:root{--bg: #f6f7f9;--surface: #ffffff;--surface-2: #f0f2f5;--surface-3: #e8ebef;--border: #e3e6ea;--border-strong: #d2d7de;--text: #17191c;--muted: #6b7280;--accent: #2f6fed;--accent-hover: #245fd6;--on-accent: #ffffff;--danger: #d14343;--success: #16794a;--bubble-user: #2f6fed;--shadow: 0 10px 30px rgba(15, 23, 42, .12);--radius: 12px;--sidebar: 272px;color-scheme:light}@media (prefers-color-scheme: dark){:root:not([data-theme=light]){--bg: #14161a;--surface: #1b1e23;--surface-2: #22262c;--surface-3: #2a2f36;--border: #2c3138;--border-strong: #3a414a;--text: #e8eaed;--muted: #9aa0a6;--accent: #6b9bff;--accent-hover: #86adff;--on-accent: #10131a;--danger: #ff6b6b;--success: #5fd08a;--bubble-user: #3b6fe0;--shadow: 0 10px 30px rgba(0, 0, 0, .45);color-scheme:dark}}:root[data-theme=dark]{--bg: #14161a;--surface: #1b1e23;--surface-2: #22262c;--surface-3: #2a2f36;--border: #2c3138;--border-strong: #3a414a;--text: #e8eaed;--muted: #9aa0a6;--accent: #6b9bff;--accent-hover: 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