.track,.track-inset,.track-overlay{stroke-linecap:round}.track{stroke:#000;stroke-opacity:.3;stroke-width:10px}.track-inset{stroke:#ddd;stroke-width:8px}.track-overlay{pointer-events:stroke;stroke-width:50px;stroke:transparent;cursor:ew-resize}.handle{fill:#fff;stroke:#000;stroke-opacity:.5;stroke-width:1.25px}