:root{--bg-color: #f8fafc;--surface-color: #ffffff;--text-color: #0f172a;--text-muted: #64748b;--border-color: #e2e8f0;--primary-color: #0f172a;--primary-hover: #334155;--primary-text: #ffffff;--msg-user-bg: #f1f5f9;--msg-user-text: #0f172a;--msg-ai-bg: #ffffff;--msg-ai-border: #e2e8f0;--input-bg: #ffffff;--hover-bg: #f1f5f9;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--sidebar-bg: #ffffff;--font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--btn-icon-color: #64748b}[data-theme=dark]{--bg-color: #09090b;--surface-color: #09090b;--text-color: #fafafa;--text-muted: #a1a1aa;--border-color: #27272a;--primary-color: #fafafa;--primary-hover: #e4e4e7;--primary-text: #09090b;--msg-user-bg: #27272a;--msg-user-text: #fafafa;--msg-ai-bg: #09090b;--msg-ai-border: #27272a;--input-bg: #18181b;--hover-bg: #27272a;--shadow-sm: none;--shadow-lg: 0 10px 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