user-text);padding:10px 16px;border-radius:18px 18px 4px 18px;max-width:85%;white-space:pre-wrap}.msg.bot{background:var(--surface);border:1px solid var(--border);border-radius:4px 18px 18px 18px;padding:14px 18px}.msg.bot p:first-child{margin-top:0}.msg.bot p:last-child{margin-bottom:0}.msg.bot pre{overflow-x:auto;background:var(--bg);padding:10px;border-radius:8px}.msg.bot table{border-collapse:collapse}.msg.bot td,.msg.bot th{border:1px solid var(--border);padding:4px 8px}.typing{color:var(--muted);font-style:italic}.sources{margin-top:12px;padding-top:10px;border-top:1px dashed var(--border);display:flex;flex-wrap:wrap;gap:6px;font-size:13px}.src{background:var(--accent-soft);color:var(--text);border-radius:6px;padding:3px 8px}.src b{color:var(--accent);margin-right:4px}.flagrow{margin-top:10px;display:flex;gap:10px;align-items:center}.flagrow,.flagrow button{font-size:13px;color:var(--muted)}.flagrow button{background:none;border:1px solid var(--border);border-radius:999px;padding:3px 10px}.flagrow button:hover{color:var(--accent);border-color:var(--accent)}.composer{position:fixed;left:0;right:0;bottom:0;background:linear-gradient(transparent,var(--bg) 30%);padding:24px 16px 18px}.composer form{max-width:780px;margin:0 auto;display:flex;gap:8px;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:8px;box-shadow:0 6px 24px rgba(0,0,0,.06)}.composer textarea{flex:1 1;border:0;outline:0;resize:none;background:transparent;color:var(--text);font:inherit;padding:8px;max-height:160px}.composer button{background:var(--accent);color:#fff;border:0;border-radius:12px;padding:0 18px;font-weight:600}.composer button:disabled{opacity:.45;cursor:default}.meta{max-width:780px;margin:6px auto 0;text-align:center;font-size:12px;color:var(--muted)}.login{min-height:100dvh;display:grid;place-items:center;padding:16px}.card{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:36px 28px;max-width:400px;width:100%;text-align:center}.card img{width:56px}.card h1{margin:12px 0 4px}.card p{color:var(--muted);margin:0 0 24px}.gbtn{display:inline-flex;gap:10px;align-items:center;justify-content:center;width:100%;padding:12px;border-radius:12px;border:1px solid var(--border);background:var(--bg);color:var(--text);text-decoration:none;font-weight:600}.err{background:var(--accent-soft);border-radius:10px;padding:10px;font-size:14px;margin-bottom:16px}