*{margin:0;padding:0;box-sizing:border-box}:root{--bg-gradient-start: #667eea;--bg-gradient-end: #764ba2;--container-bg: #ffffff;--graph-bg: #ffffff;--text-primary: #333333;--text-secondary: #666666;--text-tertiary: #555555;--card-bg: #f8f9fa;--card-border: #e0e0e0;--shadow-color: rgba(0, 0, 0, .3);--shadow-card: rgba(0, 0, 0, .1)}[data-theme=dark]{--bg-gradient-start: #0a0a0f;--bg-gradient-end: #0d1117;--container-bg: #1a1d29;--graph-bg: #32375b;--text-primary: #e2e8f0;--text-secondary: #94a3b8;--text-tertiary: #cbd5e1;--card-bg: #262c3d;--card-border: #3d4455;--shadow-color: rgba(0, 0, 0, .6);--shadow-card: rgba(0, 0, 0, .3)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:linear-gradient(135deg,var(--bg-gradient-start) 0%,var(--bg-gradient-end) 100%);min-height:100vh;padding:20px;transition:background .3s ease}.container{max-width:1600px;margin:0 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