body{background-color: #1deaff;}

details {
  margin-bottom: 16px;
}

summary {
  list-style: none;
  cursor: pointer;
}

summary::-webkit-details-marker {
  display: none;
}

.item-title {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid #000;
  border-radius: 999px;
  font-size: 14px;
}

.item-content {
  margin-top: 10px;
  padding: 16px;
  background: #fff;
  border: 1px solid #000;
  width: fit-content;
  max-width: 420px;
  font-size: 14px;
  line-height: 1.6;
}

details:not([open]) .item-content {
  display: none;
}