:root{--brand-blue: #1a73e8;--brand-teal: #00a884;--brand-green: #25D366;--brand-indigo: #6366f1;--brand-red: #ea4335;--brand-yellow: #fbbc04;--bg-primary: #ffffff;--bg-secondary: #f5f5f5;--bg-tertiary: #e8eaed;--bg-chat: #e5ddd5;--surface: #ffffff;--surface-elevated: #ffffff;--surface-overlay: rgba(0, 0, 0, .05);--text-primary: #202124;--text-secondary: #5f6368;--text-disabled: #9aa0a6;--text-inverse: #ffffff;--accent-primary: var(--brand-blue);--accent-secondary: var(--brand-teal);--accent-phone: var(--brand-indigo);--border: #e0e0e0;--divider: #f0f0f0;--success: #34a853;--warning: #fbbc04;--error: #ea4335;--info: #4285f4;--shadow-sm: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.07);--shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.05);--shadow-lg: 0 10px 15px rgba(0,0,0,.09), 0 4px 6px rgba(0,0,0,.04);--radius-xs: 4px;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-2xl: 20px;--radius-full: 9999px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--header-height: 64px;--bottom-nav-height: 56px;--sidebar-width: 360px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s ease;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--primary-color: var(--accent-primary);--primary-dark: #1557b0;--secondary-color: var(--accent-secondary);--danger-color: var(--error);--warning-color: var(--warning);--error-color: var(--error);--surface-color: var(--surface);--background-color: var(--bg-secondary);--border-color: var(--border);--shadow-1: var(--shadow-sm);--shadow-2: var(--shadow-md);--border-radius: var(--radius-md);--message-spacing: var(--space-2)}[data-theme=dark]{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--bg-chat: #111827;--surface: 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