/* Lightbox background */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

/* Lightbox image */
.lightbox img {
  max-width: 90%;
  max-height: 90%;
  box-shadow: 0 0 20px rgba(0,0,0,0.7);
}

/* Navigation arrows */
.arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 48px;
  color: #fff;
  cursor: pointer;
  user-select: none;
  padding: 15px;
}

.arrow:hover {
  color: #bbb;
}

.arrow-left {
  left: 40px;
}

.arrow-right {
  right: 40px;
}

/* Close (X) button */
.close-btn {
  position: absolute;
  top: 30px;
  right: 40px;
  font-size: 40px;
  color: #fff;
  cursor: pointer;
}