body {
    font: 10px sans-serif;
}
.axis path,
.axis line {
    fill: none;
    stroke: #000;
    shape-rendering: crispEdges;
}
.point {
    stroke: #000;
}

form {
    margin-top: 25px;
    text-align: center;
}
.slider {
    width: 80%;
    display: block;
    margin: 0 auto;
}
output {
    display: block;
    margin: 25px auto;
    font-size:2em;
}
div.tooltip {
    position: absolute;
    text-align: center;
    width: 60px;
    height: 28px;
    padding: 2px;
    font: 12px sans-serif;
    background: lightsteelblue;
    border: 0px;
    border-radius: 8px;
    pointer-events: none;
}
.axis path,
.axis line {
    fill: none;
    stroke: #000;
    shape-rendering: crispEdges;
}

.bar {
    fill: orange;
}

.bar:hover {
    fill: orangered ;
}

.x.axis path {
    display: none;
}

.d3-tip {
    line-height: 1;
    font-weight: bold;
    padding: 12px;
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    border-radius: 2px;
    z-index: 1000;
}

/* Creates a small triangle extender for the tooltip */
.d3-tip:after {
    box-sizing: border-box;
    display: inline;
    font-size: 10px;
    width: 100%;
    line-height: 1;
    color: rgba(0, 0, 0, 0.8);
    content: "\25BC";
    position: absolute;
    text-align: center;
}

/* Style northward tooltips differently */
.d3-tip.n:after {
    margin: -1px 0 0 0;
    top: 100%;
    left: 0;
}
.btn-space {
    margin-right: 30px;
    margin-bottom: 10px;
    margin-top: 10px;
}
.element-space{
    margin-right: 30px;
    margin-bottom: 10px;
    margin-top: 10px;
}