:root{--sidebar-width:280px;--chat-width:828px;--brand-primary:#f9693a;--brand-primary-light:#ff8f5c;--brand-primary-dark:#d95e28;--brand-accent:#e8f1fa;--text-primary:#222;--text-secondary:#666;--text-placeholder:#999;--border-default:#e5e7eb;--border-hover:#f27c38;--bg-white:#fff;--bg-card:#fafafa;--bg-selected:#fff3eb;--bg-hover:#f9fafb;--radius-sm:6px;--radius-md:8px;--radius-lg:10px;--radius-xl:12px;--radius-full:28px;--paper:#fff;--paper-strong:#fff;--canvas:#fff;--ink:#2f2119;--muted:#76665b;--faint:#a49184;--line:#7953371f;--line-strong:#7953372e;--sun:#f59e0b;--sun-strong:#d97706;--coral:#ef6148;--coral-strong:#d84b36;--rose:#fff0e7;--honey:#ffe5a9;--success:#9a5a13;--danger:#b42318;--radius:10px;--shadow-soft:0 18px 44px #7953371a;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-family:Noto Sans 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