body.popup-active {
  overflow: hidden;
}
.insta-post { cursor: pointer; display: inline-block; margin: 10px; }
.popup-overlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.9); z-index: 9999; display: flex;
  justify-content: center; align-items: center;
}
.popup-content {
  background: #fff; width: 80%; height: 80%; display: flex; border-radius: 8px;
}
.popup-image-slider {
  flex: 2; background: #000; display: flex; justify-content: center; align-items: center;
}
.popup-image-slider img { max-width: 100%; max-height: 100%; }
.popup-details {
  flex: 1; padding: 20px; overflow-y: auto;
}
.popup-close { position: absolute; top: 20px; right: 30px; font-size: 24px; color: white; cursor: pointer; }