:root{--bg: #0b1220;--bg-elev: #111827;--surface: #151d2e;--surface-2: #1b2438;--card: #1b2336;--fg: #f8fafc;--muted: #94a3b8;--muted-2: #64748b;--border: #2a364c;--border-strong: #3d4d66;--accent: #22c55e;--accent-2: #4ade80;--accent-dim: rgba(34, 197, 94, .14);--danger: #ef4444;--warn: #f59e0b;--info: #38bdf8;--claude: #d97757;--shadow: 0 18px 40px rgba(0, 0, 0, .35);--radius: 14px;--font: "Inter", system-ui, sans-serif;--mono: "JetBrains Mono", ui-monospace, monospace}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100dvh;background:var(--bg);color:var(--fg);font-family:var(--font);font-size:16px;line-height:1.55}button,input,textarea,select{font-family:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.app{display:grid;grid-template-columns:280px minmax(0,1fr);min-height:100dvh}.sidebar{background:var(--bg-elev);border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:100dvh}.brand{display:flex;align-items:center;gap:12px;padding:20px 18px 12px}.logo{width:36px;height:36px;border-radius:10px;background:linear-gradient(145deg,#d97757,#f4a27a);display:grid;place-items:center;color:#1a0f0b;box-shadow:0 0 18px #d9775759}.brand h1{margin:0;font-size:17px;letter-spacing:-.02em}.brand p{margin:0;color:var(--muted);font-size:12px}.side-actions{padding:8px 14px 12px;display:flex;flex-direction:column;gap:8px}.btn{border:1px solid transparent;border-radius:10px;padding:10px 12px;font-weight:550;font-size:14px;transition:background .18s ease,border-color .18s ease,transform .12s ease;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px}.btn:active{transform:scale(.98)}.btn-primary{background:var(--accent);color:#052e16}.btn-primary:hover{background:var(--accent-2)}.btn-ghost{background:transparent;color:var(--fg);border-color:var(--border)}.btn-ghost:hover{background:var(--surface)}.btn-danger{background:transparent;color:#fecaca;border-color:#ef444466}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.side-scroll{overflow:auto;padding:4px 10px 20px;flex:1}.section-label{color:var(--muted-2);font-size:11px;font-weight:650;letter-spacing:.08em;text-transform:uppercase;padding:12px 8px 6px}.conv-item,.doc-item{width:100%;text-align:left;background:transparent;border:0;color:var(--fg);border-radius:10px;padding:10px;display:flex;flex-direction:column;gap:2px}.conv-item:hover,.doc-item:hover,.conv-item.active{background:var(--surface)}.conv-item.active{border:1px solid var(--border)}.conv-title,.doc-title{font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conv-meta,.doc-meta{color:var(--muted);font-size:11px}.main{display:grid;grid-template-rows:auto minmax(0,1fr) auto;min-width:0;min-height:100dvh;background:radial-gradient(1200px 500px at 80% -10%,rgba(217,119,87,.08),transparent 50%),var(--bg)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 22px;border-bottom:1px solid var(--border)}.topbar h2{margin:0;font-size:15px;font-weight:600}.topbar-meta{color:var(--muted);font-size:12px}.workspace{display:grid;grid-template-columns:minmax(0,1fr);min-height:0}.workspace.split{grid-template-columns:minmax(0,1fr) minmax(360px,.92fr)}.chat-pane{min-width:0;overflow:auto;padding:28px 0 12px}.thread{width:min(780px,calc(100% - 48px));margin:0 auto;display:flex;flex-direction:column;gap:22px}.empty{text-align:center;padding:72px 16px 24px}.empty-mark{width:64px;height:64px;margin:0 auto 18px;border-radius:18px;background:linear-gradient(145deg,#d97757,#f4a27a);display:grid;place-items:center;color:#1a0f0b;box-shadow:var(--shadow)}.empty h3{margin:0 0 8px;font-size:28px;letter-spacing:-.03em}.empty p{margin:0 auto 28px;max-width:520px;color:var(--muted)}.suggestions{display:grid;grid-template-columns:1fr 1fr;gap:10px;text-align:left}.chip{background:var(--surface);border:1px solid var(--border);color:var(--fg);border-radius:12px;padding:14px;font-size:13.5px;line-height:1.45}.chip:hover{border-color:var(--border-strong);background:var(--surface-2)}.message{display:grid;grid-template-columns:34px minmax(0,1fr);gap:12px}.avatar{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--surface-2);color:var(--muted);flex-shrink:0}.avatar.user{background:#334155;color:#fff}.avatar.bot{background:linear-gradient(145deg,#d97757,#f4a27a);color:#1a0f0b}.md{min-width:0}.md p{margin:0 0 12px}.md p:last-child{margin-bottom:0}.md h1,.md h2,.md h3{line-height:1.25;letter-spacing:-.02em;margin:18px 0 8px}.md h1{font-size:22px}.md h2{font-size:18px}.md h3{font-size:16px}.md ul,.md ol{margin:0 0 12px;padding-left:20px}.md code{font-family:var(--mono);font-size:13px;background:#94a3b81f;padding:1px 5px;border-radius:5px}.md pre{background:#0a101b;border:1px solid var(--border);border-radius:12px;padding:12px 14px;overflow:auto;margin:10px 0 14px}.md pre code{background:none;padding:0;font-size:12.5px;color:#e2e8f0}.md a{color:#7dd3fc}.sources{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.tag{font-size:11px;color:var(--muted);background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:3px 8px}.composer-wrap{padding:8px 16px 18px}.composer{width:min(780px,calc(100% - 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