Courier New', Courier, monospace;
  font-size:16px;
  background-color:rgba(0, 0, 0, .3);
  text-align:left;
}

#explainer.closed {
  visibility:hidden;
}

p {
  margin:10px 0;
}

input[type=range] {
  -webkit-appearance: none;
  width: 40%;
  vertical-align: middle;
}
input[type=range]:focus {
  outline: none;
}
input[type=range]::-webkit-slider-runnable-track {
  width: 100%;
  height: 0px;
  cursor: pointer;
  box-shadow: 1px 1px 1px rgba(0, 0, 0, 0), 0px 0px 1px rgba(13, 13, 13