:root{--color-primary: #667eea;--color-primary-hover: #5a6fd6;--color-primary-light: rgba(102, 126, 234, .1);--color-bg: #f5f5f5;--color-bg-card: #fff;--color-bg-graph: #fafafa;--color-bg-overlay: rgba(0, 0, 0, .5);--color-text: #222;--color-text-secondary: #444;--color-text-muted: #999;--color-border: #e0e0e0;--color-border-light: #eee;--color-input-bg: #fff;--color-input-border: #ddd;--color-error-bg: #fde8e8;--color-error-text: #c62828;--color-danger: #f44336;--color-danger-hover: #d32f2f;--color-secondary-btn: #e0e0e0;--color-secondary-btn-text: #444;--color-toolbar-bg: rgba(255, 255, 255, .95);--color-chip-bg: #ede9fe;--color-chip-text: #6d28d9;--color-node-label: #334155;--color-edge-label: #64748b;--color-link: #cbd5e1;--color-link-active: #94a3b8;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--shadow-lg: 0 20px 60px rgba(0, 0, 0, .15)}.dark{--color-primary: #818cf8;--color-primary-hover: #6366f1;--color-primary-light: rgba(129, 140, 248, .15);--color-bg: #0f172a;--color-bg-card: #1e293b;--color-bg-graph: #111827;--color-bg-overlay: rgba(0, 0, 0, .7);--color-text: #e2e8f0;--color-text-secondary: #cbd5e1;--color-text-muted: #64748b;--color-border: #334155;--color-border-light: #1e293b;--color-input-bg: #1e293b;--color-input-border: #475569;--color-error-bg: #450a0a;--color-error-text: #fca5a5;--color-danger: #ef4444;--color-danger-hover: #dc2626;--color-secondary-btn: #334155;--color-secondary-btn-text: #e2e8f0;--color-toolbar-bg: rgba(30, 41, 59, .95);--color-chip-bg: #312e81;--color-chip-text: #c4b5fd;--color-node-label: #cbd5e1;--color-edge-label: #94a3b8;--color-link: #475569;--color-link-active: #94a3b8;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 20px 60px rgba(0, 0, 0, .5)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe 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