/* Conversation image preview: in-place thumbnail button plus the full-size overlay. */

.preview {
  display: block;
  margin: 4px 0;
}

.thumbButton {
  display: block;
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  cursor: zoom-in;
}

.thumbButton:focus-visible {
  outline: 2px solid Highlight;
  outline-offset: 2px;
  border-radius: 8px;
}

.thumb {
  display: block;
  max-width: 320px;
  max-height: 200px;
  border: 1px solid rgba(127, 127, 127, 0.35);
  border-radius: 8px;
  background: transparent;
  object-fit: contain;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.72);
  cursor: zoom-out;
  outline: none;
}

.lightbox img {
  max-width: 92vw;
  max-height: 92vh;
  border-radius: 8px;
  object-fit: contain;
}