.ckard-pdf-thumbs {
  margin-left: 8px;
  display: inline-block;
  user-select: none;
}
.ckard-pdf-thumbs .thumb {
  font-size: 20px;
  margin-right: 2px;
  color: #888;
  opacity: 0.5;
  cursor: pointer;
  transition: color 0.2s ease, opacity 0.2s ease;
}
.ckard-pdf-thumbs .thumb.active {
  color: #4CAF50;
  opacity: 1;
}
.ckard-pdf-avg {
  font-size: 14px;
  color: #666;
  margin-left: 4px;
}