/* ------------------------------
   SECTION BIODIVERSITÉ
------------------------------ */
.biodiversite {
  background-color: #e8f5e9;
  border-radius: 12px;
  padding: 20px 30px;
  max-width: 1100px;
  margin: 20px auto;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #2e7d32;
  box-shadow: 0 4px 8px rgba(46, 125, 50, 0.2);
}

.biodiversite h2 {
  font-size: 1.8em;
  margin-bottom: 15px;
  border-bottom: 2px solid #81c784;
  padding-bottom: 8px;
}

.biodiversite h3 {
  font-size: 1.3em;
  margin-top: 20px;
  margin-bottom: 8px;
  color: #388e3c;
}

.biodiversite p {
  line-height: 1.6;
  font-size: 1em;
  margin-bottom: 12px;
}

/* ------------------------------
   GRILLE PRINCIPALE
------------------------------ */
.grid-container {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 25px;
  margin-top: 25px;
  align-items: start;
}

/* ------------------------------
   GALERIE VERTICALE
------------------------------ */
.media-flex {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.media-flex img,
.media-flex video {
  width: 100%;
  max-width: 550px; /* plus grand */
  border-radius: 10px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.15);
  margin: 0 auto;
}

/* ------------------------------
   RESPONSIVE
------------------------------ */
@media (max-width: 850px) {
  .grid-container {
    grid-template-columns: 1fr;
  }

  .media-flex img,
  .media-flex video {
    max-width: 100%;
  }
}