.axis path,
.axis line {
    fill: none;
    stroke: black;
    shape-rendering: crispEdges;
}
/*.axis text {
    fill: none;
    stroke: black;
    shape-rendering: crispEdges;
    font-family: sans-serif;
    font-size: 10px;
}*/

#chart{
    width: 75%;
    float: left;
}
#matrix{
    width: 25%;
    float: left;
}


.brush .extent {
  stroke: #fff;
  fill-opacity: .125;
  shape-rendering: crispEdges;
}