svg {
  display: block;
  margin: auto;
}

.item circle {
  stroke-width: 1;
}

.bound {
  width: 15em;
  display: block;
  margin: 1em auto 1em auto;
}

.bound .explanation,
.bound .features {
  color: grey;
  font-style: italic;
  line-height: 1.5em;
  margin-bottom: 1em;
}

.bound .value {
  color: blue;
  text-align: center;
  height: 2em;
  margin: 2em auto 2em auto;
}

.reset {
  text-align: center;
  padding: 0.5em;
  width: 5em;
  border-radius: 0.2em;
  border: 1px solid black;
  display: block;
  margin: auto;
  cursor: pointer;
}

.reset:hover {
  background-color: grey;
}