.fade-section {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease-in-out, visibility 0.4s ease-in-out;
  pointer-events: none;
  display: block !important;
}

.fade-section.active {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
  z-index: 1;
}


.fade-child {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.fade-section.active .fade-child {
  opacity: 1;
  transform: translateY(0);
}

.slide {
  opacity: 0;
  transition: opacity 0.4s ease-in-out;
  display: block; /* 👈 SIEMPRE visible, se oculta solo con opacidad */
  pointer-events: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
}

.slide.active {
  opacity: 1;
  pointer-events: all;
  position: relative;
}

.fade-section {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease-in-out, visibility 0.4s ease-in-out;
  pointer-events: none;
  /* 👇 No pongas display aquí. Se gestiona con clases como hidden. */
}

.fade-section.active {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
  z-index: 1;
}

.advanced-slider-container {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: flex-start;
  gap: 20px;
  flex-wrap: wrap;
}

.main-slide-view {
  flex: 1;
  max-width: 70%;
  position: relative;
  min-height: 300px; /* 👈 espacio mínimo para evitar saltos */
  overflow: hidden;  /* 👈 evita que se vean los slides apilados */
}

.main-slide-view .slide {
  display: none;
}

.main-slide-view .slide.active {
  display: block;
}

.imagen-principal {
  width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.thumbnail-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr); /* 🔥 Dos columnas */
  gap: 10px;
  max-height: 600px;
  overflow-y: auto;
}

.thumbnail {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border: 3px solid transparent;
  cursor: pointer;
  border-radius: 5px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.thumbnail.active-thumb {
  border-color: #0249aa;
  transform: scale(1.05);
}
.fade-section.active {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
  z-index: 1;
}

.slide video.imagen-principal {
  opacity: 0;
  transition: opacity 0.4s ease-in-out;
}

.slide.active video.imagen-principal {
  opacity: 1;
}

.placeholder-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  padding: 30px;
  background-color: #f4faff;
  border: 2px dashed #0249aa;
  border-radius: 20px;
  margin: 20px 0;
  text-align: center;
  transition: opacity 0.4s ease-in-out;
  animation: fadeInPlaceholder 1s ease;
}

.placeholder-icon {
  font-size: 64px;
  color: #0249aa;
  animation: bounce 1.6s infinite;
}

.placeholder-text {
  margin-top: 15px;
  font-size: 18px;
  color: #0249aa;
  font-weight: 500;
  font-family: "Segoe UI", sans-serif;
}

/* Animaciones */
@keyframes fadeInPlaceholder {
  0% {
    opacity: 0;
    transform: translateY(15px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}