body, html {
  padding: 0;
  margin: 0;
  background: #112;
}

#mount {
  max-width: 400px;
  margin: 0 auto;
  background: white;
  padding: 1em;
}

.jump {
  display: inline-block;
  background: grey;
  padding: 1em;
  color: white;
}

.item {
  position: relative;
}

.cta {
  display: block;
  color: white;
  background: #012;
  padding: 1em;
  border: solid 1px white;
  border-top: none;
}

.cta:first-child {
  border-top: solid 1px white;
}

.cta {
  cursor: pointer;
}

.show {
  max-height: 0;
  overflow: hidden;

  transition: max-height 0.4s;
  background: #def;
}

.cont {
    padding: 1em;
}