portails/assets/scss/components/_details.scss

details {
  display: block;
  border: 1px solid $gray-200;
  border-radius: 0.25rem;
  padding: 0.5rem 1rem 0;
  margin: 0.5rem 0;
}

/*
details summary {
  &::marker {
    content: "";
  }
}
*/

summary {
  list-style: none;
  display: inline-block;
  width: calc(100% + 2rem);
  margin: -0.5rem -1rem 0;
  padding: 0.5rem 0.75rem;
}

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

summary:hover {
  background: $gray-100;
}

details summary::before {
  display: inline-block;
  content: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='rgba%2829, 45, 53, 0.75%29' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M5 14l6-6-6-6'/%3e%3c/svg%3e");
  transition: transform 0.35s ease;
  transform-origin: center center;
  margin-right: 0.375rem;
}

details[open] > summary::before {
  transform: rotate(90deg);
}

/*
details summary > * {
  display: inline-block;
}
*/

details[open] {
  padding: 0.5rem 1rem;
}

details[open] > summary {
  border-bottom: 1px solid $gray-300;
  margin-bottom: 0.5rem;
}

details h2,
details h3,
details h4 {
  margin: 1rem 0 0.5rem;
}

details p:last-child {
  margin-bottom: 0;
}

details ul,
details ol {
  margin-bottom: 0;
}

details pre {
  margin: 0 0 1rem;
}