*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #1976d2;--secondary-color: #dc004e;--success-color: #4caf50;--warning-color: #ff9800;--error-color: #f44336;--bg-color: #f5f5f5;--text-primary: #212121;--text-secondary: #757575}body{font-family:Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-color);color:var(--text-primary)}#root{min-height:100vh}*{transition:background-color .3s ease,color .3s ease}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:#888;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#555}