.wrapper {
  position: relative;
}

.y-axis-label {
  fill: black;
  font-size: 1.4em;
  text-anchor: middle;
  transform: rotate(-90deg);
}

.listening-rect {
  fill: transparent;
}
body {
  display: flex;
  justify-content: center;
  padding: 5em 1em;
  font-family: sans-serif;
}

.dotted {
  stroke: #5c5c5c;
  stroke-dasharray: 1 1;
  fill: none;
}

.tooltip {
  opacity: 0;
  position: absolute;
  top: -14px;
  left: 0;
  padding: 0.6em 1em;
  background: #fff;
  text-align: center;
  line-height: 1.4em;
  font-size: 0.9em;
  border: 1px solid #ddd;
  z-index: 10;
  transition: all 0.1s ease-out;
  pointer-events: none;
}

.tooltip:before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 12px;
  height: 12px;
  background: white;
  border: 1px solid #ddd;
  border-top-color: transparent;
  border-left-color: transparent;
  transform: translate(-50%, 50%) rotate(45deg);
  transform-origin: center center;
  z-index: 10;
}

.tooltip-date {
  margin-bottom: 0.2em;
  font-weight: 600;
  font-size: 1.1em;
  line-height: 1.4em;
}