.axis path,
.axis line {
    fill: none;
    stroke: #000;
}

div.tooltip {
    position: absolute;
    text-align: center;
    padding: 5px;
    font: 12px sans-serif;
    background: lightsteelblue;
    border: 0px;
    pointer-events: none;
}

.chart-inner-bg {
  fill-opacity: 0;
  cursor: ew-resize;
}

text {
  /*type here your css*/
  font-size: 12px;
}