/* Overlay container – hidden until activated */
#lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: none;           /* toggled via JS */
  align-items: center;
  justify-content: center;
  z-index: 9998;
}

/* Enlarged image inside overlay */
#lightbox-overlay img {
  max-width: 90vw;
  max-height: 90vh;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.6);
  cursor: zoom-out;
}

/* Close (✕) button */
#lightbox-overlay .close-btn {
  position: absolute;
  top: 20px;
  right: 30px;
  font: 700 2rem/1 sans-serif;
  color: #fff;
  cursor: pointer;
}