:root{--background: #ffffff;--surface: #f8f9fa;--surface-hover: #e9ecef;--text-primary: #212529;--text-secondary: #6c757d;--text-link: #0d6efd;--border: #dee2e6;--shadow: rgba(0, 0, 0, .1);--success: #198754;--warning: #ffc107;--error: #dc3545;--info: #0dcaf0}[data-theme=dark]{--background: #1a1a1a;--surface: #2d2d2d;--surface-hover: #3d3d3d;--text-primary: #ffffff;--text-secondary: #adb5bd;--text-link: #6ea8fe;--border: #495057;--shadow: rgba(0, 0, 0, .3);--success: #20c997;--warning: #ffd43b;--error: #ff6b6b;--info: #74c0fc}*{box-sizing:border-box}body{margin:0;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;background-color:var(--background);color:var(--text-primary);transition:background-color .3s ease,color .3s ease}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}#root{min-height:100vh}