nvd3/src/css/axis.css

A reusable charting library written in d3.js

.nvd3 .nv-axis {
    pointer-events:none;
    opacity: 1;
}

.nvd3 .nv-axis path {
    fill: none;
    stroke: #000;
    stroke-opacity: .75;
    shape-rendering: crispEdges;
}

.nvd3 .nv-axis path.domain {
    stroke-opacity: .75;
}

.nvd3 .nv-axis.nv-x path.domain {
    stroke-opacity: 0;
}

.nvd3 .nv-axis line {
    fill: none;
    stroke: #e5e5e5;
    shape-rendering: crispEdges;
}

.nvd3 .nv-axis .zero line,
    /*this selector may not be necessary*/ .nvd3 .nv-axis line.zero {
    stroke-opacity: .75;
}

.nvd3 .nv-axis .nv-axisMaxMin text {
    font-weight: bold;
}

.nvd3 .x  .nv-axis .nv-axisMaxMin text,
.nvd3 .x2 .nv-axis .nv-axisMaxMin text,
.nvd3 .x3 .nv-axis .nv-axisMaxMin text {
    text-anchor: middle;
}

.nvd3 .nv-axis.nv-disabled {
    opacity: 0;
}