details {
  display: block;
  background-color: var(--c-type0);
  margin-block: 1rem;
  border: 1px solid var(--c-typed);
  border-radius: 2px;
  box-shadow: rgba(0, 0, 0, 0.1) 0px 2px 4px 0px;
}

details summary {
  position: relative;
  padding: 1rem 1rem 1rem 2rem;
  list-style: none;
  cursor: pointer;
  transition: background-color var(--details-bg-color-transition-duration) ease-in-out;
  color: var(--c-typeb);
  border-radius: 2px;
  background-color: transparent;
}

details summary::before {
  content: '▶'; /* right-pointing triangle */
  position: absolute;
  left: 0.5rem;
  top: 1.1rem; /* adjust vertically based on padding/line-height */
  font-size: 0.8em;
  transform: rotate(0deg);
  transition: transform 0.2s ease;
}

details[open] summary::before {
  transform: rotate(90deg); /* points down */
}

details section {
  padding: 1rem;
}