:root{--accent: #7C3AED;--accent-secondary: #A78BFA;--accent-blue: #6366F1;--accent-amber: #F59E0B;--accent-purple: #7C3AED;--bg-page: #1E1E2E;--bg-sidebar: #1E1E2E;--bg-card: #282A3A;--bg-hover: #2D2F3F;--bg-active: #323454;--bg-input: #282A3A;--bg-modal-overlay: rgba(0, 0, 0, .6);--text-primary: #E5E7EB;--text-secondary: #9CA3AF;--text-muted: #6B7280;--border-color: #323454;--border-light: #2D2F3F;--danger: #EF4444;--warning: #F59E0B;--success: #34D399;--online-green: #34D399;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 8px rgba(0, 0, 0, .35);--shadow-lg: 0 10px 20px rgba(0, 0, 0, .4);--bubble-outgoing: #282A3A;--bubble-incoming: #2D2F3F;--chat-bg: #1A1A2E;--sidebar-header: #1E1E2E}.theme-light{--accent: #7C3AED;--accent-secondary: #8B5CF6;--bg-page: #F8FAFC;--bg-sidebar: #FFFFFF;--bg-card: #FFFFFF;--bg-hover: #F1F5F9;--bg-active: #E2E8F0;--bg-input: #FFFFFF;--bg-modal-overlay: rgba(0, 0, 0, .3);--text-primary: #0F172A;--text-secondary: #64748B;--text-muted: #94A3B8;--border-color: #E2E8F0;--border-light: #F1F5F9;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 6px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 20px rgba(0, 0, 0, .08);--bubble-outgoing: #7C3AED;--bubble-incoming: #FFFFFF;--chat-bg: #E8E4F0;--sidebar-header: #FFFFFF}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg-page);color:var(--text-primary);height:100vh;overflow:hidden}#root{height:100vh}.app-container{display:flex;height:100vh;max-width:1600px;margin:0 auto}.sidebar{width:340px;min-width:280px;background:var(--bg-sidebar);border-right:1px solid var(--border-color);display:flex;flex-direction:column;flex-shrink:0}.sidebar-header{padding:16px 20px;display:flex;align-items:center;justify-content:space-between;min-height:60px;border-bottom:1px solid var(--border-color)}.sidebar-header 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