/* V77: rustige, optionele professionele verdieping op Stamcelonderzoek. */
.professional-depth {
  margin-top: 58px;
  padding: 0;
  overflow: hidden;
  border: 1px solid #b9d9de;
  border-radius: 19px;
  background: #fff;
  box-shadow: 0 13px 32px rgba(17,67,91,.07);
}
.professional-depth-summary {
  position: relative;
  display: grid;
  gap: 5px;
  padding: 25px 64px 24px 27px;
  color: var(--ink);
  background: linear-gradient(135deg,#edf8f8,#f9fcfd);
  cursor: pointer;
  list-style: none;
}
.professional-depth-summary::-webkit-details-marker { display: none; }
.professional-depth-summary::after {
  content: '↓';
  position: absolute;
  top: 50%;
  right: 26px;
  display: grid;
  width: 31px;
  height: 31px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--teal-dark,#0b6870);
  font-weight: 900;
  transform: translateY(-50%);
  transition: transform .2s ease;
}
.professional-depth[open] > .professional-depth-summary::after { transform: translateY(-50%) rotate(180deg); }
.professional-depth-summary:focus-visible { outline: 3px solid #f3bf45; outline-offset: -4px; }
.professional-depth-title { font-size: clamp(1.3rem,2.4vw,1.65rem); font-weight: 850; line-height: 1.25; }
.professional-depth-intro { max-width: 720px; color: #496575; font-size: .92rem; line-height: 1.55; }
.professional-depth-action { margin-top: 5px; color: var(--teal-dark,#0b6870); font-size: .8rem; font-weight: 850; }
.professional-depth-action > span { display: none; }
.professional-depth[open] > .professional-depth-summary { border-bottom: 1px solid #cce1e4; }
.professional-depth[open] .professional-depth-action { font-size: 0; }
.professional-depth[open] .professional-depth-action::before { content: 'Verberg de wetenschappelijke verdieping'; font-size: .8rem; }
.professional-depth-content {
  padding: clamp(26px,4vw,38px);
  background: linear-gradient(145deg,#f4fafb 0%,#fff 62%);
}
.professional-depth-content > h2 { margin: 0 0 10px; font-size: clamp(1.3rem,2.5vw,1.65rem); }
.professional-depth-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 15px; margin: 28px 0; }
.professional-depth-grid > section { position: relative; padding: 23px 22px 22px 66px; border: 1px solid #d1e4e7; border-radius: 16px; background: rgba(255,255,255,.94); }
.professional-depth-grid > section:last-child { grid-column: 1 / -1; }
.professional-depth-grid h3 { margin: 0 0 9px; font-size: 1.04rem; line-height: 1.4; }
.professional-depth-grid p { margin: 0; color: #365668; font-size: .92rem; line-height: 1.72; }
.professional-depth-number { position: absolute; top: 21px; left: 20px; display: grid; width: 30px; height: 30px; place-items: center; border-radius: 50%; color: #fff; background: var(--teal-dark,#0b6870); font-size: .76rem; font-weight: 900; }
.professional-depth-conclusion { padding: 22px 24px; border-left: 4px solid var(--teal,#138d9a); border-radius: 0 15px 15px 0; background: #e8f6f5; }
.professional-depth-conclusion h3 { margin: 0 0 7px; font-size: 1.08rem; }
.professional-depth-conclusion p { margin: 0; }
.professional-depth:target { box-shadow: 0 0 0 3px rgba(19,141,154,.15),0 13px 32px rgba(17,67,91,.07); }
@media (prefers-reduced-motion: reduce) {
  .professional-depth-summary::after { transition: none; }
}
@media (max-width: 700px) {
  .professional-depth { margin-top: 42px; }
  .professional-depth-summary { padding: 22px 55px 21px 19px; }
  .professional-depth-summary::after { right: 17px; }
  .professional-depth-content { padding: 24px 18px; }
  .professional-depth-grid { grid-template-columns: 1fr; }
  .professional-depth-grid > section:last-child { grid-column: auto; }
  .professional-depth-grid > section { padding: 62px 19px 20px; }
  .professional-depth-number { top: 18px; left: 18px; }
}