:root{--bg: #0b1020;--bg-soft: #121a2e;--surface: #161f38;--surface-2: #1d2947;--border: #26324f;--text: #e8edf9;--muted: #8ea0c4;--accent: #4f7cff;--accent-soft: rgba(79, 124, 255, .14);--ok: #2fbf71;--warn: #f0a92c;--danger: #f0554b;--radius: 12px;--radius-sm: 8px;--shadow: 0 10px 30px rgba(0, 0, 0, .28);--font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;--nav-h: 60px;--viz-1: #3987e5;--viz-2: #199e70;--viz-3: #d95926;--viz-4: #c98500}@media(prefers-color-scheme:light){:root{--bg: #f4f6fb;--bg-soft: #ffffff;--surface: #ffffff;--surface-2: #f0f3fa;--border: #dde3ef;--text: #16203a;--muted: #64738f;--accent-soft: rgba(79, 124, 255, .1);--shadow: 0 6px 20px rgba(20, 30, 60, .08);--viz-1: #2a78d6;--viz-2: #1baf7a;--viz-3: #eb6834;--viz-4: 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var(--border);border-radius:var(--radius-sm)}.chat-transcript.sim{max-height:50vh;min-height:220px}.bubble{max-width:85%;padding:7px 10px;border-radius:12px;font-size:13.5px;line-height:1.4}.bubble.in{align-self:flex-start;background:var(--surface-2);border-top-left-radius:4px}.bubble.out{align-self:flex-end;background:var(--accent-soft);border-top-right-radius:4px}.bubble.out.human{background:#2fbf7129}.bubble.out.alert{background:#f0a92c29}.bubble-body{white-space:pre-wrap;overflow-wrap:anywhere}.bubble-meta{font-size:11px;color:var(--muted);margin-bottom:2px}.bubble-error{font-size:11.5px;color:var(--danger);margin-top:3px}.chat-system{align-self:center;font-size:11.5px;color:var(--muted);font-style:italic;text-align:center;padding:2px 8px}.chat-compose{display:flex;gap:8px;margin-top:8px;align-items:flex-end}.chat-compose textarea{min-height:44px;max-height:160px;flex:1;font-family:var(--font)}.chat-compose 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