:root{--primary-color: #564DF1;--primary-hover: #4840d6;--header-bg: #2d3142;--chat-bg: #e8e8e8;--sidebar-bg: #f5f5f5;--text-primary: #0f172a;--text-secondary: #475569;--white: #ffffff;--border-color: #e2e8f0;--input-bg: #f8fafc;--gradient-primary: linear-gradient(135deg, #564df1 0%, #8b5cf6 50%, #ec4899 100%);--gradient-secondary: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .06);--shadow-md: 0 4px 16px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 24px rgba(86, 77, 241, .15);--shadow-xl: 0 12px 32px rgba(86, 77, 241, .2)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow:hidden;background:linear-gradient(135deg,#f8fafc,#f1f5f9);color:var(--text-primary);font-feature-settings:"kern" 1,"liga" 1,"calt" 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