.thumbnail-hover {
  width: 100px;
  height: 100px;
  user-select: none;
  border: 1px solid #dee2e6;
  cursor: pointer;
}

.thumbnail-hover:hover {
  border-color: #007bff;
}

.image-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  font-size: 28px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
  opacity: 0.85;
  outline: none;
}

.image-nav:hover {
  background: rgba(0, 0, 0, 0.65);
  opacity: 1;
}

/* Desktop hover */
@media (min-width: 577px) {
  .image-nav:hover {
    background: rgba(0, 0, 0, 0.65);
    opacity: 1;
  }
}

/* Mobile: hover does nothing */
@media (max-width: 576px) {
  .image-nav:hover {
    background: rgba(0, 0, 0, 0.45); 
  }

  .modal-body .image-nav {
    opacity: 0.7 !important; /* always visible */
    width: 25px;
    height: 25px;
    font-size: 12px;
  }
}

.image-nav:active {
  transform: translateY(-50%) scale(0.95);
}

.image-nav-prev {
  left: 16px;
}

.image-nav-next {
  right: 16px;
}

.modal-body .image-nav {
  opacity: 0;
}

.modal-body:hover .image-nav {
  opacity: 0.9;
}

#imageModal .modal-body {
  overflow: hidden; 
  display: flex;
  justify-content: center;
  align-items: center;
}

#imageModal #modalImage {
  max-height: calc(100vh - 8rem - 5rem); /* 8rem header + 5rem padding */
  max-width: 100%;
  object-fit: contain;
}