.left-panel{
  width: 320px;
  background-color: white;
  padding: 4px;
  z-index: 10;
  position: fixed;
  top: 0;
  left: 0;
  border-radius: 0 3px 3px 0;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}