.line {
  fill: none;
  stroke-width: 4px;
  clip-path: url(#clip);
}

.line:hover {
  stroke-width: 6px;
}

.circle {
  clip-path: url(#clip);
}

div.tooltip {
    position: absolute;
    text-align: center;
    padding: 5px;
    font: 12px sans-serif;
    background: #ffffff;
    border-style: solid;
    border-width: 1px;
    border-color: #00000;
    border-radius: 8px;
    pointer-events: none;
}