.section.main-banner {
  position: relative;
  width: 100%;
  height: 100vh; /* tinggi penuh layar */
  overflow: hidden;
}

.video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  background-color: rgba(0,0,0,0.5); /* 0.5 = lebih gelap */
  width: 100%;
  height: 100%;
}

#bg-video {
  position: absolute;
  top: 50%;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  transform: translate(-50%, -50%);
  object-fit: cover;
  z-index: 0;
}

.card-img-container {
  width: 100%;
  height: 250px; /* tinggi seragam untuk semua foto */
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

.card-img-container img {
  width: 100%;
  height: 100%;
  object-fit: cover; /* foto dipotong rapi */
}


.struktur-card {
  transition: transform 0.3s, box-shadow 0.3s, opacity 0.3s;
  cursor: pointer;
}

.struktur-card.active {
  transform: scale(1.05); /* membesar */
  box-shadow: 0 8px 20px rgba(0,0,0,0.3); /* lebih tegas */
  border: 2px solid #007bff; /* garis biru (bisa ganti warna) */
  z-index: 10;
}

.struktur-cards .struktur-card:not(.active) {
  opacity: 0.6; /* meredupkan card lain */
}