.preview {
	display: inline-block;
	margin: 10px;
	position: relative;
}

.preview img {
	max-width: 100%;
	max-height: 480px;
	margin-right: 10px;
	height: auto;
}

.delbutton-overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
}

.delbutton-overlay:before {
  content: ' ';
  display: block;
  /* adjust 'height' to position overlay content vertically */
  height: 25%;
}