:root{color-scheme:light;--background:#ffffff;--surface:#ffffff;--surface-soft:#f7f7f8;--surface-raised:#fbfbfc;--ink:#1f2937;--ink-strong:#0f172a;--muted:#6b7280;--faint:#9ca3af;--line:#e5e7eb;--line-strong:#d1d5db;--accent:#0ea5e9;--accent-strong:#075985;--accent-soft:#e0f2fe;--brand-emerald:#10b981;--brand-emerald-soft:#d1fae5;--user:#eef7ff;--shadow:0 12px 32px rgba(15,23,42,0.08)}*{box-sizing:border-box}body,html{height:100%}body,html{background:var(--background)}body{margin:0;overflow:hidden;color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,textarea{font:inherit}button{cursor:pointer}iframe{border:0}.chat-frame{position:relative;display:grid;--sidebar-width:260px;--sidebar-rail-width:48px;grid-template-columns:var(--sidebar-rail-width) minmax(0,1fr);min-height:100dvh;overflow:hidden;background:var(--background);transition:grid-template-columns .22s ease}.chat-frame.sidebar-open{grid-template-columns:var(--sidebar-width) minmax(0,1fr)}.chat-sidebar{position:relative;z-index:3;display:flex;flex-direction:column;gap:10px;width:100%;height:100dvh;min-height:0;overflow:hidden;border-right:1px solid #ececec;background:#f9f9f9;padding:14px 10px 10px;opacity:1;transition:opacity .22s ease}.chat-sidebar.open{opacity:1}.chat-sidebar.collapsed{display:flex;align-items:center;gap:8px;width:var(--sidebar-rail-width);padding:14px 6px}.chat-sidebar-top{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:0 6px}.sidebar-brand{display:inline-flex;align-items:center;gap:9px;min-width:0}.sidebar-brand img{width:28px;height:28px;border-radius:8px;box-shadow:0 6px 14px rgba(14,165,233,.22)}.sidebar-brand 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