details.admonition.solution {
  border: 1px solid #dddddd;
  border-radius: 4px;
  padding: 0.5em 1em;
  margin: 1em 0;
}

details.admonition.solution > summary {
  cursor: pointer;
}

details.admonition.solution[open] > summary {
  /* Empêche de refermer après ouverture */
  pointer-events: none;
}