.advanced-lightbox {
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.lightbox-btn {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 1.2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
  transition: background 0.3s ease, transform 0.3s ease;
}

.lightbox-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
  box-shadow: 0 6px 12px rgba(0,0,0,0.5);
}

.lightbox-close {
  background: #e74c3c;
  box-shadow: 0 4px 10px rgba(231, 76, 60, 0.7);
  transition: background 0.3s ease;
}

.lightbox-close:hover {
  background: #c0392b;
}

.lightbox-nav {
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  padding: 10px 15px;
  font-size: 2.5rem;
  box-shadow: 0 5px 15px rgba(0,0,0,0.5);
  transition: background 0.3s ease, transform 0.3s ease;
}

.lightbox-nav:hover {
  background: rgba(255,255,255,0.4);
  transform: scale(1.2);
}