.lightbox-overlay {
  display: none; position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: 1000;
  cursor: pointer;
}

.lightbox-image {
  display: block;
  max-width: 90%; max-height: 90vh;
  margin: auto; position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}

article img { cursor: pointer; transition: opacity 0.3s; }

.close-button {
  position: fixed;
  top: 20px; right: 20px;
  color: white;
  font-size: 30px;
  cursor: pointer;
  z-index: 1001;
}